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New residue-free recycling process for copper slag from smelter was developed. By setting pH of leaching process to ∼2.5, 80–90% of Cu can be extracted. Dissolution of calcium silicate matrix can be prevented. The process enables to produce four marketable products.
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As previously noted, the tested copper slag is mainly processed in an electric furnace with three electrodes. The metallic alloy that is the product of this reduction process occurs as a fine-grained suspension. If the copper precipitations are very small, they may float on the surface of the liquid slag (Kucharski 2003). The amount of copper ...
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Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt, silica, and alumina. Slag is a major problem in the metallurgical industries as it is dumped into heaps which have accumulated into millions …
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Due to its high Fe content, copper slag can be a Fe-adjusting material in cement clinker production. However, before utilizing Cu slag as a material resource, it is crucial to perform simultaneous metal extraction. Download conference paper PDF. ... During the metallurgical recycling and cleaner treatment process for copper slag, …
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1. Introduction. Copper slag (CS) is a type of solid waste associated with the production of the copper metal. Approximately 2–3 tons of CS are generated when producing 1 ton of copper metal [1], [2].The annual production of CS is approximately 40 million tons worldwide [2].During the previous decades, large amounts of CS have been …
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Copper telluride slag from copper smelting process is an important source of tellurium (Te). In this work, an efficient and economical hydrometallurgical process for extracting Te from copper telluride slag was proposed. First, H2SO4 and NaClO3 were demonstrated to be effective for separating Te and Cu, and the leaching efficiency of …
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Abstract. Smelting is an important process in copper production to produce matte and slag. The slag, containing about 1–12% Cu, can be further processed to recover the copper contaminated, but recycle of the slag concentrate reduces overall productivity and efficiency of the operation. The best solution is to minimize the copper …
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The utilization of hydrogen reduction of copper slag in a typical TSL process requires a thorough understanding of interfacial phenomena to optimize the kinetics of the process. In this process, the gas–liquid interface can be divided into two distinct regions: the interface in the bubble plume and the interface on the upper surface.
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Abstract. Copper slags can hardly be utilized because the fayalite in it produces silica gel during the dissolution process. This work proposes a new process on sulfuric acid treatment of copper ...
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Copper slag was characterized and processed. The pyro-metallurgical processing prospects to generate utilizable materials were arrived at through rigorous thermodynamic analysis. 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 ...
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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 …
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However, back to the copper slag process, actually copper refineries produce two to three times this granulate waster for each one unit of copper that is purified after melting the rock that has it embedded. Copper incrustations may require more than one melting process before the metal reaches the purity grade required for its ...
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Copper slag which is produced during the smelting process of copper contains materials like iron, alumina, calcium oxide, silica, etc. For every tonne of metal production about 2.2 tonne of slag ...
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However, the main problems, such as, the long reduction duration, high energy consumption and low iron and copper recovery rates are in the direct reduction process of copper slag. Na 2 CO 3 can promote iron grain growth [17], and CaO can promote the separation of Fe and Si [18], which can do a favor to the copper slag …
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Although each pyrometallurgical or hydrometallurgical process can dislodge a portion of arsenic, the smelting process is still the prime procedure for arsenic removal (Wang et al., 2017).No matter which kind of smelting furnace is used, arsenic can be dispersed into copper matte, flue gas and copper slag (Yang et al., 2017).Nonetheless, …
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Although each pyrometallurgical or hydrometallurgical process can dislodge a portion of arsenic, the smelting process is still the prime procedure for arsenic removal (Wang et al., 2017). No matter which kind of smelting furnace is used, arsenic can be dispersed into copper matte, flue gas and copper slag (Yang et al., 2017).
