Oxidation Sulfuric Acid Autoclave Leaching of Copper Smelting Production Fine Dust

Metallurgist ◽  
2019 ◽  
Vol 62 (11-12) ◽  
pp. 1244-1249 ◽  
Author(s):  
K. A. Karimov ◽  
S. S. Naboichenko ◽  
A. V. Kritskii ◽  
M. A. Tret’yak ◽  
A. A. Kovyazin
Keyword(s):  
Sulfuric Acid ◽  
Copper Smelting ◽  
Fine Dust ◽  
Autoclave Leaching

Copper Smelting Fine Dust Autoclave Leaching

2019 ◽  
Vol 946 ◽  
pp. 615-620 ◽  
Author(s):  
Anton Kovyazin ◽  
Konstantin L. Timofeev ◽  
Sergey Krauhin
Keyword(s):  
Copper Smelting ◽  
Molar Ratio ◽  
Solution Temperature ◽  
Arsenic Content ◽  
Copper Extraction ◽  
Fine Dust ◽  
Lead Carbonate ◽  
Autoclave Leaching ◽  
Dust Composition ◽  
Copper Zinc

At present, arsenic content in copper concentrates is increasing, which leads to an increase in its content in all smelting products, the largest amount of arsenic is transferred in fine dust (dust composition,%: 10-12 Zn, 11-13 Pb, 8-15 Cu , 12-14 Fe, 5-10 As). Autoclaved leaching of dusts (temperature 160-200 °C, oxygen pressure 0.4-0.8 MPa, molar ratio H2SO4 /(Cu + Zn) = 0.75-2.25) to obtain a copper-zinc solution and a cake containing arsenic, iron and lead was studied. Copper extraction in the solution reaches 92%, zinc 95%. Lead, arsenic and iron are concentrated in the cake. Lead from cake is extracted by leaching in sodium chloride solution (temperature 60-70 ° C, NaCl concentration 300 g / dm3). The extraction of lead into the solution is 95%, subsequently lead is precipitated as lead carbonate.

Study on Treatment of Smelting Contaminated Acid by Evaporation Condensing Process

2014 ◽  
Vol 881-883 ◽  
pp. 564-569
Author(s):  
Da Chao Zhang ◽  
Xiao Lai Liu ◽  
Da Ming Guan ◽  
Xiao Yi Xu ◽  
Su Ying Wu
Keyword(s):  
Sulfuric Acid ◽  
Removal Rate ◽  
Solid Wastes ◽  
Copper Smelting ◽  
High Concentration ◽  
Removal Rates ◽  
Processing Cost ◽  
Valuable Metals ◽  
Different Temperatures ◽  
Copper Zinc

Copper smelting gas producing sulfuric acid process produces contaminated acid which contains high concentration of fluorine, chlorine, arsenic and copper, zinc, lead, cadmium and other metals. The sulfide precipitation and lime neutralization methods have been used at present. Those methods have some deficiencies as which produces a lot of hazardous and unwieldy solid wastes, spends huge processing cost, reuse difficultly the water after treatment. In this paper, according to characteristics of this kind of smelting contaminated acid, evaporation condensing process and the feasibility of recycling arsenic, sulfuric acid and valuable metals were studied. Under the condition of atmospheric heating evaporation, this study explored the distribution characteristics of fluorine, chlorine, sulfate radical, arsenic in condensate and in concentrate and the crystallization removal rates of arsenic trioxide in concentrate at different temperatures and different enrichment ratios. The results show arsenic, fluorine and chloride have good removal rates from contaminated acid by evaporation condensing process. Temperature at 130°C, enrichment multiple in 6~7, the removal rate of arsenic, fluorine and chlorine reached 62%, 88%, 77%. The results also show evaporation condensing process has good application prospects to treat smelting contaminated acid.

