SU861403A1 - Method of agglomeration charge preparation - Google Patents

Description

(54) METHOD FOR PREPARING AN AGHLOMERATION The invention relates to preparing a mortar. dp ferrous and nonferrous metallurgy. The methods of preparing the agpomer are: t | oin shnhty, including mixing, moisturizing, oKOMKOBaime and rolling on the granules of flux and solid togative {1}. The known method of sublimation of the sintering mixture, including mixing, wetting, pelletizing with the supply of solid fuel to the pelletized charge (2J. However, the known methods do not provide optimal distribution of the flow through the height of the laid layer and its sufficient thermal activity. The purpose of the invention is to increase the quality of the agglomerate and the intensification of the specimen process. The delivered chain is comprehended by the fact that once the carbon content of the interfacial carbon H1 and the upper horizons of the layered layer is maintained at 2.0-2.5%, and the deviation from this difference by + 0.1% changes this part of the fuel to 5-l (Xf with the opposite sign. CHARTS) The method consists in introducing part of the fuel into the pelletized charge stream in the discharge part of the drum of the skimmer. When loading the charge, sintering mill With the help of an oblique reflective sheet, maternal size distribution occurs. Larger particles concentrate in the lower part of the layer, and small particles in the upper part. As a result of an increase in the proportion of tonel a. The redistribution of its content in fractions by fractions passes through the pelletizing process: fine fractions of the resin (0-3 mm) are enriched, and Kpymibte (43 mm) are combined. Thus, with a constant degree of segregation by size, which takes place when loading on the spectral carts of an agglomeration machine using a reflective sheet, the carbon of the fuel according to the proposed method is redistributed towards increasing the carbon content in the upper layers of the layer and reducing the carbon in the lower layers. The total share of the total amount introduced into the stream is 5–10%, an increase of 5-10%.

The difference in the carbon content between the upper and lower horizons of the laid layer is reduced by an average of 0.1%, which makes it possible to control the distribution of fuel along the height of the layer.

The method is carried out as follows.

The carbon content of the upper and lower horizons (50 mm from the lower and upper surfaces of the layered layer of the mixture) and the difference in carbon content between the Germans are determined. In the case of conventional injection technology, the difference in carbon content between the upper and lower horizons of the folded layer is 1.0- 1.8%. It is known that the best technological parameters of sintering sinter are achieved when the difference in carbon content between the layers is 2.0-2.5%.

To achieve the optimum difference in carbon content between upper and lower carbon

For each 0.1% C deviation from the optimal value, 5–10% of the sintering fuel should be introduced into the pelleted charge, and in the 5 process of operation, the achieved mode is maintained by changing the fraction of

fuel.

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The proposed method was tested in laboratory conditions. The original mixture was mixed and pelletized on laboratory equipment. Speckles were produced on a diameter of 225 mm. From 40 to 100% of the fuel was injected into the flow of the pelleted charge at the time of the loading part of the pelletizer. During loading, samples for carbon were taken from the lower and upper layers of the charge mixture, after which sintering was performed. The results of the experiments are given in the table.

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Claims (2)

s The best results were obtained with the difference in contained and yrneponi of the upper and lower horizons of the layer, equal to that the day of the laboratory loading device corresponded to 80% of the fuel input to the pelletized mixture. The proposed technology can find a wide iipifM “iHHe on all modern agrofactories. increase the strength of the agglomerate and increase the production of agglomeration units. The method of preparing the sinter blend, the mixing, wetting, pelletizing with the supply of solid fuel to the pelletized charge, which is due to the fact that, in the chain of improving the quality of the sinter and the intensification of the sintering process, the difference in carbon between the lower and upper horizons of the layered layer is laid. 0-2.5%, and if oT deviates from this difference, this part of the fuel changes by 5-10% with the opposite sign. Sources of information taken into account in the examination 1. The author's certificate of the USSR N 410090, cl. From 23 to 1/16, 03/22/7. 2. USSR author's certificate N 555154, cl. From 22 to 1/16, 03.12.75.