The smelting reduction process is a method where waste slag is carbothermally smelted to acquire molten iron by reducing "FeO" to metallic iron at ... Usoltsev, V.A.; Vasilyev, F.K. Leaching of copper and zinc from copper converter slag flotation tailings using H 2 SO 4 and biologically generated Fe 2 (SO4) 3. Hydrometallurgy 2012, 119, 40 ...

A Study on Reduction of Copper Smelting Slag by Carbon for Recycling into Metal Values and Cement ... 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, ... waste copper slag from G Company was used. The molten slag ...

1. Introduction. Copper slag is rejected in copper smelting and converting process as waste. It is estimated that nearly 2.0–3.0 tons of copper slag are generated per ton of copper produced in the whole process [1,2].About 25 million tons of copper slag is discharged into the environment per year in worldwide [].Generally, the copper slag contains many valuable metals, such as copper and ...

considered as a copper slag. Recovery of pig iron containing copper from copper smelting slag by reduction smelting was also recently examined, and successfully performed, and produced the pig iron [ 9-11 ]. The flotation concentrate from gold mining tailings in Jeonnam Province was used in this research. The experiments included the

The invention relates to a method for reducing and extracting copper smelting waste slag through microwave carbon heating, which comprises the following steps: pulverizing copper slag, reducing agents (one material or a mixture of several materials in anthracitic coal, graphite, refinery coke and coke) and calcium oxide or calcium carbonate; mixing the ingredients; adding binding agents for ...

PDF | Waste copper slag is a typical hazardous solid waste containing a variety of valuable elements and has not been effectively disposed of so far. In... | …

Tailings from flotation of copper slag are a second RCRA special waste. ... waste. After removing the slag, additional air or oxygen is blown in to oxidize the ... refining is the reduction of the copper and oxygen removal by feeding a reducing gas such as ammonia, reformed gas, or natural gas into the copper while it is still ...

In the production of copper from sulfide ore, slag accumulates at the processing plant. In the present work, the phase transformations that occur in such slag during its reduction by the gasification products of carbon at 1100 and 1200°C are investigated. Experiments show that most of the iron present in such slag may be converted to metallic form by the gasification products of carbon in ...

These oxide and sulfide phases of copper are mostly present within the slag phase and to some extent the slag is also embedded inside the oxide and sulfide phases. The recovery of copper values from the discarded slag has been explored by applying a flotation technique using conventional sodium isopropyl xanthate (SIX) as the collector.

Flotation waste of copper slag (FWCS) was used as a raw material for the preparation of a micro-electrolysis material (MEM) through a carbothermal reduction process. The performance of MEM was evaluated for the degradation of organic contaminants in water. The effects of preparation conditions on the performance of MEM were investigated.

Muravyov M I, Fomchenko N V., Usoltsev A V., Vasilyev E A and Kondrat'Eva T F 2012 Leaching of copper and zinc from copper converter slag flotation tailings using H 2SO 4 and biologically generated Fe 2(SO 4) 3 Hydrometallurgy 119 40-6. Google Scholar

Solid waste management in non-ferrous industries in Índia. Resources, Conservation and Recycling 42 (2004) 99–120 Solid waste management in non-ferrous industries in India A. Agrawal∗, K.K. Sahu, B.D. Pandey Non-Ferrous Process Division, National Metallurgical Laboratory, (Council of Scientific & Industrial Research), Jamshedpur 831007 ...

The optimal slag magnetite reducing agent is determined to be zinc production waste. Keywords: slag, processing, reducing agent, zinc-clinker clinker., chemical reactions, depletion, flotation, ideal mixing apparatus, low-waste production. Processing of copper production slags remains one of the most complex and unresolved problems of

For an air-cooled slag at optimized conditions, 72% of copper was recovered in one stage flotation and a 12.6% copper concentrate was achieved. The best recovery efficiency was obtained when 30 g ...

The compositions of waste copper slag are similar, which mainly are silica, alumina, calcia, and iron oxides. However, the content of compositions in slag varies because of different smelting process or raw materials adapted. Due to the depletion of the waste copper slag with the flotation process, the content of Cu in this slag is low.

Copper slag wastes, even if treated via processes such as flotation for metal recovery, still contain heavy metals with hazardous properties posing environmental risks for disposal. This study reports the potential use of flotation waste of a copper slag (FWCS) as iron source in the production of Portland cement clinker.

