yingfeng brick machine
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Address: Block 5,South Longhai Road and East Tongbai Road,Zhongyuan District,Zhengzhou City,Henan Province,China
Home > FAQ
  Q: The main reason for the high damage rate of sintered clay bricks
Nowadays, the technology of sintered brick enterprises is also becoming mature with the improvement of the level of kiln construction technology, but there is still a common phenomenon in some enterprises that the damage rate is relatively high. In order to further improve the quality of sintered bricks and reduce the damage rate of finished products, we need to start from the following aspects:

1. Raw material selection and matching
The selection of raw materials is basically determined when the kiln is built and the site is selected, so it is a bit impractical to discuss the selection of raw materials after production. If the determined raw materials have low plasticity or too high drying sensitivity coefficient, it is easy to cause more fractures in the finished bricks. At this time, it can only be achieved through the matching of particles, the outsourcing and aging of raw materials, and the pressure of extrusion molding. Make adjustments.

2. Blending of internal combustion
The blending of internal combustion must be accurate and stable. The demand for internal combustion varies depending on the performance of the kiln, the climate, the moisture content and other factors. Therefore, there is no absolute uniform standard in the production process. The trial blending trial firing should be carried out according to the actual situation, and the trial blending should be accurate. According to the record of the fired temperature and the fire color of the finished brick, an accurate blending standard is determined and strictly implemented. If the internal combustion is too low, it will cause a large amount of external combustion input and even produce unqualified products. If the internal combustion is too high, it is easy to cause excessive roasting fire and increase the damage of finished bricks.

3. Moisture control and mechanical damage in production
The requirements in production are also quite strict, and the moisture content is the most important link. If the water content is too high, the hardness of the brick will decrease, and the general tunnel kiln is about 14-18 layers. If the brick hardness does not meet the requirements, it will cause the bottom brick to break and deform, and in severe cases, it may even lead to inverted bricks and affect normal firing. In the production, if the water content is improper or the water content is unevenly mixed, uneven mixing, etc. will cause poor healing of the bricks and bring difficulties to the drying and roasting.

4. Brick drying
Drying is the most difficult part to master. If the moisture content is too high, a large amount of vaporized water is easily produced during drying. If the temperature is too rapid in the initial stage of drying, it will cause cracks when the vaporized water passes through the surface of the body. In severe cases, the bricks will break. . Excessive moisture content can also easily cause the bricks to regain moisture and soften under the influence of the climate environment, which brings great difficulties to the baking work.

5. Cooling of finished bricks
During the firing process of bricks, the temperature in the kiln will generally rise to above 1000 degrees Celsius, and the body will become a solid solution. If it is suddenly cold, it will cause the body to solidify and shrink too quickly and cause fracture. Therefore, a reasonable heat preservation time must be determined according to the change of outdoor temperature, and the heat preservation length is sufficient to effectively control the occurrence of cooling fracture.

6, the code billet force
After the bricks are formed, depending on the hardness and plasticity of the raw materials, the bearing capacity is also the same. If the pressure is too large or the force is uneven, it will cause crushing. This phenomenon generally occurs within six hours after the completion of the bricks. It is already broken when incorporated into the dry. Therefore, it is necessary to ensure that the surface of the kiln car is flat, the stack must be straight and stable, the contact points are in good contact, and the billet is not inclined. Raw materials with too low plasticity can even consider choosing an appropriate amount of additives.
There are many other reasons that cause high damage. According to actual analysis and proper adjustment in all aspects, the problem of high damage rate of sintered bricks can be solved.
  Q: Four key factors in the production of sintered clay bricks
Generally speaking, the production process of sintered bricks consists of four parts: the preparation of raw materials, the formation of blanks, the drying of wet blanks and the production of finished products.
Preparation of raw materials
After the brick raw materials are extracted, some raw materials can be processed by adding water to stir and milling equipment, while some raw materials cannot be processed. \"Raw materials such as mountain soil, coal gangue and shale can also be crushed and finely crushed and then mixed with water and ground. The selection and preparation of raw materials directly affect the quality of finished bricks, so the raw materials are the basis for the preparation of sintered bricks. Explains the importance of raw materials and raw material preparation.
Billet formation
A workshop for processing and forming brick materials. The blank molding method of winding bricks in my country is basically plastic extrusion molding. There are three plastic extrusion molding methods, namely plastic extrusion molding, semi-rigid plastic extrusion molding and hard plastic extrusion molding.

