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Treatment method of copper secondary source smelting soot

A technology for secondary resources and treatment methods, which is applied in the field of effective treatment of copper secondary resource smelting soot, which can solve problems such as high reactor pressure, polluted operating environment, and easy volatilization of ammonia water, and achieves inhibition of dissolution, low corrosion, and environmental friendliness Effect

Active Publication Date: 2015-12-23
CENT SOUTH UNIV
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Problems solved by technology

Although this method has the characteristics of high debromination efficiency, the debromination temperature is 300°C and above, and the pressure of the reactor is relatively high, so there are certain safety hazards. At the same time, because ammonia water is volatile, it often pollutes the operating environment during the debromination process.

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  • Treatment method of copper secondary source smelting soot

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Embodiment 1

[0020] Copper secondary resource smelting soot finely ground to a particle size of less than 0.149mm, its main components are (%): Cu4.09, Zn33.98, Br1.48, Sn6.06 and Pb22.68; industrial grade sodium hydroxide, of which Sodium hydroxide content ≥ 96%; industrial grade sulfuric acid, of which H 2 SO 4 Content ≥ 98%; industrial grade oxygen, of which O 2 Content ≥ 99%; industrial grade oxalic acid, of which H 2 C 2 o 4 Content ≥ 99.5%; industrial grade lead acetate, of which C 4 h 6 o 4 Pb·3H 2 O content ≥ 98%.

[0021] Weigh 8g of industrial-grade sodium hydroxide and make a solution with 1000ml of water, then add 200g of copper secondary resource smelting soot of the above components to make slurry, put the slurry solution into the high-pressure reactor, seal the reactor and start stirring to heat up, when the reactor When the temperature rises to 120°C, start to feed oxygen, control the partial pressure of oxygen to be 0.20MPa, cool down after 3 hours of reaction, an...

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Abstract

The invention discloses a treatment method of copper secondary source smelting soot. According to the treatment method, copper secondary source smelting soot is subjected to pressure oxidation leaching in a low-concentration sodium hydroxide system, bromine enters the solution, tin subjected to pressure oxidation enters oxidation leaching residues together with copper and zinc, bromine entering the solution is subjected to pH regulation by oxalic acid and precipitated by lead acetate, and the solution is returned to a basic pressure oxidation leaching system; and tin, copper and zinc entering the oxidation leaching residues are leached by a sulfuric acid system, copper and zinc enter the solution and are further separated and extracted, and tin is enriched in the residue in a form of tin dioxide to be recovered and extracted. By adopting basic pressure oxidation leaching, efficient leaching of bromine in the copper secondary source smelting soot is realized, and the bromine leaching rate is more than or equal to 92%; by further oxidizing tin in the soot, dissolution of tin in the sulfuric acid system is inhibited, so that tin is easily separated from copper and zinc in the sulfuric acid leaching process; and by precipitating bromine with lead acetate, efficient bromine removal is realized, and the bromine precipitation rate is more than or equal to 95%.

Description

technical field [0001] The invention relates to a hydrometallurgical process in the field of metallurgy, in particular to a method for effectively treating smelting soot of copper secondary resources. Background technique [0002] Copper secondary resources include copper-containing materials such as waste copper shavings, copper-containing slag, and copper-containing waste circuit boards. In addition to copper and smelting slag, a part of smelting soot will also be produced. Due to the complex raw materials of copper secondary resources, for example, in addition to valuable metals such as copper, lead, and tin, waste circuit boards are often mixed with plastics that have not been sorted thoroughly during the pretreatment process, which contains a small amount of brominated flame retardants, so it is also The composition of soot produced during the smelting process is relatively complex. Compared with conventional copper concentrate smelting soot and copper converter soot,...

Claims

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Application Information

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IPC IPC(8): C22B7/02
CPCY02P10/20
Inventor 张杜超张新望饶帅令红斌朱鹏春杨天足刘伟锋陈霖
Owner CENT SOUTH UNIV
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