Method for producing high-purity zinc from zinc oxide ore

A technology of zinc oxide ore and metal zinc, which is applied in the field of smelting and can solve problems such as complex processes, industrial waste pollution, and high production costs

Inactive Publication Date: 2004-03-17
YUXI YOUTH INDGROUP YUNNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used method is high-temperature evaporation-adding acid solution-electrolysis. Th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] 1. Leach smithsonite with caustic soda

[0009] NaOH solution concentration (M)

3

4

5

6

Zinc leaching rate (%)

85

95

98

99

Lead leaching rate (%)

80

84

93

97

[0010] It can be seen that the zinc and lead in the ore samples can be leached almost quantitatively.

[0011] 2. Separation of zinc and lead in alkaline solution

[0012] No.

1

2

3

4

5

6

The weight ratio of sulfide to lead

0.75

1.00

1.55

1.85

2.11

2.33

Pb removal rate (%)

47.68

68.34

95.12

99.91

100.00

100.00

Zn removal rate (%)

0.0

0.0

0.0

0.0

2.0

4.0

[0013] 3. Electrolysis of zinc-containing alkaline solution

[0014]

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PUM

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Abstract

The present invention relates to smelting technology and is wet smelting process of producing high purity zinc metal from zinc oxide ore. The technological process includes the steps of: leaching zinc oxide ore with alkali solution; adding sulfide separating agent into filtrate after leaching; filtering to separate lead-containing filtered residue and electrolyzing the filtrate to produce zinc.The present invention has simple technological process, low production cost, high in zinc leaching out rate, reuse of waste liquid and low alkali loss.

Description

technical field [0001] The invention belongs to a smelting method, in particular to a hydrometallurgy technology of zinc oxide ore. technical background [0002] The traditional smelting of zinc ore at home and abroad basically uses sphalerite. With years of mining, the source of this ore has become less and less, and the grade has gradually decreased. People have begun to pay attention to zinc oxide ore, but it is not feasible to extract zinc from zinc oxide ore by smelting sphalerite, so it is very important to develop new technologies. At present, the commonly used method is high-temperature evaporation-adding acid solution-electrolysis. This method has complicated process, high production cost, and sometimes produces industrial waste pollution. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for producing high-purity metal zinc from zinc oxide ore. The process is simple, the production cost is low, ...

Claims

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Application Information

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IPC IPC(8): C22B3/12
CPCY02P10/20
Inventor 赵由才周家荣张荣武易天晟
Owner YUXI YOUTH INDGROUP YUNNAN
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