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Beneficiation method for effectively recovering extremely-fine-particle molybdenum ore

A mineral processing method and fine-grained technology, which is applied in the field of mineral processing for efficient recovery of molybdenum, can solve problems such as the inability to recover fine-grained molybdenum minerals

Active Publication Date: 2016-08-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mineral processing method for efficiently recovering molybdenum from fine-grained molybdenum ore, to solve the problem that the existing mineral processing methods cannot recover fine-grained molybdenum minerals, and to improve the comprehensive recovery rate of molybdenum

Method used

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  • Beneficiation method for effectively recovering extremely-fine-particle molybdenum ore
  • Beneficiation method for effectively recovering extremely-fine-particle molybdenum ore
  • Beneficiation method for effectively recovering extremely-fine-particle molybdenum ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A porphyry-type molybdenum deposit in Inner Mongolia, the metal minerals in the ore mainly include pyrite, molybdenite, magnetite, pyrrhotite, chalcopyrite, etc.; the gangue minerals mainly include quartz, potassium feldspar, and albite , Muscovite, Sericite, Biotite, etc. The raw ore contains 0.225% molybdenum, and the oxidation rate of molybdenum is 5.85%. Molybdenite is mainly micro-fine-grained molybdenite (referred to as fine-grained molybdenite). The particle size of molybdenite in ore is generally 0.005-0.030mm, and the occupancy rate of molybdenite in the -0.020mm particle size reaches 51.60. %. Such as figure 1 Shown technological process, concrete technological parameter is:

[0038] (1) Grinding process: Put the fine-grained molybdenum ore, 3000 g / ton of sodium sulfide regulator, and 1600 g / ton of diesel oil into the ball mill, add water to carry out wet grinding to obtain ore pulp, control the grinding concentration to 55%, and grind The ore fineness is ...

Embodiment 2

[0048]Inner Mongolia processes 100t / d of a certain porphyry-type molybdenum ore. The metal minerals in the ore mainly include pyrite, molybdenite, magnetite, pyrrhotite, chalcopyrite, etc.; the gangue minerals are mainly quartz, potassium Albite, albite, muscovite, sericite, biotite, etc. The raw ore contains 0.154% molybdenum, and the oxidation rate of molybdenum is 4.65%. Molybdenite is mainly micro-fine-grained molybdenite (referred to as fine-grained molybdenum ore). The particle size of molybdenite in the ore is generally 0.001-0.020mm, and the occupancy rate of molybdenite in the -0.020mm particle size reaches 60.57 %. Such as figure 1 Shown technological process, concrete technological parameter is:

[0049] (1) Grinding process: Put the fine-grained molybdenum ore, 4000 g / t sodium sulfide regulator and 1000 g / t kerosene into the ball mill, add water for wet grinding, control the grinding concentration to 55%, and the grinding fineness -0.074mm accounted for 91%.

...

Embodiment 3

[0058] A porphyry-type molybdenum deposit in Shaanxi, the metal minerals in the ore mainly include molybdenite, magnetite, pyrite, pyrrhotite, and occasionally chalcopyrite; the gangue minerals are mainly quartz, diopside, calcite, Sericite, fluorite, feldspar, chlorite, serpentine, talc and biotite, etc. The raw ore contains 0.11% molybdenum, and the oxidation rate of molybdenum is 6.52%. Molybdenite is mainly micro-fine-grained molybdenite (referred to as fine-grained molybdenum ore). The particle size of molybdenite in the ore is generally 0.010-0.10mm, and the occupancy rate of molybdenite in the -0.020mm particle size reaches 10.68. %.

[0059] Such as figure 1 Shown technological process, concrete technological parameter is:

[0060] (1) Grinding process: put the fine-grained molybdenum ore, 1000 g / t sodium sulfide regulator, and 800 g / t transformer oil into the ball mill, add water for wet grinding, control the grinding concentration to 65%, and grind fine The degre...

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Abstract

The invention discloses a beneficiation method for effectively recovering extremely-fine-particle molybdenum ore. The beneficiation method comprises the steps that a novel separation technique combining sulfur induction with oil agglomeration flotation is adopted, the surface flotation particle sizes of extremely-fine ore particles are increased through oil agglomeration, enrichment of associated metal ore is improved through sulfur induction, and thus the effect that high-recovery-rate molybdenum crude concentrate is obtained in the rough grinding stage is ensured; and in the regrinding and concentration stage, molybdenite aggregates are disaggregated under mechanical action and then enriched again with hydrocarbon oil, molybdenite is effectively separated from the associated metal ore by optimizing a reagent system, and molybdenum concentrate meeting the beneficiation indexes that the grade is higher than 30% and the recovery rate is 87% or over can be obtained. By the adoption of the beneficiation method for effectively recovering the extremely-fine-particle molybdenum ore, the problem that it is difficult to recover and reuse molybdenite with the crystal particle sizes being smaller than 0.020 mm is effectively solved.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal beneficiation, in particular to a beneficiation method for efficiently recovering molybdenum from fine-grained molybdenum ore. Background technique [0002] With the continuous development of industry, the demand for molybdenum metal has gradually increased, and molybdenum ore resources have been exploited in large quantities, especially those easy-to-select molybdenum ores are gradually exhausted. is attracting widespread attention. Because molybdenite has good natural buoyancy, foam flotation is generally used to recover molybdenite. Molybdenite belongs to the hexagonal crystal system and has a lamellar crystal structure. After crushing and grinding, it is easy to crack along the interlayer and produce in the form of flakes or plates, forming a non-polar hydrophobic "surface" and polar hydrophilic "Prism". Larger molybdenite particles are generally considered to be naturally hydroph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 顾帼华林清泉王晖
Owner CENT SOUTH UNIV
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