Comprehensive zinc hydrometallurgy recovery system technique

A technology of hydrometallurgy and recovery system, which is applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc. It can solve the problems of high production cost, low economic benefit, and poor recycling of waste water, etc., to achieve clean The production environment is friendly and the effect of extending the industrial chain

Inactive Publication Date: 2013-08-14
CHIFENG ZHONGSE ZINC IND CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In the process of hydrometallurgy and recycling of valuable metals, each production process is carried out independently, and the recycling of

Method used

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  • Comprehensive zinc hydrometallurgy recovery system technique
  • Comprehensive zinc hydrometallurgy recovery system technique

Examples

Experimental program
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Example Embodiment

[0021] Example 1: Such as figure 1 with figure 2 As shown, a comprehensive recovery system process of hydro-zinc smelting, which includes hydro-zinc smelting process, flotation recovery process, extraction recovery process and silver concentrate extraction valuable metal process;

[0022] The wet zinc smelting process includes a leaching step and an electrolytic zinc step. The leaching step is to first carry out a neutral leaching of the zinc calcine, and then carry out a high temperature and high acid leaching. The high temperature and high acid leaching produces high leaching slag. Electrolyte the leaching solution to obtain metallic zinc and generate electrolytic waste;

[0023] The flotation recovery process is to perform flotation after slurrying the high leaching residue, and the flotation process produces silver concentrate and ore processing wastewater;

[0024] The extraction and recovery process includes an extraction process and a back-extraction process. The extraction ...

Example Embodiment

[0031] Example 2: Others are the same as Example 1, except that the silver concentrate extraction process for valuable metals is in the roasting step (2): oxidative roasting at 680°C for 3.8 hours; in the sulfuric acid leaching step ( 3) Medium: solid-liquid ratio 1:5, starting acid 120g / L, final acid 60g / L, reaction temperature 60°C, reaction time 4 hours.

Example Embodiment

[0032] Example 3: Others are the same as Example 1, except that the silver concentrate extraction process for valuable metals is in the roasting step (2): oxidizing and roasting at 760°C for 3 hours; in the sulfuric acid leaching step (3) Medium: solid-liquid ratio 1:6, starting acid 150g / L, final acid 70g / L, reaction temperature 70°C, reaction time 3 hours.

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Abstract

The invention discloses a comprehensive zinc hydrometallurgy recovery system technique which comprises a zinc hydrometallurgy technique, a floatation recovery technique and an extraction recovery technique; high leaching residue is obtained by leaching at high temperature and high acid through the zinc hydrometallurgy technique, and electrolysis waste liquor can be generated by electrodepositing zinc; and according to the floatation recovery technique, floatation is carried out after mixing the high leaching residue size, and silver concentrate and beneficiation wastewater are generated in the floatation process; and the extraction recovery technique consists of an extraction process and a reextraction process, the beneficiation wastewater is extracted in an extraction tank in the extraction process through an extractant, extraction raffinate is used for the high leaching residue size mixing in the floatation recovery technique, the organic extraction phase is reextracted in the reextraction process by the electrolysis waste liquor, regenerative organic phase returns back to the extraction process, and zinc-containing liquid flows in the neutral leaching and high-temperature and high-acid leaching steps in the leaching step of the zinc hydrometallurgy technique. According to the comprehensive zinc hydrometallurgy recovery system technique, the recovery rate of valuable metal is high, the economic benefits are obvious, no hidden safety hazard exists, and the environment pollution can be favorably reduced.

Description

Technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting, and specifically relates to a comprehensive recovery system process for hydrometallurgical zinc smelting. Background technique [0002] Hydro-zinc smelting is a process in which zinc calcine undergoes neutral leaching and high-temperature high-acid leaching, and then the leaching solution obtains zinc metal by electrowinning. After high temperature and high acid leaching, a large amount of high acid leaching residue is produced, which is referred to as high leaching residue. The high-leaching slag contains valuable metals such as silver, zinc, lead, and copper. The content of valuable metals is low. The average silver content of the slag is about 200g / T, including 5-6% zinc, 2-3% lead, and 0.3-% copper. 0.4%. At present, the high-leaching slag produced by the domestic high-acid leaching process has reached more than 1.5 million tons per year. Due to the low content of valuable meta...

Claims

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Application Information

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IPC IPC(8): C25C1/16C22B3/08C22B3/46C22B1/10C22B1/02C22B11/00C22B15/00C25C1/20
CPCY02P10/20
Inventor 马永涛王凤朝李龙张春明李连中刘玉芹
Owner CHIFENG ZHONGSE ZINC IND CO LTD
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