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Reduction leaching method for cobalt-copper mixed oxidized ores

A technology of oxidized ore and leaching, which is applied in the field of copper-high-cobalt low-like oxide copper-cobalt ore and cobalt-high-copper low-like water-cobalt ore. It can solve the problems of sulfur dioxide gas escape, acid decomposition reaction, and ammonia gas discharge. Achieve low cost, solve the problem of copper-cobalt separation, simple method and process

Active Publication Date: 2016-08-17
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to add sodium sulfite as a leaching aid, acid decomposition reaction is prone to occur during the leaching process, and sulfur dioxide gas escapes, causing environmental pollution
[0008] CN201110113248.5 discloses a method for enriching and recovering copper and cobalt by roasting copper-cobalt oxide ore with ammonium salt at low temperature. This method is a combined process of pyrometallurgy and hydrometallurgy. Due to the introduction of ammonium salt in the process, it is easy to produce Environmental Problems of Ammonia Gas Discharge and Ammonia Nitrogen in Wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Crush the cobalt-copper mixed oxide ore containing 2.1% cobalt and 4.3% copper to 150 mesh, add 3% carbon powder and mix evenly, add it to the electrolytic tank to contact the copper cathode; add it to the electrolytic tank at a liquid-solid ratio of 12:1 2.0N sulfuric acid is used as leaching agent and electrolyte, titanium material is used as anode, constant current reduction leaching is carried out with DC power supply, the electrode distance is kept at 10mm, the temperature of electrolyte is 70°C, and the current density is 200A / m 2 , During the reduction leaching process, gelatin with 1 / 500 of the raw ore mass is added to the electrolyte as an additive, and the reduction leaching time is 420min. After the leaching is completed, the liquid and solid are separated, and the filter residue is stirred and washed three times with hot water at 85°C, and the leaching liquid and the washing liquid are combined. Through analysis and calculation, the leaching rates of cobalt ...

Embodiment 2

[0020] The cobalt-copper mixed oxide ore containing 7% cobalt and 3.5% copper is crushed to 300 mesh, and directly added to the electrolytic tank to contact the stainless steel cathode; according to the liquid-solid ratio of 18:1, 0.5N sulfuric acid is added to the electrolytic tank as a leaching agent and electrolyzed Titanium material is used as the anode, DC power supply is used for constant voltage reduction leaching, the electrode distance is kept at 18mm, the electrolyte temperature is 60°C, and the cell voltage is 2.8V. During the reduction leaching process, 1 / 500 of the original ore quality is added to the electrolyte Gelatin is used as an additive, and the reduction leaching time is 360min. After the leaching is completed, the liquid and solid are separated, and the filter residue is stirred and washed three times with hot water at 90°C, and the leaching liquid and the washing liquid are combined. Through analysis and calculation, the leaching rates of cobalt and copp...

Embodiment 3

[0022] Crush the cobalt-copper mixed oxide ore containing 3.5% cobalt and 1.1% copper to 300 mesh, add 1% copper powder and mix evenly, add it to the electrolytic tank to contact with the titanium cathode; add it to the electrolytic tank at a liquid-solid ratio of 8:1 1.0N hydrochloric acid as leaching agent and electrolyte, carbon material as anode, constant current reduction leaching with DC power supply, keep electrode distance 20mm, electrolyte temperature 50℃, current density 400A / m 2 , during the reduction leaching process, gelatin of 1 / 500 of the mass of raw ore was added to the electrolyte as an additive for 300 minutes. After the reduction leaching is completed, the liquid and solid are separated, and the filter residue is stirred and washed three times with hot water at 85°C, and the leachate and washing liquid are combined. Through analysis and calculation, the leaching rates of cobalt and copper in this example are 99.9% and 99.1% respectively, and the cobalt conte...

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Abstract

Disclosed is a reduction leaching method for cobalt-copper mixed oxidized ores. The method is characterized by including the following steps that the cobalt-copper mixed oxidized ores are crushed, a conductive fortifier is uniformly mixed with the crushed ores to obtain a mixture, and the mixture is added into an electrolytic cell to make contact with a cathode; sulfuric acid or hydrochloric acid is added into the electrolytic cell and serve as a leaching agent and an electrolyte, and reduction leaching is performed while electrochemical parameters are controlled; and in the reduction leaching process, gelatin is added into the electrolyte to serve as an additive, liquid-solid separation is performed after reduction leaching is finished, filter residues are washed with hot water, and leachate containing copper, cobalt and other valuable metals and washing liquid are obtained. By means of the reduction leaching method for the cobalt-copper mixed oxidized ores, addition of a reducing agent is not needed, the leachate containing the cobalt, the copper, nickel and other valuable metals can be obtained, and preferential separation of the copper and the cobalt can be achieved; and the problems of bringing in impurities and polluting environment due to addition of the reducing agent can be avoided. The reduction leaching method for the cobalt-copper mixed oxidized ores is simple in process and low in cost, and automatic control and large scale production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and metallurgy, and relates to a method for reducing and leaching cobalt-copper mixed oxide ores, especially copper-high-cobalt-low-type oxide copper-cobalt ores with significant economic value, and high metal content such as cobalt, copper, nickel, and iron. Cobalt high copper low water-like cobalt ore with low content of impurity metals such as , magnesium and aluminum. Background technique [0002] Cobalt is an important military-civilian dual-use strategic metal and an indispensable metal in the development of national defense industry and aerospace industry. At the same time, cobalt, as a key functional element of lithium batteries, is an important material basis for the development of new energy industries. Copper is a non-ferrous metal closely related to human beings. It has many valuable physical and chemical properties. It has high thermal conductivity and electrical conductivi...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/04
CPCC22B3/045C22B3/08Y02P10/20
Inventor 郭秋松刘志强朱薇曹洪杨
Owner GUANGDONG INST OF RARE METALS
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