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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, complicated process flow, and high dressing cost, so as to improve the dressing efficiency, reduce energy consumption, and improve efficiency Effect

Active Publication Date: 2013-03-06
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] The beneficiation process of the present invention is used to beneficiate the Huoqiu Zhouyoufang iron ore in Anhui, and the specific process is as follows:

[0028] Ore crushing process: adopting three-stage one-closed-circuit crushing process. The ore is respectively crushed by Metso C140 jaw crusher and two Metso HP500 cone crushers for coarse crushing, medium crushing and fine crushing, and then through circular vibrating screen. The crushed ore product under the sieve has a particle size of less than 12mm as a qualified particle size, and enters the next process. The coarse particles on the sieve are returned to the crusher to be crushed;

[0029] One-stage grinding and grading process: the above-mentioned crushed ore products enter the first-stage grinding and grading operation, which is composed of an overflow type ball mill and a cyclone to form a closed-circuit grinding cycle. The first stage grading overflow has a particle size of 200 mesh, accounting for about 50-55...

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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 beneficiation process. The process is particularly suitable for the beneficiation of the 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 adjustments, especially the rapid development of my country's economy, it has driven the continuous high growth of my country's steel industry, and my country's total steel output has ranked first in the world. At the same time, my country has also become the world's largest iron ore importer. In 2010, my country's imported iron ore imports reached 620 million tons, which has accounted for more than half of my country's total demand for finished iron ore. Due to the increasing gap between the supply and demand of iron ore, the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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