SU1225868A1 - Method of preparing metallurgical charges for melting - Google Patents

Description

ten

The invention relates to metallurgy and can be used both in ferrous and non-ferrous metallurgy, as well as in chemical engineering processes, where roasting is used in the filter layer and, in particular, roasting of lead sulfide charges with reduced fuel content. .

The aim of the invention is to increase the productivity of roasting machines and reduce gas consumption.

Example: Lead sintering is carried out. sulfide charge. Dosed lead-containing materials and fluxing additives are mixed, rolled up, loaded into the bowl, ignited and sintered. After moving the sintering zone to a height of 100 mm (50% of the layer height) on the surface of the material through a spray device, water is given in an amount of 13 liters, and an additional fuel is dispensed by a gas (for example, 5 propane), while burning it

Secondly, 72500 kJ of heat is released per ton of material. Above the layer, the gas-air mixture does not ignite due to the low surface temperature. After treatment with intensifiers (gas-air mixture, water vapor), the sintering zone passes the unfired layer horizons, after which the sintered material is cooled by air sucked through it. The finished material is unloaded, analyzed and subjected to tests for strength and porosity.

Examples of extreme and beyond

modes are given in the table. one

15

20

The proposed method allows the most efficient use of the heat of the combustible gas, while significantly increasing compared with the known method. roasting machine capacity is 55-60% and gas consumption is reduced without reducing the quality of the material.

The proposed method allows the most efficient use of the heat of the combustible gas, while significantly increasing compared with the known method. roasting machine capacity is 55-60% and gas consumption is reduced without reducing the quality of the material.

Claims (1)

METHOD FOR PREPARING METALLURGICAL CHARGES FOR Smelting, including drying them, heating, calcining in a layer with applying a cold air-gas mixture into the layer, burning it in the middle horizon of the layer and subsequent cooling of the upper horizon, oh, t That, in order to increase the performance of firing ma-. tires and reduce gas consumption, the gas-air mixture is introduced into the sintering zone of the charge in the middle layer horizon in an amount providing heat evolution of 51000-94500 kJ, water in the amount of 9-17 liters per 1 ton of charge is supplied in front of the gas-air mixture supply zone.