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Method for haydrometallurgy of zinc

A technology for hydrometallurgical smelting of zinc and zinc oxide, applied in the field of smelting, can solve the problems of low utilization rate of manganese ore pulp, affecting the purity of zinc, etc., and achieve the effect of reducing smelting cost and high oxidation efficiency

Inactive Publication Date: 2011-10-05
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the low utilization rate of manganese ore pulp, the excess manganese ore pulp enters the oxygen-enriched leaching system, so the leaching rate of manganese increases, which breaks the original balance of manganese ions in the system, and the manganese ions in the system are getting higher and higher. accumulate, thereby affecting the purity of the zinc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dry the zinc concentrate and mix it with 25g / L H 2 SO 4 The solutions are mixed, and the liquid-solid ratio is 16:1 to obtain a mixed pulp; 3 The flow rate per hour is fed into a volume of 15m through a high-position feed funnel 3The boiling leaching tank, obtain leachate, and measure composition and content in the leachate, the results are shown in Table 2.

[0040] Components and content of leachate in Table 2 Example 1

[0041] Element

h 2 SO 4

Zn 2+

Cu 2+

Fe 2+

mn 2+

Content (g / l)

5

143

1.6

0.53

12

[0042] Take the prepared leaching solution, feed oxygen gas with a volume concentration of 70% into the leaching solution, react, the pH value of the leaching solution is 4.6, the oxidation temperature is 75°C, the oxidation acidity is 30g / l, and the reaction time is 2 hours , the chemical composition of the leachate after oxidation is shown in Table 3.

[0043] Chemical composition of ...

Embodiment 2

[0046] Using the preparation method as in Example 1, the leachate was obtained, and the ingredients and contents in the leachate were shown in Table 4 for the results.

[0047] Components and content of leachate in Table 4 Example 2

[0048] Element

h 2 SO 4

Zn 2+

Cu 2+

Fe 2+

mn 2+

Content (g / l)

3

155

0.6

0.35

12

[0049] Take the prepared leaching solution, feed oxygen gas with a volume concentration of 60% into the leaching solution, react, the pH value of the leaching solution is 3.5, the oxidation temperature is 72°C, the oxidation acidity is 3g / l, and the reaction time is 1.5 hours , the chemical composition of the leachate after oxidation is shown in Table 5.

[0050] Chemical composition of leachate after table 5 oxidation:

[0051] Element

Embodiment 3

[0053] Using the preparation method as in Example 1, the leachate was obtained, and the ingredients and contents in the leachate were shown in Table 6 for the results.

[0054] Components and content of the leachate in Table 6 Example 3

[0055] Element

h 2 SO 4

Zn 2+

Cu 2+

Fe 2+

mn 2+

Content (g / l)

4

151

0.9

0.23

12

[0056] Take the prepared leaching solution, feed oxygen gas with a volume concentration of 85% into the leaching solution, react, the pH value of the leaching solution is 4.0, the oxidation temperature is 70°C, the oxidation acidity is 3g / l, and the reaction time is 1.5 hours , the chemical composition of the leachate after oxidation is shown in Table 7.

[0057] Chemical composition of leachate after table 7 oxidation:

[0058] Element

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PUM

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Abstract

An embodiment of the invention discloses a method for haydrometallurgy of zinc. According to the invention, during an oxidation process of a leaching solution, a pyrolusite slurry oxidation of prior art is substituted by an oxygen oxidation; oxygen is dissolved in the leaching solution by controlling a pH of the leaching solution; oxygen molecules are decomposed into oxygen atoms and contact with Fe<2+> in the leaching solution, so as to enable Fe<2+> in the leaching solution to converse to Fe<3+> by the oxidation of the oxygen. Therefore, the method for haydrometallurgy of zinc provided by the invention requires no pyrolusite slurry in a zinc smelting process, so as to alleviate problem of manganese ion accumulation in the leaching solution, which occurs in pyrolusite slurry oxidation of prior art, and to facilitate balance of manganese ions. In addition, the oxygen oxidation employed in the invention has a high efficiency, low production costs; thereby zinc smelting costs are reduced.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a method for hydrometallurgy of zinc. Background technique [0002] With the continuous expansion of the use of zinc, the consumption of zinc products in various countries in the world is increasing year by year, and the smelting methods of zinc are also being continuously improved. At present, zinc smelting methods are mainly divided into two categories: pyrometallurgy and hydrometallurgy. Pyro-method zinc smelting includes three main processes: roasting, reduction distillation and refining. The sulfur dioxide produced during the roasting process of zinc concentrate causes flue gas pollution. Therefore, pyro-method zinc smelting is gradually being replaced by hydro-method zinc smelting. [0003] Atmospheric oxygen-enriched direct zinc smelting technology is a full-wet zinc smelting technology. Its main feature is that it eliminates the roasting process of pyrometallurgy, avoid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/20C22B3/44
Inventor 刘朗明陈爱国刘卫平陈敬阳袁建明张万生
Owner ZHUZHOU SMELTER GRP
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