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Method of comprehensively recovering low-grade molybdenum from copper concentrate containing organic carbon

A technology of copper concentrate and organic carbon, applied in chemical instruments and methods, wet separation, improvement of process efficiency, etc., can solve problems such as difficult to obtain high-grade molybdenum concentrate products, poor use effect, waste of molybdenum resources, etc. , to avoid regrinding process, improve molybdenum grade and reduce leaching time

Active Publication Date: 2017-01-04
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the prior art represented by the above-mentioned patent documents is not effective for porphyry copper deposits containing organic carbon and low-grade molybdenum. The reason is that for porphyry copper deposits containing organic carbon and low-grade molybdenum, In the process of copper-molybdenum separation of associated molybdenum in copper concentrate, organic carbon and gangue minerals such as carbonate and layered silicate with organic carbon adsorbed on the surface easily enter into molybdenum concentrate, and it is difficult to obtain the grade Higher Molybdenum Concentrate Products
This low-grade molybdenum sub-concentrate product can usually only be used as a raw material for metallurgical preparation of ammonium molybdate products, but organic carbon is very easy to absorb and leach molybdate ions, which seriously affects the normal process of metallurgical preparation of ammonium molybdate. One of the main harmful elements in the process
Therefore, many concentrators usually directly sell it as a single copper concentrate or carry out copper smelting and extraction, resulting in a waste of molybdenum resources

Method used

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  • Method of comprehensively recovering low-grade molybdenum from copper concentrate containing organic carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0028] With organic carbon C content being 1.0%, the copper concentrate of Mo content 0.51% is raw material, utilizes technology of the present invention, carries out following steps, as figure 1 :

[0029] (1) Rough separation operation: For the copper concentrate containing organic carbon, first stir and adjust the pulp to control the pulp concentration to 30%, then add 20000g / t sodium thioglycolate and 150g / t diesel oil one by one, and carry out rough separation in the flotation equipment Operation, this operation obtains rougher molybdenum concentrate and rougher tailings, rougher molybdenum concentrate is used as raw material for further molybdenum concentration, and rougher tailings is used as raw material for molybdenum sweeping.

[0030] (2) Sweeping operation: use the rougher tailings as the raw material for molybdenum sweeping operation, add it to the sweeping tank for sweeping operation, first stir and adjust the slurry, and add 75g / t of diesel oil to carry out swee...

Embodiment 2

[0035] With organic C content being 1.6%, the copper concentrate of Mo content 0.38% is raw material, utilizes technology of the present invention, carries out following steps, as figure 1 :

[0036] (1) Rough separation operation: For the copper concentrate containing organic carbon, first stir and adjust the pulp to control the pulp concentration to 25%, then add 18000g / t sodium thioglycolate and 120g / t kerosene successively, and carry out rough separation in the flotation equipment Operation, this operation obtains rougher molybdenum concentrate and rougher tailings, rougher molybdenum concentrate is used as raw material for further molybdenum concentration, and rougher tailings is used as raw material for molybdenum sweeping.

[0037] (2) Sweeping operation: use rougher tailings as the raw material for molybdenum sweeping operation, add it to the sweeping tank for sweeping operation, first stir and adjust the slurry, and add 60g / t of kerosene to carry out sweeping I operat...

Embodiment 3

[0042] With organic C content being 1.2%, the high-quality copper concentrate of Mo content 0.25% is raw material, utilizes the technology of the present invention, carries out following steps, as figure 1 :

[0043] (1) Rough separation operation: For the copper concentrate containing organic carbon, first stir and adjust the slurry, control the concentration of the slurry to 20~30%, and then add 16000g / t of sodium thioglycolate and 100g / t of transformer oil successively, in the flotation equipment The roughing operation is carried out to obtain the roughing molybdenum concentrate and roughing tailings, the roughing molybdenum concentrate is used as the raw material for further molybdenum concentration, and the roughing tailings are used as the raw material for molybdenum sweeping.

[0044] (2) Sweeping operation: use rougher tailings as the raw material for molybdenum sweeping operation, add it to the sweeping tank for sweeping operation, first stir and adjust the slurry, an...

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Abstract

The invention discloses a method of comprehensively recovering low-grade molybdenum from copper concentrate containing organic carbon. The method comprises the following steps of: (1) rougher flotation operation; (2) scavenging operation; (3) concentration operation; (4) roasting operation: by taking flotation molybdenum concentrate as a raw material, adding the raw material into roasting equipment to be roasted to remove organic carbon in the molybdenum concentrate, wherein the roasting temperature is 400-600 DEG C and the roasting time is 1-3h; and (5) wet-process impurity-removal operation: by taking the roasted material as a raw material, adding the raw material into a 1-3% diluted hydrochloric acid solution, and stirring the mixture for 1-3h to remove carbonate minerals which are entrained and are not dissociated in the molybdenum concentrate, and then performing washing and filtration many times to obtain the final molybdenum oxide concentrate. The method disclosed by the invention can effectively improve the grade of the molybdenum concentrate and remove harmful element carbon in the molybdenum concentrate, avoids a re-grinding step required by guaranteeing molybdenum leaching rate in a follow-up wet-process molybdenum-extracting operation, and meanwhile, shortens the leaching time and reduces the dosage of an agent, reduces the loss of molybdate ions in organic carbon adsorption, and is remarkable in economical benefit.

Description

technical field [0001] The invention relates to the technical field of beneficiation and recovery of molybdenum in copper concentrates, in particular to a new method for comprehensively recovering low-grade molybdenum from copper concentrates containing organic carbon. Background technique [0002] Molybdenum is a silver-white rare metal, which is widely used in metallurgy, electrical, chemical, aerospace and other industries due to its advantages such as high strength, high melting point, corrosion resistance and abrasion resistance. It is an important basic material for high-tech, national modernization, and modern national defense construction. It occupies an important position in the country and plays a supporting role in the economy. [0003] Domestic molybdenum mainly comes from the production of molybdenum concentrate from a single molybdenite ore and the molybdenum concentrate recovered as an associated element from porphyry-type copper ore. For a single molybdenum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00C22B1/02
CPCB03B7/00C22B1/02Y02P10/20
Inventor 毛益林杨进忠陈晓青严伟平王秀芬
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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