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A beneficiation method for improving the comprehensive recovery index of complex low-grade molybdenum polymetallic ore

A technology of polymetallic ore and mineral processing methods, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the difficulty of collector xanthate to increase the separation of copper and molybdenum, the difficulty of sulfuric acid transportation and storage, and increase the operation Cost and other issues

Active Publication Date: 2021-09-14
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the cyanide used in the early stage, common and industrially applied inorganic inhibitors sodium sulfide and low-molecular organic inhibitors sodium thioglycolate and BK511 of the North Mining Institute, etc., or a combination of inorganic and organic inhibitors), but generally not Considering the comprehensive recovery of pyrite in the ore, and the addition of collector xanthate will greatly increase the difficulty of the next separation of copper and molybdenum, and it is difficult to obtain effective separation indicators
The conventional sulfur selection process uses sulfuric acid or copper sulfate as a regulator, butyl sodium xanthate as a collector, No. 2 oil as a foaming agent, and no inhibitor is used. Difficulties in transportation and storage increase operating costs
Chinese invention patent (Application No. 201510797710.6) discloses a beneficiation method for molybdenum-containing low-grade mixed copper ore. In the copper-molybdenum mixed flotation operation, the combination of butyl xanthate and high-efficiency collector M201 is used, and the inhibitor F- 6 Suppresses copper minerals and achieves the separation of copper and molybdenum, but does not involve the separation of molybdenum and sulfur and the recovery of pyrite flotation
Especially for molybdenum polymetallic ores with extremely low copper content, conventional flotation technology is difficult to obtain better comprehensive recovery indicators of molybdenum, copper, and sulfur at the same time, and usually only recovers molybdenum minerals, copper minerals, and sulfur in the ore to a certain extent. Minerals have not been comprehensively recovered, and the level of resource utilization is very low

Method used

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  • A beneficiation method for improving the comprehensive recovery index of complex low-grade molybdenum polymetallic ore
  • A beneficiation method for improving the comprehensive recovery index of complex low-grade molybdenum polymetallic ore
  • A beneficiation method for improving the comprehensive recovery index of complex low-grade molybdenum polymetallic ore

Examples

Experimental program
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Effect test

Embodiment 1

[0055] 1. Ore characteristics

[0056] The grades of molybdenum in a fine-crystalline low-grade molybdenum ore in Henan are 0.12%, copper 0.037%, and sulfur 2.31%, all of which are relatively low. The molybdenite in the ore is mainly in the form of sparse disseminated structure or star point structure. The molybdenite is mainly distributed in the form of thin plates, needles and columns wrapped in quartz, and the particle size is small; chalcopyrite mainly Embedded in the gangue grains and pores in the form of uneven fine stars, with a particle size between 0.02 and 0.05 mm; pyrite is mainly embedded in the gangue grains in the form of euhedral-semi-euhedral-other-shaped monomers In the gaps and crevices, the particle size is between 0.1 and 0.7mm, and pyrite often contains emulsion-shaped chalcopyrite or fine-grained pyrrhotite. The above ore characteristics bring difficulty to the separation and recovery of sulfide minerals in the low-grade molybdenum ore.

[0057] 2. Mine...

Embodiment 2

[0075] 1. Ore characteristics

[0076] The molybdenum grade in a fine-crystalline molybdenum ore in Xinjiang is 0.18%, copper grade is 0.031%, sulfur grade is 1.98%, the sulfide content is low, and the molybdenum has a certain degree of oxidation, and the oxidation rate is about 3%. The molybdenite in the ore is wrapped by quartz in the shape of thin plates and needle columns, and the particle size is fine; the chalcopyrite intercalation has a fine particle size, which is closely related to the gangue mineral embedding; pyrite often contains milky chalcopyrite or chalcopyrite Fine-grained pyrrhotite is difficult to comprehensively recover.

[0077] 2. Mineral processing method

[0078] (1) Preparation of the floating material and one-stage grinding: the molybdenum polymetallic ore is ground, and the particle size of the obtained floating material is -74 μm, which accounts for 72% of the total weight of the floating mineral;

[0079] (2) Molybdenum roughing / sweeping: add the ...

Embodiment 3

[0095] The ore characteristics and beneficiation steps of this embodiment are all the same as those in Example 1, the difference being that the dosages of agents in the molybdenum roughing / sweeping, molybdenum beneficiation, copper beneficiation, sulfur roughing / sweeping, and sulfur beneficiation steps are different ; The medicament content of each step is respectively:

[0096] Molybdenum roughing / sweeping: the amount of molybdenum combined collector for molybdenum roughing is 50 g / ton of raw ore, the amount of foaming agent 2-hexanol is 15 g / ton of raw ore, and the molybdenum combined collector for molybdenum sweeping is Consumption is 10 grams / ton raw ore, and the consumption of foaming agent 2-hexanol is 35 grams / ton raw ore;

[0097] Molybdenum beneficiation: the amount of molybdenum beneficiation copper combined inhibitor is 450 g / ton raw ore, the amount of collector kerosene is 4 g / ton raw ore, and the dosage of 2-hexanol is 2 g / ton raw ore;

[0098] Copper beneficiati...

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Abstract

The invention discloses a beneficiation method for improving the comprehensive recovery index of complex low-grade molybdenum polymetallic ore, and specifically relates to the comprehensive recovery of valuable elements such as molybdenum, copper and sulfur in low-grade molybdenum ore. The method can realize the effective flotation separation of molybdenite, chalcopyrite and pyrite, and improve the comprehensive recovery index of low-grade molybdenum ore. The present invention comprises the following steps: primary grinding, molybdenum (molybdenite) flotation, secondary grinding (molybdenum-copper rough concentrate regrinding), copper (chalcopyrite) flotation, sulfur (pyrite) flotation . The medicament system and ore dressing process of the invention are stable, effective and adaptable. Using the beneficiation method of the present invention, high-quality molybdenite, chalcopyrite and pyrite can be obtained from such complex and refractory low-grade molybdenum polymetallic ores with associated copper / sulfur, and the comprehensive recovery index of sulfide minerals is excellent. The chemicals used are non-toxic and harmless, and have little impact on the environment. It is an excellent mineral processing method.

Description

technical field [0001] The invention belongs to the technical field of polymetallic sulfide ore beneficiation, and in particular relates to a beneficiation method for improving the comprehensive recovery index of complex low-grade molybdenum polymetallic ore. Background technique [0002] Molybdenum is a national strategic reserve resource, while copper marks the level of national industrial development. Especially molybdenum metal, with the development of high technology, especially in the field of microelectronics and military industry, molybdenum will become an extremely important metal material and strategic material, which has important strategic and economic significance. Therefore, molybdenum and copper are closely related to the national economy. development are closely related. Due to the over-exploitation of molybdenum and copper ores in my country, the grades of existing molybdenum and copper ores in China are low. In addition, the composition of the ores is comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B9/00B03D1/018B03D1/012B03D101/02B03D101/06B03D103/02
CPCB03B7/00B03B9/00B03D1/012B03D1/018B03D2201/02B03D2201/06B03D2203/02
Inventor 赵开乐闫武王晓慧廖祥文陈炳炎
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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