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Nov 26, 2018· In the present paper, recovery of valuable metals from copper smelter slag of Balkhash copper plant (Kazakhstan) was investigated. To recover Fe, Zn and Cu to water-soluble form, the mixture of 150 g of copper slag and 60 g of 85% sulfuric acid was granulated and then roasted in the temperature range of 473–643 K (200–370 °C) followed by sulfuric acid leaching.
Copper slag is a by-product created during the copper smelting and refining process. Copper slag is a by-product obtained during the production of copper metal, which can be used as pozzolana in the production of cementing materials. Recycling copper slag to recover metals has been focused on copper recovery. ...
The gas from the copper converting section III inflows via openings 8 into the slag converting section II and the overall converting gas flows through a connecting flue 9 and joins the gas of the smelting section at the furnace uptake 10, e.g. as shown in FIG.
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).
matte with about 60 wt.% of copper, slag nearly saturated with silica and iron with low copper oxide activity 10-3–10-4 and gas phase with low partial pressure of oxygen about 10-5 Pa and low partial pressure of sulfur dioxide in the order between 10–10-1 Pa in El Teniente slag cleaning furnace. This means that the decoppering process, based on
Jan 13, 2021· Copper Smelting Process. In the autogenous system described by this report, sulfide concentrate and silica flux are blown into the furnace through a specially designed burner with oxygen and is flash smelted to about 50-percent copper matte. The matte flows down an inclined crucible, countercurrent to the slag flow, to the converting zone at ...
Dissolution of copper and iron from the calcine was found to be very fast and was complete within the first few minutes. The water temperature in the leaching step was found to have no effect on extraction of copper and iron from the calcine in the range of 30 to 85 oC. Keywords: copper, slag, sulphation, roasting, acid baking, leaching
May 04, 2020· The copper smelting process produces plenty of copper slag every year, which is a hazardous solid waste, but a secondary resource. In the present study, the extraction of copper, nickel, and cobalt from copper slag was investigated through the process of sulfation roasting–water leaching and the process of sulfation roasting–sulfate decomposition roasting–water leaching respectively ...
its copper content can be recovered in a slag cleaning furnace, often electric. The flash furnace offgas contains anywhere from 10 to 80 percent by volume sulfur dioxide (SO 2). In all domestic copper smelting facilities utilizing flash smelting technology, the valuable thermal energy in this
Feb 08, 2017· Abstract. Aiming at the recovery of copper from smelting slag, a flotation approach was studied. It was found that this slag composed of fine particles with complex association and distribution, in which bornite was the main copper-bearing mineral after a detailed mineralogy analysis via polarizing microscope, SEM and XRD.
The present invention relates to a process for recovery of iron from copper slag. This invention particularly relates to a process for recovery of iron from a waste like granulated copper slag generated during the production of copper from its ores by a pyrometallurgical method. The present invention will be useful for solving the ecological and environmental issues with an added economic ...
Copper slag grit having sharp edges and is angular in shape. Copper slag grit is very effective in the removal of old paint, burs, oil, and grease from the component surface. Copper slag is cost-effective but while using it in the sand blasting machine process creates more dust. Most of the Shipbuilding and Ship repair industries had started ...
decreasing copper to a lower content in the final metal phase. However, the copper content in the final slag decreases to a minimum value of 0.06% and the iron decreases from 28.53% to 7.11% with the increasing of coke addition sug-gesting that is possible recover most of the copper content in the slag in the metal phase.
because copper slag has a bond work index of 22 kWh/t and is thus a very hard slag. The process also has reduced flotation recoveries and requires high flotation reagent consumption. The present work shows that digestion of the milled copper slag slurry with concentrated sulphuric
alternative abrasives coal slag, copper slag, and staurolite in comparison to silica sand. Abrasive flow rates, cleaning rates, profiles, and total operating costs were determined for all of these abrasives from tests using 5/16", 3/8", and ½" long venturi nozzles on new millscale-bearing steel at nozzle pressures of 60, 80, 100, 120, and 140 psi.
Copper processing - Copper processing - Roasting, smelting, and converting: Once a concentrate has been produced containing copper and other metals of value (such as gold and silver), the next step is to remove impurity elements. In older processes the concentrate, containing between 5 and 10 percent water, is first roasted in a cylindrical, refractory-lined furnace of either the hearth or ...
Sep 07, 2020· Approximately 2.0–3.0 t of copper slag (CS) containing 35%–45% iron is generated for every ton of copper produced during the pyrometallurgical process from copper concentrate. Therefore, the recovery of iron from CS utilizes a valuable metal and alleviates the environmental stress caused by stockpile. In this paper, a new method has been developed to realize the enrichment of iron in CS ...
Apr 05, 2015· Mihajlović - The effect of cooling rate of slag from primary copper production … 129 In Table 1 an overview is given of copper content in flotation tailings in smelters which process slag by flotation. Table 1. Copper content in flotation tailings in different smelters Smelter %Cu Almalykskii, Russia 0,27 Garfield, USA 0,48 Guixi, China 0,50
cessing, the stability of the process and also the loss of copper with slag depend on its value. Table 1 shows that the content of iron sulfide in the charge is insufficient to maintain the heat balance of the furnace since the bulk of the heat during smelting comes from the oxidation of …
Coal (at 53% fixed carbon) additions varied between 4, 6, 8, 10, and 12 per cent of the mass of the slag. The mode of addition of the coal, and the reduction periods of the tests were also varied (around 30 minutes). The results of the tests are shown in Table III and Figure 7. Table III - Results of 100 kVA Tests on Copper Converter Slag
Copper slag is generated out of copper concentrate while extracting copper in the copper smelting units. It is composed of ferrosilicate material and oxide when the slag is quenched in the cold water. This process makes the slag into a granule form resulting coarser and angular particles. Where is it used?
Nov 01, 2019· Copper slag cleaning in an electric furnace to decrease the copper content of slag is one of the critical processes in the copper smelting process. As shown in Fig. 2, the reduction of slag by WCO was realized in this reactor, through which copper or copper sulphide was collected in a metal/matte phase, and the cleaned slag was discarded or ...
Copper slag is a by-product created during the copper smelting and refining process. Copper slag is a by-product obtained during the production of copper metal, which can be used as pozzolana in the production of cementing materials. Recycling copper slag to recover metals has been focused on copper recovery.
Copper Slag Copper slag, which is produced during pyrometallurgical production of copper, contains a significant amount of Cu together with trace amounts of other heavy metals. According to Gorai et al. (2003), about 2,2 tons of copper slag is generated for every ton of copper …
Jul 06, 2021· Copper slag prices are usually based on a variety of factors, including the metal content and the weight of the copper. To get the best copper slagging, you'll want to know what you're paying for and the type of copper. Copper mining is notoriously difficult, so it's best to take advantage of the services that exist in the mining industry ...
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
Feb 01, 2017· The leaching behaviors of primary copper (Cu) slags originating from Ausmelt, reverbatory, and converter furnaces operating under a single technological process were compared to a residual slag tailing obtained by slag re-processing via flotation and metal recovery. The EN 12457-2 leaching test, used for assessment of the hazardous properties ...
During ISA copper smelting process, ISASMELT furnace discharges a large amount of matte and slag mixture and the separation of them has an important influence on the recovery of valuable metals.