Ore dressing method of low-grade scheelite

A beneficiation method and scheelite technology, applied in flotation, solid separation and other directions, can solve the problems of toxicity, high cost of lead nitrate, benzhydroxamic acid, and high cost of sulfated oleic acid soap, and can reduce the dosage and cost, the effect of reducing the amount of flotation beneficiation and reducing the cost of beneficiation

Inactive Publication Date: 2012-10-24
广东省资源综合利用研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technical solution is that the cost of lead nitrate and benzohydroxamic acid is relatively high, and they have certain toxicity.
The weak point of this technical scheme also is that the medicament cost of sulfated oleic acid soap is higher

Method used

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  • Ore dressing method of low-grade scheelite
  • Ore dressing method of low-grade scheelite
  • Ore dressing method of low-grade scheelite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Low-grade flotation tailings from a molybdenum-copper mine in Guangdong (WO 3 0.063%) of scheelite, particle size composition -0.074mm accounts for 75%, it is suitable for gravity separation to throw tailings, gravity separation of scheelite coarse concentrate to remove magnetite and sulfide minerals, and then roughing scheelite at room temperature and scheelite Warming selection.

[0020] Gravity separation and tailings discarding: the spiral concentrator is used as the material gravity separation equipment of -1.0mm particle size, and 64.69% of the tailings are discarded by gravity separation, and the grade of gravity concentration is increased to WO 3 0.14%, recovery rate 79.26%.

[0021] Magnetic separation iron removal: iron removal under the magnetic induction intensity of 2000Gs.

[0022] Sulfide ore flotation: According to the amount of chemicals listed in Table 1, carry out sulfide ore flotation on iron ore tailings to obtain sulfide ore flotation concentra...

Embodiment 2

[0028] Medium and low-grade tailings of a molybdenum-copper-tungsten mine in Yunnan (WO 3 0.092%) of scheelite resources, the main tungsten mineral is scheelite. A very small amount of pyrite, chalcopyrite, galena and other sulfide minerals. Other gangue minerals are mainly muscovite and calcite. Tailings particle size composition -0.074mm accounted for 70%. It is suitable to use gravity separation to throw tailings, gravity separation of scheelite rough concentrate to remove magnetite and sulfide minerals, and then carry out scheelite normal temperature rough separation and scheelite heating and concentration.

[0029] Gravity separation and tailings throwing: use spiral concentrator as -1.0mm particle size material gravity separation equipment, gravity separation throws away 68.54% of tailings, and the grade of gravity separation concentrate is raised to WO 3 0.25%, the recovery rate is 84.50%.

[0030] Magnetic separation iron removal: iron removal under the magnetic ...

Embodiment 3

[0037] Medium and low-grade tailings of a skarn-type plate-shaped copper, bismuth, molybdenum, sulfur, and tungsten mine in Gansu (WO 3 0.14%) of scheelite resources, scheelite is the main recovery of useful minerals in tailings. Tailings particle size composition -0.074mm accounted for 80%. It is suitable to use gravity separation to throw tailings, gravity separation of scheelite rough concentrate to remove magnetite and sulfide minerals, and then carry out scheelite normal temperature rough separation and scheelite heating and concentration.

[0038] Gravity separation and tailings discarding: the spiral concentrator is used as the material gravity separation equipment of -1.0mm particle size, and 60.78% of the tailings are discarded by gravity separation, and the grade of gravity concentration is increased to WO 3 0.27%, recovery rate 71.93%.

[0039] Magnetic separation iron removal: iron removal under the magnetic induction intensity of 1000Gs.

[0040] Sulfide ore ...

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Abstract

The invention relates to an ore dressing method of a low-grade scheelite, which is characterized by comprising the following steps: 1. tailing discard by gravity concentration; 2. iron removal by magnetic separation; 3. sulfide ore flotation; 4. normal-temperature rougher flotation of scheelite; and 5. heating concentration of the scheelite. The invention provides a lower-cost ore dressing method for dressing scheelite concentrates from the tailings of the low-grade scheelite. The invention has the characteristics that the comprehensive recovery cost is saved, the beneficiation feed grade of the scheelite is improved, the flotation feed ore quantity is reduced, the dosage of a flotation reagent is reduced, the used ore dressing reagent is more friendly to the environment, and secondary pollution can not be caused. The method of the invention is applicable for low-grade scheelite resources with 0.03 to 0.15 percent of WO3.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a beneficiation method of low-grade scheelite. Background technique [0002] my country is a big tungsten-producing country, with tungsten resource reserves of 5.2 million tons, which is more than three times the total reserves (1.3 million tons) of 30 tungsten-producing countries, and its output and export volume both rank first in the world. Due to historical reasons and technical limitations, the utilization rate of scheelite resources is less than 50%, and a large amount of scheelite is lost in tailings. With the continuous mining of tungsten-containing polymetallic mines, the stock of tailings is getting bigger and bigger, which not only takes up a lot of land, but also pollutes the environment. Therefore, it is of great significance to recover low-grade scheelite from tailings. Usually, the ore grade WO 3 > 0.15% scheelite, the conventional flotation method can also obtain ec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D101/02B03D103/02
Inventor 高玉德韩兆元王国生徐晓萍邹霓
Owner 广东省资源综合利用研究所
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