Press for coal briquettes. Equipment for briquetting coal dust. Briquetted coal - what is it?

While various wood wastes in the form of sawdust and wood chips are quite easy to burn in long-burning boilers specially adapted for this, the situation is different with fine coal and dust. Anyone who has ever tried to fire a stove or boiler with small fractions of coal knows that half of the fuel is wasted, spilling through the grate into the ash pan, and the other half is sintered and blocks the access of air to the firebox. Because of this, the intensity of combustion is sharply reduced. At the same time, it is stupid to throw away such fuel, because it contains a lot of thermal energy. In such a situation, coal briquetting can help, which will be discussed in this article.

About coal briquetting technology

One way to burn coal fines is to light a boiler with wood, and then pour the dusty fraction of fuel on top of the burning logs. But this is too troublesome, since coal dust must be added in small portions, and therefore often.

If you load a large portion, then some of the fuel will definitely spill into the ash pan and go to waste, and the rest of the fuel will fill the cracks between the wood. Air will stop flowing into the combustion zone and, as a result, the firebox will begin to fade.

The best way is to use the pressing method to form briquettes from the fine fraction, which then burn very well, releasing a large amount of heat. Such a solution as coal briquetting was proposed at the beginning of the century before last in Russia by the inventor A.P. Veshnyakov is still successfully used both for industrial purposes and in everyday life. Its essence is that the compaction of fine coal using high pressure on special equipment makes it possible to obtain fuel whose calorific value is no less than that of high-quality coal.

Without going deeply into the intricacies of the technological process and the classification of different brands of fuel, we note that such briquettes are produced in two types:

• with binders for industrial purposes;
• without binders, intended for combustion in domestic boiler systems.

Note. Briquettes pressed with binders cannot be used in everyday life. When burned, these substances form harmful or toxic compounds, which are captured in industry in various ways. Previously, starches or molasses were also added to household fuel as binders, but this technology is outdated.

Since we are interested in the technology for producing coal briquettes without any additives for household purposes, it is worth considering this. So, the sequence of the process is as follows:

• first, the coal undergoes a grinding operation, with a maximum fraction size of 6 mm allowed;
• the next operation is drying in order to achieve an optimal humidity of 15%. For this purpose, special equipment is used for the production of coal briquettes - steam or gas dryers;
• After drying, the composition is cooled and supplied for pressing. The operation takes place at a pressure of 100-150 MPa in the so-called stamp press;
• final cooling and shipment to the warehouse.

Note. The traditional technological process is described here, but the requirements for the fraction size and moisture content of the raw materials may vary depending on the equipment used. For example, a modern mini-plant of the Russian company UNITEK requires particle sizes of up to 0.25 mm with a moisture content of 6 to 16%. That is, in this case, the coal briquetting technology should provide for better grinding, but the pressing pressure is applied much lower.

The output is a coal briquette whose ash content does not exceed 15-20%, the maximum permissible mechanical load is 3 kg/cm2, and when dropped from a height of up to 2 m, the product loses no more than 15% of its mass as a result of impact. The heat of combustion depends on the grades of coal from which the briquette is pressed.

Making coal briquettes at home

It is clear that industrial equipment for coal briquetting is inaccessible to the average homeowner due to its high cost. However, our grandfathers also knew how to make briquettes without any equipment. To do this, coal dust and crumbs were mixed with water in such a ratio that a thick mass was obtained, and then cakes were molded from it by hand. After drying, such products were successfully burned in a home stove. That is, contrary to production technology, the mixture for the production of coal briquettes is not dried, but, on the contrary, moistened.

At home, briquettes are made in 2 ways:

• using a hand press;
• on a homemade screw extruder.

The first method is good because you can buy a pressing machine inexpensively or make it yourself. Its disadvantage is low productivity; in order to make yourself a fuel briquette for the whole season, you will have to work very hard. In the second case, briquetting of coal dust occurs quite quickly, since the entire process is mechanized. But here the cost of the unit comes to the fore; even a homemade installation will require significant costs. You will need to purchase a powerful electric motor, gearbox and other parts.

The algorithm according to which you can make coal briquettes yourself is as follows:

• You must try to grind the coal chips in any available way. The smaller the fraction, the better the quality of the product;
• mix the resulting composition with water. It is not possible to indicate exact proportions, since they depend on the dust content. The main thing is that the mixture is very thick and molded by hand. There is no need to add clay, this will only increase the ash content;
• fill the mold with the composition and operate the manual mechanism;
• Remove the briquetted coal from the mold and leave to air dry.

