EA030954B1 - Method for preparing coal for carbonisation - Google Patents

Abstract

The invention relates to a method for preparing coal for carbonisation, in which the coal is ground, the ground material is mixed with a binding agent, and a ballast (4) containing the ground material mixed with the binding agent (3) is produced. The produced ballast can be directly carbonised or alternatively further processed to a coal cake, wherein it is compressed in a mould (5) and consolidated to a block (7). According to the invention, the binding agent (3) is a binding agent that is liquid or solid over the possible temperature range, wherein tar in particular is used as the binding agent (3).

Description

The invention relates to a method of preparing coal for coking, in which the coal is crushed, the crushed material is mixed with a binder and get a loose mass (4), containing crushed material mixed with a binder (3). The resulting bulk powder can be directly coked or alternatively processed further to form a coal pie, while it is compacted inside the form (5) and strengthened to form a blank (7). According to the invention, the binder (3) is a binder that remains liquid or solid in the range of possible ambient temperatures, and in particular, a resin is used as a binder (3).

The technical field to which the invention relates.

The invention relates to a method of preparing coal for coking, in which the coal is crushed, the crushed material is mixed with a binder and a loose mass is obtained with a content of crushed material mixed with a binder.

The level of technology

With this traditional method, water is added to the crushed coal as a binder. The disadvantage is that during compaction and hardening of the crushed material with a water additive to obtain a coal cake, highly polluted wastewater is formed, which is removed at high technical costs. Even more negative in the cold regions is the fact that the crushed material mixed with water can freeze and thus eliminates the possibility for its consolidation and hardening. Accordingly, labor-intensive measures for heating the ground material become necessary. With the direct coking of the above-mentioned bulk material in the coke oven loaded from above, water as a binder is responsible, at least, for the deterioration of the energy balance.

DISCLOSURE OF INVENTION

The basis of the invention lies in the task of creating a new method of the type mentioned above for preparing coal for coking, which is technologically reliably carried out at low technical costs.

This problem is solved according to the invention due to the use of a binder that remains liquid or solid in the range of ambient temperatures.

According to the invention, preferably in the entire range of ambient temperatures of about -60 to + 60 ° C, the disadvantages of using water as a binder are avoided. In particular, the hardening of the crushed material with a binder content due to freezing is excluded. Heating measures are eliminated.

The bulk powder according to the invention can preferably be further processed to form a coal pie, compacted inside the mold and strengthened to form a preform. Preferably formed from the bulk material according to the invention, the workpiece has a particularly high resistance. Alternatively, the bulk powder can be directly coked in the corresponding furnace.

Starch, for example, can be used as a solid binder. However, viscous hydrocarbons with a high molecular weight, in particular, resins, are preferably used as the binder.

Preferably, a resin is used that is formed during the subsequent coking process.

It is advisable that when mixing the crushed material obtained from coal with a binder, in particular with a resin, agglomeration occurs with the formation of granules, while the granules consist of coal particles and a binder.

Preferably, the ground material and the binder are mixed in such a ratio and for such a time that agglomerated particles are formed from the coal particles and the binder, which do not have external adhesiveness and a negative sticking effect on the container or on the compaction devices.

In particular, mixing is carried out in such a way that the loose particles of the agglomerate acquire external stickiness only under the action of compaction pressure. Preferably, this is achieved in the subsequent processing of the loose mass into a coal pie as a result of compaction, particularly strong and uniform hardening of the coal pie. As a coal cake, a substantially homogeneous molded billet is formed.

Brief Description of the Drawings

Below the invention is explained in more detail with the help of an exemplary embodiment and the attached drawings relating to this example. In this case, FIG. 1 - granule of coal particles and resin as a binder used in the method according to the invention;

FIG. 2 is an image to explain the compaction of a bulk material consisting of granules in FIG. 1, to obtain a coal cake;

FIG. 3 is a coal pie or molded coking billet obtained from a loose mass in FIG. 2

The implementation of the invention

To obtain a friable mass, for example, coal is crushed, and coal particles with a size of up to 6 mm are formed. Coal particles are mixed with the resin as a binder, such as resin, formed during the subsequent coking of the loose mass. 90-95 wt.% Ground material accounts for 5-10 wt.% Resin as a binder.

Stirring is performed with the mixture being turned over for a period of time at which the granules 1 are formed, shown in FIG. 1, consisting of coal particles 2 and resins 3 that bind them together as a binder, while in the process of granulating resin 3 as a binder penetrates the inside of the granules 1 so that they do not have adhesive

- 1 030954 and therefore it is loose and does not form lumpiness. When granulating, particles 1 of approximately the same mass and the same size are formed.

In contrast, the bulk mass may also contain markedly different agglomerated particles or granules.

Bulk mass is able to directly coke in the top-loaded furnace. Alternatively, it can be further processed to obtain a coal pie, as described below.

According to FIG. 2 to obtain a coal cake, the granules 1 are placed in a molding box 5 filled with a loose mass 4, and compacted using a device 6, which generates static and / or impulse compression forces. Loading and compaction of the granulate in the molding box 5 is performed in the depicted example in layers.

During compaction, the binder 3 protrudes from the granules 1 to the outside and intensive bonding of the granules 1 to each other occurs, and finally the structure of the loose mass 4 in the form of particles disappears. According to FIG. 1 forms a homogeneous, composed of coal particles 2 and a binder 3, the molded preform 7 in the form of a coal pie.

Granules 1, which, as already mentioned, do not have outside adhesion, are optimally processed and do not form undesirable adhesion on the sealing device 6 or / and on the forming box 5. The resin as a binder 3 retains its effectiveness over a wide temperature range.

Claims (3)

CLAIM 1. The method of preparing coal for coking, which includes the following steps: grinding coal, mixing the crushed material with the resin (3) formed during the coking process; during the agglomeration, the resin made in the form of a resin (3) is drawn inside the agglomerated particles in such a way that they do not acquire stickiness and are free-flowing without pelletization, and the ground material and the binder the substance is mixed together in such a ratio and for such a time that free-flowing agglomerated particles (1) are formed without external stickiness, processing the loose mass to obtain coal pie due to compaction of agglomerated particles (1), which become sticky only under compaction pressure form (5) and hardening in the workpiece (7). 2. The method according to claim 1, characterized in that it forms a granulate with granules (1) containing the binder (3) and coal particles (2). 3. The method according to claim 2, characterized in that they form a granular mixture with agglomerated particles (1) of approximately the same or different size and mass. FIG. one FIG. 2 - 2 030954 I s FIG. 3