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Method for reusing common steel slag

A common steel and steel slag technology, which is applied in recycling technology, chemical instruments and methods, and filter screens, can solve the problems of insufficient utilization of resources and low metal recovery rate of common steel and steel slag processing lines.

Inactive Publication Date: 2012-07-04
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]There are 920,000 t / year ordinary steel slag processing lines with low metal recovery rate and insufficient utilization of resources

Method used

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  • Method for reusing common steel slag
  • Method for reusing common steel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036] Example: This embodiment is an embodiment of a common carbon steel slag processing production line with an annual processing capacity of 600,000 tons in the carbon steel slag division of the Taiyuan Iron and Steel Processing Plant in January 2011, and the operation effect is good.

[0037] 1. Stewed slag and dried

[0038] ⑴Slag stewing: transport the red-hot ordinary steel slag out of the furnace to the hot pouring field, and preliminarily crush the large steel slag with a particle size greater than 2 meters, and then put the ordinary steel slag into it with a length of 7 meters and a width of 7 meters. , the effective depth is 5 meters in the hot pool, wait for 30 minutes for soaking; cover the lid and use the spray device in the cover to continuously and evenly draw water on the steel slag. The spray device adopts a spiral nozzle, which is required The distribution is even and can cover the entire slag surface, the water flow rate is 20 tons / hour, and the water ext...

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Abstract

The invention relates to a method for reusing common steel slag. The method comprises the process links of performing hot closed treatment on slag, airing, sieving, performing magnetic separation and grinding and particularly comprises the following steps of: transporting red hot common steel slag to a hot splashing field and performing hot splashing; preliminarily crushing large common steel slag with the grain size of more than 2 m to the slag with the grain size of less than 2 m; placing the common steel slag into a hot closed treatment pool and uniformly heating for 30 minutes; covering a cover of the hot closed treatment pool; continuously and uniformly spraying water on the steel slag by using a spraying device in the cover, wherein the water spraying flow is 20 tons per hour and the water spraying time is 7 hours; after stopping spraying water, continuously performing hot closed treatment for more than 5 hours; opening the cover and measuring the temperature to 50 to 80 DEG C and the water content of the common steel slag is 6 to 8 percent; and conveying the steel slag subjected to hot closed treatment to a stacking field and airing for more than 24 hours, wherein the water content is 4 to 6 percent. Compared with the traditional treatment process, the method has the advantages that: metal recycling capacity is high; product grade is high; all the common steel slag can be treated; and the product can be utilized well.

Description

Technical field: [0001] The invention belongs to the recycling and reuse of steel slag resources in the metallurgical industry, and in particular relates to a method for utilizing common steel slag. [0002] The common steel mentioned in the present invention refers to JZ35, Q235, Q195L, 10# steel and T420L steel. Background technique [0003] Shanxi Taigang Stainless Steel Co., Ltd. currently produces 1.52 million tons of ordinary steel slag annually. Steel slag is divided into 3 categories, which are first steel electric furnace carbon steel slag; second steel converter carbon steel slag and molten iron pretreatment slag. [0004] There are 920,000 t / year ordinary steel slag processing lines with low metal recovery rate and insufficient utilization of resources. According to the concept of circular economy and clean production, implement the relevant national environmental protection policies and high-value utilization of steel slag, further control the pollution of stee...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B3/08B03C1/02B07B1/28B02C17/10
CPCC21B2400/024C21B2400/062C21B2400/068Y02P10/20Y02W30/50
Inventor 樊绳平张懋赵天祥
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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