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Steel slag treatment technology and application of tailings obtained by steel slag treatment process

A treatment process and technology for steel slag, which is applied in the application field of steel slag treatment process and its resulting tailings, which can solve the difficulty of visible pollution control on site of dry grinding and dry separation, high control index of free calcium oxide, and uneven control of material particle size To achieve the effect of avoiding groundwater pollution, improving the grade and recovery rate of magnetic substances, and improving benefits

Active Publication Date: 2022-02-15
XINING SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this process, the control index of free calcium oxide in tailings is high, and the utilization direction is single, resulting in the loss of benefits; the particle size control of materials is uneven, the separation effect of slag and iron is poor, and the recovery rate of magnetic substances is low; dry grinding and dry selection can be seen on site Sexual pollution control is difficult

Method used

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  • Steel slag treatment technology and application of tailings obtained by steel slag treatment process
  • Steel slag treatment technology and application of tailings obtained by steel slag treatment process
  • Steel slag treatment technology and application of tailings obtained by steel slag treatment process

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Embodiment 1

[0033] A production process for road surface layer steel slag in alpine regions, comprising the following steps:

[0034] 1) steel slag is carried out pre-treatment, and described pre-treatment comprises heat-splashing treatment and heap stewing;

[0035] 2) The steel slag obtained after the pretreatment in step 1) is sieved by a drum sieve after three-stage crushing:

[0036] The material with a particle size of ≤8mm is directly subjected to multi-stage magnetic separation, the magnetic material is the final product steel fine powder, and the non-magnetic material is the final product tailings;

[0037] The material with a particle size > 8mm enters the rod mill for re-crushing, and the crushed material is screened again with a drum sieve, and the material with a particle size > 8mm is sorted by a magnetic separator. The magnetic material is the final product particle steel, and the non-magnetic material is recycled. Enter the rod mill.

[0038] In this embodiment, during t...

Embodiment 2

[0044] A production process for road surface layer steel slag in alpine regions, comprising the following steps:

[0045] 1) steel slag is carried out pre-treatment, and described pre-treatment comprises heat-splashing treatment and heap stewing;

[0046] 2) The steel slag obtained after the pretreatment of step 1) is sieved after three-stage crushing:

[0047] The material with a particle size of ≤8mm is directly subjected to multi-stage magnetic separation, the magnetic material is the final product steel fine powder, and the non-magnetic material is the final product tailings;

[0048] Materials with a particle size > 8mm enter the rod mill for re-crushing, and the crushed materials are screened again. Materials with a particle size > 8mm are sorted by a magnetic separator. The magnetic material is the final product particle steel, and the non-magnetic material circulates into the rod mill. machine.

[0049] In this embodiment, the stacking and stewing process adopts the ...

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Abstract

The invention belongs to the technical field of steel slag production and application, and discloses a steel slag treatment technology. The steel slag treatment technology comprises the following steps that: 1) pretreatment is performed on steel slag, wherein the pretreatment involves hot splashing treatment and piling braising; and (2) steel slag obtained after pretreatment in the step (1) is screened after being subjected to three-stage crushing, materials with the particle size smaller than or equal to 8 mm are directly subjected to multi-stage magnetic separation, magnetic substances are final product steel fine powder, non-magnetic substances are final product tailings, materials with the particle size larger than 8 mm enter a rod mill to be crushed again, the crushed materials are screened again, the materials with the particle size larger than 8 mm are sorted through a magnetic separator, magnetic substances are final product particle steel, and non-magnetic substances circularly enter the rod mill. According to the process of the technology, sewage and visual pollution are not generated, production is not affected by regions and seasons, and the TFe grade of the steel fine powder and the recovery rate of the magnetic substance are improved; and the application channel of the steel slag tailings is widened, the steel slag tailings can be used for road surface layers in alpine regions, the benefits of the tailings are improved, and cyclic utilization of metallurgical solid waste resources is achieved.

Description

technical field [0001] The invention relates to the technical field of steel slag production and application, in particular to a steel slag treatment process and the application of the obtained tailing slag. Background technique [0002] Iron and steel metallurgical waste slag is solid slag containing calcium, magnesium, aluminum, silicon and other elements produced in the steelmaking process of the iron and steel industry. In recent years, with the development of my country's economy, the production capacity of steel has increased, and the discharge of steel slag has also increased. Judging from the production situation of domestic steel enterprises, the current annual output of steel slag exceeds 120 million tons. In addition, due to the low utilization rate of steel slag, the current stockpile of steel slag is huge, causing serious land occupation, pollution and waste of resources. In view of the severe stockpiling of steel slag, the "Environmental Protection Tax Law" wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06C21B3/08B02C21/00B02C23/08B03C1/30E01C7/00
CPCC21B3/06C21B3/08B02C21/00B02C23/08B03C1/30E01C7/00C21B2400/024Y02P10/20Y02W30/50
Inventor 王宝权蔡全财丁万鑫王青海吴俊新陈志强唐万云贺国禄汪钟全张昌
Owner XINING SPECIAL STEEL
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