Process for cooling stainless steel slag by wet method

A treatment process and technology for stainless steel slag, applied in the field of stainless steel, can solve the problems affecting the secondary development and utilization of stainless steel slag, unfavorable slag tank turnover, complicated spraying process and other problems, achieve good high temperature resistance to steel slag performance, facilitate turnover, and improve economic benefits Effect

Inactive Publication Date: 2012-09-19
BAOSTEEL DEV CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] However, this technology also has some problems, such as: the spraying process is complicated, and the slag tank needs to be transported to the designated spraying point, which is not conducive to the turnover of th...

Method used

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  • Process for cooling stainless steel slag by wet method

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Embodiment

[0021] (1) Use 17M 3 The slag tank is filled with 400 series stainless steel slag, lifted to the open-air cooling field, and left to cool naturally in the air. After 20 hours of air cooling, the temperature of the tank wall is measured intermittently. When the highest temperature of the tank wall is 170°C or lower During the process, use a spray gun to spray water directly on the surface of the steel slag in the slag tank continuously, and let it cool for 4 to 6 hours. At this time, there is no molten slag; When the maximum temperature of the tank wall is lower than 120°C and the temperature of the steel slag inner core is lower than 300°C, pour the slag to the stainless steel slag accumulation yard, turn the slag in the slag box; Pneumatic pick machine is used for crushing, which is divided into multiple cooling steps and crushed step by step, and the block material with a diameter of less than 200mm is used as the tank material;

[0022] (2) Use the grab bucket to pick up t...

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Abstract

The invention discloses a process for cooling stainless steel slag by a wet method. The process comprises the following steps of: cooling naturally for 20 to 24 hours on a cooling station after electric furnace mother solution slag is conveyed from a field; spraying for cooling for 4 to 6 hours, and controlling a slag surface, so that water is not accumulated on the slag surface; standing for 3 to 4 hours, when the maximum temperature of the walls of slag tanks is lower than 120 DEG C and the temperature of an inner core of the steel slag is lower than 300 DEG C, turning the slag over in a slag box, keeping dried in the slag box, and paving by using the massive slag; crushing the turned massive steel slag, wherein massive materials of which the diameter is smaller than 200 millimeters are taken as tank filling materials; transferring the tank filling materials into empty slag tanks to fill up the tank, wherein 3 to 5 tons of tank filling materials are added into each empty slag tank; and conveying the filled slag tanks to a slagging point and receiving the slag, and conveying the received slag to a slag field. The process has the advantages of separating the stainless steel slag from carbon steel slag, along with high cooling speed, high turnover efficiency of the slag tank, a few intermediate link and the like while the problem of tank adhesion is solved.

Description

technical field [0001] The invention relates to the technical field of stainless steel, in particular to a stainless steel slag wet cooling treatment process. Background technique [0002] During the steelmaking process of stainless steel, various steel slags are produced, including electric furnace door slag, electric furnace mother liquid slag, refining slag, and casting residue. Baosteel alone produces about 400,000 tons of steel slag every year. The steel slag needs to be taken over by a slag tank, and then transferred to the slag yard for dumping. Since the steel slag has a high temperature and contains a large amount of molten substances, direct introduction into the slag tank will cause the steel slag to stick to the tank, and the steel slag needs to be cleaned. This process is time-consuming and laborious, which undoubtedly increases the cost. In order to prevent the steel slag from sticking to the tank, the current common practice is to spray high-temperature separ...

Claims

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Application Information

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IPC IPC(8): C21B3/08
CPCC21B2400/024C21B2400/026C21B2400/07C21B2400/072
Inventor 尤勇明徐志耀韩国栋
Owner BAOSTEEL DEV CO LTD
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