Blast furnace slag flushing water purification system and method thereof

Abstract

The invention discloses a blast furnace slag flushing water purification system and a method thereof, pertaining to the technical field of blast furnace ironmaking in the iron and steel industry. The system comprises a slag water tank, a filter, a filter pump, a clear water reservoir, a back flush water pump, a filter butterfly valve, a back flush butterfly valve and a matched valve and a slag bin for back flushing. One or a plurality of filters are arranged for purifying slag flushing water containing suspended fine slag and are internally provided with filter elements which are arranged in order; though the equipment is small, the filter area is much larger than that in a bottom filter method; the back flush water pump is used for reversely injecting the clear water in a clear water flow flushing filter element for removing the slag on the surface and recovering the filtering quality. The filter pump can be integrated with the slag flushing pump in the existing slag treatment system, thus being capable of filtering and flushing slag simultaneously with one pump. The blast furnace slag flushing water purification system and the method thereof have the advantages of good purification effect and high filter velocity, therefore, the filter area is small, the volume of the equipment is small, the operation is easy and the maintenance is convenient.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking in the iron and steel industry, and in particular provides a blast furnace slag flushing water purification system and a method thereof, which are suitable for water quality purification of the blast furnace slag flushing system. Background technique [0002] Blast furnace slag treatment mostly adopts water flushing slag technology. The liquid slag is water-quenched in front of the furnace and turned into water-containing slag, which is used as cement raw material. There are many methods for flushing slag, such as slag pool sedimentation method, Lhasa method, Yingba method, wheel method, cage stirring method, etc., all of which are different treatment processes of hot slag water quenching. [0003] At present, the Yingba method, the wheel method and the cage method are widely used, and other methods are also used. However, no matter which method is used, there is the problem of ...

AI Technical Summary

Problems solved by technology

It overcomes the disadvantages of impure separation of slag and water in various slag treatment methods except the bottom filtration method, and the defects that the bottom filtration method occupies a large area and is complicated to operate.

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