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Safety process capable of reducing explosion in hot disintegrating explosion of steel slag

A process and steel slag technology, which is applied in the field of efficient recovery of liquid intermediate metal iron in converters, can solve problems such as threatening the life safety of employees, increasing the operator's sense of insecurity, and affecting smooth production

Active Publication Date: 2013-09-04
XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The explosion of the hot stuffy device (hot stuffy pool) has seriously affected the smooth production of steel slag in various iron and steel enterprises, and even threatened the safety of employees, increasing the operator's sense of insecurity. One of the problems explored and studied in processing technology

Method used

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  • Safety process capable of reducing explosion in hot disintegrating explosion of steel slag
  • Safety process capable of reducing explosion in hot disintegrating explosion of steel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take a 120-ton converter production line as an example;

[0028] The main chemical composition (mass percentage) of liquid steel slag is composed of CaO: 45%, SiO 2 : 14%, Al 2 o 3 : 4.0%, TFe: 20%, MgO: 10%, MnO: 1.5%, P 2 o 5 : 0.6% composition; steel slag temperature: 1600°C;

[0029] Steps:

[0030] 1) After pouring 10 tons of converter liquid steel slag into the slag tank, the canned liquid steel slag poured out of the converter will be transported to the slag yard by a steel slag truck for use.

[0031] 2) Pre-load 225 kg of coke powder in the empty slag tank, the carbon content of the powder is 75%; the particle size of the coke powder is <1mm;

[0032] 3) Hoist the canned liquid steel slag by driving, tip over the slag tank, slowly add liquid steel slag to the above empty slag tank, control the adding time within 15 minutes, and add liquid steel slag at a speed of 0.9 tons / min, the chemical reaction caused by adding liquid steel slag is based on the ...

Embodiment 2

[0035] Take a 120-ton converter production line as an example;

[0036] Using the main chemical composition (mass percentage) of liquid steel slag: composed of CaO: 50%, SiO 2 : 22%, Al 2 o 3 : 5%, TFe: 26%, MgO: 14%, MnO: 2%, P 2 o 5 : 0.81% composition; steel slag temperature: 1580°C;

[0037] Steps:

[0038] 1) After pouring 12 tons of converter liquid steel slag into the slag tank, the canned liquid steel slag poured out of the converter is transported to the slag yard by a steel slag truck for use.

[0039] 2) Pre-load 270 kg of coke powder in the empty slag tank, the carbon content of the powder is 75%; the particle size of the coke powder is <1mm;

[0040]3) Hoist the canned liquid steel slag by driving, tip over the slag tank, slowly add liquid steel slag to the above empty slag tank, control the adding time within 10 minutes, and add liquid steel slag at a speed of 2 tons / min, the chemical reaction caused by adding liquid steel slag is based on the princ...

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Abstract

The invention provides a safety process capable of reducing hot disintegrating explosion of steel slag. The process comprises a first step of controlling main chemical components of liquid steel slag as follows by mass: 30-55% of CaO, 9-22% of SiO2, 0.5-5% of Al2O3, 14-26% of TFe, 6-14% of MgO, 0.6-2% of MnO and 0.4-0.81 of P2O5; a second step of loading 202-315 kg of coke powder in an empty slag tank in advance, wherein the particle size of the coke powder is smaller than 1mm, and the carbon content of the coke powder is 75%; a third step of slowly adding the liquid steel slag of the first step into the empty slag tank, wherein the temperature of the liquid steel slag is 1,580 + / -20 DEG C, an adding amount is 9-14 tons and the liquid steel slag is completely added in 15 min; and a fourth step of excavating iron-containing materials solidified at the bottom of the slag tank by an excavator when the reaction is finished, wherein the residual steel slag is subjected to hot disintegration treatment according a normal hot disintegration slag process, so that the explosion caused by CO is reduced.

Description

technical field [0001] The invention relates to the problem of sound explosion during hot stuffy process of steel slag in a converter steelmaking plant, reduction treatment of converter liquid steel slag, and efficient recovery of converter liquid intermediate metal iron. Background technique [0002] The most common risk factor in the stuffy slag process is the explosion hazard of the hot stuffy slag pool during the hot stuffy process. Explosions in the hot stuffy slag process include explosions caused by steam and explosions caused by chemical gases produced in the hot stuffy process. Among them, explosions caused by chemical gases are the most frequent and most harmful. The explosion of the hot stuffy device (hot stuffy pool) has seriously affected the smooth production of steel slag in various iron and steel enterprises, and even threatened the safety of employees, increasing the operator's sense of insecurity. One of the problems explored and studied in the treatment p...

Claims

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Application Information

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IPC IPC(8): C21B3/06
CPCY02W30/50
Inventor 俞海明梁军陆宏祖赵春辉叶晓东谭广志段建勇姜新平王瑞利胡永胜王洪林朱青松吕志刚戴大奎
Owner XINJIANG BAYI IRON & STEEL
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