Beneficiation method for improving comprehensive recovery indexes of complex low-grade molybdenum polymetallic ores

A technology of polymetallic minerals and mineral processing methods, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problem of low level of resource utilization, difficulty in obtaining separation indicators, and comprehensive recovery of copper minerals and sulfur minerals and other problems, to achieve the effect of excellent comprehensive recovery index, ideal selectivity, and avoiding the decline of floatability

Active Publication Date: 2019-12-10
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Abstract
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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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  • Beneficiation method for improving comprehensive recovery indexes of complex low-grade molybdenum polymetallic ores
  • Beneficiation method for improving comprehensive recovery indexes of complex low-grade molybdenum polymetallic ores
  • Beneficiation method for improving comprehensive recovery indexes of complex low-grade molybdenum polymetallic ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1. Ore characteristics

[0056] In a fine-crystalline low-grade molybdenum ore in Henan, the molybdenum grade is 0.12%, the copper grade is 0.037%, and the sulfur grade is 2.31%, all of which are low in content. The molybdenite in the ore is mainly in the form of sparse disseminated structure or star point structure. The embedded type of molybdenite is mainly in the form of thin slabs, needles and columns wrapped by quartz, with small particle size; chalcopyrite mainly It is inhomogeneous and small stars embedded in the gangue grains and holes, with a particle size of 0.02~0.05mm; the pyrite is mainly in the form of euhedral-semi-auto-shaped monomers embedded in the gangue particles The particle size is between 0.1mm and 0.7mm in the gaps and cracks. The pyrite often contains chalcopyrite or fine-grained pyrrhotite. The above ore characteristics make it difficult to separate and recover the sulfide minerals in the low-grade molybdenum ore.

[0057] 2. Beneficiation method ...

Embodiment 2

[0075] 1. Ore characteristics

[0076] In a fine-crystalline molybdenum ore in Xinjiang, the molybdenum grade is 0.18%, the copper grade is 0.031%, and the sulfur grade is 1.98%. The sulfide content is relatively low, and the molybdenum has a certain degree of oxidation, with an oxidation rate of about 3%. The molybdenite in the ore is covered by quartz in the form of thin plates and needles, with fine particle size; the chalcopyrite has a fine grain size and is closely related to the gangue minerals; pyrite often contains emulsion chalcopyrite or The comprehensive recovery of fine-grained pyrrhotite is difficult.

[0077] 2. Beneficiation method

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

[0079] (2) Molybdenum roughing / sweeping: adding 70 g / ton of molybdenum combined collector and 2...

Embodiment 3

[0095] The ore characteristics and beneficiation steps of this example are the same as those of Example 1. The difference lies in the different dosages of reagents in the molybdenum roughing / sweeping, molybdenum beneficiation, copper beneficiation, sulfur roughing / sweeping, and sulfur beneficiation steps. ; The drug content of each step is:

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

[0097] Molybdenum selection: The dosage of each molybdenum selection and copper combination inhibitor is 450 g / ton of ore, the amount of collector kerosene is 4 g / ton of ore, and the dosage of 2-hexanol is 2 g / ton of ore;

[0098] Copper beneficiation: The amount of copper sulfate used for each copper beneficiation is 60 g / ton of raw ore, and the amount of c...

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Abstract

The invention discloses a beneficiation method for improving comprehensive recovery indexes of complex low-grade molybdenum polymetallic ores, and particularly relates to comprehensive recovery of valuable elements such as molybdenum, copper and sulfur in low-grade molybdenum ores. According to the method, the effective flotation separation of molybdenite, chalcopyrite and pyrite can be realized,and the comprehensive recovery indexes of the low-grade molybdenum ores are improved. The method comprises the following steps of primary ore grinding, molybdenum (molybdenite) flotation, secondary ore grinding (rough molybdenum copper concentrate regrinding), copper (chalcopyrite) flotation, and sulfur (pyrite) flotation. The method is stable and effective in reagent regime and beneficiation process flow and high in adaptability. By using the beneficiation method, high-quality molybdenite, chalcopyrite and pyrite are obtained from the complex, difficult-to-select and low-grade molybdenum polymetallic ore with associated copper/ sulfur, and the comprehensive recovery indexes of sulfide minerals are excellent. The adopted reagent is non-toxic and harmless, has little influence on the environment, and is an excellent beneficiation method.

Description

Technical field [0001] The invention belongs to the technical field of beneficiation of polymetallic sulfide ore, and specifically 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 symbolizes the level of national industrial development. Molybdenum metal in particular, with the development of high-tech, especially in the field of microelectronics and military industry, molybdenum will become a very important metal material and strategic material, which has important strategic and economic significance. Therefore, molybdenum and copper are related to the national economy. Development is closely related. Due to the excessive exploitation of molybdenum and copper ore in my country, the existing molybdenum and copper ore grades in our country are low, and the composition of the ore is complicated, and the ass...

Claims

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Application Information

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Patent Type & Authority Applications(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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