A steel slag advanced treatment process

An advanced treatment and steel slag technology, applied in grain treatment, cement production, etc., can solve the problem of comprehensive utilization of steel slag, etc., and achieve the effect of improving the comprehensive utilization value.

Active Publication Date: 2018-10-23
南京芬钢环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process only focuses on selecting granular iron powder with an iron grade of more than 60% from the powder, and has not yet realized the comprehensive utilization of steel slag.

Method used

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  • A steel slag advanced treatment process

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Experimental program
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Effect test

Embodiment

[0030] The steel slag advanced treatment process flow of the present embodiment is as follows figure 1 So, include the following steps:

[0031] 1) The stuffed steel slag is discharged by the excavator / crane, loaded onto the dump truck, transported to the raw material transfer station, and enters the vibrating feeding bin through the feeding platform.

[0032] 2) Vibrating feeding into the feeding bin, the diameter range of feeding is 0-400mm; the steel slag raw material transfer station above 400mm has a separate environmental protection dust removal pretreatment area, which is cut to below 400mm by oxygen and then processed online.

[0033] 3) Steel slag is divided into two types of 60~400mm and 0~60mm through the pre-selected trommel screen.

[0034] 4) Among them, the 60-400 mm steel slag is directly sent to the jaw crusher, and after crushing, it falls into the conveyor belt under the jaw crusher and is sent to the horizontal vibrating screen.

[0035] 5) Among them, th...

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Abstract

The invention provides a steel slag deep treatment technology. The steel slag deep treatment technology comprises steel slag crushing, screening and magnetic separation. Steel slag vibration feeding,first-time sorting, second-time sorting and magnetic separation are included, crushing and circular screening conducted among the above procedures are further included, and 99% or above of metal is economically and efficiently recycled through circulating of three-pass crushing, three-pass screening, two-pass magnetic separation, one-pass cleaning and twelve-point dust removal. The grain size standard of tailings for sales is 0-5 mm, the metal iron content is 1% or below, and renewable resources are sufficiently recycled. The maximum steel slag comprehensive utilization value is actually achieved, and zero discharging of tailings is achieved.

Description

technical field [0001] The invention relates to a treatment process for steelmaking waste, in particular to a steel slag advanced treatment process. Background technique [0002] Steel slag is the main solid waste in the steelmaking process. Based on the national steel production capacity of 800 million tons, 120 million tons of steelmaking steel slag is currently produced. However, the domestic steel slag treatment process is simple and extensive; usually after hot stuffing, cooling, and decomposition, large-diameter steel scrap and magnetic separation powder are sorted out; the remaining tailings are more than 20mm, accounting for more than 80% of the total treatment. Because it is not fully broken, it still contains about 4% elemental iron, and the content of more people even exceeds 5%. Moreover, the remaining tailings have serious problems of slag-coated iron and slag-iron solidification; due to the limitation of domestic technical level, the further processing of this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C21/00C04B7/147
CPCB02C21/00B02C2201/06C04B7/147Y02P40/10
Inventor 王严卢中伟
Owner 南京芬钢环保科技有限公司
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