Steel slag treating technology

A technology for processing steel slag, which is applied in the field of steel slag processing and processing, can solve the problems of unfavorable subsequent use of products, large floor space, and substandard pollution, etc., and achieve favorable follow-up use, small floor space, and advanced and reasonable equipment Effect

Active Publication Date: 2013-09-11
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing steel slag processing technology has disadvantages such as large area occupation, large investment, substandard pollution, and unfavorable products for subsequent utilization.

Method used

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  • Steel slag treating technology

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Embodiment Construction

[0040] Now take the 400,000 tons / year steel slag processing and treatment production line of a steel factory as an example to illustrate this process:

[0041] The stuffy steel slag is stored in the raw material workshop, which can be stored for about 4 days. The aged steel slag is loaded to the B1 hydraulic tilting grid sieve (150mm×150mm) by the grab crane and wheel loader. Into the silo, the screened material is the bulk material produced when the steelmaking is running out of steel or hot stuffy treatment is abnormal, the steelmaking running steel is > 150mm slag steel, returned to steelmaking for use, and the big chunks produced when the hot stuffy treatment is abnormal The steel slag is broken by the hydraulic breaker and then returned to the B1 hydraulic tilting grid. The underscreen material enters the B3 belt conveyor through the B2 vibrating feeder under the silo, and then transfers to the B4 belt conveyor. The B5 belt magnetic machine is suspended above the B4 belt ...

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Abstract

The invention relates to a steel slag treating technology which can be used for treating steel slag after which is stabilized by adopting a hot and stuffy method. According to the technology, the steel slag is treated by the procedures of screening, crushing, magnetic separation, purification and the like through utilizing the mode of combining an open loop and a closed loop circulation to obtain five high-value-added high-quality products, namely first-type bulk slag steel with the grade of more than or equal to 80% and particle size of 150mm, a second-type bulk slag steel with the grade of more than or equal to 80% and particle size of 50-150mm, slag steel with grade of more than or equal to 85% and particle size of 10-50mm, magnetic separation powder with grade of more than or equal to 42% and particle size of 10mm, and metal iron content (2% of tailings with the particle size of 10mm), wherein the first-type bulk slag steel and the second-type bulk slag steel and the slag steel with the grade of more than or equal to 85% can be returned for steelmaking, the magnetic separation powder can be used for sintering, and the tailings can be used for producing steel slag micropowder as high-activity admixture of cement and concrete and the like. Through the technology, the zero emission of the steel slag can be realized, the defects that the steel slag stored occupies a large area and pollutes the environment can be solved, and the economic benefits of a steel mill can be increased.

Description

technical field [0001] The invention relates to a steel slag processing technology, belonging to the field of solid waste treatment, which can fully realize the resource utilization of steel slag with high added value and realize "zero discharge" of steel slag. Background technique [0002] Steel slag is industrial solid waste discharged during the steelmaking process of the iron and steel industry, accounting for about 15% of steel production. At the same time, steel slag raw materials contain abundant resources. It contains 5-10% steel, which can be returned to the steelmaking process for recycling; and steel slag is a kind of clinker, which has potential hydraulic activity after being ground into steel slag powder, and can be developed and utilized in a wide range of ways. [0003] At present, the utilization rate of steel slag in my country is only 10%, which is significantly different from that of foreign countries. The existing steel slag processing technology has di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/04
CPCY02W30/50
Inventor 张宇陆永林张健郝以党刘银梅赵蕊祝晶晶韩自博
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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