Leaching of blended copper slag in microwave oven

Turan, M. Deniz; Sarı, Z. Abidin; Miller, Jan D.

doi:10.1016/s1003-6326(17)60161-4

Cited by 45 publications

(6 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the energy consumption and equipment life should also be considered. Subsequently, the reduction degree under experimental temperatures was fitted according to the Equations (2)- (4). The calculated lines of direct reduction kinetics are shown in Figure 13.…”

Section: The Direct Reduction Kinetic Model Analysismentioning

confidence: 99%

“…In China's copper industry, pyrometallurgy technology is presently the primary process for crude copper production [1,2]. In the copper pyrometallurgy process, 2-2.5 tons (metric) of copper slag byproducts are produced for every ton of crude copper produced [3][4][5]. As some papers have reported, in 2019, China's copper output reached 9.8 million tons, and more than 20 million tons of copper slag were produced [6,7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

Zhang

Gao

et al. 2020

Minerals

View full text Add to dashboard Cite

The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt.% coal dosage, and 20 wt.% CaO dosage (0.75 binary basicity), the Fe grade of obtained iron concentration achieved 91.55%, and the Fe recovery was 98.13%. The kinetic studies on reduction indicated that the reduction of copper slag was controlled by the interfacial reaction and carbon gasification at 1050 °C. When at a higher reduction temperature, the copper slag reduction was controlled by the diffusion of the gas. The integral kinetics model research illustrated that the reaction activation energy increased as the reduction of copper slag proceeded. The early reduction of Fe3O4 needed a low reaction activation energy. The subsequent reduction of Fe2SiO4 needed higher reaction activation energy compared with that of Fe3O4 reduction.

show abstract

Section: The Direct Reduction Kinetic Model Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

Zhang

Gao

et al. 2020

Minerals

View full text Add to dashboard Cite

show abstract

“…At present, the main approaches to slag processing can be distinguished: pyrometallurgical, hydrometallurgical (bacterial and chemical leaching, flotation) and combined methods [18,22,23,25,32,35,[38][39][40][41][42][43][44][45][46][47][48][49]. However, these studies mainly relate to the processing of slags from copper production, and often focus exclusively on non-ferrous metal recovery.…”

Section: Introductionmentioning

confidence: 99%

Deep Processing of Dump Slag from the Copper-Nickel Industry

Kasikov

Shchelokova

Timoshchik

et al. 2023

Metals

View full text Add to dashboard Cite

This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia). This process involves the decomposition of slag by diluted solutions of sulfuric acid (7–10 wt.% H2SO4) with a transfer in a solution of more than 70% silicon, 77% iron and 78% magnesium, and a concentration of non-ferrous metals in the residue (~70%). Copper ions were used in the leaching stage to prevent the release of hydrogen sulfide into the working atmosphere. Dehydration of the solution, followed by washing of water-soluble sulphates from silica, was carried out to separate silica from the leaching solution. The dehydration temperature effect on the silica structural characteristics was determined. The possibility of recovering non-ferrous metals from solutions after silica extraction by precipitation, in the form of copper cementite, and the sum of nickel and cobalt sulfides, was evaluated. Pigment-grade iron dioxide, magnesium sulphate and aluminium hydroxide were obtained by dehydration of the solution after extraction of base metals, calcination and other operations. Sulfuric acid leaching resulted in the disclosure of sulfide grains encapsulated in ferrosilicate, which is a favorable factor for flotation. The depleted residue can be successfully used in the construction industry.

show abstract

“…Sulfurized copper ores are generally treated by flotation-smelting-refining [5][6][7]. Although they have reported economic [8] and metallurgical viability, there are environmental problems associated with the emission of sulfur dioxide and arsenic [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Statistical Study for Leaching of Covellite in a Chloride Media

Pérez

Toro

Saldaña

et al. 2020

Metals

View full text Add to dashboard Cite

Covellite is a secondary copper sulfide, and it is not abundant. There are few investigations on this mineral in spite of it being formed during the leaching of chalcocite or digenite; the other investigations on covellite are with the use of mineraloids, copper concentrates, and synthetic covellite. The present investigation applied the surface optimization methodology using a central composite face design to evaluate the effect of leaching time, chloride concentration, and sulfuric acid concentration on the level of copper extraction from covellite (84.3% of purity). Copper is dissolved from a sample of pure covellite without the application of temperature or pressure; the importance of its purity is that the behavior of the parameters is analyzed, isolating the impurities that affect leaching. The chloride came from NaCl, and it was effectuated in a size range from –150 to +106 μm. An ANOVA indicated that the leaching time and chloride concentration have the most significant influence, while the copper extraction was independent of sulfuric acid concentration. The experimental data were described by a highly representative quadratic model obtained by linear regression (R2 = 0.99).

show abstract

Leaching of blended copper slag in microwave oven

Cited by 45 publications

References 33 publications

Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

Deep Processing of Dump Slag from the Copper-Nickel Industry

Statistical Study for Leaching of Covellite in a Chloride Media

Contact Info

Product

Resources

About