As a result, we get fragile products that are unsuitable for transportation, but burn well in the stove. One of the ways to briquet coal at home can be found by watching the video:

When a screw press is available, production is greatly simplified and accelerated. Turning on the electric motor, the above mixture is loaded with a shovel into the receiving hopper of the extruder. The output is cylindrical “sausages” of excellent quality. It is worth noting that such briquettes made from coal dust have good strength and can even be transported.

For more information about the operation of the extruder, watch the video:

Conclusion

Of course, home-made briquettes are far from ideal. They have low density and high humidity, and therefore provide less heat than factory products. However, in a stove or boiler they burn well, it’s not like burning coal dust that bakes into a cake. And in terms of cost, homemade coal briquettes will be cheaper.

Ordinary sawdust and wood chips can be burned in boilers made for this purpose, but with coal dust it is not so simple.

Those who have already tried to heat their boiler with such fuel understood that half of it simply disappears, falling between the grate rods into the ash, while the second half is sintered into stone and prevents the burnt fuel from getting into the ash. All these reasons lead to a decrease in the quality of combustion, and therefore heat transfer.

But on the other hand, throwing away coal dust is, to say the least, stupid; it contains a large amount of energy. And here the problem can be solved by turning coal into briquettes, which we will talk about below.

More about briquetting technology

A number of parameters are used to classify fuel briquettes:

• material from which the briquette is made;
• form;
• security;
• environmental friendliness;
• type of packaging.

You can, of course, burn such dust by first heating the boiler with wood, and then pour the fine fraction on it.

But this approach is not a solution; it is very troublesome, because you need to add coal dust little by little, which means often.

If you immediately put a large amount of coal dust on the firewood, it will still spill into the grate and thus, the problem of partial combustion of fuel will not go away, besides, the rest of the dust will fall between the firewood, block the flow of air and the combustion will be significantly weakened.

To circumvent all of the above inconveniences, you need to press coal dust into briquettes, which in this form will burn perfectly, releasing all their energy.

Russian developments

The solution for pressing the fine fuel fraction was invented at the beginning of the last century by Russian researcher A.P. Veshnyakov. His idea is still used in industry and everyday life.

The essence of the idea is to press wood powder into solid elements that can burn and give off heat no worse than coal itself.

• Without talking about detailed technology and without listing their types, it can be noted that they come in two main types:
• using binding components, industrial combustion;

without them, for home use. It is important to know:

briquettes made using technology that involves the use of matching elements cannot be used in everyday life. When they burn, many toxic substances are released, which are removed by special equipment during production.

• We are talking about the technology of producing briquettes without the use of binding components. Production proceeds as follows:
• Then the mixture is dried to a moisture content of 15%. For this purpose, steam and gas type dryers are used;
• Then the dust is cooled and transferred to the press. Its effect on the fine fraction occurs with a pressure of 100 to 150 MPa, in a special stamp-type press;
• after which the finished products are sent for storage.

Requirements for particle size and compaction pressure may vary depending on the equipment used and the purpose of the fuel. For example, the UNITEK production line works with particles up to 0.25 mm and their humidity from 6 to 16%.

As a result, we obtain a product with an ash content of 15-20%, capable of withstanding a pressure of -3 kg/cm, and when dropped from a two-meter height, the loss of weight from the impact will be insignificant. The energy intensity of briquettes will depend directly on the coal dust from which they are made.

Industrial production

For the production of industrial briquettes, the following binders are used:

• oil bitumen mixture;
• cement;
• lignosulfonate additives;
• liquid glass;
• molasses.

To process small particles of coke and some other types of coal, cement and also liquid glass are often used. Such materials are used mainly in metallurgy, where the use of these substances is permitted.

Coal tar with petroleum bitumen is also used for the production of industrial coal briquettes. They cannot be used to heat residential buildings, as they release large amounts of benzopyrene and other toxic elements prohibited by the SES.

Home production

In order to make coal briquettes with your own hands, you need to have coal dust itself and clay, a safe binding element. By adding a little water, the dust and clay are mixed 10:1, so the solution acquires the desired consistency. It is very important to mix the substances thoroughly.

To create briquettes, you can use either a regular construction mixer or special equipment, such as the Weber brand. If you decide to make briquettes by hand, you can use any containers, boxes, pans, etc. as a form. At the end of production, the fuel briquettes must be dried.

