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F. Habashi - Large amounts of dust are produced which are usually recycled creating impurity problems. - Slag requires special treatment, e.g., slow cooling, grinding, and flotation or treatment in an electric furnace to recover its high copper content which represents a heavy recycling load.
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Reverberatory furnaces can additionally be fed with molten slag from the later conversion stage to recover the contained copper and other materials with a high copper content. The main...
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Recovery of Copper from Smelter Slags 19 may be Present in the reverb slag in one or more of the following forms: (a) matte, either in suspension or in solution, or both, (b) (c) pellets of copper, and (d) copper silicate. copper oxide, Literature survey indicates that several attempts have been made for
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of heat in a reverberatory furnace is from the top to the bottom zone, i.e., from the flame to the charge to the slag and matte. The thermal effi-ciency in the reverberatory furnace is therefore Iow - about 30 per cent (sum of the heat in the matte and slag, as well as the heat required for endothermic reactions, divided bythe
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been sampled from different parts of smelting process: 1) shaft furnace slag, which is a primary residue from copper concentrate smelting; 2) granulated slag, which is a residue from the electric furnace where the primary Cu-rich slag is processed; 3) Dörschl slag, which is a residue from Pb recovery in reverberatory furnace (from dusts and ...
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Description Rotary reverberatory furnace, also named as anode furnace, is especially used to treat copper scrap (Cu 92% and above) to get copper anode (Cu 99%), which can be further purified by electrorefining to produce 99.99% Cu cathode. The copper cathode can be processed by upward casting machine to standard copper rod.
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It is shown that when the ratio in the furnace charge "stale slag: pyrite cinder" at the level of 2.5, the extraction of non-ferrous metals into the matte is at the level of 90%. ... Wei L, Li C and Sun S 2017 The recovery of copper from smelting slag by flotation process Minerals, Metals and Materials Series 231-237. Google Scholar. Pan Q -Q ...
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Sarrafi et al. (2004) found that 72% copper recovery could be achieved using mercaptobenzothiazole (MBT) as collector from a reverbaratory smelter slag containing a total copper of 1.15%. They also...
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Dialnet-CopperRecoveryThroughSmelterSlagFlotationInAtacama-7736575.pdf - ´ E INVESTIGACION ´ VOL. 41 NO. 1, 2021. Dialnet ...
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Copper extraction from the slag was typically found to be twice as high as that from the slag flotation tailings. Hydrogen peroxide was determined to be the best lixiviant. Thus, copper and iron extractions were 63.4% and 48.6%, respectively, when leaching the slag with 3 M H2O2, after 120 minutes of reaction at room temperature.
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The cells were pulled very hard resulting in a 53% recovery but a severe decrease in grade to 2.8% Cu. Since results of the fourth and fifth days' runs indicated that both the initial grade and recovery specifications could not be achieved at the 87% minus 400 mesh grind, a finer grind (97% minus 400 mesh) was tried on the sixth day.
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contain copper with the content ranging between 0.8 to 5% copper. The slags cannot be discarded due to the high content of copper and hence they are sent to a milling and flotation plant (Slag Mill Plant) for liberation and recovery of copper. This work focuses on optimizing
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The goal of the research was to melt the silver-containing concentrate from the Dukatsk deposit (Magadansk region) in a reverberatory furnace. Preparatory research has established that internal collector smelting is an effective way to recover precious metals from the flotation concentrate of the Dukatsk deposit.
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Apart from copper, nickel is the only other metal of importance present in the concen-trates in any appreciable quantity. About 50 per cent of the total amount of nickel entering the reverberatory furnace is removed in the dump slag (assay value shows 0.2-0.25 per cent Ni) and the balance is taken up by the matte. A partial removal of nickel takes
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Modern production of copper in Bor by melting copper ore started in 1936. Since 1961, it used the reverberatory furnaces for smelting. ... Based on the achived results that can be concluded that the flotation of copper slag was relatively inefficient, recoveries rarely being above 30 %, so that the flotation tailings contain between 0,3 and 0,4 ...
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recovery of copper from reverberatory furnace slag by flotation; used conveyor belt export australia; business proposal for a small scale gold mining company; early mining techniques gold ppt; belt conveyor preventive maintenance; copper concentrator crude ore bin; sayaji jaw crusher 30x15; homebuilt roller mill ore; different theories of ...
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the slags are cooled in air or in an induction furnace. The recovery of copper in concentrates from slag cooled in an induction furnace and crushed for 30 minutes ranged from 87.1 to 96.2 percent, with the best recovery obtained on a sample of premium slag. The copper content in the flotation tailings, which is
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of such British inventions as the reverberatory fur-nace and froth flotation. b Moreover, the miners 6 ... 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 ...
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A method is disclosed for treating dore slag resulting from smelting of a dore furnace charge, by grinding such slag and then subjecting the obtained pulp to froth flotation in the presence of a...
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This was demonstrated in Copper Cliff smelter full-scale tests on one of the seven 9.1 m X 33.5 m nickel reverberatory furnaces. These showed that one tonne of oxygen was equivalent to at least one half tonne of coal and that throughput rate could be increased 33% by a decrease in the nitrogen/oxygen ratio.
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The blister copper is further refined in step 35, for instance in a reverberatory furnace or rotary anode furnace, to upgrade the copper to anode-grade copper containing about 98-99 wt.% copper. This copper is then cast into anodes 36, which are electrolytically refined in step 37 in an aqueous electrolyte containing typically about 120 gpl to ...
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During years of operation, a considerable amount of copper slag has been generated as a by-product and has been dumped. Copper contents. ... Enhancing the flotation recovery of copper minerals in smelter slags from Namibia prior to disposal. By V. Sibanda.
