scholarly journals Influence of Slag Composition on the Distribution Behavior of Cu between Liquid Sulfide and Cu-Containing Multicomponent Slag via Thermodynamic and Kinetic Assessment

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 150
Author(s):  
Seung-Hwan Shin ◽  
Sun-Joong Kim
Keyword(s):  
Activity Coefficient ◽  
Thermodynamic Data ◽  
Slag Composition ◽  
Copper Slag ◽  
Copper Smelting ◽  
Liquid Sulfide ◽  
Copper Loss ◽  
Kinetic Assessment ◽  
Coupled Reactions ◽  
Smelting Slag

At present, copper smelting slag is not effectively recycled and is wasted. Copper smelting slag contains FexO at more than 40 mass%. For the utilization of copper slag as a Fe resource, it is necessary to separate the Cu in the slag. For copper recycling from slag, FeS-based matte can be introduced to use sulfurization to concentrate Cu from the slag into the sulfide and finally recover the copper. In a previous paper, a kinetic model was developed to simulate the coupled reactions between the multicomponent slag and FeS-based matte by using previously reported thermodynamic data. Building on this work, we carried out equilibrium experiments to supplement the thermodynamic data used in the previously developed model. An empirical formula for the Cu2O activity coefficient of Cu2O-FeOX-CaO-MgO-SiO2-Al2O3 system slag was obtained. In addition, the effect of alumina content in the slag on the Cu2O activity coefficient in the slag was investigated. The model was also supplemented to account for MgO solubility. By the developed model and the industrial conditions, we investigated the effect of slag composition on the behavior of Cu between matte and Cu2O-FeOX-CaO-MgO-SiO2-Al2O3 system slag for the copper loss.

scholarly journals Environmental geochemistry of the copper slag old dump in the Middle Urals

2020 ◽  
Vol 1 (2) ◽  
pp. 103-109
Author(s):  
Ekaterina Sergeevna ZOLOTOVA ◽  
◽  
Niktor Fedorovich RYABININ ◽  
Keyword(s):  
Inductively Coupled Plasma ◽  
Environmental Geochemistry ◽  
Copper Slag ◽  
Copper Smelter ◽  
Copper Smelting ◽  
Environmental Damage ◽  
Middle Urals ◽  
Plant Parts ◽  
Fine Soil ◽  
Smelting Slag

Relevance of the work. Wastes from mining and processing industries occupy vast areas and cause serious environmental damage. The research results will contribute to the development of biological reclamation of industrial areas and environmental monitoring. Purpose of the work: study of the geochemical features of soils and plants formed on old slags of the Polevsky copper smelter (Middle Urals). Methods of the study. We laid the plot in the relatively flat section of the base of the steep slope of the dump. Complex samples were taken at equal intervals on the transect and included blocks of technogenic soil along with growing plants. The material of the complex sample was divided into fractions by nature (soil, plants) and by size of fragments of copper smelting slag, dried to air-dry state and weighed. The chemical composition of the samples was determined by inductively coupled plasma mass spectrometry. Results. The man-made soil with a thickness of 10–15 cm has formed on the cast copper smelting slag old dump. More than a third of its mass is fine soil (particles less than 1 mm), which is a sorption geochemical barrier. The most elements concentration in fine soil is 1–2 orders of magnitude higher than their concentration in slag stone. Lead, cadmium, bismuth are especially effectively delayed. In the fine soil, the strongest excesses of the maximum permissible concentrations for all regulated elements have been established. It has been confirmed that under unlimited supply conditions of elements migration from slag, plant has an upper accumulation threshold. For the aboveground plant parts, the highest values of the biological absorption coefficient were found for selenium, potassium, calcium, and phosphorus. Conclusions. An environmental assessment of the Polevsky smelter (Middle Urals) old dump was carried out, the geochemical features of the soil and plants were investigated.

scholarly journals A Study on Reduction of Copper Smelting Slag by Carbon for Recycling into Metal Values and Cement Raw Material

2020 ◽  
Author(s):  
Urtnasan Erdenebold ◽  
Jei-Pil Wang
Keyword(s):  
Blast Furnace ◽  
Iron Oxide ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Raw Material ◽  
Copper Smelting ◽  
Pig Iron ◽  
Reduction Smelting ◽  
Smelting Slag ◽  
Furnace Slag

Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag is generated annually in Korea. Oxides in copper smelting slag include ferrous (FeO), ferric oxide (Fe­2O3), silica (SiO­2 from flux), alumina (AI2O3), calcia (CaO) and magnesia (MgO). Main oxides in copper slag, which iron oxide and silica, exist in the form of fayalite (2FeO·SiO2). Since the copper smelting slag contains high content of iron, and copper and zinc. Common applications of copper smelting slag are the value added products such as abrasive tools, roofing granules, road-base construction, railroad ballast, fine aggregate in concrete, etc., as well as the some studies have attempted to recover metal values from copper slag. This research was intended to recovery Fe-Cu alloy, raw material of zinc and produce reformed slag like a blast furnace slag for blast furnace slag cement from copper slag. As a results, it was confirmed that reduction smelting by carbon at temperatures above 1400°С is possible to recover pig iron containing copper from copper smelting slag, and CaO additives in the reduction smelting assist to reduce iron oxide in the fayalite and change the chemical and mineralogical composition of the slag. Copper oxide in the slag can be easily reduced and dissolved in the molten pig iron, and zinc oxide is also reduced to a volatile zinc, which is removed from the furnace as the fumes, by carbon during reduction process. When CaO addition is above 5wt.%, acid slag has been completely transformed to calcium silicate slag and observed like blast furnace slag.

scholarly journals A Study on Reduction of Copper Smelting Slag by Carbon for Recycling into Metal Values and Cement Raw Material

2020 ◽  
Vol 12 (4) ◽  
pp. 1421
Author(s):  
Jei-Pil Wang ◽  
Urtnasan Erdenebold
Keyword(s):  
Blast Furnace ◽  
Iron Oxide ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Raw Material ◽  
Copper Smelting ◽  
Pig Iron ◽  
Reduction Smelting ◽  
Smelting Slag ◽  
Furnace Slag

Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag are generated annually in Korea. The oxides in copper smelting slag include ferrous (FeO), ferric oxide (Fe2O3), silica (SiO2 from flux), alumina (AI2O3), calcia (CaO) and magnesia (MgO). The main oxides in copper slag, which are iron oxide and silica, exist in the form of fayalite (2FeO·SiO2). Since copper smelting slag contains high content of iron, and copper and zinc, common applications of copper smelting slag can be used in value-added products such as abrasive tools, roofing granules, road-base construction, railroad ballast, fine aggregate in concrete, etc. Some studies have attempted to recover metal values from copper slag. This research was intended to recover ferrous alloy contained Cu, a raw material of zinc, from copper slag, and produce reformed slag such as blast furnace slag for Portland cement. As a result, it was confirmed that with reduction smelting by carbon at temperatures above 1400 °C, it is possible to recover pig iron containing copper from copper smelting slag, and the addition of CaO in reduction smelting helped to reduce iron oxide in the fayalite and change the chemical and mineralogical composition of the slag. The copper oxide in the slag can be easily reduced and dissolved in the molten pig iron, and zinc oxide is also reduced to a volatile zinc, which is removed from the furnace as fumes, by carbon during the reduction process. When CaO addition is above 5%, acid slag is completely transformed into calcium silicate slag and is observed to be like blast furnace slag.

Pyrometallurgical Processing of Copper-Smelting Slags

2013 ◽  
Vol 746 ◽  
pp. 511-514
Author(s):  
Dmitriy V. Stadnichenko ◽  
Edis B. Ten ◽  
Vladimir N. Krasnov ◽  
Eugeniy A. Shangin ◽  
Vladimir A. Volkov ◽  
...  
Keyword(s):  
Slag Composition ◽  
Copper Slag ◽  
Processing Technology ◽  
Copper Smelting ◽  
Two Stage ◽  
Metallic Part ◽  
Pyrometallurgical Processing ◽  
The Individual ◽  
Slag Processing

t is considered an actuality and problems of the Copper-smelting slags processing. It is formulated the demands, which the slag processing technology must to conform. It is given the ground for preferableness of the pyrometallurgical method, which it is caused the next factors: a) variety of slag composition, forming on the Copper founding plants and b) necessity of its selective proceeding with using the individual technology regimes. It is offered the two stage technology for Copper slag pyrometallurgical processing, which allows to extract from slag the metallic part during the separating smelting, and during the reducing smelting to extract the metallic components from nonmetallic part, where its presents at the chemical combined condition. It is presented the experimental dates about output of metal during the every smelting stage and the kinetic of reducing extraction.