Note: using equipment to create briquettes at home will be unprofitable.

Naturally, briquettes made at home are not ideal. Their strength is not as great as that of industrial analogues, they have different humidity and heat transfer.

But be that as it may, they burn perfectly in the boiler, much better than coal dust that bakes and falls through. And the cost will certainly please them. The positive reviews left about this technology speak for themselves.

How to produce coal briquettes, see the following video:

Content

Affordable price compared to other types of energy resources, no problems with purchase, good heat transfer are the main reasons why many users prefer to use coal briquettes for heating. The price of more conventional energy sources is constantly increasing, which forces us to look for alternative heat sources. Coal dust is an accessible type of fuel, but its use in its pure form is unprofitable: half of the raw material falls into ash through the grate bars, and the other half is sintered, which leads to clogging of the firebox.

Coal briquettes

One of the options for using coal dust, which allows you to get maximum heat from it, is to pour the fraction on firewood, which is used to pre-heat the boiler. But this is very troublesome, since it needs to be poured often in small portions. Adding a large amount of fines will lead to the fact that it will still spill into the ash pan, turning into waste. And the part that still remains on the wood will fill the gaps between them, blocking the air circulation and causing the firebox to fade.

The solution is to produce briquettes from dust with the addition of auxiliary substances by pressing. The fine fraction processed in this way burns well with high heat transfer.

More about briquetting technology

At the beginning of the last century, Russian researcher A.P. Veshnyakov proposed pressing the fine fraction into elements of a certain shape and size, which in terms of heat transfer were not inferior to the coal itself. The idea has found wide application both in everyday life and in industry.

Today, pressed coal is classified depending on the material, environmental friendliness, security, shape and type of packaging. But the two main types are:

• For production with the addition of binding components.
• For home use without additives.

It is important to know that industrial briquettes should absolutely not be used in everyday life. When they burn, a large amount of toxic substances are released, for which special equipment is responsible for removing them under production conditions. Previously, additives in the form of molasses or starch were used in the production of household briquettes. But this technology is a thing of the past.

Industrial production

Distinctive features of dust and fine coal fraction: low specific calorie content and density. But these materials are considered as cheap raw materials that make it possible to organize the production of coal briquettes. The products will have good density and heat transfer at low cost.

To produce briquettes in a factory, a special production line is used, consisting of a crusher, dryer, and press. The movement of semi-finished products between machines is ensured by a conveyor belt.

Pressed coal without additives is produced in several stages:

• Grinding raw materials to a particle size of 6 mm and smaller.
• Drying the mixture to 15% humidity using steam and gas dryers.
• Next, the dust is cooled and fed to a stamp-type press, which acts on the mixture under a pressure of 20-150 MPa (depending on what technology is used). After this processing, the finished briquettes are sent to the finished product warehouse for storage.

The purpose of the fuel and the equipment used are the main factors influencing the size of the particles, the level of humidity and the amount of pressure under which they are turned into briquettes. At the same time, the energy intensity of the finished product directly depends on the quality of the raw materials. It is important to use the fine fraction of anthracite, and not brown or other types of coal. For strength, it is permissible to add mineral or organic additives.

Coal briquettes can be compressed in two ways depending on what briquetting equipment is used:

• Stamp press. The heated coal mixture is filled into special molds, in which it is compressed with a force of 100-120 MPa. After cooling, the briquettes are packaged. The finished product looks like bricks or cylinders with holes, and may look like “tablets” or “pads.” This manufacturing method is suitable for the production of briquettes in large quantities due to the high energy and financial costs.
• Extrusion machine. In this case, the plastic coal mass is pressed through the matrix by a press. A screw-pressed briquette (pini-key) made from coal dust has a cylindrical shape, resembling a “sausage”, with a calibrated hole in the middle. The technology is less expensive, but also less productive.

The technology for producing briquettes for industrial use involves the addition of cement, oil-bitumen mixture, liquid glass and others. The use of these substances in metallurgy is permitted. But you cannot buy coal briquettes with oil bitumen for heating a living space according to the requirements of the SES.

Briquetting coal at home

Industrial technology is not suitable for briquetting coal at home. The high price of equipment for the production of coal briquettes, high energy costs, and the need to obtain a huge number of permits from government agencies significantly increase the cost of the finished product. But for the purpose of heating a small private house, there is no need to organize large-scale production. To make 3-4 tons of briquettes (winter stock), it is quite possible to make do with improvised means.