These three extrusion molding methods are distinguished based on the molding with different moisture content. When the moisture content of the wet billet is greater than 16% (dry basis and below are dry basis), it is plastic extrusion molding. When the moisture content of the wet billet is 14-16%, it is semi-rigid extrusion molding. When the moisture content of the wet billet is 12-14%, it is a hard plastic extrusion molding.

Billet forming includes: feeding, mixing, adding water and grinding equipment before the raw material enters the forming workshop; after forming, the qualified mud stick and wet billet are formed. Molding to achieve the shape and structure of the product is the composition of the shape and structure of the product.

Therefore, it is often said that molding is the foundation. In other words, the external shape and structure of the product are both shape and shape. In other words, molding is the basic meaning of the brick making process. Because the quality of the molded body is directly related to the appearance quality of the finished brick.

Drying of wet billets
When the wet billet is formed in the forming workshop, the wet billet should be dehydrated and dried. There are two ways to dry sintered brick wet body: natural drying and artificial drying.

The wet billet natural drying method is to place the wet billet conveying code on the ridge of the natural drying part to form a stack, and manually invert the frame, use the atmosphere for natural drying, so that the wet billet is cold sun-dried into a dry billet.

The wet billet is dried by hand, and there is an artificial drying chamber to dry the wet billet.

The artificial drying chamber is divided into three types: large section tunnel drying chamber, small section tunnel drying chamber and small section tunnel drying chamber, which are used for artificial drying of wet billets. These three drying methods, whether manually or mechanically, put the wet billets on the drying cart to form a pile. At this time, the dryer enters the dryer coded as a pile of wet billets into the drying room to dry the wet billets.

The heat medium in the drying chamber usually comes from the waste heat of the sintering kiln or hot air furnace. Regardless of the drying method and the artificial drying method, the drying process of the wet body must be followed to ensure that the body is not deformed or cracked.

If there is a problem with the drying of the wet body, the appearance and quality of the product cannot be guaranteed, the reject rate is high, the output is reduced, the cost of finished bricks increases, and the economic benefits of the enterprise are not good. Therefore, it is often said that green body drying is a guarantee. This illustrates the importance of wet green drying in the process of making bricks. When the wet billet is dry and the residual moisture is less than 6%, the billet is fired into the baking kiln.

Production of finished products
Kilns used for roasting are generally called wheel kilns and tunnel kilns. In the baking kiln, the bricks are manually placed in the kiln to form a stack. Roasting is carried out in the kiln. When the tunnel kiln is roasted, the bricks are placed on the kiln car by manual or mechanical means, and the bricks stacked from the tunnel kiln head to the kiln end are stacked on the kiln car. From the tunnel kiln head to the kiln tail Baked into bricks. The calcining flame in the kiln does not run, but the billets are transported on the kiln and then roasted in the kiln.

No matter whether you use a wheel kiln or a tunnel kiln to bake the bricks, you cannot burn green bricks; secondly, you can\\'t burn them over fire, or burn overheated bricks, or burnt bricks. Therefore, it is often said that roasting in the brick making process is the key to explaining the roasting ratio in the firing process.

The four important components in the process of sintering bricks are: raw materials are the foundation, molding is the foundation, drying is the guarantee, and roasting is the key. These four parts are interdependent.

  Q: How to make red bricks?

The production process of sintered bricks is generally composed of four parts: raw material preparation, blank body forming, wet blank drying, and finished product firing.After raw materials are excavated, some can be processed by adding water, stirring and grinding equipment,while others will not work.Raw materials,such as mountain soil, coal gangue and shale,are to be broken and finely chopped, then followed by water mixing and grinding.The choice and preparation of raw materials directly affect the quality of the finished product.As the saying goes, raw materials are fundamental to making sintered bricks,showing the importance of the raw materials preparation and raw materials.

