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Slag liquefaction heating process and device

A heating device and steel slag technology, applied in recycling technology, manufacturing converters, etc., can solve the problems of poor fluidity of steel slag and large fluctuation of fluidity of converter steel slag, and achieve the improvement of liquid slag temperature, volume stability, and processing. rate effect

Active Publication Date: 2011-03-09
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology

But at present, due to the influence of slag splashing to protect the furnace, the fluidity of converter steel slag fluctuates greatly, and the fluidity of steel slag in many furnaces is very poor, which cannot meet the requirements of wind crushing or water quenching, and can only be splashed hot

Method used

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  • Slag liquefaction heating process and device
  • Slag liquefaction heating process and device

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Embodiment Construction

[0010] Steel slag liquefaction heating up process of the present invention, steps are as follows:

[0011] a. Before converter slag dumping, drive the slag tank car loaded with slag tank to the slag receiving position at the bottom of the furnace and stop it. The operator checks the slag condition in the tank;

[0012] b. If the flow performance of the steel slag in the tank meets the requirements of wind crushing or water quenching, immediately drive the slag tank truck to the tank lifting position, and use the driving car to hoist the slag tank to the steel slag wind crushing line or water quenching line for treatment; if the steel slag in the tank flows If it is confirmed that the temperature needs to be raised, start the steel slag liquefaction heating device, lower the oxygen blowing spray gun, and open the oxygen valve to blow oxygen when the spray gun drops to close to the slag surface (the oxygen valve is automatically opened by the limit switch control), and the spray...

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Abstract

The invention discloses a slag liquefaction heating process and a slag liquefaction heating device. The process oxidizes low-valent iron and metallic iron droplets in the slag through blowing oxygen to high temperature liquid slag by a spray gun to release heat, raises the temperature of the liquid slag, melts slag block, improves the liquidity of the slag, benefits hot on-line treatment of the slag, improves the wind quenching or water quenching treatment rate of the slag. Simultaneously, new iron oxide is combined with f-CaO and f-MgO, so the contents of f-CaO and f-MgO in the slag can be effectively reduced to improve the volume stability of the slag and apply the slag to construction work.

Description

technical field [0001] The invention relates to a process and a device for on-line resource treatment of high-temperature liquid converter steel slag. Background technique [0002] At present, the steel slag treatment process widely used in China is hot pouring + screening, and its focus is mainly on recycling scrap steel. Little consideration is given to the utilization of waste slag (tailing slag) after iron removal. Only a small amount of tailings is used for road engineering, etc., which is of low value. A large amount of tailings is dispersed through various channels, which not only wastes resources, but also causes multiple diffusions of pollution. The main factor restricting the utilization of steel slag tailings is the existence of f-CaO and f-MgO in steel slag, which are formed at a temperature higher than that of cement clinker. They have a dense structure and slow hydration, and are easy to expand in hardened concrete. It leads to cracking of concrete works, roa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21B3/06
CPCY02W30/50
Inventor 乌力平邱艳生沈建中
Owner MAANSHAN IRON & STEEL CO LTD
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