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The slag, containing about 12 percent copper, is cooled slowly in pits for several days, then crushed, ground, and floated to recover a concentrate-which contains, by analysis, 50 percent copper-for recycling to the Noranda furnace. The flotation tail contains 0.5 percent copper and is dis-carded. Furnace offgas at a temperature of
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similar to those occurring in the molten bath of a reverberatory furnace. The matte tapping and slag skimming practices are also similar. Flash furnace smelting consists of blowing fine, dried copper sulfide concentrates and silica flux with air, oxygen-enriched air, or oxygen blast into a hearth-type furnace maintained at approximately 1200 EC ...
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Recovery of copper from copper slag and copper slag flotation tailings 75by oxidative leaching Table 1. Chemical compositions of the copper smelter slag and the slag flotation tailings Constituent Content (wt.%) Copper Slag Slag Flotation Tailings Cu - total 0.97 0.59 Cu - oxides 0.15 0.06 Cu - sulphides 0.82 0.53 SiO 2 33.75 34.62 Al 2 O
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The reverberatory furnace acts to allow these species to approach chemical equilibrium at the furnace operating temperature (approximately 1600 °C at the burner end of the furnace and about 1200 °C at the flue end; the matte is about 1100 °C and the slag is about 1195 °C). In this equilibration process, oxygen associated with copper ...
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Hydrometallurgical pretreatment methods include flotation and leaching to recover copper from slag. Flotation is typically used when slag contains greater than 10 percent copper. The slag is slowly cooled such that large, relatively pure crystals are formed and recovered.
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According to the differences of chemical compositions of various slags, different processing methods are put into practice to recover copper. Flotation [25-27], hydrometallurgical methods [28-32] and copper slags returning to the EF [33] are applied in copper recovery from the slags due to their type of chemical composition.
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Process for recovering copper from molten converter-type slags or other highly oxidized copper smelter slags containing 7-30 percent by weight of magnetite (Fe3O4). The magnetite in the slag is reduced with carbonaceous materials or other solid reductants. While the slag is mixed with a water cooled, metal-bladed mechanical stirrer, the reductant is reacted with the slag.
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The second route was flotation of the slags, roasting of the flotation tailings with pyrite and leaching. The second route was found to be suitable for the treatment of the copper slag studied. In the flotation step, a copper concentrate containing approximately 11% Cu was produced with a 77% recovery while 93% of the cobalt stayed in the tailings.
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Recovery of copper from reverberatory furnace slag by flotation The recovery of copper from reverberatory furnace slag utilizing flotation has been ... to comminution in a ball mill and then was used for flotation ... Chat Now; Impacts Of Slag Mill And Flotation Slag Mill - Slag Powder Production Line - Crusher . 24 Sep 2014 ...
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This is tapped off as a watery liquid and used again in the blast furnace. Silica is then added to the converter to flux iron oxide and any excess soda; this slag is also poured off and the residual copper sulphide blown down to blister copper in the normal way.
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Discard slag Reverberatory/ele ctric furnace ... discarded Offgas containing 70-80% SO2 captured to produce H2SO4 Continuous smelting Copper concentrate. Slag for Continuous smelting cleaning & Combines discard smelting ... Flotation recovery (64% Ni, 16% Cu, 10% S) Low Cu (0.8%) High Cu (3-4%) Nickel sulfide ...
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In this work extraction of copper and iron from a reverberatory furnace slag was studied. A two-step extraction procedure was followed. The first step was roasting of the slag in the presence of sulphuric acid at temperatures between 150 and 800 o C. The second step was leaching of the resulting calcine with distilled water.
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299 c continuous side wall charging 319 d recovery of copper converter slags by flotation 326 e onahama smelter reverberatory furnace flue gas calculations 328 f japanese reverberatory furnace practice affecting s02 emissions 330 g naoshima copper smelter 339 h converter programming 349 i converter slag return: advantages and disadvantages 362 ...
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In the case of copper reverberatory furnace slag, mineralogical studies showed that the cobalt is present as CoO. Copper in the slag is mainly attributed to the presence of copper-rich sulphides. The cobalt oxide, and, to a lesser extent, the copper oxide associated with the silicate / oxide phases, is reduced by Fe from the alloy to form ...
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I claim: 1. A method of treating dore slag which comprises the steps of grinding the slag, mixing the obtained pulp with water to form a slurry, adding a suitable collector to the slurry for selective flotation of precious metals, adding a suitable frother, aerating the slurry to produce a precious metals concentrate in the form of a froth on top of the slurry, and separating said concentrate ...
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recovery of copper consists of roasting, smelting, converting, and electrolytic refining operations. Zinc is obtained by either, roasting and distilling methods, or, roasting and leaching, followed by electro- lytic depositi on of the metal from the leach solution. The aim of this research was to investigate the possibilities of
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A pyrometallurgical process typically allows a 93% to 97% recovery of the lead contained in the scrap. The remaining lead is lost in the slag, a residue which constitutes about 20% to 25% of the total furnace-feeding load (Nunes, 2015 NUNES, J. A. S. Lead recovery from metallurgical slag through flotation.Recife: Federal University of Pernambuco, 2015. 117 p.
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The reverberatory furnaces produced a furnace matte containing about 15% Ni+Cu, which was blown with air in the Peirce-Smith converters to a low-iron sulphur-deficient converter matte (47% Ni, 30% Cu, 0.5% Fe and 22% S). The converter slag, containing about 2.3% Ni+Cu, was returned to the reverberatory furnaces for cleaning.
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