In copper smelting, slag cleaning is performed by either of two major technologies: slag milling and flotation, or reduction followed by settling in an electric furnace . In contrast, slags produced in the nickel [ 4 ], lead [ 5 ], and tin [ 6 ] industries typically are cleaned in an electric furnace process using coke reduction.

The utilization of solid waste is the challenge for the civil and environmental engineers to utilize the waste from different industry to excel the sustainable development, and in the same time, it is matching with the cost concern of the present materials. Copper slag is a by-product obtained during smelting and refining of copper. The waste copper slag can be used as abrasive tools, road ...

Mintek has been working on the recovery of cobalt, and the associated valuable metals, from slags, since 1988, using DC-arc furnace technology to effect selective carbothermic reduction of the oxides of cobalt, nickel, copper, (and zinc, where present), while retaining the maximum possible quantity of iron as oxide in the slag.

A method for the continuous recovery of non-iron metals from a molten metallurgical slag containing lead, copper or nickel by continuously reducing the layer with carbon dust. The metal layer produced at the furnace bottom is maintained sufficiently thin so that it is between 0 and 20 mm thick. Injection of carbon dust into the metal layer is avoided.

1.. IntroductionLarge quantities of waste materials such as copper slag are produced as a by-product of industrial operations. The extraction of copper from sulphide ores is usually carried out within a pyrometallurgical process route, which involves the mining activities and concentration of the ore often via flotation followed by smelting and refining operations to produce pure copper metal .

The high lead slag enters into the second bottom blowing furnace for reduction to produce lead bullion and zinc slag. The zinc slag is further charged into the fuming furnace to recover zinc oxide powder and harmless residue. Off-gas from oxidation stage is directed to acid-making process and that from reduction and fuming stage are ...

Copper smelters produce large amounts of copper slag or copper flotation waste and the dumping of these quantities of copper slag causes economic, environmental and space problems. The aim of this study was to perform a laboratory investigation to assess the feasibility of immobilizing the heavy metals contained in copper flotation waste.

Abstract and Figures. This study investigated leaching of metals i.e. Cu, Co and Zn from flotation tailings of a copper smelter slag using sulphuric acid solutions in the absence/presence of ...

The article analyzes the scientific problems of the copper industry. In particular, the main problem with the classical production of copper is the causes of large amounts of slag and the negative impact of these wastes on the environment.

Copper smelting production is characterized by formation of a large amount of waste, the majority of which is slags. During the production of 1 ton of copper there is 2–4 tons of smelting, converter, and refining conversions slags [].Flotation treatment of slags with extraction into concentrate of part of the copper in PO Balkhashtsvetmet started in 1992 [2, 5].

Copper Slag Air-cooled copper slag has a black color and glassy appearance. As a general rule, the specific gravity will vary with iron content, from a low of 2.8 to as high as 3.8. (15) The unit weight of copper slag is somewhat higher than that of conventional aggregate. The absorption of the material is typically very low (0.13 percent). (17)

Tailings from an industrial copper slag cleaning milling and flotation circuit have been pre-reduced at low temperatures, well below its melting point, using CH 4-H 2-Ar mixtures with the aim of metallizing its iron oxide component to metallic iron.The treatment carried out at 700–900 °C, with a duration of up to 90 min, indicated a complete transformation of magnetite within the first 30 ...

The present invention provides a method of separating and recovering iron from a waste non-ferrous slag, generated in a process for smelting of non-ferrous metals, including copper, zinc and lead, in which a reducing agent and a reaction catalyst are added to the crushed waste non-ferrous slag, and the mixture is subjected to a reduction reaction, thereby converting amorphous iron oxides ...

Waste copper slag is a typical hazardous solid waste containing a variety of valuable elements and has not been effectively disposed of so far. In this paper, a stepwise extraction process was proposed to recover valuable elements (copper, iron, lead and zinc) from waste copper slag. The specific procedures are as follows: 1) A flotation process was adopted to enrich copper, and when the ...

The present invention provides a method of separating and recovering iron from a waste non-ferrous slag, generated in a process for smelting of non-ferrous metals, including copper, zinc and lead, in which a reducing agent and a reaction catalyst are added to the crushed waste non-ferrous slag, and the mixture is subjected to a reduction reaction, thereby converting amorphous iron oxides ...

samples to determine the copper deportment across the spectrum of the size classes. Three slag samples (converter slag, TSL slag, reverb slag) were submitted to an external laboratory, SGS (South Africa). Mineral-ogical analyses on the slags were performed, particularly for the copper and zinc phases. 2.3. Milling and flotation test work 2.3.1.