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Process for the treatment of molybdenum concentrate

A process and technology of copper concentrate, applied in the field of copper-molybdenum concentrate treatment, can solve problems such as low recovery rate of molybdenum

Inactive Publication Date: 2005-05-04
COMINCO ENG SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for molybdenum concentrate, it is a matter of choosing between the amount of copper in the molybdenum concentrate with high copper content produced by this process and the amount of molybdenum that can be recovered. the lower the recovery rate
Therefore, copper-rich molybdenum concentrates are beneficial, but as previously pointed out, the presence of copper poses some problems with conventional processes

Method used

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  • Process for the treatment of molybdenum concentrate
  • Process for the treatment of molybdenum concentrate
  • Process for the treatment of molybdenum concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Molybdenum concentrate containing 45.2% Mo, 3.6% Cu, 3.6% Fe and 34.2% total sulfur, after pressure oxidation (solid content during pressure oxidation is 500g / L), the feed liquid used contains 15g / L Cu , 12g / L Cl, and 20g / L free acid. The pressurized oxidation was carried out at 150° C. under a total pressure of 200 psig (1480 kPa) for one hour.

[0063] After pressure oxidation, the product slurry was filtered and the residue was washed with water. The pH of the filtrate was 0.91. The filtrate contained 31.34g / L Cu, 3.64g / L Mo and 5.87g / L Fe. The extraction rates of copper and molybdenum were 96.2% and 1.6% respectively (extraction rate of copper was based on solid; extraction rate of molybdenum was based on solution).

Embodiment 2

[0065] In another experiment, the same Mo concentrate was oxidized under pressure under the same conditions as above, except that the feed liquid used did not contain free acid. The pH value of the filtrate after pressure oxidation was 1.06. The filtrate contained 33.04g / L Cu, 6.64g / L Mo and 7.24g / L Fe. The extraction rates of copper and molybdenum are 95.2% and 2.7% respectively.

Embodiment 3

[0067] In another experiment, the same Mo concentrate was oxidized under pressure under the same conditions as above. The difference is that the feed liquid used contains 30g / L free acid. The pH value of the filtrate after pressure oxidation was 1.03. The filtrate contained 30.60 g / L Cu, 3.04 g / L Mo and 6.16 g / L Fe. The extraction rates of copper and molybdenum were 94.1% and 1.3%, respectively.

[0068] It can be seen from the above three examples that the extraction rate of copper is high, while the extraction rate of molybdenum (representing the loss of molybdenum in the molybdenum concentrate) is low.

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Abstract

A method of treatment or purification of a molybdenum concentrate also containing copper, comprises the step of subjecting the molybdenum concentra te to pressure oxidation in the presence of oxygen and a feed solution containi ng copper (e.g. CuSO4) and halide (e.g. CuCl2) to produce a pressure oxidation solution containing copper and a solid residue containing molybdenum. The pressure oxidation solution may be combined with feed solution containing sulfuric acid to a second pressure oxidation in which a copper concentrate i s treated for the recovery of copper therefrom.

Description

field of invention [0001] The present invention relates to the treatment of molybdenum concentrate, and also relates to the treatment of copper-molybdenum concentrate for recovering valuable metals therein. Background of the invention [0002] Molybdenum mainly exists in molybdenite (MoS 2 ), the ore is usually low in molybdenum and also contains copper. [0003] Typically, such ores contain about 0.5-1 wt% Cu (as sulfide) and about 0.01-0.03 wt% Molybdenum, although their concentrations can vary widely. Usually the ore is processed in a concentrator into rough concentrate, which contains about 25-40% copper and about 0.3-2% molybdenum. The rough concentrate is then processed by a molybdenum separation plant to produce copper concentrate and molybdenum concentrate. The molybdenum concentrate contains about 50% molybdenum and 0.1-10% copper (calculated as CuS). Because it is sometimes difficult and costly to separate copper from molybdenum, the percentage of copper in moly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/06C22B3/10C22B3/20C22B3/26C22B3/44C22B15/00C22B34/34
CPCC22B15/0089C22B3/10C22B15/0071C22B3/06C22B3/0005C22B34/34C22B15/0069Y02P10/20C22B3/26
Inventor D·L·琼斯
Owner COMINCO ENG SERVICES
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