scholarly journals Behavior of copper and lead during mineralurgical and hydrometallurgical processing of flash smelting slag

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Krzysztof Gargul ◽  
Bożena Boryczko ◽  
Andżelika Bukowska ◽  
Adam Hołda ◽  
Stanisław Małecki ◽  
...  
Keyword(s):  
Reduction Process ◽  
Copper Slag ◽  
Original Method ◽  
Flash Smelting ◽  
Sieve Analysis ◽  
Selective Enrichment ◽  
Hydrometallurgical Processing ◽  
Useful Components ◽  
Smelting Slag ◽  
The Many

AbstractThere are only a few smelters processing copper concentrates directly into blister copper. Despite the many advantages of this process, a serious challenge of this technology is the need to process the resulting flash smelting slag. It contains 12–15% copper and 2.5–4% lead. In this form, it cannot be considered as waste material and, therefore, a high-temperature reduction process is carried out. This decopperization process is energy- and time-consuming. The use of mineralurgical and hydrometallurgical processes, selective enrichment of the appropriate slag fractions in copper and lead, followed by its hydrometallurgical processing and recovery of Cu and Pb could be an interesting supplement to the methods used so far. The article presents results of research on the possibility of separation of useful components from copper slag using the original method of sieve analysis, gravitational enrichment and magnetic separation. Preliminary results of tests were made on a laboratory scale. Then, selective leaching of copper and lead from flash smelting slag was carried out, obtaining very promising results.

scholarly journals Effect of Al2O3, MgO, and CuOx on the dissolution behavior of rhodium in the Na2O-SiO2 slags

2013 ◽  
Vol 49 (2) ◽  
pp. 131-138 ◽  
Author(s):  
C. Wiraseranee ◽  
T. Yoshikawa ◽  
T.H. Okabe ◽  
K. Morita
Keyword(s):  
High Temperature ◽  
Thermodynamic Properties ◽  
Activity Coefficient ◽  
Sodium Silicate ◽  
Slag Composition ◽  
Slag Basicity ◽  
Optical Basicity ◽  
Dissolution Behavior ◽  
Recycling Process ◽  
Oxide Addition

Aiming to optimize rhodium recovery in the high temperature recycling process by minimizing rhodium loss into slags in an oxidizing atmosphere by controlling slag composition, the effects of representative slag components, such as Al2O3, MgO, and CuOx, on the dissolution behavior of rhodium into the Na2O-SiO2 slags was investigated. The solubility of rhodium was measured by equilibrating the sodium silicate based slags with pure solid rhodium at 1473 K in air. Considering that rhodium dissolved into slags as RhO1.5, the effect of the oxide addition on the activity coefficient of RhO1.5 in slags was determined. The dissolution of rhodium in slags was suppressed by the addition of Al2O3 and MgO, where Al2O3 behaved as an acidic oxide and MgO behaved as a diluent of slag basicity at a fixed Na2O/SiO2 ratio of 0.97. The content of copper in solid rhodium equilibrated with the CuOx bearing slags slightly increased with increasing content of CuOx, and CuOx was found to slightly enhance the dissolution of rhodium. Rhodate capacity of all slag systems increased with increasing optical basicity, suggesting that the correlation between rhodate capacity and the optical basicity enables the estimation of the content of rhodium in slags of which thermodynamic properties of rhodium are not clarified.

scholarly journals Ferro-silico-manganese production from manganese ore and copper smelting slag

2020 ◽  
Vol 9 (6) ◽  
pp. 13625-13634
Author(s):  
Zulfiadi Zulhan ◽  
Irfan Muhammad Fauzian ◽  
Taufiq Hidayat
Keyword(s):  
Copper Smelting ◽  
Manganese Ore ◽  
Smelting Slag
Sign in / Sign up

Export Citation Format

Share Document