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Zinc smelting process by neutralization and hydrolysis iron removal method

A process and zinc smelting technology, which is applied in the field of zinc smelting process by neutralization hydrolysis iron removal method, can solve the problems of short zinc indium production cost, high zinc indium production cost, long process flow, etc., and achieve good impurity removal effect, The effect of reducing energy consumption and shortening the process flow

Inactive Publication Date: 2010-01-20
杨志杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a neutralization hydrolysis method for iron removal without heating, comprehensive recovery of zinc and indium without coal consumption, short process flow, low production cost of zinc and indium, energy saving and consumption reduction, and little environmental pollution Zinc smelting process to solve the problems of high energy consumption, long process flow and high production cost of zinc and indium existing in the above-mentioned several existing hydrometallurgical zinc smelting processes

Method used

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  • Zinc smelting process by neutralization and hydrolysis iron removal method
  • Zinc smelting process by neutralization and hydrolysis iron removal method
  • Zinc smelting process by neutralization and hydrolysis iron removal method

Examples

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Effect test

Embodiment 1

[0039] A kind of process of zinc smelting by neutralization hydrolysis deironing method (referring to figure 1 ), using the hydrometallurgy process, including the following procedures:

[0040] A, leaching section: the leaching section includes a neutral leaching process, a low-acid leaching process and a high-acid leaching process;

[0041] A1. Neutral leaching process: add the neutralized hydrolysis supernatant and waste electrolyte to the neutral leaching tank to prepare the neutral leaching pre-liquid according to the initial acid requirements of neutral leaching, and add manganese dioxide after heating to 50°C. Add zinc calcine dust for leaching, the natural reaction heat (that is, the heat naturally generated during the reaction) reaches 65-70°C, and the reaction time is 30-60 minutes; the output neutral leaching pulp is sent to the neutral leaching dense tank to settle, The output neutral leaching supernatant is sent to the neutral leaching supernatant storage tank, an...

Embodiment 2

[0054] A kind of process of zinc smelting by neutralization hydrolysis deironing method (referring to figure 1 ), using the hydrometallurgy process, including the following procedures:

[0055] A, leaching workshop section: its specific operation steps and technological conditions are identical with embodiment one;

[0056] B, neutralization and hydrolysis process: its specific operation steps are identical with embodiment one, and difference is:

[0057] The technical conditions of the neutralization and hydrolysis process are as follows: initial reaction acid: 10-20g / L, reaction temperature: 5-40°C, reaction time: 40-65 minutes, final reaction acid: PH=3.6-4.2, solid-liquid ratio 1: Between 6 and 8.

Embodiment 3

[0059] A kind of process of zinc smelting (containing extraction indium) by neutralization hydrolysis deironing method (referring to figure 2 ), using the hydrometallurgy process, including the following procedures:

[0060] A, leaching workshop section: its specific operation steps and technological conditions are identical with embodiment one;

[0061] B. Neutralization and hydrolysis process: its specific operation steps are the same as in Example 1, the difference is that the neutralization and hydrolysis iron slag produced in the dense tank is sent to acid leaching for indium-containing iron slag (i.e. neutralization and hydrolysis bottom flow press filter residue) The process is acid leached;

[0062] The technical conditions of the neutralization hydrolysis process are as follows: initial reaction acid: 15~30g / L, reaction temperature: 10~40°C, reaction time: 45~70 minutes, final reaction acid: PH=3.6~4.3, solid-liquid ratio 1: Between 6 and 8.

[0063] C. Acid leach...

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Abstract

The invention relates to a nonferrous metal smelting technology, in particular to a zinc smelting process by a neutralization and hydrolysis iron removal method for smelting zinc and indium from zinc roasting-sand smoke dust. The zinc smelting process comprises the following working procedures: A. leaching a working section comprising a neutral leaching working procedure, a weak acid leaching working procedure and a strong acid leaching working procedure: delivering the supernatant obtained after neutral leaching to the purifying and the electrodeposit working procedure for extracting zinc; and B. a neutralization and hydrolysis working procedure: delivering the supernatant obtained after weak acid leaching to the neutralization and hydrolysis working procedure, adding in calcium hydroxide or calcium carbonate for neutralizing hydrolysis for iron removal, and returning the supernatant obtained after neutralization and hydrolysis to the neutral leaching working procedure, wherein the iron residues obtained after neutralization and hydrolysis are piled when no indium is included, and when the iron residues obtained after neutralization and hydrolysis are iron residues including indium, the iron residues are delivered to the pickling working procedure, and the supernatant obtained after pickling is delivered to a traditional centrifugal-extraction indium-extracting system for indium extraction. The invention shortens the process flow of the zinc metallurgy (including indium extracting), invents a method for removing iron at normal temperature and comprehensively recycling the zinc and indium without coal consumption at normal temperature, achieves the purposes of saving energy, reducing consumption, reducing the zinc and indium production cost and having good impurity cleaning effect and also provides a process flow simply following the traditional process.

Description

【Technical field】 [0001] The invention relates to the technical field of smelting of nonferrous metals, in particular to a process for smelting zinc and indium from zinc calcine dust by neutralization, hydrolysis, and iron removal. 【Background technique】 [0002] At present, the existing domestic zinc smelting processes mainly include the conventional zinc smelting process, the jarosite zinc smelting process and the comprehensive utilization research process of low-grade high-iron zinc concentrate. It consists of: (1) after the zinc in the zinc calcine dust is leached to the maximum extent in the leaching section, the zinc-containing solution is sent to be purified and the zinc is extracted by electrowinning; The slag is obtained from soot to recover zinc and indium. The difference lies in the different methods of iron removal: for example, the conventional method of zinc smelting process and the research process of comprehensive utilization of low-grade high-iron zinc conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B19/30C22B58/00C22B3/04C22B3/46
CPCY02P10/20
Inventor 杨志杰
Owner 杨志杰
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