Steel smelting slag treatment method

Abstract

The invention relates to a steel smelting slag treatment method. The steel smelting slag treatment method mainly comprises the following steps of conveying cooling, crushing, magnetic separation, water washing and transferring accumulation, wherein water washing equipment used in the mentioned steps comprises a material falling hopper, a water washing tank and a screening device, the material falling hopper is installed at the upper end of the water washing tank, a screening device is installed in the water washing tank, the water washing tank is of a hollow cylindrical structure, and water washing spray heads are uniformly arranged on the inner wall of the water washing tank in the circumferential direction of the water washing tank; and feeding ports are uniformly formed in the bottom end of the water washing tank in the circumferential direction of the water washing tank, and a water outlet is formed in the bottom end of the water washing tank. According to the steel smelting slag treatment method, the slag can be uniformly stirred while the slag is washed, so that the water washing completeness is ensured, the slag can be subjected to preliminary screening and separate collection in a small-to-large size sequence, and the time for size sorting of the slag in the subsequent treatment process is saved.

Description

technical field [0001] The invention relates to the technical field of metallurgical waste treatment, in particular to a method for treating iron and steel smelting slag. Background technique [0002] Slag, also known as molten slag, is a melt that floats on the surface of liquid substances such as metals during pyrometallurgy. Its composition is mainly oxides, often containing sulfides and entraining a small amount of metal, so it can be used for secondary use. The slag needs to be processed before it can be used. [0003] At present, the slag treatment method adopted by most domestic iron and steel plants is mostly a simple crushing and magnetic separation process. The process includes transportation, crushing, magnetic separation, water washing and transfer, and the following problems exist during water washing: [0004] (1) During the washing process, the slag is all piled up in one place, so the washing equipment can only wash the slag on the surface of the slag pile, ...

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Problems solved by technology

[0004] (1) During the washing process, the slag is all piled up in one place, so the washing equipment can only wash the slag on the surface of the slag pile, and it is difficult to clean the slag in the middle, and the clean slag will also be affected by the unclean slag Pollution, washing effect is extremely unsatisfactory;

[0005] (2) Usually after water washing, regardless of the size of the slag, all the slag will be transported together, and then the slag will be screened according to the size, which needs to process a large amount of slag at the same time, which increases the working intensity of the equipment. To ensure work efficiency, the screening time is tight, and the screening effect is not ideal

[0006] In order to solve the above problems, the present invention provides a treatment method for iron and steel smelting slag, which can solve the problems of incomplete water washing and poor screening effect in the above treatment process

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