Sulfuric Acid Leaching of High-Arsenic Dust from Copper Smelting

Metallurgist ◽  
2016 ◽  
Vol 60 (3-4) ◽  
pp. 456-459 ◽  
Author(s):  
K. A. Karimov ◽  
S. S. Naboichenko
Keyword(s):  
Sulfuric Acid ◽  
Acid Leaching ◽  
Copper Smelting ◽  
Sulfuric Acid Leaching ◽  
High Arsenic

scholarly journals Obtaining selenium concentrate from the slime of the sulfuric acid workshop of the Balkhash copper plant and extracting selenium from it into solution

2020 ◽  
Vol 4 (315) ◽  
pp. 11-24
Author(s):  
A. N. Zagorodnyaya ◽  
◽  
A. S. Sharipova ◽  
X. A. Linnik ◽  
G. S. Ruzakhunova ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Sodium Hydroxide ◽  
Inductively Coupled Plasma ◽  
Large Scale ◽  
Sodium Sulfite ◽  
Sodium Hydroxide Solution ◽  
Colloidal Suspension ◽  
Copper Smelting ◽  
Elemental Selenium ◽  
Mercury Selenide

The article presents the results of large-scale laboratory tests of obtaining selenium concentrate from the slime of the sulfuric acid workshop (hereinafter: slime) of the Balkhash copper smelting plant and the extraction of selenium from it into solution. This slime, in contrast to similar slime from non-ferrous metallurgy plants, significantly differs in chemical and material compositions, especially in the selenium content (4.6 - 12.5 wt.%). Involving it in the production sphere will increase the production of selenium by more than 20% from that obtained by the plant from copper electrolyte slime. The slime is washed with water to remove sulfuric acid, dried at 105 ° C. Selenium concentrate was obtained by sequential leaching of slime with solutions of sodium carbonate and nitric acid, selenium from the concentrate was leached with solutions of sodium sulfite (atmospheric pressure) and sodium hydroxide (high pressure, autoclave leaching). Slime, concentrate, cakes, precipitates isolated from solutions, and solutions were analyzed using modern devices of a new generation: An Optima-8300 inductively coupled plasma spectrometer, an Axios X-ray fluorescence spectrometer, an Optima 2000 atomic emission spectroscope, a D8 Advance diffractometer, a D8 Advance infrared spectrometer Avatar 370. From the slime containing, wt. %: 51.2 Pb, 12.5 Se, 3.21 Hg and other elements, a selenium concentrate was obtained with the composition, wt. %: 0.41 Pb, 59.16 Se, 15.4 Hg. The technological indicators for obtaining a concentrate are given, %: concentrate yield - 20.74, Pb recovery - 0.81, Se - 98.23, Hg - 99.50. According to XRD and IR spectroscopy, the concentrate contains elemental selenium and mercury selenide from 10 selenium substances contained in the slime (given in the article). The extraction of selenium from the concentrate into the solution was, %: sodium sulfite - 76.84, sodium hydroxide - 89.65. The pulp from opening the concentrate with sodium hydroxide solution was filtered very poorly. The filtrates contained a colloidal suspension, which could not be filtered off either under vacuum or centrifugation. Therefore, to determine the qualitative and material composition of the filtrates, salts were obtained by evaporating a certain and then neutralized volume to dryness. It was found that only elemental selenium is leached from the concentrate by solutions of both reagents, while mercury selenide remains in the cakes. Moreover, over time, elemental selenium partially precipitated again from selenium-containing sodium sulfite solutions; the salts contain only elemental selenium. An explanation is given for the transition of soluble selenium salts to its elemental state. Despite the higher recovery of selenium from the concentrate by leaching in autoclaves, taking into account the equipment, the complexity of its maintenance, filtration of the pulp and the chemical composition of the filtrate, it is preferable to use the method of leaching with sodium sulfite.

Regeneration of sulfuric acid from electrolyte waste of the copper - smelting plant using solvent extraction

2018 ◽  
Vol 175 ◽  
pp. 187-192 ◽  
Author(s):  
P.B. Gromov ◽  
A.G. Kasikov ◽  
E.A. Shchelokova ◽  
A.M. Petrova
Keyword(s):  
Sulfuric Acid ◽  
Solvent Extraction ◽  
Copper Smelting ◽  
Smelting Plant ◽  
Copper Smelting Plant
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