With the increases in the costs of iron and copper ores, the incongruity between the significant imports of these ores into China and the ongoing accumulation of unused copper slag has greatly increased. Even so, there are few low-value methods for the utilization of copper slag. The present work demonstrates the processing of this …

In this study, the smelting slag of waste brass was sourced from a copper recycling company in Anhui Province of China. The main chemical composition of the smelting slag as determined by X-ray fluorescence (XRF; Axios mAX, PANalytical, Netherlands) is listed in Table 1.The mineralogical compositions of zinc and copper in …

In this study, a novel method to recover copper, zinc and iron from copper slag by SO 2 –O 2 roasting-leaching-magnetic separation was proposed. The effect of roasting experiment conditions were roasting temperature of 900 °C, holding time of 120 min, and φ SO2 (The volume fraction of SO 2 in the mixed gas of SO 2 and O 2) of …

Abstract. Selenium is a value added by-product of copper process. The lower recovery of selenium from the copper process is attributed to the high loss of selenium in the discarded slag. Knowledge of selenium behavior in slag is very important in the control of the selenium loss. The samples of slag and matte were collected from the smelter ...

This research proposed an efficient and environmentally friendly technology for recovering valuable metals from copper flash converting slag. In a reducing atmosphere, pyrite is used as the sulfurizing agent to efficiently and selectively sulfurize and recover Cu, Pb and Zn of copper flash converting slag. Cu of copper flash converting …

To recover copper from copper slag, a novel slag cleaning method was proposed. The thermodynamics and binary phase diagram of FeO–SiO 2 were calculated first. Then, the effects of experimental parameters on the reduction of Fe 3 O 4, recovery of copper, and slag cleaning mechanism were investigated.The results showed that the …

The copper slag produced by the slag cleaning furnaces as a final by-product, yields copper in the range of 0.55–1.3 wt.% in the discarded slag, with copper losses of most plants in the discarded slag limited between 0.8 wt.% and 1.0 wt.% (Coursol et al., 2012). However, the final copper slag still contains large amounts of valuable …

The results indicate that considering slag copper recovery in the hydrometallurgical cut-off grade algorithms reduces the environmental costs caused by slag dumping and leads to more NPV by 9%. ... India 2011: H–212. Google Scholar PALACIOS J, SÁNCHEZ M. Wastes as resources: Update on recovery of valuable metals from …

This slag, if cooled to 150 °C through the proposed system, can generate as much as 106 Nm 3 of CO + H 2 (molar ratio of H 2 :CO = 3:1) exiting the reactor at 1100 °C. This would represent chemical energy recovery of 0.24 GJ/ton crude steel (0.81 GJ/ton slag) or 51% of the slag thermal energy.

Oxygen partial pressure is a defining thermodynamic variable in the recovery of copper during matte conversion. This study combines theoretical analysis and experiments to investigate the effect of oxygen partial pressure on slag properties and copper separation from slag. Additionally, under high oxygen partial pressure, the …

Large amounts of lead slag are produced during the production of primary lead and secondary lead. Considering lead concentrate smelting as an example, a primary lead smelting system production of 1 t of lead will discharge 7100 kg of lead slag (Hou, 2011).At the secondary lead recycling process, for each ton of metallic lead produced, 100–350 …

Figures 1, 2, and 3 shows the scanning electron micrographs obtained from the SEM analysis of the converter slag, TSL slag and reverberatory slag, respectively. Download : Download high-res image (972KB) Download : Download full-size image Figure 1. Converter slag micrographs: (a) SEM microphotograph showing a fayalite grain, (b) …

Effects of matte grade and SO2 partial pressure on copper content in smelting slag at 1250 °C and Fe/SiO2 1.3, predicted by FactSage 8.2. …

To determine slag properties and the factors influencing these properties for optimization of operating conditions in the copper flash smelting process, the composition and microstructures of the quenched smelting and converting slags have been analyzed. Thermodynamic software FactSage 8.2 has been used to investigate the effects of …

Carbothermal reduction at elevated temperature (near 1440 °C) helped recover a majority of the metal values (e.g., Fe, Cu and Mo) into the iron-rich alloy product which can be a feed material for steel making. On the other hand, the non-metallic residue, the secondary slag, can be used in the glass and ceramic industries.

