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Method for cooling stainless steel slag in tank

A technology of stainless steel slag and cooling method, applied in the direction of improving process efficiency, etc., can solve problems such as prone to explosion, and achieve the effect of eliminating potential safety hazards

Inactive Publication Date: 2011-11-02
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cooling method draws water at a relatively high temperature. Due to the heat accumulation inside the steel slag surface and the cold crust, it is easy to explode. In order to ensure the cooling effect and eliminate potential safety hazards, it is urgent to study a reasonable stainless steel slag tank. craft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] (1) Natural cooling (stand still and air-cooled) for 42 hours, that is, the slag is discharged from the AOD furnace for smelting stainless steel, and the AOD slag is poured into 16.5m 3 In the slag tank, transport to the slag yard, and cool naturally (stand in air) for 42 hours.

[0010] (2) Boiling for 23 hours, the slag tank will be lifted to the workshop for heating and stewing for 23 hours, and the flow rate of the water nozzle is 1.2t / h;

[0011] (3) Turn over the tank, turn over the cooled AOD furnace stainless steel slag, pour out the stainless steel slag, the amount of red slag is 9.14%, and the remaining 90.86% of the stainless steel slag can be directly processed for steel slag: breaking, magnetic separation, iron recovery, Beneficial metals of chromium and nickel.

Embodiment 2

[0013] (1) Natural cooling (standby air cooling) for 38 hours, that is, the slag is discharged from the AOD furnace for smelting stainless steel, and the AOD slag is poured into 11m 3 In the slag tank, transported to the slag yard, and cooled naturally (stand still in air) for 38 hours.

[0014] (2) Stew with water for 20 hours, then lift the slag tank to the workshop for water and heat for 20 hours, and the flow rate of the water nozzle is 0.8t / h;

[0015] (3) Turn over the tank, turn over the cooled AOD furnace stainless steel slag, pour out the stainless steel slag, the amount of red slag is 8.84%, and the remaining 91.16% of the stainless steel slag can be directly processed for steel slag: breaking, magnetic separation, iron recovery, Beneficial metals of chromium and nickel.

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Abstract

The invention discloses a method for cooling stainless steel slag in a tank, which belongs to a stainless steel production process. The method comprises: discharging stainless steel slag into a slag tank, transporting the stainless steel slag to a slag field and naturally cooling (standing for air cooling) for 36 to 42 hours; hoisting the slag tank to a water pumping and hot stewing workshop, and performing water pumping and hot stewing for 18 to 24 hours, wherein the flow of the water pumping spray is 0.8 to 1.3 ton / h; and turning cooled stainless steel slag in the tank, wherein the content of red slag is reduced to less than 10 percent, and the left over 90 percent of stainless steel slag can be directly subjected to steel slag treatment, crushing and magnetic separation and favorable metals including iron, chromium and nickel are recovered. When the method is used, the cooling and hot stewing effect of the stainless steel slag is ensured, safety hazards are eliminated, the red slag content in the stainless steel slag is reduced to less than 10 percent, and direct on-line treatment capacity reaches over 90 percent.

Description

technical field [0001] The invention belongs to a stainless steel production process, and in particular relates to a cooling method in a stainless steel slag tank. Background technique [0002] In order to reduce the dust pollution during the cooling process of stainless steel slag, the cooling method in the tank is usually adopted. This kind of cooling method draws water at a higher temperature. Due to the accumulation of heat inside the steel slag surface and the cold crust, it is easy to explode. In order to ensure the cooling effect and eliminate potential safety hazards, it is urgent to study a reasonable stainless steel slag tank internal cooling. craft. Contents of the invention [0003] In order to eliminate the potential safety hazard caused by internal heat accumulation due to cold crusting on the surface of steel slag, the invention provides a cooling method in a stainless steel slag tank. [0004] The operation steps of the present invention are as follows:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/10
CPCY02P10/20
Inventor 赵鹏伟史永林罗胜高卯根仪桂兰郝万锁樊猛辉刘晋
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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