Sulfuric Acid Leaching of High-Arsenic Dust from Copper Smelting

Karimov, К. A.; Набойченко, С. С.

doi:10.1007/s11015-016-0313-8

Cited by 29 publications

(11 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Researchers have performed a signicant amount of research into the treatment and resource utilization of RCS y ash and smelting slag to make it harmless. 4,11,12 This research mainly includes water leaching, 13 acid leaching, [14][15][16][17] oxidation leaching, 18,19 bioleaching, 20,21 pressure oxidative leaching, 14 chloride leaching, 22 alkali leaching, 1 controlling potential leaching, 23 the leaching-extraction method and the leachingblast furnace smelting method. 24 The copper and zinc in RCS y ash and smelting slag can be leached using water or dilute sulfuric acid, and the leaching solution and leach residue can be treated using other methods.…”

Section: Introductionmentioning

confidence: 99%

Metal mobility and toxicity of reclaimed copper smelting fly ash and smelting slag

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Metal mobility and toxicity of reclaimed copper smelting fly ash and smelting slag

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The results showed that the optimum parameters for leaching dust were a temperature of 60°C and an initial acid concentration of 25 g/dm 3 . Performing the leaching operation with these parameters maximizes the yields of arsenic, copper, and zinc (98% As, 39% Cu, and 82% Zn) (Karimov and Naboichenko, 2016 ). Yang et al reported the recovery of metals from copper smelting dust via H 2 SO 4 and H 2 O 2 leaching.…”

Section: Introductionmentioning

confidence: 99%

Study on Extraction Separation of Thioarsenite Acid in Alkaline Solution by CO32--Type Tri-n-Octylmethyl-Ammonium Chloride

et al. 2021

View full text Add to dashboard Cite

To overcome the problem of arsenic separation and enrichment from an alkaline leaching solution in arsenic-containing dust, a CO32--type tri-n-octylmethyl-ammonium chloride (TOMAC) method for extracting thioarsenite is proposed in this paper. Considering an alkaline leaching solution as the research object, after vulcanization pretreatment, TOMAC transformation and organic phase saturated extraction capacity were measured, and the extraction mechanism was preliminarily studied. First, Cl−-type quaternary ammonium salt was effectively transformed to HCO3--type by treating organic phase with saturated NaHCO3five times. TOMAC was effectively transformed from HCO3- to CO32- type by alkaline washing with 1.0 mol/l NaOH solution; this washing was repeated thrice. Thereafter, the effects of organic phase composition, phase ratio, extraction time, and temperature on the extraction and separation of arsenic were investigated. The results show that under the conditions of 30% CO32--type TOMAC + 15% sec-octanol + 55% sulfonated kerosene, VO/VA = 1/1, and 5 min extraction at room temperature, the single-stage extraction rate of AsIII is 85.2%. The AsIII concentration in raffinate can be reduced to less than 1.33 × 10−3 mol/l by four-stage countercurrent extraction, and the extraction rate of AsIII can exceed 98.4%.

show abstract

“…They generally involve reduction roasting, in which arsenic is volatilized as As 2 O 3 and then collected, but the processes may result in a secondary pollution of the environment, and the product (As 2 O 3 ) is very difficult to sell because the purity is low (Gao et al, 2014). Therefore, some hydrometallurgical processes have been studied by using hot water leaching (Morales et al, 2010) and acid leaching (Chen et al, 2012; Gonzalez-Montero et al, 2020; Ha et al, 2015; Karimov and Naboichenko, 2016; Liu et al, 2018). In these processes, arsenic and solvable metals (Cu, Zn, and Cd) species can be leached into the leachate.…”

Section: Introductionmentioning

confidence: 99%

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation

Zhang¹,

Feng²,

Jin

2020

Waste Manag Res

View full text Add to dashboard Cite

Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting ashes (HACSA). This study developed an effective separation process of arsenic, lead, and zinc from HACSA via alkali leaching followed by sulfide precipitation. The separation behaviors and optimum conditions for alkali leaching of arsenic and sulfide precipitation of lead and zinc were established respectively as follows: NaOH concentration 3.81 M; temperature 80°C; time 90 minutes; liquid-to-solid ratio 4:1; agitation speed 450 revolutions/minute (r/min) and 2.0 times of theoretical quantity of sodium sulfide (Na2S); temperature 70°C; and time 60 minutes. The results indicated that the leaching rates of As, Pb, and Zn were 92.4%, 36.9% and 13.4%, respectively. More than 99% of lead and zinc were precipitated from the alkali leachate. The scanning electron microscopy/energy dispersive X-ray spectroscopy study confirmed that arsenic was dissolved from HACSA into the alkali leachate. Furthermore, lead and zinc were precipitated as sulfides from the alkali leachate. The proposed process was a good technique for separation of arsenic and enrichment of valuable metals for further centralized treatment separately. It provided high separation efficiency of arsenic and valuable metals, as well as low environmental pollution.

show abstract

Sulfuric Acid Leaching of High-Arsenic Dust from Copper Smelting

Cited by 29 publications

References 2 publications

Metal mobility and toxicity of reclaimed copper smelting fly ash and smelting slag

Metal mobility and toxicity of reclaimed copper smelting fly ash and smelting slag

Study on Extraction Separation of Thioarsenite Acid in Alkaline Solution by CO32--Type Tri-n-Octylmethyl-Ammonium Chloride

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation

Contact Info

Product

Resources

About