Production method of high-quality ultrapure fine iron powder
A production method and technology for ultra-pure iron, which are applied in the fields of mining and metallurgical engineering beneficiation, can solve the problems of high impurity content of iron powder and difficult to control silicon dioxide content, and achieve the effect of less impurities and high grade.
Inactive Publication Date: 2020-05-15
周伟永
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Problems solved by technology
Although this beneficiation process can obtain iron fine powder with a grade of 70%, the iron fine powder has high impurity content and the content of silicon dioxide is difficult to control
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[0038] 1. Production process
[0039] The ore of a certain mine is mainly composed of magnetite, mainly hornblende quartz magnetite, quartz magnetite, ferrite quartz magnetite, actinoquartz magnetite, biotite garnet quartz magnetite, tremolite quartz magnetite. The chemical composition of the ore is relatively simple. Except for the main component iron, there are very few associated components. The semi-quantitative spectral analysis of the concentrate part of the ore dressing has not found any valuable elements, and the content of harmful components is also very low. The minimum TFe content in the ore is 20% and the maximum is 50.70%. According to the results of spectral analysis, combined analysis and chemical (full) analysis of the main ore types obtained, the average content of TiO2 and MnO is 0.153% and 0.077%, respectively. According to industrial index measurement and beneficiation tests, it is known that there is no recycling value. The content of associated harmful c...
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Abstract
The invention discloses a production method of high-quality ultrapure fine iron powder. Raw ore is subjected to three-stage crushing and two-stage grinding, and ordinary fine iron powder having a grade of 64-68% is obtained through magnetic separation. The ordinary fine iron powder is subjected to one-stage grinding and coarse and fine two-stage separation, selected fine iron powder is elutriatedand then subjected to reverse flotation with dodecylamine as a collecting agent, and obtained fine iron powder is the ultrapure fine iron powder having a grade of 71.5-72% and a silicon dioxide content less than 0.20%. Tailings after elutriation and reverse flotation have a grade greater than 60% and can be sold as ordinary fine iron powder. Through the processes of magnetic separation, reverse flotation and the like in the technology, the production of the ultrapure fine iron powder is achieved, the content of silicon dioxide is effectively controlled, and the ultrapure fine iron powder is high in grade and small in impurity content and is an ideal raw material of reduced iron powder.
Description
Technical field: [0001] The invention belongs to the technical field of mineral processing of mines and metallurgical engineering, and relates to a production method of ultra-pure iron fine powder, which is suitable for the mineral processing process of magnetite. Background technique: [0002] my country is the largest steel producer in the world, but the production of clean steel and high-quality steel in my country is far behind advanced industrialized countries. The variety, quantity and quality of clean steel and high-quality steel are far from meeting the needs of national economic development and national defense construction. The "short board" of my country's steel industry. Ultra-pure iron powder is mainly used in the production of metallized pellets, direct rolling steel, magnetic materials, wastewater treatment, chemical pigments, batteries, high-purity sponge iron, smelting special steel, production of liquid pig iron by smelting reduction, powder metallurgy, etc....
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Patent Timeline
Login to View More IPC IPC(8): B03B1/00B03B7/00B03B9/00B02C23/00B02C23/08B03C1/02B03D1/01B03D101/02
CPCB02C23/00B02C23/08B03B1/00B03B7/00B03B9/00B03C1/02B03D1/01B03D2201/02
Inventor 周伟永黄杨黄益华
Owner 周伟永