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Modification processing method for converter gas quenched steel slag stability and limestone modifier

A treatment method, limestone rock technology, applied in the field of converter gas-quenched steel slag, can solve the problems of unsatisfactory f-CaO digestion effect, insufficient sources of modifier raw materials, insufficient steel slag modification technical solutions, etc., to achieve the expansion of safety Scope of application, low cost, effect of reducing f-CaO content

Inactive Publication Date: 2012-11-28
GUIZHOU UNIV
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Problems solved by technology

The source of modifier raw materials required by this method is not wide enough, it is difficult to realize large-scale treatment in areas lacking iron tailings, and the digestion effect of f-CaO is not ideal enough, and the temperature required for the reaction is relatively high
[0005] Therefore, the existing steel slag modification technical scheme still has deficiencies

Method used

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Embodiment Construction

[0015] The present invention is described in further detail below in conjunction with embodiment.

[0016] The present invention uses a kind of limestone rock as the modifier for the stability of converter gas-quenched steel slag when modifying the stability of converter gas-quenched steel slag. The main component of this limestone rock modifier is SiO, which accounts for 47.63%. 2 And 33.28% CaO, other components are 3.52% Fe 2 o 3 And MgO, which accounts for 1.82%, mainly exists in the form of carbonate.

[0017] The specific method is to grind the limestone rock modifier with the gas-quenched steel slag, mix it, remelt it to 1000-1150°C, and heat it for 0.5-1.5 hours for modification treatment. The f-CaO contained in the converter steel slag reacts chemically with the modifier—limestone rock to form silicate compounds, which can effectively reduce the f-CaO content in the cold steel slag.

[0018] The modification of steel slag adopts the method of remelting and modifica...

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Abstract

The invention discloses a modification processing method for converter gas quenched steel slag stability. The method includes: fine grinding a limestone modifier and gas quenched steel slag, mixing, remelting to 1000-1150 DEG C, and incubating for 0.5-1.5 hours to conduct modification processing. The present invention also discloses a limestone as a stability modifier for the converter gas quenched steel slag. The modifier is a limestone. The main ingredients of the limestone include 47.63% of SiO2, 33.28% of CaO, and other ingredients like 3.52% of Fe2O3 and 1.82% of MgO. The steel slag stability modifier used in the invention is wide in raw material sources, low in cost, simple in the steel slag modification method, safe and reliable. In the modified steel slag, the content of F-CaO can be reduced to 0.012%-0.058%, therefore the security application scope of the steel slag is expanded.

Description

technical field [0001] The invention belongs to the processing technology of converter gas-quenched steel slag in iron and steel metallurgy industry, and specifically relates to a method for modifying the stability of converter gas-quenched steel slag and a limestone modifier. Background technique [0002] Steel slag is the waste slag produced in the process of steelmaking, second only to blast furnace slag in metallurgical industry waste, and the discharge of steelmaking tailings in my country is very large. Harmful substances contained in steel slag enter the soil after being washed by rainwater, destroying the vegetation structure of the land. Flying slag powder will pollute the environment and water sources, endanger human health and damage roads. At present, the processing and utilization of converter steel slag produced in the process of converter steelmaking is a difficult problem faced by various iron and steel production enterprises. [0003] In the slagging proce...

Claims

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Application Information

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IPC IPC(8): C04B5/06
Inventor 吴复忠王文豪窦守花高成涛王中原
Owner GUIZHOU UNIV
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