SU808472A1 - Method of agglomerate production - Google Patents

Description

(54) METHOD FOR OBTAINING AN AGGLOMERATE

one

The invention relates to the sintering of ichts, mainly from fusible aluminosilicate raw materials, such as shale rocks, and can be used in the building materials industry for the production of porous aggregate aglopornet.

A known method of producing sinter is obtained by heat treatment by sintering with compaction of the product during sintering 1.

The disadvantage of this method is that the material is compacted after a burning zone through a certain part of the layer, which prevents the complete completion of physicochemical processes during the formation of the cake from Some types of aluminosilicate raw materials. In addition, this method is inconvenient, since compaction must be carried out during the entire sintering process.

The closest in technical essence and the achieved result to the proposed method is the preparation of the sintering mixture for sintering, including its sub-pressing by subjecting the surface layer to vibration before ignition

and subsequent sintering. The charge is compacted prior to its heat treatment 2.

The disadvantage of this method is the complexity of its implementation, since it requires the use of vibration

installation.

The purpose of the invention is to simplify the method by eliminating vibration.

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The goal is achieved by the fact that in the method of obtaining agloporite on an agglomeration machine, which includes compaction of the shear layer and subsequent sintering, compaction is performed by evacuation, while under the grate screen the discharge is created by 1.5-2.5 times more. than the discharge in the process of subsequent sintering.

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The height of the layer of the mixture is 250-300 mm with an absolute humidity of 18-26%.

In addition, the charge is used.

5 follow all particle size distribution, wt.%:

Fractions 3 mm 23-30

The same 3-7 mm 52-55 7-10 mm 16-18

0 10-20 mm 2-4

By sealing the surface and creating a discharge under the layer, a high degree of uniformity of compaction of the layer over its entire cross section is achieved, which ensures a high concentration of heat in the layer during the sintering process and yield high quality products.

If during the compaction of the charge, the magnitude of the discharge under the grate to create less than 1.5 magnitude of the discharge during the subsequent sintering, then the layer structure is not sufficiently dense, leading to an increased air excess rate during agglomeration and insufficient concentration. heat in the layer, which negatively affects the quality of the agloporite.

Exceeding the discharge value in the compaction process by more than 2.5 times compared with the discharge in the subsequent sintering process leads to a layer compaction, which reduces the sintering rate and, consequently, the productivity of the sintering plant. The duration of compaction of the charge depends on the speed of movement of the grate and is for fusible aluminosilicate raw materials, such as shale, 0.5-1.5 minutes.

The drawing illustrates the process of compacting the charge, the sequence of operations involved.

Charge 1 loaded onto the moving grate 2 passes under the sealing plate 3, which adjoins the layer surface and seals it. In the area where the surface of the charge is overlapped by plate 3, a vacuum chamber 4 is installed under the grate connected to a vacuum pump 5. In this area due to the creation of a vacuum under the grate 2, for example, 600 mm water column. minutes, the charge is compacted. The compacted mixture enters the ignition zone, located under the mountain b, where the surface layer is ignited. When leaving the ignition zone, the sintered material enters the agglomeration zone, where the vacuum

under the grate is maintained equal, for example, to 300 mm water column, until the process is complete.

The results of an experimental study on the compaction of the sintering mixture of shale rock by sealing the surface of the layer and simultaneously creating a discharge under the layer with the indicated parameters showed that in this case the sintering process is characterized by the intensity of heat exchange processes with a high concentration of heat in the layer and provides a high yield of useful products. In this case, the compaction of the layer is carried out without the use of any special mechanisms, which greatly simplifies the method.

Claims (3)

1. A method of obtaining an agglomerate, preferably a17 pylorite on an agglomeration machine, including compaction of the charge followed by sintering, characterized in that, in order to simplify the process by eliminating vibration, the compaction is carried out by evacuation, with In this, under the grate, discharge is created 1.5-2.5 times more than the discharge during the subsequent sintering process. 2. The method according to claim 1, is distinguished by 5 and with the fact that the height of the layer of the charge is 250-300 mm with an absolute humidity of 18-26%. 3. The method according to claim 1, characterized in that the agglomeration is subjected to the mixture of the following particle size distribution, wt.%: Fractions 3 mm23-30 Fractions 3-7 mm52-55 Fraction 7-10 mm 16-18 Fraction 10-20 mm; 2-4 Sources of information taken into account in the examination 1.- USSR Author's Certificate No. 470534, cl. From 21 to 1/18, 1970. 2. USSR author's certificate No. 508549, cl. From 22 to 1/16, 1974.