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Experimental study of Southeast Asian iron ore beneficiation process

Author: ZhangHongWei
Tutor: ZhouPing
School: Kunming University of Science and Technology
Course: Mineral Processing Engineering
Keywords: Magnetite ore Concentrate sulfur reduction Single magnetic separation Stage grinding
CLC: TD951
Type: Master's thesis
Year: 2009
Downloads: 69
Quote: 0
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Abstract


Domestic iron ore far can not meet the needs of the development of China's iron and steel industry, resulting in constantly increasing dependence on imported iron ore in China. With the development of economic globalization, it is conducive to our worldwide allocation of resources, the implementation of the development of the mineral resources of the globalization strategy. Southeast Asia mineral resources belong to the world's attention is one of the enrichment zone, geological exploration and mineral development in these countries is relatively low due to historical and practical reasons. Currently is working to attract foreign capital and technology, and the development of domestic mineral resources, and this is precisely provides a rare opportunity for China's iron and steel enterprises involved in the field of mineral development. Kunming, Yunnan Province, the largest iron and steel enterprises and large state industrial enterprises Steel Holdings Limited. The development of iron ore resources in Southeast Asia to build a unique core competitiveness of enterprises, to achieve new breakthroughs in business enterprise internationalization, is another major step for the implementation of the development strategy in Southeast Asia \The subject It is in this context that the Southeast Asian iron ore beneficiation process research has a very important practical significance. Southeast Asian iron ore iron in the form of magnetite, containing a small amount of hematite and limonite ore averaging 36.91% Fe. Ore in the harmful elements higher sulfur content, the sulfur in the ore exists in the form of pyrite, were euhedral and magnetite with students closely, part wrapped and magnetite mutual, the sulfur content of 1.42%. The test optional studies have shown: the easy recovery of the ferromagnetic iron ore in the ore, weakly magnetic iron minerals are more difficult to recycle, and weak magnetic tailings intensity magnetic separation does not make sense; weak magnetic concentrate a higher sulfur content, weak magnetic - flotation process may result in a long process, recoveries reduce the problem. Sorting magnetite magnetic separator is the most economical, simple, and the lightest environmental pollution beneficiation methods, embedded Bute point for the iron ore iron minerals, increased by grinding monomer dissociation degree of iron minerals using The magnetic separation process to achieve the purpose of lowering sulfur and improve concentrate grade. Through a series of weak magnetic separation process test: to determine the optimum magnetic field strength of 0.1T;, fine grinding is the key to high-grade iron ore concentrate, concentrate sulfur content decreased with the improvement of the grinding fineness. Using a period (several times) the grinding process, the grinding fineness greater than 90% -200 mesh is appropriate; using a two-stage grinding processes, improve concentrate grade and lower sulfur content must be finely ground, and the second mill fineness must also reach more than 90% -200 mesh, weak magnetic concentrate grade higher than for some (many times) grinding weak magnetic concentrate grade, but the recovery rate to greater losses. Eventually through the study of the test, to determine the scientific and reasonable single weak magnetic separation beneficiation process, the process is simple, low operating cost, reliable technology. The continuous grinding a rough a fine low intensity magnetic separation processing raw ore grade of 36.89% and 62.94% iron grade, the sulfur content of 0.22% of the iron ore concentrate, refined mineral rate and recovery rate of 47.73% and 81.44%, respectively. Using a two-stage grinding weak magnetic separation process processing grade for 37.25% of the ore, you can get the iron grade of 64.17%, the iron concentrate sulfur content of 0.18%, the rate of fine mineral recoveries were 45.74% and 78.80%. The research and development of mineral processing technology has entered the stages of design and build factories, and has a certain practical significance.

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CLC: > Industrial Technology > Mining Engineering > Beneficiation > Metallic Ore Dressing > Black Metallic Ore Dressing
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