After the selected brick raw materials are processed, they enter the molding workshop for molding.Blank forming method basically uses plastic extrusion molding in China.There are three methods for plastic extrusion. That is plastic extrusion molding,semi-hard plastic extrusion molding and hard plastic extrusion molding.

These three extrusion methods are based on the difference in the moisture content of the molding.When the moisture content more than 16%,wet billet molding is plastic extrusion molding. When the moisture content equals 14-16%, its semi-hard plastic extrusion molding. When the moisture content equals 12-14% ,its hard plastic extrusion molding.Blank forming includes: feeding material , mixing,adding water and grinding equipment processing before raw materials entering the molding shop not brick extruding machine.After passing through the molding brick machine, the qualified mud and wet billet are formed.Forming process should fulfill the requirement of the shape and structure.Forming is the foundation of the brick making process.The quality of the formed body is directly related to the appearance quality of the finished tile.

After the wet billets formed from the molding plant, they need to be dried by dehydration.In the production process of sintered bricks, there are two ways of drying wet blank: natural drying and artificial drying.

The natural drying is to place the wet billet on the billet stalk in the natural drying place,manually invert the code and use the atmosphere to wet the cold billet into a dry billet.Artificial drying is to use equipped artificial drying chamber to dry wet billet.The artificial drying room is divided into three types: large-section tunnel drying room, small-section tunnel drying room and chamber drying room.Whichever type is adopted, it is manually or mechanically placing wet billet on a drying truck,then put it into drying chamber.The heat medium in the drying chamber generally comes from the waste heat of the sintering kiln or the hot blast stove.Whichever drying method is adopted, it must be ensured that the blank will not be deformed or chapped during the drying process.If the wet billet cant guarantee the appearance quality of the product during drying, it will cause high reject rate, falling output,increasing cost of the finished brick, which are definitely harmful to company economic efficiency.This shows the importance of drying wet billet in brick making process.

If the residual moisture rate after drying is less than 6%,the wet billet could be fired in the baking kiln.Hoffman kiln and tunnel kiln are normally used for roasting.When using Hoffman kiln, the brick code is manually placed in the kiln and the fire is roasted in the kiln.When using tunnel kiln,the brick code is manually or mechanically placed in the kiln cart.The kiln car enters kiln head and exits from the kiln tail. The brick blanks on the kiln car are roasted into bricks.The roasting flame in the kiln doesnt move just the kiln cart.Whether using Hoffman kiln or tunnel kiln,this two conditions must be followed:1.never use underfire to produce unburnt brick.2.never use big fire to produce coke brick.It is often said that roasting is the key of the brick making process,which explains the importance of roasting in the brick making process.

Sintered brick process is composed of four parts.To sum up,it is said that the raw material is fundamental,molding is the basis,drying is ensure and roasting is the key. These four parts are interdependent.

  Q: How to make bricks from clay ?

A brick is building material used to make walls, pavements and other elements in masonry construction. Traditionally, the term brick referred to a unit composed of clay, but it is now used to denote any rectangular units laid in mortar. A brick can be composed of clay-bearing soil, sand, and lime, or concrete materials. Bricks are produced in numerous classes, types, materials, and sizes which vary with region and time period, and are produced in bulk quantities. Two basic categories of bricks are fired and non-fired bricks.

Block is a similar term referring to a rectangular building unit composed of similar materials, but is usually larger than a brick. Lightweight bricks (also called lightweight blocks) are made from expanded clay aggregate.

Fired bricks are one of the longest-lasting and strongest building materials, sometimes referred to as artificial stone, and have been used since circa 5000 BC. Air-dried bricks, also known as mudbricks, have a history older than fired bricks, and have an additional ingredient of a mechanical binder such as straw.

Bricks are laid in courses and numerous patterns known as bonds, collectively known as brickwork, and may be laid in various kinds of mortar to hold the bricks together to make a durable structure


  Q: How to open a clay brick factory?

Basic elements:

1. raw materials   2.water   3.electricity   4 land   5.fund

Step 1: Investigate the market and confirm the demand

To determine new plant production scale should refer to the local market conditions.First of all, we shall thoroughly investigate local brick and tile market conditions and grasp following situation:current market demand,actual production volume of existing companies, how big the market gap is,current selling price of brick and tile products and the demand and price trend.Besides,is there the same new brick factory to be built?What is the production scale?After mastering above conditions, the new plant can be determined.

