Method for recovering zinc, indium, iron, and lead from high-iron zinc oxide mixture smelted with zinc

A high-iron zinc oxide and mixture technology is applied in the fields of indium, zinc, lead, and iron recovery, and can solve the problems of large environmental impact of ammonia gas, indium can not be recovered well, waste of resources, etc., and achieves reasonable process, good economic benefits and high efficiency. Social benefits and environmental protection effects

Active Publication Date: 2014-03-26
HENAN YUGUANG ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, zinc smelting enterprises carry out two or three-stage leaching of this high-iron zinc oxide mixture, and then use the leaching solution. However, because the leaching slag is not subjected to enhanced leaching, a large amount of iron remains in the leaching slag, because it contains more zinc ferrite, sulfide Metals such as zinc and indium sulfide are lost with the leaching residue, resulting in waste of resources
In the prio

Method used

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  • Method for recovering zinc, indium, iron, and lead from high-iron zinc oxide mixture smelted with zinc
  • Method for recovering zinc, indium, iron, and lead from high-iron zinc oxide mixture smelted with zinc

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Effect test

Embodiment 1

[0035] (1) Neutral leaching of high-iron zinc oxide mixture

[0036] 1. Raw material: high iron zinc oxide mixture, waste electrolyte.

[0037] 2. Process purpose: add the waste electrolyte containing sulfuric acid and high-iron zinc oxide mixture raw materials into the immersion reaction tank, and react after the temperature rises to a certain condition, dissolve the zinc in the high-iron zinc oxide mixture raw materials, and ensure that the zinc oxide and other Impurities are well separated and a high concentration zinc sulfate solution is obtained.

[0038] 3. Process conditions: (1) The initial HSO concentration of the leaching solution is 160g / l (2) The temperature is 65°C (3) The reaction time is 2h (4) The final acidity PH=4.5.

[0039] 4. Operation method: first use the delivery pump to pump the waste electrolyte containing sulfuric acid into the reaction tank, then turn on the agitator until the volume of the solution reaches 70m 3 Stop feeding the liquid, start to ...

Embodiment 2

[0075] (1) Neutral leaching of high-iron zinc oxide mixture

[0076] 1. Raw material: high iron zinc oxide mixture, waste electrolyte.

[0077] 2. Process purpose: add the waste electrolyte containing sulfuric acid and high-iron zinc oxide mixture raw materials into the immersion reaction tank, and react after the temperature rises to a certain condition, dissolve the zinc in the high-iron zinc oxide mixture raw materials, and ensure that the zinc oxide and other Impurities are well separated and a high concentration zinc sulfate solution is obtained.

[0078] 3. Process conditions: (1) The initial H2SO4 concentration of the leaching solution is 175g / l (2) The temperature is 70-75°C (3) The reaction time is 2-3h (4) The final acidity is PH5.0.

[0079] 4. Operation method: first use the delivery pump to pump the waste electrolyte into the reaction tank, then turn on the agitator until the volume of the solution reaches 70m 3 Stop feeding the liquid, start to heat up the solu...

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Abstract

The invention relates to the field of metal smelting, particularly to a method for recovering zinc, indium, iron, and lead from a high-iron zinc oxide mixture smelted with zinc. The method comprises the following processes: a high-iron zinc oxide mixture neutral leaching process, a neutral leaching residue low acid leaching process, a low acid pressure filter residue peracid leaching process, a low acid leaching liquid prereduction process, and a indium enrichment recycling process; valuable metals are comprehensively recovered from the high-iron zinc oxide mixture; a generated neutral leaching liquid is adopted by a main zinc smelting system to generate electrolytic zinc; a hydrolyzing filter liquor generated from the indium enrichment recycling process contains relatively rich ferrous ions; the hydrolyzing filter liquor is adopted by the main system for removing impurities and generating high-grade indium enrichment residues; therefore, the high-iron zinc oxide mixture is effectively recycled, the problem of high-iron zinc oxide mixture treatment is solved, capability of comprehensive utilization of metal resources is increased, so that resources are comprehensively recycled, and environment protection is facilitated; the method has relatively good economic benefits and social benefits.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for recovering zinc, indium, iron and lead from a zinc smelting high-iron zinc oxide mixture. Background technique [0002] In the conventional wet zinc smelting method, the zinc concentrate is first roasted, and then the roasted ore is leached in two stages, and the new solution produced is electrolytic zinc, and the leaching slag of the two stages has a high zinc content, and then enters the rotary kiln to add pulverized coal coke Fuel such as pellets is reduced and roasted to reduce and volatilize valuable metals such as zinc in the two-stage leaching slag, and produce a high-iron zinc oxide. [0003] At present, zinc smelting enterprises carry out two or three-stage leaching of this high-iron zinc oxide mixture, and then use the leaching solution. However, because the leaching slag is not subjected to enhanced leaching, a large amount of iron remains in the leaching sla...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B19/30C22B58/00C22B13/00
CPCY02P10/20
Inventor 张利涛倪恒发张新庄邓攀张向阳王向阳张文科
Owner HENAN YUGUANG ZINC IND
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