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Method for recovering copper from copper smelting anode furnace refining slag

A refining slag and anode furnace technology, which is applied in the field of copper recovery from the copper smelting anode furnace refining slag, can solve the problems of reducing the economic benefits of enterprises, and achieve the effects of wide application range, less pollution, and low energy consumption

Pending Publication Date: 2022-02-08
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the refining slag is sold at a low price, it will inevitably reduce the economic benefits of the enterprise

Method used

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  • Method for recovering copper from copper smelting anode furnace refining slag

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Experimental program
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Effect test

Embodiment 1

[0028] A method for recovering copper from the anode furnace copper smelting slag refining, the specific steps are:

[0029] Containing Cu, Fe, Si, O, As, Zn, P, Pb, Ca, Co, Mn, respectively, 40.00%, 15%, 15%, 15%, 3.50%, 3.00%, 3.00%, 2%, 2 %, 0.50%, 1% of the refining slag pulverized, ground to a particle size less than 200 mesh, added containing As, Cu, Zn, H 2 SO 4 Respectively 4.56g / L, 0.56g / L, 0.95g / L and leaching is oxidized 1.52mol / L of spent acid. In the leaching conditions of temperature 80 ℃, liquid-solid ratio (ml / g) 6: 1, time 3h, the air rate of 100ml / min, the leaching rate of 75.02% Cu. Leaching residue was washed, dried 105 deg.] C, according to leach residue and the mass ratio of CaO 5.52: 1 mixture, at a temperature of 700 deg.] C, 4h calcination conditions at the time. After firing the resultant calcine leaching conditions of temperature 70 ℃, liquid to solid ratio of 4: 1, time 4h, under / min air rate 150ml oxidative leaching conditions again, leac...

Embodiment 2

[0031] A method for recovering copper from the anode furnace copper smelting slag refining, the specific steps are:

[0032] Containing Cu, Fe, Si, O, As, Zn, P, Pb, Ca, Co, Mn, respectively 20.03%, 24.97%, 25.00%, 19.94%, 2.26%, 0.98%, 2.01%, 1.25%, 1.98 %, 1.02%, 0.56% of the refining slag pulverized, ground to a particle size less than 200 mesh, added containing As, Cu, Zn, H 2 SO 4 7.79g / L, 1.98g / L, 0.5g / L for oxidative leaching and 0.56mol / L of spent acid, respectively. In the leaching conditions of a temperature of 40 ℃, liquid-solid ratio (ml / g) 8: 1, the time 1h, the air rate of 400ml / min, to give Cu leaching rate of 65.32%. Leaching residue was washed, dried 105 deg.] C, according to leach residue and the mass ratio of CaO 4: mixed with CaO. 1, at a temperature of 900 ℃, the firing conditions for 2h. After firing the resultant calcine leaching conditions of temperature 90 ℃, liquid to solid ratio of 6: 1, time 2h, under / min air rate 300ml oxidative leaching ...

Embodiment 3

[0034] A method for recovering copper from the anode furnace copper smelting slag refining, the specific steps are:

[0035] Containing Cu, Fe, Si, O, As, Zn, P, Pb, Ca, Co, Mn, respectively 29.95%, 19.96%, 19.91%, 25.01%, 1.01%, 1.98%, 0.98%, 0.51%, 0.49 %, 0.1%, 0.1% refining slags crushed, ground to a particle size less than 200 mesh, added containing As, Cu, Zn, H 2 SO 4 1.24g / L, 0.58g / L, 0.24g / L and leaching is oxidized 2.45mol / L of spent acid, respectively. In the leaching conditions of a temperature of 60 ℃, liquid-solid ratio (ml / g) 4: 1, time 5h, the air rate of 250min / ml, obtained leaching rate of 72.06% Cu. Leaching residue was washed, dried 105 deg.] C, more than 4.67 mass according to leach residue and CaO: CaO mixed and after 1, at a temperature of 500 ℃, 6h under calcination time. After firing the resultant calcine leaching conditions of temperature 50 ℃, liquid to solid ratio of 8: 1, Time 6h, an air rate of 400min / ml oxidative leaching conditions aga...

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Abstract

The invention discloses a method for recovering copper from copper smelting anode furnace refining slag. The copper in the refining slag is recovered by adopting a pyrogenic process-wet process combined process of refining slag waste acid leaching, CaO roasting leaching slag and calcine waste acid leaching. The method comprises the following specific steps of crushing and grinding the refining slag until the particle size is less than 200 meshes, and adding waste acid for leaching, washing leaching residues, drying at 105 DEG C, mixing with CaO, and roasting, and adding the roasted product into waste acid for leaching again, mixing the leaching solutions obtained by two times of leaching according to the volume ratio of 1: 1, and then extracting copper. Through the pyrogenic process-wet process combined technology, the total recovery rate of copper in the refining slag is larger than 95%, and the purposes of comprehensive recycling and treatment of waste with waste are achieved. The process is wide in application range, main raw materials are by-products produced by factories, other raw materials are simple in source and easy to purchase, production pollution is little, energy consumption is low, and the method is an environment-friendly and efficient copper recovery method.

Description

Technical field [0001] The present invention belongs to the technical field of metal recycling of resources, particularly to a method of recovering copper refining slag from the anode furnace copper smelting. Background technique [0002] Our dominant position in the world copper consumption. At present, my country's refined copper consumption in more than 50% of global external dependence has more than 70%, in 2020 the amount of imports of copper and copper concentrate reached 23.7 billion yuan, it is one of my country's three major resources imported products. [0003] Deposits of copper has more than small and medium, large, very large deposits less; lean ore, less high-grade ore; a total of associated minerals, less the characteristics of a single mine, copper reserves of about 30 million, accounting for only 4.35% of global copper reserves, the world's first and the world's second-economic situation of the population very asymmetric. [0004] In the red copper scrap as a raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B1/02C22B7/00C22B7/04
CPCC22B15/0067C22B15/0013C22B7/04C22B7/007C22B1/02Y02P10/20
Inventor 张荣良唐超凡李聪曾加张威杨瑞祥
Owner JIANGSU UNIV OF SCI & TECH