Step 2: Confirm brick type

Formulate product production plan according to the condition of raw materials.When you build a new factory, you must have a clear understanding of the local production materials.After determining the dosing plan and selecting raw materials, we must determine the production plan and scale according to local market conditions. It is suitable for hollow brick or hole brick?Whether annual production scale should be 50 million or 80 million?

Step 3: Confirm the production process and equipment

Selected production process and equipment according to raw materials.Clarify your raw material properties before starting new plant.Please have experienced technical staff to plan the production route and conduct selection or design production equipment.Not all equipment can adapt to your raw materials.

Step 4: Infrastructure construction

After determining production scale, it is possible to determine area, process direction, equipment layout of production plant and the location of living area according to the size of production volume.Plan plant elevation based on local geological, hydrological and meteorological conditions.]Arrange various production workshops according to the wind direction.To determine the mode of production, shall it be labor-intensive companies or technology-intensive enterprises,requires whole careful plan and design by technicians based on the results of technical and economic analysis.

1. Civil work: including Chenhuachi, workshops, doors, windows, and roofs of aging workshop.Meet installation requirements of reversible spreaders, multi-bucket excavators and conveyor belts.At the same time, water supply and drainage and heating are completed.

2. Aging workshop:The crushing workshop completes all civil construction tasks inside and outside the crushing room and feeding room.Complete the plant closure work.Meet installation requirements of feeder boxes, belts, crushers, vibrating screens, back-feed belts, and aging conveyor belts etc.

3. Molding workshop:including the feeding box, mixer, clay machine, extruder, cutting and transportation construction, as well as the kiln base after pouring belt,top car machine, tractor, kiln channel pavement, cushion and other construction.

4. The civil construction scope for air compressor stations, plumbing, substations, fire pump rooms, etc. includes drying kiln, roasting kiln, ferry car,hydraulic pusher,return tractor,traction machine, winch, tidal fan, blower, kiln cooling fan,pipeline , heat exchanger,kiln car production, track and so on.

Step 5:Preparation before production

1. organization construction

2. Make plans and regulations

3. Maintain and add equipment

4. Clean up the existing dry site and drying supplies

5. Maintain kiln

6. Maintain electrical equipment

7. Prepare sufficient fuel

8. Preparation of auxiliary items for production

9. Construct road and drainage

10. Prepare raw materials in advance

11. Ensure safety precautions

12. Run a test

13. Prepare spare parts

Entry arrangement for overall equipment:

1. box feeder,crusher,roller screen,mixer,belt,precipitator etc in crushing workshop

2. Multi-bucket excavator, reversible spreader

3. Box feeder , mixer, vacuum extruder, cutting and transporting equipments

4. Ferry car,hydraulic pusher,return tractor and hoist.

  Q: Plasticity index of brick raw materials

The plasticity expressing in Chinas brick and tile industry is now proposed by the Swedish A. Aterberg in 1911.Plasticity index is expressed as the range of water content when the clay is in a plastic state,whose value is equal to the difference between flow limit and plastic limit.Flow limit, also known as liquid limit, is water amount that clay enters a flowing state.Plastic limit is water amount that clay can be rolled into 3mm diameter.

According to this method, the plasticity index is used to classify clay as: high plasticity clay >15%; medium plasticity clay 7%-15%; low plasticity clay<7%.

This method has been widely used for many years in the fields of soil science and engineering geology.Although China's brick and tile industry has been using it for many years, it is only for soft and dispersed clay raw materials.For coal gangue, shale, etc., which rely on reducing particle size to obtain plasticity, there is a great deal of deviation in using this method.For example, the plasticity of raw materials such as coal gangue and shale depends on crushing to reduce the particle size to a certain degree, adding water to the particles after decomposing (aging), and it is changeable during processing.If the hard clayey shale or coal gangue rich in illite is ground to a sufficiently fine degree (such as cement fineness),the plasticity index may reach a pretty high level.And formed moisture content and drying shrinkage may be larger than common clay materials, which totally differ from common brick clay.

