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Beneficiation process of low-grade magnetite and specularite mixed ore

A technology of magnetite and specularite, which is applied in the field of ferrous metal ore mining and dressing, can solve the problems of unsuitable mixed ore dressing process, complex process flow, and high dressing cost, so as to improve the dressing efficiency, reduce energy consumption, and improve efficiency Effect

Active Publication Date: 2011-10-05
ANHUI JINRISHENG MINING
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Problems solved by technology

[0007] At present, most of the existing beneficiation processes have complicated process flow, high equipment investment and high beneficiation cost. As far as the beneficiation index is concerned, the recovery rate of domestic iron oxide ore is generally only about 70%, and it is not suitable for the magnetite and iron oxide in Zhouyoufang Iron Mine. Mineral processing technology of specularite paragenetic mixed ore

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  • Beneficiation process of low-grade magnetite and specularite mixed ore

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Embodiment Construction

[0027] Adopt ore dressing process of the present invention to carry out ore dressing to Anhui Huoqiu Zhouyoufang iron mine, concrete process is as follows:

[0028] Ore crushing process: Three-stage one closed-circuit crushing process is adopted, and the ore passes through Metso C140 jaw crusher and two Metso HP500 cone crushers for coarse crushing, medium crushing and fine crushing, and then passes through circular vibrating screen. Mining, the particle size of the crushed mineral products under the sieve is less than 12mm, which is the qualified particle size, and enters the next process, and the coarse particles on the sieve are returned to the crusher for re-crushing;

[0029] One-stage grinding and classification process: the above-mentioned crushed ore products enter the one-stage grinding and classification operation, and the closed-circuit grinding cycle is formed by an overflow ball mill and a cyclone. The overflow particle size of the first stage of classification is ...

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Abstract

The invention relates to the technical field of black metal ore exploitation and beneficiation, in particular to a beneficiation process of low-grade magnetite and specularite mixed ore, which is especially suitable for associated magnetite and specularite mixed ore of Zhouyoufang iron ore. The novel beneficiation process is realized according to an operation procedure and the process proceduressuch as ore crushing, one-stage grinding and grading, reselecting, one-stage weak magnetic separation, one-stage strong magnetic separation, two-stage grinding and grading (crude concentrate re-grinding), two-stage weak magnetic separation, two-stage strong magnetic separation, reverse floating and the like. The iron ore is comprehensively recycled, and a high-quality iron concentrate product is produced. The process has the characteristics of energy saving, high beneficiation efficiency and low beneficiation cost.

Description

technical field [0001] The invention relates to the technical field of ferrous metal ore mining and dressing, in particular to a low-grade magnetite and specularite mixed ore dressing process. This process is especially suitable for the beneficiation of the symbiotic mixed ore of magnetite and specularite in Zhouyoufang Iron Mine craft. Background technique [0002] In the 21st century, with the recovery of the world economy and the acceleration of structural adjustment, especially the rapid development of my country's economy, the continuous high growth of my country's steel industry has been driven, and my country's total steel output has ranked first in the world. At the same time, my country has become the world's largest importer of iron ore. In 2010, my country imported 620 million tons of iron ore, accounting for more than half of my country's total demand for finished iron ore. Due to the increase in the gap between the supply and demand of iron ore, the price of ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30
Inventor 牛忠育孙希乐李爱国章镇李泽彬汪孟群姚佳祥章恒兴
Owner ANHUI JINRISHENG MINING
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