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Method for recovering ilmenite from dense difficult to dissociate vanadium titano-magnetite

A vanadium-titanium magnetite and titanium recovery technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., to achieve good recovery effect, reduce loss, and simple steps

Inactive Publication Date: 2014-01-08
SICHUAN JINGDA MINING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention overcomes the above-mentioned deficiencies, provides a pollution-free, low-cost method for recovering ilmenite from two-stage grinding and two-stage magnetic separation, and solves the problems caused by gravity separation-magnetic separation-electric separation or flotation in the prior art. environmental or cost issues

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  • Method for recovering ilmenite from dense difficult to dissociate vanadium titano-magnetite

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Titanium-containing minerals are mainly titanomagnetite and ilmenite, and gangue minerals are mainly quartz, ordinary pyroxene and plagioclase. The original ore of vanadium-titanium magnetite is crushed and evenly divided to below -2mm, and the grinding concentration is 50%-60%. After a stage of grinding, a stage of magnetic separation and demagnetization are carried out to obtain a section of iron coarse concentrate and a section of tailings , a section of tailings is used as titanium ore for beneficiation.

[0045] The first-stage iron coarse concentrate is subjected to the second-stage grinding, and then the second-stage magnetic separation is carried out to obtain the iron concentrate and the second-stage tailings, and the second-stage tailings are used as ore for titanium selection.

[0046] After the tailings of the first stage are sorted, the ilmenite concentrate I is obtained.

[0047] After the tailings of the second-stage magnetic separation are sorted, the i...

Embodiment 2

[0050] Using vanadium-titanium magnetite in Quebec, Canada, its raw ore grade is Fe 44.16%, TiO 2 10.87%, the ore is characterized by extremely fine particle size, difficult to dissociate, and requires fine grinding. Crushing and screening the vanadium-titanium-magnetite raw ore to -2mm, after a stage of grinding, the fineness of the vanadium-titanium-magnetite raw ore is ground to -0.074mm, and the vanadium-titanium-magnetite ore with a fineness of -0.074mm accounts for 73.01 %.

[0051] Under the condition of the magnetic field strength of 0.10-0.18T, the vanadium-titanium ferromagnetite with a fineness of -0.074mm is wet magnetically separated, and the demagnetizer is demagnetized under the condition of the field strength of 150-165KA / m to obtain a section Iron coarse concentrate, the Fe grade of this section of iron coarse concentrate is 51.74%, the recovery rate is 94.48%, and the tailings of the first section are used as ore for titanium selection.

[0052]The first-st...

Embodiment 3

[0057] The original ore of Jinping vanadium-titanium magnetite in Yunnan contains 36.10% Fe, TiO 2 8.44%, the ore is characterized by fine particle size embedded distribution, difficult dissociation, need fine grinding. Crushing and screening the vanadium-titanium magnetite raw ore to -2mm, after a stage of grinding, the fineness of the vanadium-titanium magnetite raw ore is ground to -0.074mm, and the vanadium-titanium ferromagnetic ore with a fineness of -0.074mm accounts for 70.55 %.

[0058] Under the condition that the magnetic field intensity is 0.10-0.18T, the vanadium-titanium ferromagnetite with a fineness of -0.074mm is magnetically separated to obtain a section of iron coarse concentrate, the Fe grade of this section of iron coarse concentrate is 53.56%, and the recovery The rate is 90.32%, and the first section of tailings is used as titanium ore for beneficiation.

[0059] The first-stage iron coarse concentrate is ground in the second stage until the grinding f...

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Abstract

The invention discloses a method for recovering ilmenite from dense difficultly to dissociate vanadium titano-magnetite. According to the method, by ways of two-stage ore grinding, two-stage magnetic separation, and demagnetizing after one-stage magnetic separation, the fineness and proportion of ores in each step are controlled, so that the wastage of dressing devices can be reduced, the service lives of devices can be prolonged, and the investment of dressing plants can be saved; on the premise that iron ore concentrates are required to be subjected to fine grinding, through staged ore grinding, magnetic separation and demagnetizing, a problem that the finenesses of recovered iron and titanium have less possibility of being concurrently considered is solved, the recovery rates of iron and titanium are improved, and considerable economic benefits are created for mining enterprises; finally, according to the method, in the process of ilmenite recovery, the requirements of magnetic separation and flotation on the particle size of ores are avoided, and multiple devices are directly adopted for gravity concentration, so that an effect of environmental friendliness, cleanness and no pollution is achieved in the process of production, and a foundation is laid for the building of green mines.

Description

technical field [0001] The invention relates to a method for recovering ilmenite, in particular to a method for recovering ilmenite from dense refractory titanomagnetite, and belongs to the technical field of mineral processing engineering. Background technique [0002] For now, the utilization rate of vanadium-titanium magnetite mineral resources is still low, especially the comprehensive recovery rate of titanium is only about 30%. The problem of the recovery rate of vanadium-titanium magnetite is mainly due to the difficulty of taking into account the problem of grinding fineness in the process of recycling vanadium-titanium magnetite. The grinding fineness is generally finer when recovering titano-magnetite, while the recovery of ilmenite requires a coarser particle size. In order to improve the recovery rate of iron resources, the fineness of the ore can only be increased, which not only leads to excessive crushing of the ilmenite and reduces the recovery rate of the i...

Claims

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Application Information

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IPC IPC(8): B03C1/30B03B7/00
Inventor 严志明汤小军周怡玫陈金花赵强徐国栋
Owner SICHUAN JINGDA MINING TECH
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