Carbothermic Reduction of Copper Slag in the Presence of
Prior to the reduction process, test samples were created by thoroughly mixing 50 g of ground copper slag with borax and charcoal. The borax dosage was Gorai et al. [37] reviewed copper slag characterization and various processing routes comprising pyro and hydrometallurgical methods for metal recovery A comprehensive review on the recovery of copper values from copper slag
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Recovery of Copper, Lead and Zinc 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 Copper slag, generated mainly during copper smelting, and classified as a potentially harmful waste, is an important secondary resource containing not only Comprehensive review on metallurgical recycling and cleaning of copper slag
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Element Distribution and Migration Behavior in the Copper Slag
Depending on the pyrometallurgical process used, copper slag can be divided into smelting slag, blowing slag, refining slag, and dilution slag. The growth rate in recent years would Abstract. An innovative, economical, and environmentally sound hydrometallurgical process has been proposed for recovering Cu, Ni, and Co from copper-rich converter slag by organic acids. In the leaching Minerals Free Full-Text Processing of Waste
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Copper Slag an overview ScienceDirect Topics
Copper Slag. Copper slag, which is the waste material produced in the extraction process of copper metal in refinery plants, has low cost, and its application as a fine aggregate in A technological scheme for copper slag processing was proposed and the process conditions were optimized. The scheme comprises 5 stages, namely: (i) Air Technological scheme for copper slag processing
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Environmental and Socioeconomic Impact of
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, this involves 45 Mt of slag generated in the process (2.2–3 tons of slag/ton copper [2,12,13]), which would represent >20 Mt Fe and 0.5–1 Mt Cu yearly sent to controlled landfills. Therefore, copper slag represents an environmental impact [4]: risks of heavy metals lixiviation, a visual impact, and sometimes occupation of cultivable areas.Recovery of Copper and Magnetite from Copper Slag
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Metal slag processing // REMONDIS´ Lippe Plant
Practically all of the metals contained in the slag can be recovered. Go to recycling process. The special feature of LEGRAN’s metal slag processing system at the Lippe Plant is the way the material is treated. The slag and spent refractories need to be pulverised before they can be processed and this job is carried out by a rod and ball millSection snippets Generation and cleaning of copper slag. Copper pyrometallurgy, which is the primary method for the production of copper can be classified into different types, such as conventional copper smelting process (e.g. blast furnace smelting, reverberatory furnace smelting, and electric-furnace smelting), and modern Comprehensive review on metallurgical recycling and cleaning of copper slag
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Sustainable and Comprehensive Utilization of Copper Slag: A
Overview of copper slag processing routes. Full size image. During flotation entrained sulfides and metals can be almost completely recovered, whereas elements contained in glass and oxidic phases will stay in the slag, which is an important drawback. Therefore, a large degree of crystallization and fine grinding are preconditions The future challenge for copper smelters is to increase metal yield by reducing copper losses and valorizing the slag as a marketable by-product. This can be achieved through further slag cleaning in a conventional submerged arc furnace (SAF) where remaining metallic oxides are reduced, and metal droplets have more settling Development and Design of the First Industrial Magnetohydrodynamic Slag
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Introduction: Metallurgical Slags Royal Society of Chemistry
The slag is then sold by the slag-processing companies on the open market for use in concrete, road bases, cement, or raw building materials. 1 Although commonly marketed for use in construction, the applications of ferrous slags are broadening with research showing that the material may also have use in water and wastewater The recovery of copper and cobalt from ancient copper slags from the Küre region of Turkey was investigated. A fayalitic-type of ancient copper slag containing 1.24% Cu, 0.53% Co and 53.16% Fe(PDF) Recovery of metal values from copper slags by
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Minerals Free Full-Text Processing of Waste Copper Converter Slag
An innovative, economical, and environmentally sound hydrometallurgical process has been proposed for recovering Cu, Ni, and Co from copper-rich converter slag by organic acids. In the leaching experiments, the effects of organic acid concentrations, pulp density, temperature, and time were investigated. Optimum recovery of 99.1% Cu, 89.2% One of the greatest environmental challenges in metal extraction is the generation of a large amount of slag. Most of these slags contain insufficient amounts of valuable metals for economical revalorization, but these concentrations may be harmful for the environment. At present, more than 80% of the global copper products are obtained Feasibility of Recovering Valuable and Toxic Metals from Copper Slag
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Technological scheme for copper slag processing
A technological scheme for copper slag processing is proposed. It comprises 5 stages, namely: (i) air oxidation of the copper slag at a temperature above 800 °C for 2 h; (ii) hydrothermal treatment of the oxidized slag with sodium hydroxide solution (140 g/l) at 190 °C for 3 h; (iii) separation of the solid from the liquid phase by hot GUO Z Q, PAN J,ZHU D Q,et al. Green and efficient utilization of waste ferric-oxide desulfurizer to clean waste copper slag by the smelting reduction-sulfurizing process[J]. Journal of Cleaner Production 2018,199:891-899.有色金属冶炼渣脱硫脱硝研究进展 RCEES
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A new method of full resource utilization of copper slag
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 Globally a large volume of copper slag (Table 1) is produced which can be approximated to 2.2 tons of slag generated for every ton of copper produced [9].The annual worldwide production of slag is approximately 24.6 million tons in the early century [6, 7] and increasing at a rate of 11% per year [6].Table 1 illustrates the magnitude of slag Characterization of copper slag for beneficiation of iron and copper
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Study on thermal analysis kinetics of copper slag reduction
The reaction kinetic parameters and reaction mechanism of reduction process for copper slag were studied, which provided a theoretical basis for iron recovery from copper slag by reduction modification–magnetic separation. The effect of C/O ratio and CaO content on the reduction process of copper slag was discussed in non-isothermal As one of the five major toxic elements, the health threat of arsenic to organisms and ecological environment has attracted serious public attention. As one of the important anthropogenic sources of arsenic, non-ferrous smelting, especially copper smelting, should be listed as a key concern. Therefore, clarifying the behavior of arsenic A review of arsenic reaction behavior in copper smelting
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Chemical Composition Data of the Main Stages of Copper
In the El Teniente Converter, for example, the slag is forwarded to the El Teniente Slag Cleaning Furnace Process, which is a batch decoppering process that reduces magnetite and copper contents in the slag. This is achieved through the injection of a solid, liquid or gaseous reductant directly into the equipment.Recent studies on the iron extraction from copper slag by magnetic separation process 表 4 采用碳热还原- 磁选法从铜渣中回收铁的研究结果 Table 4. Recent studies on the iron recovery from copper slag by carbothermal reduction-magnetic separation process铜渣中铁硅分离的研究进展
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Effect of CaO on Copper Loss and Phase Transformation in Copper Slag
The cleaning of copper slag is an important way to realize the sustainable development of the copper metallurgy industry. CaO is a commonly used additive in the process of slag type regulation and has an important impact on the physicochemical properties of copper slag. However, there are few studies on the mechanism of the Arsenic is a harmful impurity present in copper concentrates [].In copper smelting, converting, and fire refining processes, arsenic can be present in the condensed phases and gas [].Arsenic-containing materials in the off gas is usually collected in the form of dust [].In the condensed phases, the arsenic can be distributed between matte and Distribution and Control of Arsenic during Copper
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