Copper scrap is treated using reverberatory furnaces for melting anode-grade copper (i.e., 95% Cu by weight) and the blast furnace/converter combination for low grades of copper …
Recovery of valuable metals such as copper and nickel from copper blast furnace slag by carbon was studied. The optimum conditions necessary for maximum recovery of these metals with minimum reduction of iron oxide were derived. The effect of several experimental parameters, such as temperature, carbon addition and CaO addition to the …
A carbothermic reduction of nonferrous smelter slag was conducted under the influence of three different slag modifiers to investigate the recovery of cobalt (and copper) versus iron recovery.
The loss of such metallic values and the disposal issues of the enormous quantum of discarded slags have urged reprocessing. These metallurgical wastes, nowadays, represent a promising secondary source of copper. The recovery of copper from these slags can be the right solution to meet the increased demand for copper.
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. …
The effects of the reduction temperature, reductant dosage, and flux dosage on iron recovery from copper tailings were investigated using a combined process of the direct reduction and magnetic separation. The results confirm that it is feasibility of iron recover from copper tailings through direct the combined process.
As a widely used slag treatment technique, pyrometallurgy can recover Cu from copper slag at high recovery ratios. However, it is a complex process, consumes …
ABSTRACT A combination of waste acid leaching and CaO roasting methods was investigated to recover copper from refining slags of copper fire anode furnace and other valuable metals. The influences of the leaching temperature, leaching time, liquid-solid ratio, and airflow rate on the recovery rates of Cu, Fe, and As were …
A combination of waste acid leaching and CaO roasting methods was investigated to recover copper from refining slags of copper fire anode furnace and other valuable metals. The influences of the le...
Another method of copper recovery from Zn-Pb metallurgical slags involves subjecting the molten slag to thermal electrolysis, which is carried out collectively (i.e., in the same furnace) or selectively in several units, where metallic alloys of different compositions are obtained by applying different current–voltage conditions [ 47, 48, 61 ].
A further important aspect is to increase Cu recovery to the matte as recovering more copper is the major economic driver. The study confirms that an increase in the matte grade and temperature lead to higher partitioning of Pb, Zn, and As to the slag.
With the purpose of recovering the metal values, in this study the copper slag was reduced by coke and biochar at 1250 °C in an argon gas atmosphere using the isothermal reduction/drop quenching technique. The phase compositions of metal, matte, and slag were determined using electron probe microanalysis (EPMA). The effects of …
Copper loss in the slag of Khatoonabad flash smelting furnace is estimated to be about 1–3 %. At present, the electric slag cleaning furnace is used for the recovery of copper from slag. However, due to low recovery efficiency of electric furnace along with high consumption of electrical energy and water, selection of a method to enable …
Flotation is one of the most important methods for recovering copper from copper slag, However, traditional grinding may be over grinding sometimes, resulting in …
Several researchers have investigated the possibilities of recovering copper from discarded copper slag. Gravity concentration, froth flotation, roasting and …
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 …
Efficiency of copper recovery from the slag in an electric furnace depends on number of factors, such as slag composition and properties, forms of copper, rate of oxides …
White Pine Copper Company began operating a plant designed to recover copper matte particles from its discarded reverberatory furnace slags in April, 1972. Seasonal operation, generally the months of April through November, continued through October, 1974, shutting down due to feed exhaustion. White Pine reverberatory furnace slags contained …
Low cost and green recycling of titania-bearing slag is an important aspect of the circular economy to ensure the sustainable development of the titanium industry. In this paper, the existing titanium extracting techniques are comprehensively summarized. The principles, advantages, as well as existing problems are clarified in relation to traditional …
A combination of waste acid leaching and CaO roasting methods was investigated to recover copper from refining slags of copper fire anode furnace and other …
Copper slag is a major waste produced in pyrometallurgical plants during the smelting and converting operations and has caused heavy environmental contamination. A pyro-hydrometallurgical process for the treatment of copper slag has been developed to accomplish recovery of nickel, cobalt, and copper and reuse of iron …
Other copper droplets adhere to magnetite particles which are suspended in the slag in a short-range-ordered array. The study also confirms that in the presence of increasing amounts of anthracite as a reducing agent, the magnetite content of the slag is progressively decreased and the recovery of copper from the slag is significantly …
Recover Copper from Reverberatory Furnace Slag. Laboratory and pilot plant investigations have indicated that copper recoveries of 50% can be achieved with …
After mine closure the challenge of environmental rehabilitation and the possible disposal of the slag, triggered a reinvestigation into the viability of slag as a copper resource. Characterisation of the slag as a contribution to the potential copper recovery is the objective of this study.
The recovery of copper from waste copper slags has been studied with various amounts of carbon and alkalinity at different reduction temperatures and time. By optimizing the smelting parameters, the degree of copper recovery can be increased to more than 85% [26].
To recover metal from copper slags, a new process involving two steps of oxidative desulfurization followed by smelting reduction was proposed in which one hazardous waste (waste cathode carbon) was used to treat another (copper slags). The waste cathode carbon is used not only as a reducing agent but also as a fluxing agent to …
Namibia Custom Smelters (NCS) process a range of copper concentrates in their three furnaces, namely; top submerged lance, copper converter and reverberatory furnaces, in order to produce mattes and fayalitic slags. The copper content of …
To show that metal extraction from copper slag can be enhanced using pyrometallurgical processes, a pilot plant was developed at Mintek, South Africa, and the process was then implemented on an industrial scale for recovery of cobalt from copper slag in a DC arc furnace at the Chambishi smelter, Zambia.
Abstract Study on the effect of collectors synergism on flotation recovery of copper from copper smelting slags has been described in this paper. After analysis of flotation tests, modeling of copper recovery from slags containing this metal was done. Following the model validation, optimization of effective parameters on Cu recovery was …
Recovery of copper and cobalt from smelter slag using reductive-sulfurizing smelting method was performed in this study.
Abstract. The technical feasibility of recovering copper, nickel, and cobalt from smelting and converting slags using Ausmelt's top-submerged lancing process has been demonstrated at the pilot ...
Besides significant amount of copper, zinc, and other valuable metals can be obtained from copper slag. This fact stimulates the researches worldwide to development of methods for the recovery of above mentioned metals from metallurgical wastes such as copper smelter slag.
With the continuous exploitation of primary high-quality mineral resources, these resources could be gradually exhausted, so it is of great significance to recover iron-rich basic oxygen furnace (BOF) slag as secondary mineral resources. Given the composition characteristics of BOF slag, a method of synergetic modification of copper …
Commercial application of the DC arc furnace on smelting of copper smelter slag was unique and therefore required extensive literature search to broaden the knowledge of the theory and the practice.
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 …
