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Comprehensive steel slag utilization method

A technology for steel slag and steel slag sand, which is applied in the field of comprehensive utilization of steel slag, can solve problems such as low utilization efficiency of steel slag, and achieve the effects of improving air separation efficiency, improving efficiency and reducing burden

Pending Publication Date: 2019-05-10
湘潭玉峰新材料科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

The utilization efficiency of steel slag is low in the prior art

Method used

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Embodiment Construction

[0054] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0055] refer to figure 1 , the comprehensive utilization method of steel slag in the present embodiment, comprises the steps:

[0056] S1. Aging: Stack the steel slag produced in the steelmaking process for more than 3 months in the natural environment to obtain aged steel slag; the chemical properties of the aged steel slag are more stable and the moisture content is also reduced;

[0057] Before the step S1, it also includes: regularly checking the chemical composition and physical properties of the steel slag, such as moisture content;

[0058] S2. Drying: Send the aged steel slag obtained in step S1 into a rotary dryer for drying treatment to obtain dried steel slag; wherein, the drying temperature in the drying process is 700°C , the moisture content of the dried steel slag is below 1%;

[0059] S3, crushing: crushing...

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Abstract

The invention discloses a comprehensive steel slag utilization method which includes the steps: S1 ageing: stacking steel slag for 3 months or more to obtain aged steel slag; S2 drying the aged steelslag to obtain dried steel slag; S3 crushing the dried steel slag to obtain crushed steel slag; S4 rolling the crushed steel slag to obtain rolled steel slag; S5 primary iron removal: feeding the rolled steel slag into a magnetic separator to perform first iron removal to obtain iron particles I and steel slag after primary iron removal; S6 air separation: feeding the steel slag after primary ironremoval into an air separation device, and performing air separation to obtain fine steel slag powder, steel slag and sand mixture and steel slag coarse materials; S7 secondary iron removal: performing secondary iron removal on the steel slag and sand mixture to obtain iron particles II and steel slag and sand mixture after secondary iron removal; S8 screening the steel slag and sand mixture to obtain steel slag sand with different particle diameters. According to the method, waste steel slag generated in the steel making process serves as a raw material, so that the iron particles, the finesteel slag powder and the steel slag sand with the different particle diameters are prepared in a united manner, and the steel slag is comprehensively utilized.

Description

technical field [0001] The invention relates to the technical field of steel slag processing, in particular to a comprehensive utilization method of steel slag. Background technique [0002] Steel slag is a by-product of the steelmaking process. Steel slag is composed of various oxides formed by oxidation of silicon, manganese, phosphorus, sulfur and other impurities in pig iron during the smelting process, and salts formed by the reaction of these oxides with solvents. The steel slag contains a variety of active ingredients: 2%-8% of metallic iron, 40%-60% of calcium oxide, 27%-31% of silicon oxide, 3%-10% of magnesium oxide, and 1%-8% of manganese oxide. The utilization efficiency of steel slag is low in the prior art. Contents of the invention [0003] In order to make up for the deficiencies of the above-mentioned prior art, the present invention proposes a comprehensive utilization method of steel slag. [0004] Technical problem of the present invention is solved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B5/00B09B3/00B09B5/00C22B7/00C22B7/04
CPCY02P10/20
Inventor 何宇峰何文科何涛
Owner 湘潭玉峰新材料科技有限公司
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