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Comprehensive recovery method of complex molybdenum sulphide ores

A recovery method and technology of sulfide ore, applied in the field of hydrometallurgy, can solve the problems of large alkali consumption, high energy consumption, and high cost, and achieve efficient oxidation and environmental friendliness

Active Publication Date: 2014-01-22
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electro-oxidation method can treat refractory ore and complex ore, but due to high energy consumption and high cost, there is no industrial application example at present
Alkaline pressurized oxidation method consumes a lot of alkali during leaching, and the reaction time is long. The alkaline leaching solution needs to be acidified before extraction, the production process is long, and the cost of auxiliary materials is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Composition of molybdenum minerals used in pressurized oxidation (%): Mo44.95, Re0.062, S37.00

[0029] The pressure oxidation leaching conditions are as follows: take 100g of molybdenum concentrate, add 5g of activated carbon, the liquid-solid ratio is 2:1, the pressure oxidation temperature is 105°C, the oxygen partial pressure is 800kPa, and the reaction time is 8h. Analysis of the contents of each element in the pressurized leaching slag shows that the leaching rate of molybdenum is 17.25%, the leaching rate of rhenium is 96.47%, the content of sulfuric acid in the pressurized leaching solution is 131.48g / L, and the conversion rate of molybdenum is 99.12%.

Embodiment 2

[0031] Composition of molybdenum minerals used in pressurized oxidation (%): Mo44.95, Re0.062, S37.00

[0032] The pressure oxidation leaching conditions are: take 500g of molybdenum concentrate, add 25g of activated carbon, the liquid-solid ratio is 6:1, the pressure oxidation temperature is 150°C, the oxygen partial pressure is 700kPa, and the reaction time is 4h. Analysis of the content of each element in the pressurized leaching slag shows that the leaching rate of molybdenum is 22.25%, the leaching rate of rhenium is 96.47%, the content of sulfuric acid in the pressurized leaching solution is 131.48g / L, and the conversion rate of molybdenum is 98.50%.

Embodiment 3

[0034] Composition of molybdenum minerals used in pressure oxidation (%): Mo33.06, Cu5.72, Fe11.19, Re0.012, S40.08

[0035] The pressure oxidation leaching conditions are as follows: take 100g of molybdenum concentrate, add 2.5g of activated carbon, the liquid-solid ratio is 6:1, the pressure oxidation temperature is 180°C, the oxygen partial pressure is 600kPa, and the reaction time is 2.5h. Analysis of the content of each element in the pressurized leaching slag shows that the leaching rate of molybdenum is 22.41%, that of rhenium is 96.47%, that of copper is 99.65%, and that of iron is 96.25%. The content of sulfuric acid in the pressurized leaching solution is 146.26g / L, the conversion rate of molybdenum is 98.09%.

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Abstract

The invention provides a comprehensive recovery method of complex molybdenum sulphide ores. The comprehensive recovery method is characterized that a pressurized oxidization method is used for treating complex molybdenum-containing sulfide comprising 5-45% of molybdenum, a right amount of activating agent is added, the conversion rate of the molybdenum reaches above 98% under the conditions that the temperature is 105-200 DEG C, the ratio of ore pulp to solid is (2-15):1, the oxygen partial pressure is 100-800kPa, and the reaction time is 1-8 hours, rhenium and molybdenum are recycled from a pressurized oxidization solution step by step by adopting an extraction method, and finally products such as ammonium rhenate and ammonium molybdate are produced. The comprehensive recovery method can be used for treating complex raw materials, is low in reaction temperature and pressure and is a simple high-efficiency and environment-friendly technology.

Description

technical field [0001] The invention relates to a hydrometallurgical method, in particular to a comprehensive recovery method of complex molybdenum sulfide ores. Background technique [0002] Molybdenum is a rare metal with a high melting point. It has good thermal conductivity, electrical conductivity, high temperature resistance, wear resistance and corrosion resistance. It is widely used in steel, chemical industry, electronics, aerospace, biomedicine, agriculture and national defense construction and other fields. [0003] Common natural molybdenum minerals include molybdenite, colored molybdenite, molybdenite, iron molybdenum and calcium molybdate, etc., but the mineral with the largest reserves and the most industrial value is molybdenite. At present, the industrial treatment of molybdenite mainly adopts the traditional fire roasting-ammonia leaching process. The main roasting equipment has multi-hearth furnaces and rotary kilns, etc., but the SO in the output flue gas...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/44C22B3/26C22B34/34C22B15/00C22B61/00
CPCY02P10/20
Inventor 蒋开喜王海北王玉芳张邦胜张磊李贺刘三平邹小平赵磊林江顺
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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