The plasticity index of common brick clay is relatively stable.In terms of this type of material, which depends on crushing process reducing particle size to obtain plasticity, its plasticity index is variable during processing.For example, when a certain coal gangue is crushed below 0.9 mm in the laboratory, according to geotechnical test method, the plasticity index is measured as only 7.2%.However, after adding 40% of excessively fired vermiculite (essentially no plasticity),then adding water, aging, and crushing on the roller, vacuum extrusion,plasticity index of the small sample actually reached 10.5%.For example, when other shales were crushed to less 0.9 mm, the plasticity index is measured as 8.4% according to geotechnical test method.However, after adding 40% (by weight) of fly ash,then mixing with water, aging, and crushing,plasticity index of the small sample extruded by the vacuum extruder reached 9.5%.This is still the result after revalidation according to the geotechnical test method,which fully demonstrates that the current geotechnical test method used in the brick and tile industry cant correctly reflect the characteristics of raw materials such as coal gangue and shale during processing and forming.In order to further prove the fact that raw materials such as shale or coal gangue relys on reducing the particles size to obtain plasticity, the hard shale in a place near Shijiazhuang was crushed into two groups in the laboratory.One group all can pass 0.9 mm sieve; the other can all pass 0.5 mm sieve.However, the shale of the same mineral composition differs greatly in its plasticity index only due to its different grain sizes, one being 4.8% (0.9 mm) and the other being 8.9% (0.5 mm).In order to further verify this phenomenon, this two groups were blended together in different proportions to determine their plasticity index, drying line shrinkage rate and drying sensitivity index. The results are shown in the following table.

Blending ratio %


Flow limit%

Plastic limit%

Plasticity index%

Drying sensitivity index

Dry linear shrinkage













































From the above table, it can be clearly seen that the plasticity index, dryness sensitivity index, and dry linear shrinkage of the mixture tend to increase with the increase of the particle composition below 0.5 mm in the mixture.This fully shows that the use of geotechnical test method can not fully evaluate the properties of plastic materials such as shale and coal gangue that rely on reducing particle size.From the above analysis, the plasticity degree has a great relationship with the particle size of clay minerals.

For example, assuming that the type and total amount of clay minerals contained in a kind of clay are exactly the same as that in a certain type of shale, plasticity index measured by the geotechnical test method is much higher than shale,because  dispersed clay mineral particles in the clay are uniform and small.If the shale is fully crushed, so that the clay minerals in the shale reach a finely dispersed state like the clay mineral particles contained in the clay, it is possible that the plasticity index measured by the geotechnical test method will be the same as that of the clay.However, it cant be achieved in actual production,causing a great plasticity fluctuation during processing raw materials such as coal gangue and shale.Which method should be used to describe and compare the plasticity of these raw materials?

First of all, it is necessary to limit the particle size composition of this kind raw materials after crushing.According to the practice and research of bricks and tiles produced by shale in USA for many years, shale crushing can provide 0.053 mm (270 mesh) or more particles.And it is thought that shale crushed should have three levels of particle grading:(1)The decorative coarse grain should occupy 0-3% (the grain size is generally 1.2-2.4 mm, sometimes it can reach 9.5 mm. It can be used without coarse grain decoration);(2)Filled granules should occupy: 20-65% (1.2-0.3 mm, this granules part is to limit the excessive shrinkage, cracks and deformation of the granules);(3)Plastic particles should account for 35-50% (below 0.053)

