Technology for processing lead copper matte by ferric chloride

A technology of ferric trichloride and lead matte, which is applied in the direction of improving process efficiency, etc., can solve the problems of high corrosion resistance requirements for equipment materials, increased production costs, and increased environmental burdens, so as to achieve environmental protection and short process , the effect of short leaching time

Inactive Publication Date: 2013-03-27
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, this technical solution oxidizes and leaches copper in a fully acidic system, which requires high corrosion resistance conditions for equipment materials, and the resulting production costs will also increase; on the other hand, the elemental sulfur generated during the leaching process is mixed into the leaching residue. , when the slag is returned to the fire-method lead smelting system, sulfur dioxide flue gas will be generated. Since the content of sulfur dioxide in the flue gas is not high, it cannot meet the conditions of sulfur dioxide concentration required for acid production. In order to reduce production costs, manufacturers generally choose Direct discharge to the air, which increases the burden on the environment

Method used

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  • Technology for processing lead copper matte by ferric chloride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The chemical composition of lead matte in a factory is as follows:

[0046] Pb: 7.83%, Cu: 29.38%, Fe: 36.22%, S: 20.07%, SiO 2 : 3.81%, CaO: 1.14%, Ag: 0.0993%, Zn: 1.11%, Te: 0.11%, Se: 0.21%. Implementation methods such as figure 1 As shown, after grinding the lead matte through an 80-mesh sieve, add the prepared FeCl 3 The leaching solution is fed into the air, the stirring speed is 300r / min, and the leaching is carried out under normal pressure. The leaching conditions are: using FeCl 3 Solution leaching, FeCl 3 The concentration is 300g / L, the liquid-solid ratio is 5:1, the temperature is 89°C, air is continuously fed in, the stirring speed is 300r / min, and the reaction time is 4 hours. The recovery rate of copper is 84.39%.

Embodiment 2

[0048]The chemical composition of lead matte in a factory is as follows:

[0049] Pb: 7.83%, Cu: 29.38%, Fe: 22.60%, S: 19.85%, SiO 2 : 3.02%, CaO: 1.54%, Ag: 0.1022%, Te: 0.19%, Se: 0.31%. Implementation methods such as figure 1 As shown, after grinding the lead matte block material, add the prepared FeCl 3 Leaching liquid, and feed into air, stirring speed is 500r / min, normal pressure leaching, the operation of leaching copper is exactly the same as embodiment 1, and its leaching condition is: adopt FeCl 3 Solution leaching, FeCl 3 The concentration is 350g / L, the liquid-solid ratio is 5:1, the temperature is 95°C, air is continuously introduced, the stirring speed is 350r / min, and the reaction time is 8 hours. The recovery rate of copper is 88.07%.

Embodiment 3

[0051] The chemical composition of lead matte in a factory is as follows:

[0052] Pb: 7.67%, Cu: 29.72%, Fe: 19.53%, S: 20.08%, SiO 2 : 4.52%, CaO: 0.97%, Ag: 0.0633%, Te: 0.17%, Se: 0.26%. Implementation methods such as figure 1 As shown, after grinding the lead matte block material, add the prepared FeCl 3 Leach solution, and feed into air, stirring speed is 300r / min, normal pressure leaching, the operation of leaching copper is exactly the same as embodiment 1, and its leaching condition is: adopt FeCl 3 Solution leaching, FeCl 3 The concentration is 400g / L, the liquid-solid ratio is 5:1, the temperature is 95°C, air is continuously fed in, the stirring speed is 300r / min, and the reaction time is 7.5 hours. The recovery rate of copper is 92.6%.

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Abstract

The invention relates to a technology for processing lead copper matte by ferric chloride, and belongs to the wet method field of the non-ferrous metal metallurgy. The technology comprises the following steps: crushing and grinding the lead copper matte, and sieving by a mesh 80 mesh sieve to obtain below 80 mesh particles; and carrying out normal pressure leaching of the ground lead copper matte in a leaching tank at 50-100DEG C for 4-8h, wherein the FeCl3 concentration is controlled between 200g / l and 400g / l, and the liquid-solid ratio is 3-10:1. Air is properly blown and a small amount of hydrochloric acid is added to acidify in order to improve the leaching effect and shorten the leaching time. Trivalent iron ions are utilized as an oxidizing agent to leach sulfides under an acidic condition. In the oxidation leaching process, sulfur in the lead copper matte is oxidized into elemental sulfur which is transferred to slag, copper is oxidized and enters a solution in an ion state, and lead is residual in the slag as lead chloride together with gold and silver; after completing the leaching process, liquid-solid separation of an ore pulp is carried out while hot to realize the preliminary separation of copper and lead; and scrap ion is added to the copper-enrich leaching solution to displace copper in the leaching solution in order to obtain a preliminary product copper sponge.

Description

technical field [0001] The invention relates to a process for treating lead matte with ferric chloride, which belongs to the field of nonferrous metal hydrometallurgy. Background technique [0002] In the lead smelting production process, the blast furnace smelting and crude lead fire refining process will produce lead matte, the main components of which are FeS, Cu 2 S, PbS, and lead matte also contain valuable metals such as gold and silver and scattered metals of selenium and tellurium. Lead matte is usually processed by fire method. It is blown in a copper smelting converter to obtain blister copper, and lead is blown into soot. This method has disadvantages such as long blowing time, high operation cost, difficulty in recovering lead metal resulting in low recovery rate, and environmental pollution. [0003] On July 23, 2008, Chinese Invention Patent Publication No. CN 101225476A disclosed a "process for recovering copper from lead matte", which is to grind the lead m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/46C22B15/00
CPCY02P10/20
Inventor 谭霖李震曦杨跃新曹永贵
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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