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Steel slag selecting method

A steel slag and magnetic separation technology, applied in solid separation, recycling technology, mechanical material recovery and other directions, can solve problems such as environmental pollution, and achieve the effect of solving environmental protection pressure, realizing maximization, and realizing the utilization of steel slag.

Inactive Publication Date: 2019-09-10
周涛 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to: aim at the above existing problems, provide a method for sorting steel slag, prepare ultra-high-purity magnetite concentrate by physical methods, and recycle steel slag to prepare various iron products, which improves the production efficiency of steel slag. The utilization rate of steel slag further solves the problem of environmental pollution caused by the preparation of ultra-high-purity magnetite concentrate

Method used

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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, a kind of steel slag sorting method for cement iron correction agent is provided, comprising the following steps:

[0039] Step 1: Carry out the first stage of ball milling steel slag until the particle size of steel slag exceeds 100 mesh, and then perform the first magnetic separation to obtain a magnetically separated concentrate and tailings for future use; The abrasive after ball milling enters the high weir type spiral classifier for classification, and the unqualified particle size (>100 mesh) steel slag classified by the high weir type spiral classifier is returned to the first stage of ball mill to continue ball milling, and repeated cycles until the graded mineral material particle size If the particle size is less than 100 mesh, the first magnetic separation will be performed on the ore with a particle size of less than 100 mesh after classification. The magnetic field strength of the first magnetic separation is 850±50GS. The tailin...

Embodiment 2

[0041] A method for sorting steel slag, specifically comprising the following steps:

[0042] Step 1: Carry out the first stage of ball milling steel slag until the particle size of steel slag exceeds 80 meshes, and then perform the first magnetic separation to obtain a magnetically separated concentrate and tailings for use; The abrasive after ball milling enters the high weir type spiral classifier for classification, and the steel slag with unqualified particle size (>80 mesh) classified by the high weir type spiral classifier enters the first stage of ball mill to continue ball milling, and repeats the cycle until the graded mineral material particle size If it is less than 80 mesh, the first magnetic separation will be performed on the ore with a particle size of less than 80 mesh after classification. The magnetic field strength of the first magnetic separation is 850±50GS, and the magnetic separation will obtain a magnetic separation concentrate and tailings. The tailing...

Embodiment 3

[0045] The present embodiment provides a kind of sorting method of steel slag, specifically comprises the following steps:

[0046] Step 1: Carry out the first stage of ball milling steel slag until the particle size of steel slag exceeds 90 meshes, and then perform the first magnetic separation to obtain a magnetically separated concentrate and tailings for use; The abrasive after ball milling enters the high weir type spiral classifier for classification, and the steel slag with unqualified particle size (>90 mesh) classified by the high weir type spiral classifier enters the first stage of ball mill to continue ball milling, and repeats the cycle until the graded mineral material particle size If it is less than 90 mesh, the first magnetic separation will be performed on the ore with a particle size of less than 90 mesh after classification. The magnetic field strength of the magnetic separation is 850±50GS, and the magnetic separation will obtain the primary magnetic separa...

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Abstract

The invention discloses a steel slag selecting method. The steel slag selecting method is characterized by comprising the following steps that S1, primary magnetic separation is carried out after steel slag is subjected to primary ball milling until the particle size of the steel slag is 80-100 meshes, and a primary magnetic separation concentrate and tailings are obtained for later use; S2, demagnetic treatment is carried out on the primary magnetic separation concentrate, secondary ball milling is carried out on the demagnetized primary magnetic separation concentrate until the particle sizeis 180-200 meshes, and secondary magnetic separation is carried out on the concentrate subjected to ball milling to obtain secondary magnetic separation concentrate and tailings for later use; and S3, demagnetic treatment is carried out on the secondary magnetic separation concentrate, then three-section ball milling and multiple times of magnetic separation and reselection treatment are carriedout on the demagnetized concentrate to obtain an ultrahigh-purity magnetite concentrate and a high-grade iron ore concentrate. The steel slag selecting method is mainly used for selecting the ultrahigh-purity magnetite concentrate from the steel slag, belongs to a pure physical method, does not use a chemical agent in the production process, and is green and environment-friendly; and the production cost is 35% of the production cost of a traditional chemical method for producing the ultrahigh-purity magnetite concentrate, and the method has remarkable economic benefits and market popularization values.

Description

technical field [0001] The invention relates to the field of sorting iron concentrates, in particular to a sorting method for steel slag. Background technique [0002] The grade of iron ore concentrate currently produced by my country's iron ore concentrators is generally between 58% and 68%. After being sintered or made into pellets, it enters the blast furnace. According to the current market forecast, providing high-grade iron concentrate (greater than 69.00%) for non-blast furnace ironmaking will be one of the key development directions of qualified iron concentrate production enterprises in the future. According to different uses, high-grade iron concentrate is also called super iron concentrate, high-purity iron concentrate, high-quality iron concentrate, etc. It refers to iron concentrate with high iron content and low gangue content. It is not only a deep-processing product of mineral dressing, but also a new type of functional material with great development potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06
CPCB03B9/06Y02W30/52
Inventor 周涛袁永珍刘明利杨科邓星星吴崇高
Owner 周涛
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