This indicates the minimum of plastic particles less than 0.053 mm after comminution,whether it is shale or coal gangue. The amount of particles smaller than 1 mm, or less than 0.05 mm, which was previously proposed in the design, is a very inaccurate method.If the gangue is completely crushed into 1 mm diameter pellets, it is possible that this material will not have the plasticity for forming.Before determining materials plasticity such as coal gangue and shale, the particles content less than 0.053 mm should be measured after the raw materials are crushed, and the content of this component should be controlled over 40%.This limit value can also be used as a basis for equipment selection during plant design and basic requirements for product quality control.In addition,this type of material relying on reducing particle size to obtain plasticity, whose particle size are falling in the processing of crushing, stirring, adding water, aging, milling, vacuuming, etc., or due to particles loosening caused by water effect.Therefore,determining this plasticity should be done at the outlet of the extruder or use other expression methods,in addition to the case where the limit after the comminution is less than 0.053 mm, the particle composition is greater than 40%.Another noteworthy situation is that when crushing hard or semi-rigid raw materials such as shale and coal gangue,the particle size distribution of the crushing material is very narrow,due to improper crushing equipment or processes.The direct results are poor strength of green body, or the difficulty in molding, or the poor frost resistance of the sintered product. Because unreasonable particle distribution will cause that the particles in the green body cant reach the closest aggregation state.

  Q: Reasons and solutions of affecting bricks quality

why clay brick break, why clay brick crack ,why does brick crack?

Most of brick factory owners spent a lot of time and fianace to start their brick factories, however,not all of them get success, the reasons is that before starting clay brick factory, they did not conduct enough study and servey. To avoid investment loss for clay brick production, we have made the following summary for the common phenomenon of poor quality bricks and common mistakes the new clay brick facotry owners always make.

1, Malformed adobe, appears large cracks. In more serious cases, the whole adobe will split.

Reasons: the plasticity index of pug is too low, almost no plasticity.

Solution: to increase the plasticity index of raw materials, such as clay, coal slime or clay agent, etc.

For raw materials of low plasticity index, it can also be improved after aging, watering, stirring, rolling, extruding and other methods.

2, The body of adobe is not smooth, the obvious particles, more sand pits, and horns or flutes are missing.

Reasons: The shatter of raw materials does not meet the requirements of making bricks because there is much large particles.

Solutions: Install fine grinding equipment, as required for crushing the raw materials to make particles 3 mm or less.

Some kiln owners are not willing to spend money in equipping the machinery of raw material pre-treatment, such as roller crusher,double shaftmixers. Some kilns are only equipped with a pair of rollers, some only with mixers, some even neither of them. How can we get good bricks if there are bricks, tile, stone and other debris in the mud raw materials? Even if it is hard to send someone to pick them out clean. The fundamental way to solve the problem is equipped with auxiliary equipment.

3, The quality of adobe is unstable, sometimes good and sometimes poor.

Reasons: uneven mixing of raw materials

Solutions: Increase the mixer and feeder

Some brick factories are not equipped with rollers and mixers, even without the feeders, all by artificially feeding into the brick machine with shovel, which inevitably occurs two major drawbacks.①, raw material soil cannot be stirred and mixed well. The plasticity of raw soil is not exactly the same, and sometimes the disparity is very great, the Yellow River sludge is like that.②, the inside fuels such as coal, coal gangue, slime and others cannot be stirred evenly. The two heterogeneous, will inevitably lead to the instability of adobes’ quality.

4, malformed adobe and mud column, will spread immediately after cutting.

Reasons: Failure of the vacuum chamber

Solutions: a, improve the maintenance, service, repair technology of brick machine to ensure the normal function of brick machines’ properties. b, make the necessary technical transformation

    b, Another reason for resulting in failure of the vacuum chamber, is the sand-based raw material, so the closed mud layer of the upper auger is too thin, easy to be drawn through, causing the vacuum failure, so the adobe could not be molded. The best way to solve this problem is to change the ratio of raw materials, to increase the plasticity index of raw materials. The other way is to cut the front end of the superiors auger to 2-10 centimeters according to the material properties of soil (must be conducted under the guidance of skilled technical personnel, don’t do it by yourself).

5, Many brick cracks on adobes or broke into two sections, more wastes after sintering.

Reasons: There are too many viscous ingredients in raw materials, so the plasticity index is too high.

Solutions: change the ratio of raw materials, reduce the plasticity index. The plasticity index of clay can be up to 25, can be properly incorporated into the coal ash, slag, fly ash or waste of brick powder to make it thin.

6, Soft adobe, easy to form, or crack after cutting.

Reason: the improper control of moisture in the mud.

Solution: soft adobe, easy to be deformed, showing that the water of sludge is too much, should reduce water. If the mud column quickly occurs crack or split of mud column after molding, which is caused by too little water in mud, it can be solved by increasing appropriate water.

