Process for selectively extracting copper and cobalt from heterogenite

A selective, water-cobalt ore technology, applied in the direction of improving process efficiency, can solve problems such as long processing process flow, and achieve the effects of environmental friendliness, strong selectivity, and fast leaching speed

Inactive Publication Date: 2011-03-30
CENT SOUTH UNIV
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  • Process for selectively extracting copper and cobalt from heterogenite

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Embodiment 1

[0014] Example 1: In this example, the metal composition of the cobalt ore used in the water is shown in Table 1.

[0015]

[0016] (1) Acid leaching: Weigh 3000g of water cobalt ore powder with a particle size of less than 60 mesh, add 180g of sodium sulfite and mix well; put it into a self-made leaching tank, add 12000mL of 0.75mol / L sulfuric acid, leaching temperature 90℃, start stirring reaction 1.5 Hours; the concentration of copper, cobalt, and iron in the leaching solution were 16.74 g / L, 14.13 g / L, and 0.08 g / L, respectively, and the leaching rates of copper, cobalt, and iron were 98.76%, 96.95%, and 0.47%, respectively. The iron content in the leaching solution is less than 0.1g / L, which meets the conditions of swirling electrowinning of copper and cobalt;

[0017] (2) The leaching liquid is separated by filtration, the leaching residue is washed with water, and the washing liquid is returned to the acid leaching; the washed leaching residue is stored in a centralized ma...

Embodiment 2

[0021] Embodiment 2: In this embodiment, the metal composition of cobalt ore used in the water is the same as in Table 1.

[0022] (1) Acid leaching: Weigh 3000g of water cobalt ore powder with a particle size of less than 60 mesh, add 240g of sodium sulfite and mix well, put it into a self-made leaching tank, add 12000mL of 1.25mol / L sulfuric acid, and start the stirring reaction at the leaching temperature of 60℃ 2.5 hours. The concentrations of copper, cobalt, and iron in the leaching solution were 16.58g / L, 14.29g / L, and 0.09g / L, respectively. The leaching rates of copper, cobalt, and iron were 98.04%, 97.82%, and 0.53%, respectively. The iron content in the leaching solution is less than 0.1g / L, which meets the conditions of swirling electrowinning of copper and cobalt;

[0023] (2) The leaching liquid is separated by filtration, the leaching residue is washed with water, and the washing liquid is returned to the acid leaching; the washed leaching residue is stored in a cent...

Embodiment 3

[0027] Embodiment 3: In this embodiment, the metal composition of the cobalt ore used in the water is the same as in Table 1.

[0028] (1) Acid leaching: Weigh 3000g of water cobalt ore powder with a particle size of less than 60 mesh, add 300g of sodium sulfite and mix well, put it into a self-made leaching tank, add 18000mL of 1.75mol / L sulfuric acid, and start the stirring reaction at the leaching temperature of 90℃ 1.5 hours. The concentrations of copper, cobalt, and iron in the leaching solution were 11.07g / L, 9.55g / L, and 0.07g / L, respectively. The leaching rates of cobalt, copper, and iron were 98.19%, 98.05%, and 0.62%, respectively. The iron content in the leaching solution is less than 0.1g / L, which meets the conditions of swirling electrowinning of copper and cobalt;

[0029] (2) The leaching liquid is separated by filtration, the leaching residue is washed with water, and the washing liquid is returned to the acid leaching; the washed leaching residue is stored in a ce...

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Abstract

The invention provides a process for selectively extracting copper and cobalt from heterogenite, which comprises the following steps of: performing selective reduction and acid leaching on the copper and the cobalt by using sulfuric acid and a reducing agent, namely sodium sulfite; filtering to separate leachate, and performing rotational flow electrodeposition on the leachate to extract the copper; performing rotational flow electrodeposition on liquid from which the copper is extracted to extract the cobalt; and returning liquid from which the cobalt is extracted for acid leaching. Valuable metals such as the copper, the cobalt and the like are selectively leached and immersed into solution, the leaching rates of the copper and the cobalt are over 95 percent, and 99.5 percent of iron is left in leaching residues, so that the copper and the cobalt are separated from the iron in the leaching process; the rotational flow electrodeposition method is adopted, and other impurity removal processes are not needed, so that the process is short, and equipment is simple; and wastewater is not generated and discharged, so that the closed cycle of the solution is realized, and the process is environmental-friendly and suitable for mass production.

Description

Technical field [0001] The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a new process for selectively extracting copper and cobalt from hydrocobaltite. Background technique [0002] The primary cobalt resources currently developed and utilized are mainly hydrocobalt ore. There are flotation methods, high-temperature reduction smelting methods, chemical leaching methods, etc. to treat hydrocobalt ore. When the flotation method is used to treat hydrocobalt ore, the adsorption of collectors is difficult and the flotation rate is low; when high temperature smelting is used for reduction, the smelting temperature is too high, the operating environment is poor, and the discharging operation is difficult. Therefore, most of the current treatment of hydrocobalt ore is chemical leaching, and the main process is sulfuric acid leaching-purification and iron removal-extraction separation-ammonium oxalate precipitation. Sulfuric acid leachi...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/44C22B15/00C22B23/00
CPCY02P10/20
Inventor 田庆华姚标石文堂郭学益李晓静
Owner CENT SOUTH UNIV
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