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Purification technique of steel scoria magnetic separation product

A technology for magnetic separation and production of steel slag, applied in magnetic separation, solid separation, wet separation, etc., can solve problems such as metal loss, and achieve the effects of increasing iron content, large economic benefits, and sufficient material recovery

Active Publication Date: 2012-12-12
鞍钢绿色资源科技有限公司 +1
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  • Application Information

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Problems solved by technology

Although the invention patent with the patent application No. 00123358.0 discloses a magnetic separation steel slag reprocessing process, since the separation method of this process only uses magnetic separation, the non-magnetic or weakly magnetic iron-containing materials cannot be separated in time , resulting in a certain amount of metal loss

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  • Purification technique of steel scoria magnetic separation product

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0008] The invention relates to a purification process for steel slag magnetic separation products. The steel slag magnetic separation products with a particle size of 50-0mm (iron content of granular iron is 60%-65%, particle size is 50-0mm; magnetic separation powder grade is 40%- 50%, the particle size is 5-0mm) as raw materials, and after sorting, three products are finally produced, namely lump iron, refined powder and tail powder. This process can not only process granular iron and magnetic separation powder alone, but also process the mixture of granular iron and magnetic separation powder.

[0009] like figure 1 As shown, the raw materials are transported by car to the sorting workshop, and the pre-loading machine is used to load the raw material warehouse 1 before the slag grinding. For materials with a concentration of 70% to 80%, the materi...

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Abstract

The invention discloses a purification technique of steel slag magnetic separation products, which comprises the following steps: (1) the steel slag magnetic separation product is put into a ball mill and water is added, (2) full grinding is processed, the product is discharged from the exhaust end of the ball mill naturally and divided into up-screen product and below-screen product through a cylinder screen, (3) the up-screen product is divided into block iron and tailings by magnetic pulley, the block iron is dried by dryer to make water content below 2%, (4) the product below screen is divided into overflow and sand-returning by a classifier, and the overflow grade of the classifier is controlled by the size of the spray water, which controls the sand-returning grade of the classifier, and (5) the sand-returning is conveyed into the fine powder feed chute through belt, the classifier overflow is conveyed to the thickener through a pump, and the underflow of the thickener is filtered by the filter and conveyed into the tail powder feed chute. The purification technique of steel slag magnetic separation products has the advantages of no non-magnetic and weakly magnetic material loss, full and complete recovery, raising the content of iron of luppen from 60% to 65% to above 90%, raising the grade of the magnetic separation powder from 40% to 50% to above 60%, raising the content of iron of steel slag product completely, and raising the comprehensive utilization ratio of the steel slag.

Description

technical field [0001] The invention relates to a steel slag treatment process, which is a process for deep processing steel slag magnetic separation products (granulated iron and magnetic separation powder). Background technique [0002] Steel slag is the waste residue removed during the steelmaking process. Steel slag mainly comes from the oxides formed after the oxidation of elements contained in molten iron and scrap steel, impurities brought by metal furnace charges, slagging agents added such as limestone, fluorite, silica, oxidants, desulfurization products, and eroded furnace lining materials. According to the different furnace types used in steelmaking, steel slag is divided into converter steel slag, open hearth furnace steel slag and electric furnace steel slag. At present, the domestic steel slag processing technology is single, and crushing-magnetic separation is generally used. For example, Anshan Iron and Steel currently has a 2.4 million tons / year magnetic s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B1/00B03C1/005
Inventor 苏兴文鞠洪刚张凯宋武李毅孙德娣陈强于克旭杨成建
Owner 鞍钢绿色资源科技有限公司
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