This method for re-treating converter slag, although simple, complicates the operation of the reverberatory furnace and contributes significantly to loss of copper in the reverberatory slag. An economic method for re-treating converter slag separately would increase furnace capacity, produce a lower-grade discard slag, and simplify furnace ...
Secondary copper blast furnace slag was treated with carbon to derive the conditions for maximum recovery of copper with minimum simultaneous reduction of iron oxide.
A significant source of copper losses from pyrometallurgical copper extraction is attributed to dissolved and entrained copper in discarded slag. Entrained copper can be recovered via pyrometallurgical slag cleaning in a settling furnace, where the slag viscosity and copper droplet size distribution (CDSD) are critical parameters. …
Copper slag is a by-product obtained during smelting and refining of copper. The waste copper slag can be used as abrasive tools, road construction, and ballast. Despite increasing rate of reusing copper slag, the huge amount of its annual production is disposed in dumps or stockpiles to date.
Copper slag, a waste solid produced in the copper smelting process, is a high-quality secondary resource with huge output. The recycling and utilization of copper slag is of great interest because it avoids the loss of valuable metals and the threat of harmful metals, and saves a lot of natural resources and energy. This paper firstly …
The maximum recovery of copper in alloy phase was obtained with 5% (by weight) initial carbon in the feed, 2% (by weight) CaO addition to the slag and a …
Secondary copper blast furnace slag was treated with carbon to derive the conditions for maximum recovery of copper with minimum simultaneous reduction of iron oxide. Experiments were carried out to study the effects of parameters such as temperature, carbon addition and CaO addition to the slag on the efficient recovery of copper. A two …
The safe and efficient treatment of copper slag (CS) is an important aspect of the circular economy and green development. In order to reduce the negative environmental impact, CS is used as a precursor to substitute different contents of ground granulated blast furnace slag (GGBS) in the manufacturing of alkali-activated materials (AAM)) in this …
Flash smeltingFlash smelting furnace (FSF) and oxygen bottom-blowing furnaceBottom-blowing furnace (BBF) are the major technologies used in copper industry to produce matte. Different requirements of copper concentrate, furnace arrangement, and operating parameters...
A review on the recovery of copper from waste copper slag. • Discussion on physical beneficiation, pyro- and hydrometallurgical routes. • Critical aspects of froth flotation discussed.
The typical process steps in the pyrometallurgical processing are smelting, converting, fire-refining and anode casting followed by tankhouse electrorefining to copper cathode. Slag is further cleaned in a slag cleaning furnace or directed to slag flotation.
To decrease the copper loss, a cleaning furnace (e.g. electric slag-cleaning furnace, rotary slag-cleaning furnace) is applied after the pyrometallurgical process, followed by a drain slag smelting furnace to clean the copper slag (Shiet al., 2008; …
Abstract Through the reduction reaction of Fe3O4 and graphite rod, the viscosity of slag was reduced and the settlement of matte in slag was promoted. The reduction of Fe3O4 in copper slag by a graphite rod was studied and the kinetics of the reduction process analyzed. The results show that the content of Fe3O4 decreased with …
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. This paper presented a reduction-sulfurization sedimentation process for recovering copper and cobalt from the matte–slag mixture of …
The presence of copper in reverberatory furnace slag is accepted as being due to two factors: chemically dissolved copper and mechanically entrapped matte. Beyond this fact, however, opinions on the nature of the materials involved begin to diverge.
The efficiency of copper recovery from a smelting slag in an electric furnace depends on slag properties, forms of copper and operating parameters of the furnace. The furnace …
The recovery of iron from copper slag is an economically feasible and environmentally significant process due to the increasing volume of slag in primary copper production and the potential for metal losses in discarded slag.
Reduction of copper oxide is an important step of metal recovery and slag cleaning in copper production. This can be achieved by slag treatment with injected reducing agents.
In copper anode furnaces, the installed refractory lining is exposed to chemical attack caused by slag and copper oxide. This results in infiltration of the brick microstructure and corrosion of the bricks' inherent components. Increased temperature level changes the temperature and partial pressure during the furnace operation, as …
In this study, effects of fluxing conditions on cleaning process of Fangyuan bottom blown furnace slag have been investigated with the aim of minimizing the copper loss in …
Hence, the recent trends of copper smelting 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. The reduction of Cu 2 O from slags is carried out by adding carbon/coke or by injection of various reductants (e.g., different types of oil or …
Converter copper slag can be viewed as an important secondary resource for valuable metals, considering its high commercial value. The current research investigates the recycling of copper by a combination of theoretical and experimental methods. Based on a modified Stokes equation, it was determined that copper droplets …
Over 50 million tons of copper slag are produced worldwide annually. Stacking is currently the primary method used to treat copper slag, resulting in …
In the quest to achieve the highest metal recovery during the smelting of copper concentrates, this study has evaluated the minimum level of soluble copper in iron-silicate slags.
copper oxide from a synthetic nonferrous slag by carbon (Reddy et al., 2003). Kinetics of reduction of metal oxides of valuable metals from copper blast furnace slags has not been studied. The present investigation was undertaken to determine conditions favorable for maximum recovery of copper from a copper blast furnace slag.
Aiming at the recovery of copper from smelting slagSmelting slag, a flotationFlotation 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...
Pyrometallurgical production of molten copper generates two slags, smelting and converting. Smelting furnace slag typically contains 1%–2% Cu.
The feasibility of preparing zinc ferrite from high-zinc electric arc furnace (EAF) dust and high-iron copper slag (CS) based on direct microwave roasting of the wastes together was assessed in this study, with a focus on the effect of microwave roasting temperature.
The recovery of copper from smeltery furnace slag by flotation has been studied. By analysis the slag containing 1.61% copper and 27.80g/t silver is available to recovery.
The aim of the present study was to characterize the fayalite crystal phases in two types of copper slag flash smelting furnace slag (FS) and converter (CS) slag, given their possible use in ...