The simplest method, which was well known to our great-grandfathers:

• Coal dust is mixed with clay in a ratio of 10:1 with the addition of a small amount of water to form a thick mass. Clay is a safe binding component that will prevent the briquettes from falling apart. It is important to thoroughly mix all the components of the mixture. A construction mixer is often used for this purpose.
• Next, the solution is poured into molds. These can be either special containers or used equipment (old pots, buckets, boxes). If there are no containers, coal cakes can be formed by hand, as our ancestors did.
• After complete drying, the briquetted coal can be sent for storage.

Despite the fact that, according to production technology, the mixture is dried, during the home preparation of briquettes the mixture is moistened. In this case, homemade coal briquettes have the following distinctive features:

• Imperfect shape.
• Different levels of humidity and, therefore, heat transfer.
• Low strength, which does not allow briquettes to be transported.

But these properties do not prevent low-cost products from burning well, especially compared to sintered dust. This option is much more convenient and practical.

And if you still want to automate the process somehow, then you can follow the example of home craftsmen and independently make equipment similar to production equipment:

• A machine that allows you to make briquettes manually. Instructions on how to make a machine can be easily found on the Internet. A unit designed for home brick production is well suited for manual pressing. The materials that allow welding the frame are a profile pipe and a 40*40 mm corner. A receiving hopper is mounted on top. A manual mechanism is attached to the side for briquetting the mixture into rectangular or cylindrical products. Technology:
  • The raw materials are crushed as much as possible. The fine fraction ensures the strength and quality of the briquette.
  • Adding water will create a sticky mixture. It is acceptable to add clay in small quantities to slightly increase the ash content of the fuel.
  • Next, the mixture is poured into a hopper, from where the mold is filled. The briquette is extruded by pressing a lever.
  • The reverse movement of the lever causes the briquette to be pushed out of the mold. It is removed and placed in the sun to dry.
• Screw press, where products are briquetted by extrusion. In this case, the financial costs of assembling the machine, as well as its productivity, will be greater. You will need:
  • Thick-walled steel pipe for making the body. It is machined inside according to the desired screw size.
  • Auger made from high-strength carbon steel.
  • A matrix with one or more holes made of the same material.
  • Electric motor with a power of 4 kW.
  • Belt drive (minimum 3 belts).
  • Reception bunker.

It is better to entrust the manufacture of the body, matrix, and auger to a good turner. It is important that the pulley diameters ensure a screw rotation speed of no more than 200 rpm. The motor must be grounded before connecting it to the household electrical network.

Production technology:

• The raw materials are crushed and mixed with water.
• With the engine running, the mixture is loaded into the hopper.
• The emerging “sausages” are cut into pieces of the desired length and laid out on a rack to dry.

It is important to know that the presence of through holes in finished briquettes promotes better combustion and greater heat transfer.

conclusions

If you believe the manufacturers of coal briquettes, the calorific value of this type of solid fuel is even greater than that of other varieties. Theoretically, this statement may be quite realistic due to the fact that only by burning 1 kg of anthracite can 7.7-8 kW be obtained. In terms of specific heat, firewood and wood briquettes lag significantly behind, releasing only 5 kW/kg.

However, an analysis of reviews from owners of solid fuel boilers on thematic forums shows that the demand for coal dust briquettes is lower than for wood for several reasons:

• With their help, it is difficult to light a boiler and when burned, coal gives off little heat.
• Before and during combustion, an unpleasant odor remains in the room.
• Briquettes lose their shape and crumble heavily during transportation.
• Lots of ash.

A large number of negative reviews (about 70% of the total) can be explained by the fact that manufacturers use low-quality raw materials in order to make more profit. They briquet charge, sludge and other types of coal that are unsuitable for heating premises, and add extra substances to the mass. Briquettes truly made from anthracite are difficult to find. The main feature is the deep black color of the products.

The conclusions are obvious:

• It is better to make coal briquettes yourself.
• For production it is necessary to buy high-quality raw materials.
• If it is possible to purchase only low-calorie grades of coal, pressing is not economically feasible. Although burning low-quality briquettes along with firewood will reduce heating costs.

Yes, home-made coal briquettes are very different from their factory-made counterparts: they crumble during transportation, are wet, and produce less heat. But this way you can control the quality of the raw materials used, the presence and quantity of additives. Both in a boiler and a stove, “homemade” briquettes burn well, much better than dust, which is simply baked into a cake. In addition, in terms of price, homemade cylinders, bricks or “sausages” are much more profitable.