7. Brick production capacity not stable

Reason: Not equip with box feeder

Solution : Some brick factory owners in order to save money, they refuse to use box feeder but some labors to feed soil manually .Therefore, soil feeding amount is not stable,sometimes more than what the extruder need, some times, less what extruder need, thus greatly influencing production capacity.

All in all, there are all kinds of raw materials to make bricks, in addition to the different climate, some abnormal situations inevitably occur in the production and it is really hard to avoid. If there are problems, knowing the following two points will be easy. One isto havea team with a strong sense of responsibility and a technical team ofprofessional mechanics. Two is to timely communicate high and difficult technical problems with industry colleagues.

  Q: How many types of vacuum brick extruder based on vacuum extruding pressure?

●This equipment is for vacuum extruding and molding the products of fired common brick, fired perforated brick, fired hollow brick, hollow block and etc.

●Our extruder has three forms: soft plastic vacuum extruder, semi hard vacuum extruder and hard plastic vacuum extruder.

●Soft plastic vacuum extruder is suitable for the raw materials with moisture content higher than 19%;the allowed extrusion pressure is 0.4~1.8 MPa.

●Semi hard vacuum extruder is suitable for the raw materials with moisture content between 16%~19%;the allowed extrusion pressure is 1.8~2.5 MPa.

●Hard plastic vacuum extruder is suitable for the raw materials with moisture content lower than 16%;the allowed extrusion pressure is 2.5~4.5 MPa.

  Q: What is difference between single stage and double stage vacuum extruder

DZK series clay brick making machine is divided into Double stage vacuum extruder and single stage vacuum extruder:

1) Double stage Vacuum brick extruder can make three kinds of brick, solid brick, porous brick and hollow bricks. To produce different kinds of bricks, usually, only need to fix different brick die. It is composed of upper stage mixing parts and lower stage extruding parts;

2) Single stage vacuum extruder usually can produce solid bricks. It has only lower stage extruding parts;

You can get hollow bricks too if your soil quality is very high.

3) Double stage vacuum extruder has higher capaicty ,higher vacuum pressure than single stage vacuum extruder . Also double stage extruder green bricks contains less moisture

  Q: How our brick machine works?Can you supply video?

Yes,the following are video links, please refer to them and let us know if you have any confusion.

brick machine video, clay brick machine video, clay brick making machine video

1) Yingfeng brick machine. JZ300 4000 Indian bricks per hou clay brick making line
2) Thrust sieve for soil process for producing clay bricks
3) Yingfeng Clay roof tile press machine
4) Yingfeng Clay tile press machine ,how to produce clay roof tile
5) Yingfeng semi auto brick logo press machine
6) Yingfeng JZ250 clay brick machine in Uganda
7) Yingfeng Automatic Brick packing machine
8) Yingfeng Twice auto brick stacking machine
9) Yingfeng Auto clay block stacking robot
10) Yingfeng Auto brick sealing machine
11) Yingfeng adobe brick delivery car
12) JKR40 Vacuum extruder / clay block making machine
13) Yingfeng JKR40 Clay block machine
14) China Yingfeng JKRL45 automatic clay brick line with auto brick loading system
15) China Yingfeng JKRL35 vacuum brick making machine
16) Yingfeng JZK30 Vacuum clay brick machine
17) Yingfeng automatic clay brick cutting and loading carriers
18) Yingfeng full automatic brick Logo press machine
19) Yingfeng Auto clay brick loading carriers
20) Yingfeng NC control Hollow clay brick cutting machine
21) Yingfeng Automatic brick stacking machine
22) Yingfeng full auto brick produciton line with tunnel kiln
23) Ying Feng JZK50 with dryer and kiln

  Q: What types of brick machine can your company produce?

Our company produces non-vacuum brick extruder, single-stage vacuum brick extruder, compact two-stage vacuum brick extruder, split two-stage vacuum extruder. Customers can choose according to their own needs.

Also we supply interlock brick making machine, interlock block making machine. Cement block making machine.

