Method for treating stainless steel smelting slag

A treatment method, stainless steel technology, applied in the field of stainless steel smelting slag treatment, can solve problems such as explosion accidents and difficult slag cooling effects, and achieve the effects of preventing explosion accidents, optimal cooling effect, and guaranteed cooling effect

Inactive Publication Date: 2008-12-31
SHANGHAI NO 1 IRON & STEEL CO LTD BAOGANG GRP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, the existing stainless steel smelting slag treatment method is to turn the slag at a certain time. Since the amount and composition of the hot slag contained in the slag pots are not the same, it is difficult to achieve the standard cooling effect of each pot of slag, so it may be Explosion accident occurred during slag turning

Method used

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  • Method for treating stainless steel smelting slag

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Effect test

Embodiment 1

[0013] Use 17M 3 The slag tank is filled with hot stainless steel slag, lifted to the open-air cooling field, and left to cool naturally in the air. Generally, after 16-20 hours of air cooling, the temperature of the tank wall is intermittently measured. When the highest temperature of the tank wall is 170°C or 160°C When the temperature is even lower, use a spray gun to spray water directly on the surface of the steel slag in the slag tank continuously. After natural cooling, the temperature of the slag is greatly reduced, that is, there is no molten slag, and the cooling can be increased. Water flow rate to speed up the cooling of hot slag, so water can be continuously added until 100mm of water accumulates above the steel slag in the slag tank, and the temperature of the tank wall is measured after standing still. If the highest temperature of the tank wall is higher than 90°C, the water above the steel slag evaporates quickly Make water replenishment before, until 100mm of...

Embodiment 2

[0016] use 6M 3 The slag tank is filled with hot stainless steel slag, lifted to the open-air cooling field, and left to cool naturally in the air. Generally, after 10-14 hours of air cooling, the temperature of the tank wall is intermittently measured. When the highest temperature of the tank wall is 170°C or 160°C When the temperature is even lower, use a spray gun to spray water directly on the surface of the steel slag in the slag tank continuously. After natural cooling, the temperature of the slag is greatly reduced, that is, there is no molten slag, and the cooling can be increased. Water flow rate to speed up the cooling of hot slag, so water can be continuously added until 100mm of water accumulates above the steel slag in the slag tank, and the temperature of the tank wall is measured after standing still. If the highest temperature of the tank wall is higher than 90°C, the water above the steel slag evaporates quickly Make up water before, until 100mm of accumulated...

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Abstract

The invention discloses a treatment method for stainless steel smelting slag, comprising three technologic steps: air cooling step; spraying, dipping and cooling step; as well as slag dumping step. Compared with the existing stainless steel slag treatment method, the method of the invention has an additional air-cooling step before the spraying, dipping and cooling step to evenly release the heat of the high-temperature liquid slag so as to effectively reduce the jet blast incidents; in addition, the slag is cooled and contracted to cause cracks so as to achieve better effects in the spraying, dipping and cooling step. In the spraying, dipping and cooling step, water is firstly uninterruptedly sprayed and then intermittently sprayed, followed by temperature measurement when the slag is in standing state, so as to ensure the slag cooling effect; the method can effectively prevent liquid-like slag in a slag tank, thereby avoiding jet blast caused by water in the slag dumping process.

Description

technical field [0001] The invention relates to a treatment method for slag, in particular to a treatment method for stainless steel smelting slag. Background technique [0002] The treatment method of stainless steel smelting slag in the prior art is usually to use a slag tank to hold the hot stainless steel slag, transport it to an open-air cooling field, directly spray and soak it for cooling, and then carry out the treatment process of slag turning. [0003] The slag discharged during the smelting process is transported at a temperature of about 1300°C, and its components are mainly composed of CaO, SiO 2 , MgO and other oxides, the alkalinity is about 1.8, and according to the percentage content, it is proposed to be CaO·SiO 2 (melting point 1540°C), the standard slag capacity of the slag tank is 12m 3 , the density of slag is 2.5T / m 3 , cooling from 1600K to 300K in one cooling, assuming no phase change occurs, according to constant pressure enthalpy change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B5/00
Inventor 尤勇明韩国栋李杰沈广礼
Owner SHANGHAI NO 1 IRON & STEEL CO LTD BAOGANG GRP
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