Our company produces a whole line of screw (extruder) presses of the PBE series of varying power and productivity. Depending on the type of raw materials, size and power of the equipment, productivity can reach 10 tons of finished products per hour per press. It should be noted that with the help of presses of this design, it is possible to briquet almost any fine-grained and bulk materials, if, when preparing the raw mixture, binder additives are used, which, after drying and cooling the resulting briquette, determine its quality, strength and its resistance to external influences.

But there is a fairly long list of materials and substances that are briquetted in screw presses without any additives. It’s just that such materials already contain substances that are released from the material itself and become plastic during the process of strong compression and under the influence of high temperature. They perform the function of a natural glue that connects particles of raw materials when forming a briquette. Strong compression and high temperature are achieved through the operation of a screw when feeding raw materials into a conical chamber, where compaction occurs, and subsequently extrusion of the briquetted mass through a molding die.

For such materials, the main requirement for obtaining high-quality briquette products is fineness, which is either a natural property of the raw material or is achieved by grinding and crushing on appropriate equipment. It is enough to thoroughly mix such fine-grained raw materials with water until they form a homogeneous plastic mass and the mixture for briquetting is ready. Using PBE presses without the use of binding additives, the manufacturer obtains high-quality briquette products from materials such as fossil coals of grades B, D, G, Zh, K, peat, hydrolyzed lignin, sapropel, animal manure, bird droppings, chalk, lime.

For such production, our company also produces all the necessary additional equipment. These are crushers, mixers, dryers, coolers, etc.

* - productivity depends on the density of the material (peat - 500 kg/m3, coal - 1500 kg/m3)

** - installation is carried out in agreement with the customer

The screw (extruder) press is one of the main types of equipment offered by the Sodrugestvo company. The screw press is the main element of the line for the production of fuel briquettes, and therefore today it is in great demand in various branches of the manufacturing and agricultural sectors. And especially if this equipment meets international quality standards. The Sodrugestvo company has been working in the production of equipment for industrial and agricultural enterprises for many years. And the quality of the products it offers has been tested by the experience of many representatives of this sector of the economy.

To keep up with the times, the company’s employees are constantly mastering new types of equipment for briquette production, including screw presses of varying power and productivity. The company is constantly working to introduce new technologies for the development and maintenance of the equipment life cycle. This makes it possible to increase the service life of equipment, as well as improve the quality of manufactured products, including equipment for the production of fuel briquettes. At the same time, it is worth noting that the quality of the equipment we offer is close to European, while the prices remain Russian.

The screw presses and additional equipment we offer for the production of briquettes are capable of producing products from various types of industrial and plant raw materials: coal dust of various grades, peat, sapropel and other types of raw materials with sufficient lignin content. In the process of preparing raw materials, there is no need to use any additives as a binder. Lignin itself acts as a natural “glue”. Mandatory conditions for obtaining high-quality briquettes using this technology are a fine fraction (0-5mm) and the required moisture content of the raw materials. The fine fraction is obtained using a crusher. And the humidity is regulated by drying or vice versa by adding water and thoroughly mixing in a forced mixer.

But we won’t talk much about all the advantages that equipment for the production of fuel briquettes has. After all, it is best to check this on your own experience. Convince yourself of the advantages of the equipment of the Commonwealth company, which can become a reliable partner and supplier of equipment for the production of fuel briquettes for your company. The company's employees will manufacture equipment in accordance with your requirements, and will also share many years of invaluable experience.

All equipment for the production of fuel briquettes, including the screw (extruder) press, is manufactured by the Sodrugestvo company taking into account fire safety requirements. All equipment offered by Sodrugestvo is provided with a quality guarantee, and a full range of post-warranty equipment maintenance is provided.

Coal briquetting technologies are designed to produce commercial products from coal dust, screenings, substandard and low-quality coal. Black or brown coals, as well as coke, can be used as raw materials.

Coal briquetting is a very old technology that was developed using double-roller roller presses, which increased productivity and qualitatively improved the economic attractiveness of this business.

SAHUT-CONREUR was one of the companies that began producing double roller presses at the beginning of the 20th century. We are located in northern France and, since the beginning of the 20th century, have installed more than 1000 briquetting plants in different parts of the world, of which more than 350 are for briquetting coal screenings.

