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Steel slag iron removing method

A technology for removing iron from steel slag and magnetic separation, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problem of low recovery rate of iron element and achieve good effect of iron removal

Inactive Publication Date: 2018-04-06
广西力合城市矿产再生资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for removing iron from steel slag, which can solve the problem of low recovery rate of iron elements in steel slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The steel slag iron removal method used in this embodiment is as follows: transport the steel slag to the industrial solid waste storage center for stacking, sprinkle tap water to moisten it when stacking, shovel it into the storage hopper by a forklift, transport it to the vibrating screen by belt, and manually pick out large pieces of stainless steel waste slag , falling into the jaw crusher with a grid of 50×50mm and crushing until the particle size is 1 mm to 5 mm, the crushed material is conveyed into the wet ball mill through the belt, and then transferred to the wet ball mill for ball milling until the particle size of the steel slag is 350 microns. The slurry mixture is transported to the shaking table for separation to obtain stainless steel pulp I; the stainless steel pulp I is transported to the electromagnetic separator for magnetic separation to remove iron to obtain stainless steel pulp II; add foaming agent to the stainless steel pulp II, mix evenly, and ad...

Embodiment 2

[0024] The steel slag iron removal method used in this embodiment is as follows: transport the steel slag to the industrial solid waste storage center for stacking, sprinkle tap water to moisten it when stacking, shovel it into the storage hopper by a forklift, transport it to the vibrating screen by belt, and manually pick out large pieces of stainless steel waste slag , the 50×50mm grid falls into the jaw crusher and crushed until the particle size is 1 mm to 5 mm. The crushed material is conveyed into the wet ball mill through the belt, and then transferred to the wet ball mill for ball milling until the particle size of the steel slag is 600 microns. The slurry mixture is transported to the shaking table for separation to obtain stainless steel pulp I; the stainless steel pulp I is transported to the electromagnetic separator for magnetic separation to remove iron to obtain stainless steel pulp II; add foaming agent to the stainless steel pulp II, mix evenly, and adjust The...

Embodiment 3

[0028] The steel slag iron removal method used in this embodiment is as follows: transport the steel slag to the industrial solid waste storage center for stacking, sprinkle tap water to moisten it when stacking, shovel it into the storage hopper by a forklift, transport it to the vibrating screen by belt, and manually pick out large pieces of stainless steel waste slag , falling into the jaw crusher with a grid of 50×50 mm and crushing until the particle size is 1 mm to 5 mm, the crushed material is conveyed into the wet ball mill through the belt, and then transferred to the wet ball mill for ball milling until the particle size of the steel slag is 200 microns. The slurry mixture is transported to the shaking table for separation to obtain stainless steel pulp I; the stainless steel pulp I is transported to the electromagnetic separator for magnetic separation to remove iron to obtain stainless steel pulp II; add foaming agent to the stainless steel pulp II, mix evenly, and a...

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Abstract

The invention discloses a steel slag iron removing method, and relates to the technical field of steel slag recycling. The method comprises the following steps of steel slag crushing, ball grinding, table concentrator separating, magnetic separation, foam flotation and secondary magnetic separation. Under the action of electrostatic force, a collecting agent carries impurity particles, ascends toa foam layer containing foam and overflows and is discharged along with foam, stainless steel minerals are left at the bottom, and the iron removing effect is good; and finally, magnetic separation iron removing is conducted, iron in the steel slag can be thoroughly removed, and resource recycling is achieved.

Description

technical field [0001] The invention relates to the technical field of steel slag recovery, in particular to a method for removing iron from steel slag. Background technique [0002] Steel slag is the slag discharged during the steelmaking process, mainly the oxides formed after the oxidation of various elements in the metal charge, the eroded furnace lining and repair materials, the impurities brought in by the metal charge, and the smelting of different steel types. Limestone, dolomite, fluorite and other slagging materials are specially added. Since the molten slag was not sufficiently water-quenched, it was partially pulverized due to natural cooling, and the appearance was blocky and powdery, accounting for 50% each. [0003] The iron content in the steel slag reaches 3% to 4%, and the iron content in the steel slag discharged by the iron and steel industry reaches more than 15 million tons every year. Steel slag has high iron content. If the iron in steel slag cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30B03D1/02B03B1/00
CPCB03C1/30B03B1/00B03D1/02
Inventor 欧福文谢华东吴文伟范翔张天云
Owner 广西力合城市矿产再生资源科技有限公司
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