Steel slag dry processing device and method

Abstract

The invention relates to a steel slag dry processing device comprising slag pond provided with an air atomizer, a gravitational precipitator, a heat-exchange device, a bag-type dust remover, a draught fan and an air compressor, wherein the air atomizer is connected with the gravitational precipitator connected with the heat-exchange device, the heat-exchange device is connected with the bag-type dust remover, the bag-type dust remover is connected with the draught fan and the air compressor is connected with the air atomizer and the gravitational precipitator. The invention has the advantages that: 1, the slag is cooled by air atomization, generated high-temperature gas can be recycled; 2, the steel slag after atomization cool can be directly used for sintering burdening, thereby realizing the effective utilization of the steel slag; and 3, the blast furnace slag does not need to be flushed with water, thereby saving a great amount of water resource.

Description

Technical field: [0001] The invention belongs to a method for processing steel slag. Background technique: [0002] Iron and steel slag is an important by-product of the iron and steel smelting process, which is divided into ironmaking blast furnace slag and steelmaking slag. At present, most of the blast furnace slag is made into water-washed slag by high-pressure water quenching, which is used as raw material for cement plants; a small part is slowly cooled and crushed into compact slag blocks of appropriate size to replace natural gravel. The main components of steelmaking slag are calcium oxide, magnesium oxide, and iron oxide, which can be used as auxiliary raw materials for ironmaking blast furnaces. At present, most of the steelmaking slag is slowly cooled and treated as waste landfills. [0003] The shortcomings of the existing iron and steel slag treatment methods: First, the large amount of heat contained in the slag is not effectively used when it is discharged, resulti...

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Problems solved by technology

[0003] The deficiencies of the existing iron and steel slag treatment methods: the first is that the large amount of heat contained in the slag is not effectively utilized when it is discharged, resulting in energy waste

Second, the blast furnace slag flushing process consumes a lot of water resources

The third is that the steelmaking slag has not been effectively utilized, and the consequences of landfill treatment are waste of resources and environmental pollution.

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