At present, the electric slag cleaning furnace is used for the recovery of copper from slag. However, due to low recovery efficiency of electric furnace along with high consumption of electrical energy and water, selection of a method to enable minimum energy consumption and maximum recovery of copper seems to be essential. ... India …

The distribution and portion of copper-bearing phases in a fayalite copper slag were studied when the copper content was approximately 0.9 wt.%, the copper-bearing droplets had a particle size ...

Accompanying with the pyrometallurgical processes of copper, a large number of copper smelting slag is generated, in which. the average content of copper reaches more than 1% (reaching or even exceeding China s copper ore grade for smelting). Chinas output of copper slag is up to 15. million tons per year [2].

Leaching tests were carried out at pH 2.5 on ground slag samples (<100 μm). Fig. 1, Fig. 2, Fig. 3, Fig. 4 show the reacted fraction of copper, cobalt zinc and iron during leaching in the temperature range between 24 and 80 °C.. Download : Download full-size image Fig. 1. Temperature effect on copper leaching recovery (10% solid, particle size: …

The obtained copper cathode product was dissolved and the Cu 2+ concentration in it was detected up to 99.67%, and there are almost no impurity ions. Therefore, high purity cathode copper products can be obtained by electrochemical deposition enrichment and selective recovery of Cu in CuS slag, with Cu recovery of over 90% (Table S2).

Flotation of silica and alumina from the slag improved bio‐leaching performance and recovered about 74.0% of copper, 60.0% of nickel and 33.4% cobalt in the bio‐leaching process conducted at ...

Characterization and recovery of copper values from discarded slag, (Institute of Minerals and Materials Technology, Council of Scientific Research, Bhubaneswar, India) p. 561 — 567. Google Scholar C. Gonzalez, R. Parra, A. Klenovcanova, I. Imris, M. Sanchez. Reduction of Chilean copper slags: a waste management project.

Consequently, flotation was attempted to recycle Cu in slag containing copper sulphide components. Three key factors affecting flotation were ascertained, namely, grinding fineness, the collector and the pH value, while the recovery of Cu estimated by ICP and XRF. Copper concentrate grading at 14.47 with 79.66% Cu …

The cleaning of copper slag has attracted increasing attention due to the benet of envi-ronmental protection and circular economy [–127] but the use of slags in other areas is limited [1, 13]. The carbothermic reduction of copper slag is one of the efficient techniques for copper slag cleaning and recovery of its metal values [].

Copper was widely used in India from the 3rd to 4th century BC, ... nickel, titanium, etc. There was also no possibility of iron recovery because the slag was cooled in a slow cooling process. There was no evidence of a slag recycling operation. In this research, we showed the absence of sulphur which is unique to the study of copper slag.

Factors affecting flotation of water-quenched slag from a copper smelting plant in Hubei province,such as grinding fineness,pulp density,pH value and the reagent system,were studied.The results indicate that the best flotation efficiency was obtained with a grinding fineness of 95%-0.074 mm,a pulp density of 30%,a pH value of 7.0 and reagent …

A pyro-hydrometallurgical process for the treatment of copper slag has been developed to accomplish recovery of nickel, cobalt, and copper and reuse of iron source. It was proved that the slag phase was reconstructed by sulfation-sulfate decomposition roasting followed by water leaching, over 95% iron existing as hematite …

Abstract. Copper slag can be treated as a secondary resource since it usually contains a substantial amount of copper and other valuable metals. Characterization of the slags to determine the expected metal recovery is essential for the design of separation flow sheets. In this study, the chemical and mineralogical composition of a copper slag ...

With the purpose of recovering the metal values, in this study the copper slag was reduced by coke and biochar at 1250 °C in an argon gas atmosphere using the isothermal reduction/drop quenching technique. The phase compositions of metal, matte, and slag were determined using electron probe microanalysis (EPMA). The effects of …

Comprehensive Utilization of Copper Slag in a Pyro-Hydrometallurgical Process for Iron Phase Reconstruction and Valuable Metals Recovery February 2023 DOI: 10.1007/978-3-031-22765-3_25