Method for separating copper from lead copper matte

A lead matte, 2SO4 technology, applied in the field of copper separation, can solve the problems of improper roasting temperature control, high maintenance cost, large oxygen consumption, etc., and achieve the effect of improving metal leaching rate, low equipment material requirements, and safe and reliable operation.

A lead matte, 2SO4 technology, applied in the field of copper separation, can solve the problems of improper roasting temperature control, high maintenance cost, large oxygen consumption, etc., and achieve the effect of improving metal leaching rate, low equipment material requirements, and safe and reliable operation.

CN102230083BActive Publication Date: 2012-11-07CHENZHOU YUTENG CHEM IND
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  • Method for separating copper from lead copper matte

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Embodiment 1

[0024] A method for separating copper from lead matte can be specifically realized through the following method steps:

[0025] ①The chemical composition of lead matte is (%): Cu 44.13, Pb 18.21, Fe 4.68, S 15.80, As 0.94, Zn 0.16, Si 0.16, Ag 0.166, crush the lead matte block, and use a ball mill to grind it to the particle size Below 140 mesh;

[0026] ②After ball milling, use NH 3 -(NH 4 ) 2 SO 4 Leaching, continuously feed oxygen during the leaching process; the process conditions of this step are: liquid-solid ratio 10:1; NH 3 with (NH 4 ) 2 SO 4 molar ratio n [NH3] :n [(NH4)2SO4] = 5:1; total ammonia to copper molar ratio n [(NH3)T] :n [CuT] = 8:1; oxygen partial pressure 1.5Mpa; leaching temperature 120°C; leaching time 7h;

[0027] ③ After the leaching process is completed, liquid-solid separation is carried out; the leaching residue and Cu(NH 3 ) i 2+ The leaching solution and the leaching slag are returned to the pyro-method lead smelting system to rec...

Embodiment 2

[0031] A method for separating copper from lead matte can be specifically realized through the following method steps:

[0032] ①The chemical composition of lead matte is (%): Cu 30.65, Pb 5.89, Fe 28.12, S 21.72, As 0.85, Zn 0.36, Si 3.25, Ag 0.085, Au 36g / t, the lead matte block is broken, Use a ball mill to grind to a particle size below 100 mesh;

[0033] ②After ball milling, use NH 3 -(NH 4 ) 2 SO 4 Leaching, oxygen is continuously introduced during the leaching process; the process conditions of this step are: liquid-solid ratio 3:1; NH 3 with (NH 4 ) 2 SO 4 molar ratio n [NH3] :n [(NH4)2SO4] = 6:1; total ammonia to copper molar ratio n [(NH3)T] :n [CuT] = 7:1; oxygen partial pressure 1.0Mpa; leaching temperature 200°C; leaching time 2h;

[0034] ③ After the leaching process is completed, liquid-solid separation is carried out; the leaching residue and Cu(NH 3 ) i 2+ The leaching solution and the leaching slag are returned to the pyro-method lead smelting ...

Embodiment 3

[0038] A method for separating copper from lead matte can be specifically realized through the following method steps:

[0039] ① The chemical composition of lead matte is (%): Cu 26.21, Pb 8.04, Fe 15.70, S 9.02, As 2.72, Zn 0.65, Si 5.34, Ag 0.118, Au 18g / t, which will break the lead matte block , use a ball mill to grind to a particle size below 120 mesh;

[0040] ②After ball milling, use NH 3 -(NH 4 ) 2 SO 4 Leaching, continuously feed oxygen during the leaching process; the process conditions of this step are: liquid-solid ratio 5:1; NH 3 with (NH 4 ) 2 SO 4 molar ratio n [NH3] :n [(NH4)2SO4] = 4:1; total ammonia to copper molar ratio n [(NH3)T] :n [CuT] = 10:1; oxygen partial pressure 0.3Mpa; leaching temperature 150°C; leaching time 5h;

[0041] ③ After the leaching process is completed, liquid-solid separation is carried out; the leaching residue and Cu(NH 3 ) i 2+ The leaching solution and the leaching slag are returned to the pyro-method lead smelting ...

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Abstract

The invention relates to a method for separating copper from lead copper matte, and belongs to the field of the wet-process metallurgy of non-ferrous metal. In the method, the lead copper matte is subjected to oxygen pressure leaching by adopting an NH3-(NH4)2SO4 alkalescent composite system at the temperature of between 110 and 200 DEG C; copper and NH3 undergo a coordination chemical reaction to enter solution, and other metal sulfides are converted into oxides / hydroxides and a sulfur element, the oxides / hydroxides and the sulfur element; and the copper and gold and silver are reserved in leaching residues, and the leaching residues return to a pyrometallurgical lead refining system and are subjected to batching to recover valuable elements such as lead, noble metal, simple substance sulfur. In copper-ammonia coordination solution, copper sulfate enrichment solution is obtained by the selective extraction of LiX84I and reextraction, and qualified cathode electrolytic copper is obtained by the conventional electrodeposition process of copper sulfate. By the method, the copper can be separated from the lead copper matte in one step, and the method is simple in a process, high in recovery rate of valuable metal, less in discharge of waste gas, waste water and waste residues, environment-friendly, low in requirement on equipment materials and safe and reliable in actual operation.

Description

technical field [0001] The invention relates to a method for separating copper from lead matte and belongs to the field of nonferrous metal hydrometallurgy. Background technique [0002] Copper is one of the most common associated elements in lead sulfide concentrates. During the oxygen-enriched smelting process in the bottom-blown furnace of lead sulfide concentrate, copper will form a separate matte phase through oxidation to matte reaction, commonly known as lead matte. Lead matte is a eutectic of metal sulfides such as Cu, Pb, Fe, As, Sb, and also dissolves Cu, Pb, Fe, Au, Ag, Se, Te and Fe in metallic state 3 o 4 . For leaded matte with high copper content (copper weight ratio Cu ≥ 30%), it is generally used as a copper smelting raw material for converter blowing to produce blister copper, and the lead volatilizes into the gas phase to obtain oxide dust. The common process flow Long, low metal recovery rate, large environmental pollution, high production costs and m...

Claims

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Application Information

Patent Timeline
07 Nov 2012
Publication
CN102230083B
IPC
C22B3/14; C22B15/00; C25C1/12
CPC
Y02P10/20
Inventors
谢志刚; 蔡练兵