Ore dressing method and ore dressing system suitable for lean magnetite ores

A beneficiation method and technology of lean magnetite, which is applied in the process flow and the change rule of process parameters, iron ore crushing and beneficiation equipment, can solve the problems of large amount of medium ore, large amount of regrind in the return process, and high grade.

Active Publication Date: 2013-04-17
TAIYUAN IRON & STEEL GROUP
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Problems solved by technology

[0004] The disadvantages of using the prior art beneficiation method are: the efficiency of crushing and dry magnetic separation is low, the crushing particle size is coarse, the secondary grinding and classification cycle load is large, and the magnetic gravity separation does not play its due separation efficiency. The grade is difficult to control, the amount of medium ore is large, the grade is high, and the amount of regrinding in the return process is large

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  • Ore dressing method and ore dressing system suitable for lean magnetite ores
  • Ore dressing method and ore dressing system suitable for lean magnetite ores
  • Ore dressing method and ore dressing system suitable for lean magnetite ores

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Embodiment approach

[0143] As a specific implementation, after the products under the high-frequency fine sieve pass through the elutriation machine (model CH-CXJ24000, 13 sets) to further improve the concentrate grade (the ore feeding amount of the elutriation machine is 23~29t / h, and the ore concentration is ≥ 30%, feed particle size 0~0.045mm%≥75%), concentrate product particle size 0~0.045mm≥75%, concentration 26~29%, grade ≥66%.

[0144] In a specific embodiment, the parameters of the elutriation machine are: 1.80A current in the fixed magnetic field; 2.80A circulating magnetic field current, automatic adjustment; 4 seconds cycle time; three-way circulation; new water rising speed 5.05cm / s Under certain conditions, the grade of total iron in concentrates separated by magnetic gravity separation equipment can reach more than 66%, which is more than 3% higher than that before parameter optimization.

[0145] Preferably, the following steps are also included after the ninth magnetic separation ...

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Abstract

The invention relates to an ore dressing method and ore dressing system suitable for lean magnetite ores. The ore dressing method comprises the following steps: (1), four crushing treatments, wherein magnetic separation treatment is carried out on the ores after the last two crushing treatments; and (2), a plurality of staged treatments including grinding, classifying and magnetically separating the ore powder at the plurality of stages in circulation. The invention provides a mixed ore enriching method for lean ores, interlayer ores, recovered ores and the like; therefore, resource waste is reduced, the pressure of a waste-rock yard is reduced, the benefits are increased and purposes of turning waste into wealth, saving energy and reducing emission are achieved.

Description

technical field [0001] The invention belongs to the iron ore crushing and magnetic separation mineral processing process technology, specifically including iron ore crushing and mineral processing equipment, process flow and process parameter variation rules. Background technique [0002] In China, the beneficiation process has been basically finalized. Generally, the crushing process has formed a closed-circuit process of three-stage crushing and vibrating screen screening; the grinding process has formed a four-stage grinding and classification five-stage weak magnetic separation process. More crushing and less grinding, dry magnetic separation process, crushing particle size vibration screening, cyclone fine particle classification, magnetic gravity separation and other technologies are widely used in metallurgical mines, but the properties of each ore are different and the application conditions are different. Copying and copying will not play a role in improving efficie...

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Application Information

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IPC IPC(8): B03C1/30
Inventor 何铁牛王志东刘慈光陈会武席玉明张永利闫正鹏高键高晓梅
Owner TAIYUAN IRON & STEEL GROUP
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