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Process method for producing copper sulfate by using copper scale at normal temperature and normal pressure

A process method, copper sulfate technology, applied in the field of comprehensive recycling of non-ferrous metal smelting slag, can solve the problems of large environmental pollution, high production energy consumption, long process, etc., achieve low investment in industrialization, reduce energy consumption in the heating process, and process The effect of low equipment requirements

Active Publication Date: 2011-08-03
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has problems such as long process, high production energy consumption, large environmental pollution, and low metal recovery rate.

Method used

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  • Process method for producing copper sulfate by using copper scale at normal temperature and normal pressure
  • Process method for producing copper sulfate by using copper scale at normal temperature and normal pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Add 25.43% copper, 10.69% zinc, 6.73% Cd, dry weight 3kg, moisture 41.69%, particle size -120 mesh copper slag into a 20L leaching tank with mechanical stirring, and blow into the tank ~0.05m 3 .min -1 .Kg Copper slag -1 Air (0.06MPa), the initial acid concentration is 165g.L -1 , Liquid-solid ratio is 5:1, rotating speed 400r.min -1 , Leaching time 24h, can get Cu41g.L -1 The leaching solution is 17.4L, and the leaching residue is 1.35kg. The leaching residue contains Cu3.05%, Zn 4.53%, and contains high lead and silver. It can be recovered by the lead system. The leaching rate of copper reaches 94.33%. Add 20g.L to the extract at 60℃ -1 Polyacrylamide, clarification time 3h, clarification filtration, concentration removal of calcium and magnesium, concentration time 7-9h, after concentration the liquid control specific gravity 1.42 to start crystallization, crystallization filtration temperature 30℃, one-time crystallization copper sulfate pentahydrate 1.92kg, copper su...

Embodiment 2

[0040] Add 42.73% copper, 4.98% zinc, 3.45% Cd, 2.4kg dry weight, 42.58% moisture, and copper slag with a particle size of -150 mesh into a 20L leaching tank with mechanical stirring, and drum into the tank. Entry ~ 0.2m 3 .min -1 .Kg Copper slag -1 Air (0.07MPa), the initial acid concentration is 155g.L -1 , Liquid-solid ratio is 5.5:1, rotating speed is 380r.min -1 , Leaching time 24h, Cu can be obtained 2+ 58.03g.L -1 The leaching solution is 16.4L, and the leaching residue is 1.1kg. The leaching residue contains 5.12% Cu and 2.67% Zn. The treatment method for this residue is the same as above. The leaching rate of copper is 94.54%. Add 20g.L to the extract at 60℃ -1 Polyacrylamide, clarification time 3h, clarification filtration, concentration removal of calcium and magnesium, concentration time 6-8h, after concentration the liquid control specific gravity 1.45 to start crystallization, crystallization filtration temperature 30℃, one-time crystallization of copper sulfate pe...

Embodiment 3

[0042] Add 58.85% copper, 3.14% zinc, 1.21% Cd, dry weight 2.6kg, moisture 47.69%, particle size -180 mesh copper slag into a 20L leaching tank with mechanical stirring, and drum into the tank Into ~ 0.3m 3 .min -1 .Kg Copper slag -1 Air (0.07MPa), initial acid concentration 175g.L -1 , The liquid-solid ratio is 6:1, the speed is 350r / min, and the leaching time is 24h, and Cu can be obtained 2+ 75.24g.L -1 The leaching solution is 18.6L and the leaching residue is 1.26kg. The leaching residue contains 2.94% Cu and 0.64% Zn, and the copper leaching rate is 97.58%. Add 10g.L to the extract at 60℃ -1 Polyacrylamide, clarification time 2h, clarification filtration, concentration removal of calcium and magnesium, concentration time 5-7h, after concentration the liquid control specific gravity 1.45 starts to crystallize, crystallization filtration temperature 30℃, one-time crystallization copper sulfate pentahydrate 3.77kg, copper sulfate pentahydrate The main content is 97.35%, the w...

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Abstract

The invention discloses a process method for producing copper sulfate by using copper scale at normal temperature and normal pressure, belonging to the technical field of comprehensive recycling of ferrous metal smelting. In the method, under the conditions of normal temperature (to 25DEG C) and normal pressure (to 1.01*10<5>pa, after the ore grinding granularity reaches between -120 and -200 meshes, the copper scale containing 20-60 percent of copper (other components including 1-15 percent of Zn, 5-15 percent of Pb and 1-8 percent of Cd) is mixed with a sulfuric acid solution containing 120-180g.L<-1> of acid and the mixed solution is added in a mechanical stirring groove; and air containing 0.05-0.5m<3>min<-1>.kg<-1> of copper scale is introduced into the groove and sufficient oxidizing atmosphere in the groove is kept. The oxidizing reaction of copper and dilute sulfuric acid is promoted by using the heat released by a neutralization reaction of copper oxide and sulfuric acid and is fully carried out for 18-24h, and then the copper can be better leached to the solution, wherein the leaching rate reaches over 94 percent.

Description

Technical field [0001] The invention is a process method for producing copper sulfate using copper slag under normal temperature and pressure, and belongs to the technical field of comprehensive recovery and utilization of non-ferrous metal smelting slag. technical background [0002] In zinc smelting, the zinc sulfate solution purification process needs to produce copper cadmium slag. The copper cadmium slag is then leached, and zinc powder is replaced to obtain sponge cadmium and copper slag. The copper slag is partially oxidized. The copper slag generally contains 20-60% copper. (The other components are Zn1-15%, Pb5-15%, Cd1-8%). [0003] In the existing technology of using copper slag to produce copper sulfate, it has always been believed that the copper in the copper slag mainly exists in the form of metallic copper and a small amount of copper sulfide. Before leaching, the copper slag must be oxidized and roasted to convert the metallic copper and copper sulfide into Copper...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B3/08C22B15/00C01G3/10
CPCY02P10/20
Inventor 雷德君杨建斌刘艳涛段世卓王建昆钱万德
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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