The Egyptian copper smelting furnace was filled with a mixture of copper ore, charcoal and iron ore to act as a flux. It was blown for several hours by foot or hand bellows. By the end of the smelt the copper had separated from the slag, which was tapped off. SOURCE Robert Raymond,Out of tfre Fjery Furnace (University Park, PA The Pennsylvania ...

In some plants, flash smelting furnace slag (1.6-2 % Cu) and converter slag (5-7 % Cu) are cleaned in an electric arc furnace, where coke is used …

slag cleaning reactor. It creates the conditions that the furnace is over-dimensioned for the amount of slag from Teniente Converter together with charged solid reverts. Efficiency of copper recovery from a slag in an electric furnace depends on number of factors. The furnace dimensions play significant role, determining slag circulation pattern

Copper slag cover in induction furnace (left), Al-chip melting in rotary furnace with salt slag (right) Source publication Melt Treatment of Copper and Aluminium – The Complex Step Before Casting

Figure 1: Typical slag buildup in a coreless induction furnace (gray shaded areas) The hottest area of medium and high frequency coreless furnaces is at the mid-point of the power coil. All areas of slag deposit will be at a much lower temperature than those occurring at the center of the coil.

investigate the liquidus temperature and the copper losses in slag from the Teniente converter (TC) and from the slag cleaning electrical furnace (EF) …

Keywords: slag cleaning, stirring mode, copper slag, submerged arc furnace, stirring reactor Abstract Slags resulting from pyrometallurgical copper processes are important by-products to be controlled in structure and composition. Due to the significant volumes of slag compared with those of the

invariably lead to significant copper loss in slag, which needs to be recovered by means of reduction and settling in a separate slag cleaning furnace. Reduction of iron oxides from slags using carbon as a reductant in the form of dissolved carbon in iron or graphite has been studied extensively by a large number of researchers. A number of

Windows for slag cleaning – 2 pcs.; Windows for copper cleaning – 1 pcs.; Feeding windows; Gas conduit; Gas burners. Characteristics of raw material. The raw material for the shaft furnace is the slag obtained from the fire refining of copper-containing scrap, with a copper content of 5% or more. Melting of the stock is carried out by ...

perties of flash smelting slags on copper losses during slag cleaning in an electrical furnace. Archives of Metallurgy 32 (1987) 3, 307-319. [10] S. Zhou, Y. Wei, S. Zhang, N. Li, H.Wang, Y. Yang, M. Baratic. Reduction of copper smelting slag using waste co-oking oil. Journal of Cleaner Production 236 (2019), 1-10.

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Furthermore arc furnaces can be used for cleaning of copper slag, which are pro-ducts of the Noranda or Teniente converters. In general the slag product still contains 0.5–1 wt.% of copper and is taken out by a separate tap hole (in Figure 2 at the right-side). The remaining copper content in the slag is determined by the portion of matte,

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 …

Induction furnace is most convenient furnace to melting copper. Some of the many benefits of induction furnaces for melting copper are: Energy and Cost Saving. Optimize production rate, lower cost, and minimize your impact on the environment with an induction furnace. Flexible and Efficient. Induction furnaces are more flexible in alloying.

Copper slag cleaning using the flotation method and/or in an electric furnace is widely adopted in industrial production.[2,3,4,5] The flotation method has the advantages of low energy consumption and low copper content in the slag, but the waste liquid treatment after flotation has always been an issue.

Cleaning experiments of a copper matte smelting slag from the water-jacket furnace was undertaken by direct reduction in a laboratory-scale electric furnace. The effects of coal-to-slag ratio, w, and the reduction time, t, were considered for two different coal/slag mixing procedures. In the first procedure, metallurgical coal was added to the ...

Minimizes air leakage into the furnace, as well as dust emissions from the furnace. Operation. With the Outotec Electric Slag Cleaning Furnace, the cleaning of smelting furnace slag is carried out using surface coke reduction in an electric furnace. The circular or rectangular electric furnace is operated in batches and equipped with ...

Slag-cleaning furnace. Anglo Platinum's Waterval smelter is to be enlarged with the addition by mid-2002 of a 30MVA slag-cleaning furnace to …

Copper slag is a by-product created during the copper smelting and refining process. As refineries draw metal out of copper ore, they produce a large volume of non-metallic dust, soot, and rock. Collectively, these materials make up slag, which can be used for a surprising number of applications in the building and industrial fields.

Recovery of copper in concentrates from slags cooled in the induction furnace and ground for 30 minutes ranged from 87.1 to 96.2 percent with the best recovery obtained on the highest grade slag sample. Copper content of the flotation tailings, which is the most important indicator, ranged from 0.26 to 0.39 percent.

Slag Cleaning Furnace. In this furnace, copper rich oxide slags are melted in electric arc furnaces and coke & copper pyrite are added to reduce copper content in the slag. In order to increase reaction rate, slag is over-heated to produce low viscosity aggressive slag. Dalmia-OCL's Co-clinker series Magnesia Chrome bricks have excellent ...

Slag produced by flash furnace operations contains significantly higher amounts of copper than reverberatory or electric furnaces. Flash furnace slag is treated in a slag cleaning furnace with coke or iron sulfide. Because copper has a higher affinity for sulfur than oxygen, the copper in the slag (as copper oxide) is converted to copper sulfide.

During the last few decades, the pyrometallurgical processes used for cleaning copper smelting slags have been steadily optimized. The electric furnace or rotary slag-cleaning furnace are now generally used to perform this task, giving a level of copper in discard slag typically in the range of 0.55 wt.% and 1.3 wt.%, with most plants reporting copper losses in …

The copper slag cleaning in an electric furnace is based on slag reduction and settling of copper matte inclusions. Copper recovery depends on the slag temperature, degree of magnetite reduction and slag residence time. The formation of solid buildup on the furnace hearth leads to the decrease of furnace volume and slag residence time, affecting

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* In induction melting, furnaces should be charged carefully to avoid bridging of the charge Excessive temperature in the bath below the bridge can cause rapid erosion of the furnace Lining and a dangerous run-through which could cause an explosion. To melt out a bridge After it has formed. 1st tilt the furnace to 30 to 400C and the power supply