Method for separating slag from powder in primary treatment and secondary treatment processes of stainless steel slag

Abstract

The invention relates to a device for separating slag and powder in the primary treatment and secondary treatment processes of stainless steel slag. The device comprises an air supply system, a slag turning mechanism, a fine powder settling chamber, a fine powder conveying device, a fine powder dust collecting chamber, a pipeline device and an air purifying and exhausting device. The stainless steel slag is cooled in a pulse air cooling mode, so that the steel slag is self-pulverized more thoroughly, the working environment of workers is improved, and air holes or spraying holes can be prevented from being blocked by fine powder flying dust; the dust collection pressure is reduced, the wind resistance is reduced, and the dust collection efficiency is improved; and a branch pipe of the fluegas exhaust device is adopted, so that the property of pulse blowing air can be adjusted as required.

Description

technical field [0001] The invention relates to the technical field of slag treatment in metallurgical processes, in particular to a treatment method for stainless steel slag, and in particular to a method for separating slag powder during the primary treatment and secondary treatment of stainless steel slag. Background technique [0002] Stainless steel is a kind of corrosion-resistant steel. In the stainless steel smelting process, it is necessary to control the content of C, S, P and other elements to improve the physical and chemical properties of stainless steel. Therefore, it is necessary to add alkaline slag during the stainless steel blowing process to reduce The activity of SiO2 in the slag and the recovery rate of Cr are improved; the production of stainless steel per ton will produce about 270Kg of slag; the stainless steel slag will expand and produce powder as the temperature decreases from the molten state to the cooling process, so that A large amount of dust ...

AI Technical Summary

Problems solved by technology

It is still difficult to avoid the disadvantages of dust and high temperature when the fine powder is discharged, which increases the difficulty of the subsequent process.

[0005] Vibration screening, grinding, magnetic separation and other processes are often used in the secondary treatment process. The dust is large, and because a large amount of powder enters the next step, the efficiency of grinding and iron selection is affected, and energy consumption is increased.

However, the sealing device 3 it uses is a pit, so there are problems such as large equipment and insufficient mobility

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