Technology for recovering metallic copper from high-lead copper matte
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A technology of metal copper and copper matte, applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., to achieve the effect of strong process adaptability, high recovery rate and strong adaptability
Active Publication Date: 2013-03-27
CHENZHOU CITY JINGUI SILVER IND CO LTD
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[0005] Aiming at the current problems and deficiencies in the current treatment of high-lead copper matte, the present inventio
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Embodiment 1
[0033] The chemical composition of high lead copper matte in a factory is as follows, Pb: 15.64%, Cu: 34.38%, Fe: 17.51%, S: 11.54%, SiO 2 : 0.43%, CaO: 0.54%, Ag: 0.0122%, Au: 0.0064%, Se: 0.081%, Te: 0.015%.
[0034] Its specific process steps are as follows:
[0035] ① Crushing and grinding
[0036] The high-lead copper matte recovered from the pyrometallurgical lead smelting system is usually in the form of large blocks with different particle sizes after cooling. In order to ensure a high metal leaching rate, crushing or vibration grinding must be carried out. Usually, the jaw crusher is used for processing and sent to the ball mill to control the particle size of the block material below 100 mesh, and take 200 grams of the underscreen;
[0037] ②Ammonia-ammonium carbonate system pressure oxidation leaching
[0038] The high-lead copper matte is directly fed, and the ammonium carbonate solution is used to complete the pulping operation in the autoclave; a certain amou...
Embodiment 2
[0055] The chemical composition of high lead copper matte in a factory is as follows, Pb: 7.86%, Cu: 29.51%, Fe: 32.55%, S: 20.09%, SiO 2 : 1.57%, CaO: 0.88%, Ag: 0.0092%, Au: 0.0064%, Se: 0.053%, Te: 0.026%. Process this material by vibrating mill, sieve 100 mesh, get 200 grams of sieve. Prepare ammonia water-ammonium carbonate leaching solution 1400mL, NH 3 : NH 4 + =3:1, stirring and pre-leaching for 2 hours at room temperature. After the reaction, the pulp is sent to the autoclave, and 200mL of 30% ammonia water is added, and after the temperature is raised to a certain value, oxygen is introduced to oxidize and leaching copper. Its operating conditions: temperature 210°C, oxygen partial pressure 0.4MPa, total pressure 2.5MPa, liquid-solid ratio 8:1, stirring and leaching reaction for 2.5 hours. The copper leaching rate reached 99.65%, the lead leaching rate was 0.14%, and the iron leaching rate was 4.26%. After the liquid-solid separation, the copper ammonia solutio...
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Abstract
The invention relates to a technology for recovering metallic copper from high-lead copper matte, and belongs to the nonferrous metallurgy and wet metallurgy fields. The technology comprises the following steps: breaking and grinding high-lead copper matte to below 100 meshes, mixing the ground high-lead copper matte with an ammonium carbonate solution to prepare a pulp, adding a proper amount of ammonia water, and pre-leaching under a controlled pH value condition; pumping the ore pulp obtained after the above reaction into an autoclave, and adjusting the liquid-solid ratio to 6-10:1; letting in ammonia and high-pressure oxygen, and controlling the oxygen pressure between 0.1MPa and 1.2MPa and the total pressure between 1.0MPa and 3.7MPa; carrying out high-pressure ammonia system oxidizing leaching at a leaching temperature of 160-240DEG C; carrying out liquid-solid separation, and allowing the obtained solution to undergo ammonia steaming in order to recover ammonia and carbon dioxide; floating the obtained filter residues to recover lead sulfate; and sending the precipitate obtained after the ammonia steaming operation to a solution tank, carrying out dilute acid leaching treatment to recover copper sulfate in the precipitate, purifying to remove impurities, sending to an electro-deposition system, and recovering to obtain a product cathode copper.
Description
technical field [0001] The invention belongs to the field of wet nonferrous metallurgy, in particular to a process for recovering metal copper from high-lead copper matte. Background technique [0002] In the process of lead fire smelting, bottom blowing furnace, blast furnace smelting and crude lead fire refining process will produce a mixture of high-lead copper matte, the main components of which are FeS, Cu 2 S, PbS, after pyro-enrichment and deleading treatment, copper matte with high lead content is obtained, commonly known as lead matte. [0003] High-lead copper matte is usually treated by pyrotechnics, that is, blister copper is obtained by converter blowing, and then further electrolytically refined into cathode copper. The main disadvantage of this method is that the recovery of lead is not considered. In the converter blowing process, the lead in the copper matte is blown into lead vapor and enters the converter flue gas. This not only consumes a lot of manpowe...
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