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Sarfo et al. (2017) carried out carbothermal reduction process of copper slag (from the United States) by mixing 12.5% carbon with copper slag and reacting at 1420 °C for 0.75 h. The initial copper slag is reduced to low-grade pig iron with the recovery efficiency of up to 90% (Sarfo et al., 2017). However, non-ferrous metal elements can …
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Mt of copper metal in 2021, it can be estimated that more than 45 Mt of CUS were produced from primary sources assuming a slag to copper ratio of 2.2 [3, 4]. Only 15% of the CUS worldwide was used as a product, where the rest was landlled [4 ]. In order to minimize the amount of waste it is necessary to make more use of copper slag as a …
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The selective reduction impoverishment of slag from copper smelting with addition of charcoal powder and stirring of inert gas is investigated by the aid of metallurgical analysis, SEM and EDX. The results show that the copper content in the slag can be reduced from 5 % to 0.35 % by the selective reduction impoverishment process. The contents of Fe3O4 …
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Copper slag catalyzed H 2 O 2 decomposition into ·OH to remove phenol and UV light accelerate the catalytic oxidation process. The potential of copper slag as a catalyst for eliminating the pesticide tendazole using the heterogeneous photo-Fenton process was investigated under natural solar irradiation at a pH close to neutral (García ...
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During the water-quenching process of the copper slag, approximately 10 tons of circulating water and 1 ton of fresh water are required for processing 1 ton of slag, and the heat of the quenching water cannot be recovered completely. ... Copper slag can be used as an Fe-adjusting material in construction, a cement additive, and asphalt …
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The slag's specific gravity and hardness depend on the iron oxide content within the sample, whereas, much like ferronickel slag, copper slag has a large iron content and can be difficult to grind to usable particle size as a secondary cementitious material and aggregate (Sun et al., 2022).
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Copper slag (CS) is a solid waste produced in the process of copper smelting. Typically, CS contains about 30 − 45% Fe, 30 − 40% SiO 2, and other trace elements (e.g., Zn, Mo, and Pb) (Shibayama et al. 2010; Seyrankaya 2022; Gümüşsoy et al. 2023).According to statistics, with the rapid economic development, the annual output of …
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Waste recycling and reuse is an important component of sustainability. Extensive research is being conducted to address this issue by incorporating industrial by-product such as steel slag, copper slag, fly ash, ferro-chrome slag, and so on into the construction industry. Steel slag, which is mostly calcium carbonate, is created as a by …
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The crude ternary alloy from the process can be used to produce WS by electric arc furnace to replace part of electrolytic copper and nickel. Moreover, an attempted was tried to minimize the harmfulness of hazardous elements by eliminating hazardous elements from the copper slag via the new process.
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The technological process of preparing cathode copper and ternary precursor from CuS slag powder can be roughly divided into the following four stages (Fig. 1): acid leaching-selective electrodeposition of copper-deep impurity removal-regeneration of the ternary precursors. Download : Download high-res image (195KB)
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Copper slags can hardly be utilized because the fayalite in it produces silica gel during the dissolution process. This work proposes a new process on sulfuric acid treatment of copper slag ...
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Copper slag can mix and ground with gypsum and cement clinker to produce cement. This process uses a large amount of copper slag (about 60–70% of the total cement raw materials), and energy consumption can be reduced by 50%. ... According to different copper slag depletion process requirements, the total addition ratio of depleting agent …
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The majority of EAF slag that is processed is from the EAF, and as carbon steel production predominates in the United States, the majority of EAF slag that is processed comes from carbon steel producers. The chemical composition of EAF slag varies according to the steel alloy melted, the source of the scrap used, and EAF …
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The hot copper slag depletion process can be principally delineated into three stages. (1) Slag modification: The first step involves the adjustment of the slag composition by regulating the sulfur potential of the system to facilitate mineral phase transformations, consequently reducing the viscosity of the modified slag.
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The practical steps are as follows: Firstly, samples of the copper slag and reducing agent C were weighed with C/O ratios of 0.6, 0.8, 1, 1.2 and 1.4, respectively, and then homogeneously mixed. Thermal analysis experiments were performed in a high-purity aluminum crucible to study the efect of C/O on reduc-tion.
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Mineralogical phase transform of copper slag during oxidation modification process has been investigated with the goal to provide valuable information for the recovery of copper and iron.
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