SU1456479A1 - Method of producing sinters - Google Patents

Abstract

The invention relates to the field of preparation of ore raw materials for ferrous and non-ferrous metallurgy. The aim of the invention is to increase the yield 1 The invention relates to the preparation of ore raw materials for ferrous and non-ferrous metallurgy and can be used in the production of agglomerate by the suction method. The purpose of the invention is to increase the yield. The method is carried out in the following way. The height of the regenerative layer laid on top of the sintered charge from the sintering of the agglomerate is changed depending on the particle size distribution. The height of the regenerative layer from the sintering of the agglomerate is changed depending on the size of the material constituting this layer, providing optimal gas permeability of the layer and its thermal performance as a heat accumulator. If the regenerative layer is deposited from the screening with a grain size of 3-5 mm (100% content of this fraction), then its height is set to 15-45 mm. When changing the size of the material for every 10% abs., Reducing the fraction of 3-5 mm due to the addition of fines less than 3 mm or a fraction of more than 5 mm, the height of the regenerative layer is respectively reduced by 3.3-6.7% or increased by 2.2- 10.0%. Using these ratios according to the invention, it is easy to determine the lower and upper limits of the height setting of the regenerative layer for any particle size distribution of the material composing it. Thereafter, screening out, providing the optimal gas-dynamic parameters of the regenerative layer as a heat accumulator for heat treatment of the sintered charge. And if the regenerative layer is laid out from the screenings with a grain size of 3-5 mm, its height is set to 15-45 mm, while reducing the fraction of the fraction to 3-5 mm by adding fines smaller than 3 mm or a fraction of more than 5 mm, the height of the regenerative layer is reduced by 3 3-6.7% or increase by c «b (L CZ bn; o

Description

2.2-10.0%. On every 10% abs. Reducing the fraction of 3-5 mm.

Using the proposed method, it is easy to determine the lower and upper limits of the height setting of the regenerative sloch in the case of using for its formation screening of agglomerate with any particle size distribution. For example, as the material of the regenerative layer, the sintering of the agglomerate of the fraction minus 15 mm is used, which has the following granulometric composition (corresponds to the fractional composition of the sifting used for the bed):

Fractions, mm: -3 3-5. +5

Content

fractions,%: 17.5 37.5 45.0

According to the proposed method, the lower limit of the height of the regenerative layer is set to 20.9, and the upper limit is 44.2.

This method allows additional heat input to the layer without reducing the oxygen content in the gas to be sucked. Adjusting the height of the regenerative layer depending on the size of the agglomerate constituting it allows at the same time maintaining the gas permeability of just 10 total layers of material and realizing the properties of this layer as an accumulator and heat regenerator.

Invention Formula

15

Method of sinter production

including inclusions laying on the charge of the regenerative layer from sifting-out of the agglomerate fraction minus. 15 mm, its heating, ignition and sintering of the charge with the gas from the top downwards are different, and so that, in order to increase the yield, the height of the regeneration layer is changed depending on the 25 ° ° granulometric pine layer is set to within the bounds of, with a content of 100%

21-44 mm fractions 3-5 mm regenerative height Using the invention of the allowable layer is set equal to

It does not increase the yield, that we can-15-45 mm, reducing it by 3.3-6.7%

but to use it to increase production by 2.2-10.0% for every

the water content of the sintering system is 10% of the absolute decrease in the fraction of sandstone. Additional heating of the speciation 3-5 mm, respectively, due to

mine layer due to heat, accumulated additive fractions minus 3 mm and plus

go in the regenerative layer at the time of 5 mm.

This method allows additional heat input to the layer without reducing the oxygen content in the gas to be sucked. Adjusting the height of the regenerative layer depending on the size of the agglomerate constituting it allows at the same time to preserve the gas permeability of the total 0 total layer of material and to realize the properties of this layer as an accumulator and a heat regenerator.

Invention Formula

five

Method of sinter production

including inclusions laying on the charge of the regenerative layer from sifting-out of the agglomerate fraction minus. 15 mm, its heating, ignition and sintering of the charge with the gas from the top down, is also different because, in order to increase the yield, the height of

Claims (1)

Formulas a invention 15 A method for the production of sinter, including laying on the charge of the regenerative layer from the screening of the sinter fraction minus. 15 mm, heating it, burning and sintering the mixture with gas suction from top to bottom, distinguishing it by the fact that, in order to increase the yield, the height of the regenerative layer is changed depending on its particle size distribution, while at the same time containing 100% fraction 3-5 mm the height of the regenerative layer is set equal to 15-45 mm, decreasing it by 3.3-6.7% and increasing by'2.2-10.0% for every 10% of the absolute decrease in the fraction of the fraction 3-5 mm, respectively due to the addition of fractions minus 3 mm and plus 5 mm. Compiled by L. Alexandrov