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Method for preparing steel slag water washing sand used as a substitute for yellow sand

A technology for washing sand and steel slag, applied in chemical instruments and methods, wet separation, solid waste removal, etc., can solve the problem of steel slag pellets without performance indicators and other problems, and achieve improved performance, stable performance, and significant environmental benefits. Effect

Active Publication Date: 2007-02-07
MCC BAOSTEEL TECH SERVICE
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  • Description
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Problems solved by technology

General steel slag can form steel slag pellets with different fineness according to the specifications of the screen after the usual sorting and magnetic separation processing. The sorted steel slag pellets have no performance requirements, nor have they been developed and utilized in a targeted manner, and the remaining steel slag pellets are further processed

Method used

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  • Method for preparing steel slag water washing sand used as a substitute for yellow sand

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] The invention discloses a method for preparing steel slag water-washed sand used to replace yellow sand, which comprises repeated magnetic separation, crushing, and sorting of steel slag until the particle size is less than 5mm, and then sorting, water-washing, and magnetic separation.

[0018] The specific operation steps are:

[0019] (1) Fully crushing, sorting, and magnetically separating steel slag raw materials, and concentrating steel slag magnetic separation materials and sorting materials with a particle size of <5mm;

[0020] (2) Evenly distribute the magnetic separation material and sorting material with a particle size of <5mm obtained after the previous process into the water washing magnetic separator, and fully carry out water washing and magnetic separation. While recovering the magnetic separation iron sand, Filter out...

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Abstract

The present invention relates to the processing and application of steel slag resource, and is especially the preparation process of water washed steel slag sand for replacing yellow sand in building. Steel slag is magnetically selected repeatedly, crushed to size not larger than 5 mm, sorted, water washed and magnetically re-selected to form the water washed steel slag sand. The water washed steel slag sand has iron content less than 1 %, mud content less than 5 % and free calcium oxide content less than 4 %. Detection shows that the water washed steel slag sand has stable performance, no radioactivity and low content of metal iron, free calcium oxide and other harmful components, and may be used as fine aggregate for concrete in building.

Description

technical field [0001] The invention belongs to the field of processing and application of steel slag resources, and relates to a method for preparing yellow sand substitutes for construction, in particular, a method for preparing steel slag water-washed sand used to replace yellow sand. Background technique [0002] With the continuous acceleration of the industrialization process, resources are becoming more and more scarce. As the country continues to strengthen the protection of rivers, the yellow sand used in construction is facing the problem of limited mining. It is urgent to find high-quality and low-cost substitutes as soon as possible. [0003] As a by-product of steelmaking, steel slag has always been a problem of high value-added utilization. General steel slag can form steel slag pellets with different fineness according to the specifications of the screen after the usual sorting and magnetic separation processing. The sorted steel slag pellets have no performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/08B03B7/00B03B9/04B03C1/00B09B3/00C04B18/14
CPCC04B18/142Y02W30/91C04B20/02C04B20/026
Inventor 金强郭江浩高卫波吴春久
Owner MCC BAOSTEEL TECH SERVICE
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