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Treating method for complex copper-molybdenum deposit

A processing method and technology for copper-molybdenum ore, which are applied in the field of complex copper-molybdenum ore processing, can solve the problems of increased smelting cost, high production cost, large alkali consumption, etc., and can solve the problem of comprehensive recovery, facilitate production and operation, and simplify the process. The effect of the process

Active Publication Date: 2015-08-19
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: pressurized alkaline leaching, under a certain temperature and pressure, molybdenum enters the solution as soluble molybdate, while copper remains in the mineral because of its insoluble nature. This process is characterized by the separation of copper and molybdenum. Equipment The corrosion is small, the reaction is mild, but the alkali consumption is large, the reaction time is long, a large amount of sodium sulfate is produced, it is difficult to handle, and the production cost is high; pressurized acid leaching, under a certain temperature and pressure, most of the copper is in the form of copper sulfate Into the solution, more than 20% of the molybdenum enters the solution, and the remaining molybdenum exists in the solid phase in the form of molybdenum acid. The total conversion rate of molybdenum reaches 99%, but the copper content in the slag is relatively high, and the molybdenum and copper in the solution are not effective. Separation, resulting in increased smelting costs

Method used

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  • Treating method for complex copper-molybdenum deposit

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] Get 100g of copper-molybdenum mixed ore, the main components are 10.63% copper, 30.16% molybdenum, 11.63% iron, and 35.4% sulfur, 90% of which are finely ground to below 300 mesh, add 500ml of dilute sulfuric acid with a concentration of 100g / L for slurrying, Add 0.2g lignin, carry out pressurized oxidation leaching at 150°C, feed oxygen during the process, control the oxygen partial pressure to 5 atm, and react for 2 hours.

[0032] After the reaction is finished, copper, iron, etc. are leached into the solution, the leaching rate of copper, iron, etc. reaches more than 85%, and the slag contains more than 45% molybdenum. Iron powder is added to the filtrate to replace copper, and the purity of the sponge copper is 89.35%. Copper leaching slag is pressurized to oxidize molybdenum at 150-220°C, and the conversion rate of molybdenum can reach more than 98%.

Embodiment 2

[0034] Add 100g of copper-molybdenum ore to 500ml of dilute sulfuric acid with a concentration of 25g / L, add 5g of coal powder, the copper-molybdenum ore contains 8.35% copper and 35.67% molybdenum, control the reaction temperature at 150°C, oxygen partial pressure at 5atm, and leaching time for 3h.

[0035] After the reaction is completed, the copper leaching rate is above 90%, the iron part is precipitated into the leaching slag, and the molybdenum leaching rate is lower than 2%.

[0036] The above solution is extracted to extract copper, and the extraction rate of copper is over 98%. The molybdenum is leached from the leaching slag through pressure oxidation, and the conversion rate of molybdenum is over 98.5%.

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Abstract

The invention discloses a treating method for a complex copper-molybdenum deposit, which belongs to the technical field of wet metallurgy. The method comprise the following steps: adding a proper amount of sulfuric acid and an additive into the copper-molybdenum deposit and carrying out pressure leaching, wherein copper and the like are leached and enter a solution and molybdenum is left in leaching residue in the form of molybdenum sulfide; and subjecting the leaching residue to roasting or pressure oxidation so as to produce products like molybdenum oxide and subjecting leachate, i.e., a copper sulphate solution, to iron powder replacement so as to produce copper sponge or extract products like copper sulphate and electrolytic copper. The treating method provided by the invention can realize convenient and fast separation of molybdenum and copper, improves the grade of molybdenum concentrate, reduces the content of impurities in products and comprehensively recovers copper.

Description

technical field [0001] The invention relates to a processing method for complex copper-molybdenum ore with high copper content, which converts high-copper and low-grade molybdenum concentrate into high-grade molybdenum concentrate suitable for molybdenum smelting while obtaining copper products. Background technique [0002] Copper and molybdenum are important non-ferrous metal resources. Molybdenum and copper are mostly associated in nature. Copper-molybdenum ore exists widely in my country and has high economic value. Traditional copper-molybdenum mines mostly use the beneficiation process to produce qualified molybdenum concentrates and copper concentrates, and the copper content in molybdenum concentrates is strictly controlled. After molybdenum concentrate is roasted to produce molybdenum oxide, ferromolybdenum is further produced or ammonium molybdate is produced by ammonia leaching. MoS during roasting of molybdenum concentrate 2 is oxidized to MoO 3 , when the cop...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B34/34C22B3/06
CPCY02P10/20
Inventor 蒋开喜王海北王玉芳李相良李贺张邦胜邹小平王仍坚王洪刚
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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