You can download our brick machine details and price list on our website: www.yfbrickmachine.com

Non-vacuum brick machine series: JZ250.300, 350,400.
Single Stage Vacuum brick machine: DZK26, 28, 30,35,40,45

  Q: What wear resistant material to repair brick-tile equipment ?

How to repair clay brick making machine,how to fix clay brick making machine ?

In brick tile machine,  the parts where the soil goes through is easy to be worn out .If we do not repair

the easy wear parts timely, the production will be influeced.

But what materials we should use to repair the easy wear parts ?

Usually we use A3 Carbon steel to repair the extruder auger and liner, double shaft mixer blades etc.

However, we find that after the Carbon steel can not fit for long time wear resistant requirment. After

some time , we find that if we adopt  Fe-Cr-B wear - resistant electrode to repair auger,we get can

1.8 million green bricks while previously we only got 400,000 green bricks by carbom steel one time

repairing. The auger service life extends 4.5 times. The 2/3 repairing material cost is saved.

It is proved by pratice that adopting wear resistant material to repair easy wear parts is an effective

way to improve efficiency,extend working life and reduce cost .











Auger,mixer blades,rollers of roller crusher,blower blades




first time build-up welding

for 500 model extruder need 6 kg,thickness 2~3 mm,one time repairing need 1.5~2 Kg,

capacity 4million to 6

million green bricks





Hammer of hammer crusher







  Q: What is difference between Split and Compact Double stage vacuum extruder
Split Double stage vacuum extruder is composed of mixing part, extruding part, and vacuum system. The above mixing stage is to add and mix raw material; the lower stage is for conveying, squeezing, extruding; Such extruder takes two motors , or we can say each stage takes one motor, such extruder is called split double stage vacuum extruder.

Compared with compact double stage vacuum extruder, it has more vacuum pressure, with less adobe moisture, perfect for hollow bricks production,but with higher electricity consumption due to working with two motors.

Advantage of Split Double stage vacuum extruder:

1.Strong applicability,higher capacity,lower forming brick moisture content;
2.The raw material for making bricks can be clay,coal gangue,shale powder;
3.It can produce solid,multi-holes and hollow bricks.

  Q: What percentage of water contained in the brick can be sintered?
Less than 8% of dry brick can be sintered, if the water moisture is too large, the brick will be easy to crack at the sintering time.
  Q: If the soil contains stone, such soil can be used to make bricks?
No,the stone must be removed, otherwise the machine will accelerate wear and tear, or even damage to the machine. Generally based on the size of stone, you can choose the following machines: stone removing roller machine, roller sieve, thrust sieve.
  Q: Any kinds of soil can be used for making bricks?
Most of soil can be used for making bricks, but soil plasticity must be between 5 to 17. If the soil plasticity is too big or too small, you need to add additional material in the soil.
  Q: What’s the difference between Vacuum extruder and non-vacuum extruder?
1) Vacuum brick extruder can make three kinds of brick:solid brick, porous brick and hollow bricks. To produce different kinds of bricks by changing the different brick die;
2) Another type is the common clay brick machine, non vacuum brick extruder, can only produce solid bricks. Vacuum brick is extruded out of the vacuum extruder. And non-vacuum extruder has no extraction equipment, so the brick hardness is lower than vacuum brick;
3) The vacuum brick machine is first extracted with air and water and then fired, the production time and firing time is shorter, rapid prototyping.Greatly reducing the production cycle time.
  Q: Are you trading company or manufacturer?
We are professional manufacturer of brick making machine,our products have been exported to more than 18 countries of Asia, South Africa, and get a good reputation in the world.
  Q: Are your products qualified?
All of our machines hold the ISO, QC certificate, and each set of machine must pass a great number of strict testing ensure to offer the best quality to our customers.
  Q: How about your machine quality?
We have running brick plant in several countries, Before our machine is sent to buyer, we would make trial for our each machine 48 hours to ensure each machine quality is perfect no bug,you can completely trust our quality.
  • Contact : Mr Fengkai
  • Mobile : 0086 18638712391
  • Email : kai@zzyfmc.com
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Address:  Block 5,South Longhai Road and East Tongbai Road,Zhongyuan District,Zhengzhou City,Henan Province,China