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Steel scoria processing method

A treatment method and technology for steel slag, which are applied in chemical instruments and methods, wet separation, magnetic separation, etc., can solve the problems of unenvironmental protection and low utilization rate of waste slag treatment, and achieve the effect of large yield, elimination of pollution and high economic benefit.

Inactive Publication Date: 2009-01-14
NANJING BANQIAO SLAG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is: the treatment of waste residue produced by steelmaking and ironmaking is not environmentally friendly, and the utilization rate is low

Method used

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  • Steel scoria processing method

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Effect test

Embodiment 1

[0014] 1) Rough selection: Load the material into the vibrating screen with a loader for rough separation and vibration separation. The purpose is to distinguish the large steel slag above 150mm from the small and medium steel slag below 150mm. The iron content of large steel slag is 70% The above can be directly sent to the steel mill for re-melting, and the remaining large slag has a low iron content, which is sent to the jaw crusher for crushing, and the particle size of the discharge port is 20-60mm, and mixed with small and medium-sized materials;

[0015] 2) Classify and magnetically separate the medium and small pieces of steel slag mixture. The classification is mainly to treat the steel slag with a particle size of about 50-150mm through a magnetic separator to separate the slag from the iron. After this process, the steel slag with an iron content above 50% The steel slag is sent to the iron factory to return to the furnace, and the remaining part of the slag enters t...

Embodiment 2

[0020] 1) Rough selection: Raw materials enter the vibrating screen, screen out large pieces of steel slag with a particle size of 300mm or more and an iron content of 65-75%, and send them directly to the iron and steel plant for recycling, and send the large pieces of slag with a particle size of 150-300mm to the jaw crusher Carry out coarse crushing, the particle size of the discharge port is 20-60mm, and mix with medium and small pieces of steel slag with a particle size below 150mm, and send it to the magnetic separator and vibrating screen for separation through the conveyor;

[0021] 2) Sorting and magnetic separation: Steel slag with a particle size of 20-150mm, after magnetic separation, the steel slag with an iron content of more than 50% is directly sent to the ironworks for return to the furnace, and the steel slag with a size of 50-80mm is screened out for fine crushing;

[0022] 3) Fine crushing and magnetic separation: the steel slag with a particle size of 50-80...

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Abstract

The invention relates to a steel-slag processing method, including the procedures of separation, magnetic separation, fine crushing, magnetic separation, ball-mill washing, etc. The slag and steel are separated by fine processing of waste steel slag, the iron content in the waste slag is lowered, the waste steel is smelted again and recovered for use. The invention can ensure high yield and high economic benefit; and is capable to remove pollution and achieve a benign cycle.

Description

technical field [0001] The invention is a steel slag processing method. Background technique [0002] Usually, the waste slag produced by large-scale metallurgical enterprises in steelmaking and ironmaking cannot be further processed, and the waste slag produced is flooded, polluting the environment, and cannot be fully utilized, wasting resources, and economic technology cannot be recycled. Contents of the invention [0003] The problem to be solved by the present invention is: the waste slag produced by steelmaking and ironmaking is not environmentally friendly, and the utilization rate is low. [0004] Technical scheme of the present invention is: steel slag processing method, comprises following operation: [0005] 1) Rough selection: the raw material enters the vibrating screen, and the large steel slag and the small and medium steel slag are separated by 150mm as the boundary. The iron content of the large steel slag is more than 70% and can be directly sent to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B07B1/28B03C1/02
Inventor 汪根海
Owner NANJING BANQIAO SLAG
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