The technology of coal briquetting on roller presses was developed to produce briquettes from fine coal coming after coal screens and washing. Briquettes are intended for use as fuel for private or industrial boiler houses in the same way as conditioned coal, and are also packaged for retail sale and in this form can be exported.

In most cases, the process of coal briquetting occurs with the addition of a binder (coal pitch, petroleum bitumen, tar, molasses and lime, lignosulfonate, starch, polymers...). In some cases, briquetting is also possible without a binder.

ADVANTAGES OF BRIQUETTED COAL

Technical solution:

• Receiving a product of the same size, volume, shape and weight.
• Elimination of the problem of dust formation and defects during transportation.
• Specified hardness and strength of the briquette.
• Recycling waste into commercial products

Consumer and marketing benefits:

• Higher energy value
• Longer burning
• Ash in powder form
• Less CO2 and sulfur emissions
• Easier packaging, transportation, storage
• Ready for automatic feeding into the firebox
• Possibility of packaging for the consumer market
• Export supplies

COAL BRIQUETTING WITHOUT BINDER

The binderless coal briquetting plant consists of the following components:

The capacity of a coal briquetting plant without binder can range from several tons per hour to approximately 25 t/h.

BRIQUETTING COAL WITH BINDER

The plant for briquetting coal with a binder consists of the following sections:

• coal sorting and grinding area if the coal size is too large
• drying area if the moisture content of the coal is too high
• binder addition area
• briquetting area on a two-roller press
• (optional) post-processing area (cooling, ripening and drying depending on the binder used)

The capacity of a plant for the production of briquettes from coal with a binder can range from several tons per hour to 100 t/h for large presses.

Possible binders

• coal pitch
• petroleum bitumen
• resin
• molasses and lime
• lignosulfonate
• starch
• polymers, etc.

The specific binder for charcoal briquettes is determined by regional availability and end product requirements. The optimal proportions of the binder and the parameters of the finished briquette are determined by testing coal in France at the Sahut-Conreur pilot plant.

Testing of raw materials and binders for coal briquettes

Coal in each specific deposit has individual chemical and physical characteristics, and different binders may be available in each region.

To accurately determine the required composition and characteristics of the equipment, it is necessary to conduct preliminary testing of the customer’s material at the manufacturing plant of Sahut Conreur SA in France. To conduct tests, the customer needs to send coal to France for testing.

As a result of the tests you will be able to:

• determine the required composition and characteristics of the equipment
• determine the type and proportions of the binder
• obtain a finished briquette and determine its characteristics
• calculate accurate economic indicators of production

Also, only through testing is it possible to determine whether coal is suitable for briquetting without a binder and what the technical and economic indicators of production will be in this case, as well as the quality characteristics of the briquette.

COMPARISON OF OPTIONS for coal briquetting with and without binder

Coal briquetting using a binder:

• + Suitable for any hard or brown coal
• + High productivity (up to 100 t/h)
• +
• + Possibility of obtaining moisture-proof briquettes
• + Low cost of consumables
• - More expensive and complex equipment; binder required

Briquetting coal without binder:

• - Applicable only to certain coals
• - Drying is required
• - Limited capacity (up to 25 t/h)
• - High specific energy consumption
• - High cost of consumables
• + No binder, simpler and cheaper equipment

The technology of coal briquetting without binder additives seems more attractive at first glance, however, at the same time, energy costs increase significantly, and the productivity and quality of the briquette decreases.

After testing, it usually becomes clear that briquetting using a binder is more economically justified, even taking into account the costs of purchasing, delivering and storing these materials.

Stages of the technological process of coal and coke briquetting

Grinding coal in a hammer crusher

Grinding of coal is necessary to obtain the required homogeneous fraction, therefore, before or after drying, the coal is passed through a hammer crusher.

Drying coal in a drying drum

Drying is necessary to reduce the moisture content of the coal before adding the binder. The degree of drying depends on the binder used and technology. The final product has a moisture content of 5-10%.

Pressing of crushed coal and coal dust

Pressing of coal dust and crushed coal fraction is carried out on two-roller presses that meet industry requirements:

• High performance
• Low specific energy consumption
• High reliability

Our partner is the world leader in the production of this equipment, the French company "Sahut Conreur".

Post-processing (maturation) of coal briquettes

Depending on the type of coal and binder in the technology, it may be necessary to specially cool and keep the finished briquette for some time in special bunkers, during which the briquette acquires strength.

The holding time is individual and determined at the testing stage.

If you are interested in the technology of producing coal briquettes, we will be happy to answer