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Process method for producing copper sulfate by intensified leaching of copper-containing materials

A technology that strengthens leaching and process methods, and is applied in the field of comprehensive recycling of non-ferrous metal smelting slag, which can solve the problems of large environmental pollution, high energy consumption, and short process, and achieve low environmental pollution, increased leaching rate, and short production process. Effect

Inactive Publication Date: 2009-09-23
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to aim at the problems existing in the above-mentioned existing copper slag production technology of copper sulfate, a breakthrough invention and development of a copper sulfate production method with short flow process, low energy consumption, good environment and high metal recovery rate, its main The feature is that the copper slag is directly leached through enhanced leaching, and the oxidation roasting process of copper slag is replaced by enhanced leaching, which solves the problems of high energy consumption, large environmental pollution and long process in the copper slag oxidation roasting process

Method used

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  • Process method for producing copper sulfate by intensified leaching of copper-containing materials
  • Process method for producing copper sulfate by intensified leaching of copper-containing materials

Examples

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Effect test

Embodiment 1

[0028] Example 1: 42.35% copper, 4.98% zinc, 1.1% iron, 130kg dry weight, 42.69% copper slag was added to 1m 3 In the autoclave, feed more than 90% pure oxygen, the initial acid concentration is 160g / L, the liquid-solid ratio is 4:1, the leaching pressure is 1.0Mpa, the leaching temperature is 150°C, the rotation speed is 350r / min, and the leaching time is 3h. Get Cu 2+ 640L of leaching solution of 69g / L, 57.55kg of leaching residue, of which the leaching residue contains 5.34% Cu, 1.93% Zn, 1.74% iron, and the leaching rate of copper reaches 94.42%.

[0029] Add 20g / L polyacrylamide flocculant when the leachate is soaked at 60°C, clarification time is 3h, clarification and centrifugal filtration, concentration to remove calcium and magnesium, concentration time is 5-7h, after concentration, the specific gravity of the liquid is controlled to 1.42 and crystallization begins, the crystallization filtration temperature is 75°C, once Crystalline copper sulfate pentahydrate 110.8...

Embodiment 2

[0031] Example 2: 46.35% copper, 4.68% zinc, 1.23% iron, 120kg dry weight, 41.34% copper slag was added to 1m 3 In the autoclave, feed more than 90% pure oxygen, the initial acid concentration is 200g / L, the liquid-solid ratio is 3:1, the pressure is 1.1Mpa, the leaching temperature is 100°C, the rotating speed is 350r / min, and the leaching time is 3h, the obtained Cu 2+ 540L of leaching solution of 74.36g / L, 45.72kg of leaching residue, of which the leaching residue contains 1.74% Cu, 0.44% Zn, 0.73% iron, and the leaching rate of copper reaches 98.40%.

[0032] Add 5g / L polyacrylamide flocculant when the leachate is soaked at 70°C, clarification time is 1h, clarification and centrifugal filtration, concentration to remove calcium and magnesium, concentration time is 5-7h, after concentration, the specific gravity of the liquid is controlled to 1.45 and crystallization begins, the crystallization filtration temperature is 80°C, once Crystalline copper sulfate pentahydrate 11...

Embodiment 3

[0034] Example 3: 36.85% copper, 5.44% zinc, 1.34% iron, 140kg dry weight, 47.69% copper slag were added to 1m 3 In the autoclave, feed more than 90% pure oxygen, the initial acid concentration is 180g / L, the liquid-solid ratio is 7:1, the pressure is 1.2Mpa, the leaching temperature is 80°C, the rotating speed is 300r / min, and the leaching time is 2.5h. Get Cu 2+ 550L of 75g / L leachate, 55.44kg of leaching residue, of which the leaching residue contains 3.44% Cu, 0.64% Zn, 0.98% iron, and the copper leaching rate reaches 96.30%.

[0035] Add 10g / L3 when the leach solution is soaked at 80°C #Flocculant, clarification time 2h, clarification and centrifugal filtration, concentration and removal of calcium and magnesium, concentration time 5-7h, after concentration, the specific gravity of the liquid is controlled to 1.30 and crystallization begins, the crystallization and filtration temperature is 85°C, the first crystallization of copper sulfate pentahydrate is 111.04kg, coppe...

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Abstract

The invention relates to a process method for producing copper sulfate by intensified leaching of copper-containing materials, which has short production flow, low energy consumption, good environment and high metal recovery rate and belongs to the technical field of integrated recovery and utilization of nonferrous metal smelting slag. The process method is mainly characterized in that the copper slag is directly intensifiedly leached, and the oxidation roasting process of the copper slag is replaced by intensified leaching, thereby solving the problems of high energy consumption, great environmental pollution and long process flow of the copper slag during the oxidation roasting process. As the process method intensifies the leaching conditions, the leaching rate of copper is improved to be more than 94 percent, and the leaching time is reduced to 2 hours from the conventional 24 hours, thereby greatly improving the production efficiency of the copper sulfate, effectively reducing the production cost, reducing the production flow of the copper sulfate by one third, and greatly improving the metal recovery rate.

Description

technical field [0001] The invention relates to a process for producing copper sulfate from copper-containing materials through enhanced leaching, which has short production process, low energy consumption, good environment and high metal recovery rate, and belongs to the technical field of comprehensive recycling of nonferrous metal smelting slag. Background technique [0002] In the smelting of zinc, the cadmium in the zinc sulfide concentrate volatilizes into the smoke during the roasting process of the fluidized bed furnace. After the smoke is leached, the cadmium enters the leaching solution, and the leaching solution is purified by zinc powder to obtain copper cadmium slag, which is then leached and zinc powder Substitution to obtain sponge cadmium and copper slag, the copper slag generally contains 30-50% of copper, 5-7% of zinc, 8-10% of lead and 1-3% of cadmium. [0003] In the existing technology of using copper slag to produce copper sulfate, since the copper in t...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/22C22B15/00
CPCY02P10/20
Inventor 贾著红包崇军杨建斌吴红林浦恩彬刘艳涛李会良王建昆张候文雷建华
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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