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Process for processing low grade hematite ore

A hematite and low-grade technology, which is applied in the process field of processing low-grade hematite ore, can solve the problems of affecting the concentrate grade, high operating cost, and complicated influencing factors, and achieves significant economic and social benefits and improves Concentrate grade, effect of simplified flotation process

Active Publication Date: 2012-08-22
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0002] In recent years, in the separation process of hematite, a major technological breakthrough has been made in the grinding-medium-weak strong magnetic-reverse flotation process, which has reached an ideal technology with a concentrate grade of 67.5% and a metal recovery rate of more than 75%. Indicators, the original flotation process has a rough and three scans, a long process, many control points, complex influencing factors, difficult to control, high operating costs, resulting in a significant drop in concentrate grade and metal recovery rate
On the one hand, it affects the improvement of the concentrate grade, on the other hand, it causes the loss of mineral resources

Method used

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  • Process for processing low grade hematite ore
  • Process for processing low grade hematite ore

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Embodiment Construction

[0022] The specific implementation manner of the present invention will be described below in conjunction with the embodiments shown in the accompanying drawings.

[0023] Such as figure 1 As shown, the process for processing low-grade hematite ore of the present invention adopts ball mill, classifier, reverse flotation, and positive flotation, and is characterized in that after the ore is ground to achieve monomer separation and the pulp is coarsely and subdivided, The coarse-grained ore pulp is re-selected-strong magnetic-screened to obtain part of the concentrate, and the fine-grained ore pulp enters the mixing tank for sample separation, and then enters the second mixing tank to add medicine and mix it, and pump it to a rougher flotation Column selection, the bottom flow of the flotation column is sent to the selection flotation column, the bottom flow of the selection flotation column is the final iron concentrate, the roughing foam of the flotation column is pumped to th...

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Abstract

The invention belongs to the technical field of preparing low grade hematite ore, in particular to a process for processing a low grade hematite ore. The process comprises the following steps: the ore is ground until monomer separation and then coarse and fine classification is carried out on pulp; coarse grain pulp is subject to reselecting, ferromagnetism and sieving to obtain a part of the concentrate; the fine grain pulp is conveyed to a mixing tank for separating sample, and then is conveyed to a second mixing tank to be mixed with medicine for size mixing; the mixture is pumped to a rough flotation column; the under flows of the rough flotation column is fed to a cleaning flotation column, the under flow of the cleaning flotation column is the ultimate iron ore concentrate; foam of the rough flotation column is conveyed to an one-stage scavenging flotation column by a pump; the under flow of the one-stage scavenging flotation column and the foam of the cleaning flotation column are mixed and return to the rough flotation column, and products of the one-stage scavenging flotation column are final tailings. The process has the beneficial effects of smaller occupation area by replacing a flotation machine with the flotation column, can recycle fine-grade valuable mineral effectively, improve the ultimate concentrate grade, provides reference significance for the mineral separation of the ore of the same type in China, and has obvious economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of beneficiation of low-grade hematite ore, in particular to a process for processing low-grade hematite ore. Background technique [0002] In recent years, in the separation process of hematite, a major technological breakthrough has been made in the grinding-medium-weak strong magnetic-reverse flotation process, which has reached an ideal technology with a concentrate grade of 67.5% and a metal recovery rate of more than 75%. For indicators, the original flotation process is rough and three-sweeping, the process is long, there are many control points, the influencing factors are complex, difficult to control, and the operating cost is high, resulting in a sharp drop in concentrate grade and metal recovery rate. On the one hand, it affects the improvement of the concentrate grade, and on the other hand, it causes the loss of mineral resources. Contents of the invention [0003] The purpose of the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B5/62
Inventor 姚强王红艳薛敏韦锦华
Owner ANSTEEL GRP MINING CO LTD
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