SU1413077A1 - Method of sintering charge - Google Patents

Description

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The invention relates to the production of building materials and can be used in the production of white carbon from ash mixture.

i The purpose of the invention is to improve the agglomerate ka-ijcecTBa by reducing the fstatochnogo carbon content while reducing underburning and increasing pro-1.

j The method of agglomeration of the charge predominantly in the production of ash and agarite includes the preparation and filling of the moistened mixture with vertical layers of gas permeability, drying, ignition and sintering of 1IRT to the agglomeration grid with vertical interlayers, drying, ignition and sintering The layers of the additional layers of the charge are laid, and after drying of the additional layers to a relative moisture content of 1.5–4.0%, the charge is leveled off from its surface of the moistened part of the layer.

: The method is carried out as follows.

I On a sintering machine pallet, with the help of a roller stacker and a distributing device, I stack yichts with a humidity of 16%, intended for the production of ash-and-ugloporite, which includes,%: Ash. 95 Clay5

Fractional composition, charge,%: 10-20 mm20

5-10 mm55

: 0.5 mm25

The mixture is laid with the formation of vertical layers of increased permeability, as in the known method, in which the content of fractions P, 5 mm does not exceed 6%.

Then, additional bulk layers of the mixture 100 mm high are placed on the surface of the shkhta between the vertical layers.

From the charging zone, the charge is fed to the preliminary heat treatment zone, where it is dried and heated to obtain a residual moisture content of the charge in additional layers equal to 1.5-4%. When this happens, moisture is evacuated from the main layer of the charge through vertical layers, which, due to high gas permeability, are exposed to the most intense heat treatment. This accelerates education.

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about 5

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frame and at the same time contributes to the overdrying of the upper layers of the charge.

Before the ignition zone at the exit from the preliminary heat treatment zone, additional layers are destroyed, for example, with a lamelo-toothed ripper, and the mixture is distributed over the surface of the vertical interlayers and the bulk layer, exposing its moisture-containing part. This part of the wet mixture is covered with a dried surface layer.

In the ignition zone, moisture is absorbed from the layer, which increases the degree of carbon burnout, reduces surface burn-up and creates a reducing environment that intensifies the sintering process at a lower ignition temperature in the furnace (by 100–150 ° C), which contributes to lower fuel consumption.

After leveling the surface of the charge, the resistance of the layers of age. melts, the gas permeability of the entire layer is averaged and remains constant in the ignition, sintering and cooling zones.

The process of agglomeration of the mixture according to the proposed method in comparison with the known are presented in the table.

The proposed method, compared with the known use of the ash mixture, reduces the residual carbon content in the agglomerate to 0.3-0.5% versus 3.0%, reduces the return to 3-6% versus 18% and increases the specific productivity of the sintering process to 1,433-1.495 against 1.291 t / m2.h.

Claims (1)

Invention Formula The method of agglomeration of the charge mainly during the production of ash-and-grit, including the preparation and loading of a moistened charge with vertical layers of increased gas permeability to the sintering grid, drying, ignition and sintering of the charge, characterized in that, in order to improve the quality of the agglomerate by reducing the residual carbon content reduction of underburning and productivity, on the surface of the charge between 31413077 vertical interlayers place an exact moisture content of 1.5–4.0% to produce additional layers of the charge, and after leveling the mixture with the release of additional layers to dry it to the remaining surface of the moistened part of the mixture. Laying an additional layer with a thickness of 100 mm on the surface of the charge with vertical interlayers (+ yes; - no) The residual moisture of the mixture in the additional layer,% Alignment of the surface of the charge with the exposure of its moisture-containing part The specific productivity of the sintering process of the charge, The residual carbon content in the sinter (after firing),% The content of underburning (return),% Note In the compared options The charge from ash from thermal power plants with a content of 7% of unburned coal particles was used. 1.5 2.7 4.0 1,291 0.5 0.3 0.4 3.0 18