Influence of Slag Viscosity on Copper Matte Entrainment …
Immiscible glycerol solution and silicone oil systems in the cold model experiments were used to simulate the matte and slag systems in the copper smelting furnace. In different glycerol-silicone oil systems, air was fed by a syringe pump at different injection flow rates and glass nozzle sizes to control bubble size. The bubble size could be ...
A novel slag cleaning method to recover copper from …
To recover copper from copper slag, a novel slag cleaning method was proposed. The thermodynamics and binary phase diagram of FeO–SiO 2 were calculated first. Then, the …
Characteristics and utilisation of copper slag—a review
The current study investigates the incorporation of copper slag (CS) and stainless steel slag resulting from electric arc furnace operations (EAFSS) as partial replacements for …
Solidification/stabilization of copper-contaminated soil …
The efficiency of the magnesia-activated blast furnace slag for S/S of copper-contaminated soils is evaluated in the present study. The following findings are drawn from the testing: (1) Decrease in the maximum dry density and an increase in the optimum moisture content is observed with increasing percentages of GM. The decrease in MDD is ...
MECHANISM OF BUILDUP FORMATION IN AN …
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 ...
Minimization of Copper Losses in Copper Smelting Slag During Electric
Such conditions include operating the electric furnace at metallic copper saturation, maintaining the %Fe in the electric furnace matte between 6 wt.% and 9 wt.%, not exceeding a slag temperature ...
Improved Settling Mechanisms of an Industrial Copper Smelting Slag …
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. Reduced copper losses …
A Review of Comprehensive Utilization of Copper Slag of …
The electric furnace method, the vacuum depletion technology, and the electric field enrichment method are all physical ways to separate the copper in the copper slag; they have an effect on the metal droplets only but are not applicable to the copper oxide and copper sulfide in the copper slag.
Characteristics and utilisation of copper slag—a review
Nearly 2.2 to 3.0 tons of copper slag are generated for every one-tone production of copper, leading to the generation of 4.5 million tons of copper slag very year; as of now, a total of 50 ...
Alkaline activated cements obtained from ferrous and non …
Two slags from steel production in the electric arc furnace (Alcalá de Guadaira, Sevilla, Spain) were used: electric arc furnace slag (EAFS) (3–5 mm particle size) originated in the primary metallurgy or fusion and ladle furnace slag (LFS) (0–2 mm particle size) originated in the secondary metallurgy or refining of the molten bath produced ...
EFFICIENCY OF COPPER RECOVERY FROM A SLAG IN …
nically entrained matte inclusions and dissolved copper. Copper recovery from the slag requires magnetite reduction to liberate matte inclusions and create conditions for co-reduction of dissolved cuprous oxide. Efficiency of copper recovery from the slag in an electric furnace depends on number of factors, such as slag composition and properties,
Copper recovery from copper slags through flotation …
Moreover, the flotation kinetic model of copper slag was established and the results showed that the movement of copper slag in the flotation process conforms to the first-order kinetics. The addition of sodium carbonate increased the stability of the pulp and improved the flotation kinetics greatly, resulting in a better flotation performance.
An efficient approach to utilize copper smelting slag: …
The hazardous components of copper slag are released into the ambient environment (Li et al., 2021a, Li et al., 2021b, Zolotova et al., 2021), resulting in environmental pollution and unsustainable developmental issues. Copper slag contains 29–45 % Fe, 25–40 % SiO 2, 5–11 % CaO, 3–7 % Al 2 O 3, and other nonferrous
Effect of Slag Properties on Copper Loss in Copper Slag
CaO content in slag can affect copper content from two aspects: (1) chemical dissolution, Ca 2+ and Cu + have similar ionic radii, Ca 2+ could replace partial Cu +, thereby decreasing the chemical dissolution loss of copper in the slag; (2) Ca 2+ is an alkaline ion, which could destroy the complex network structure formed by the silicon ...
Copper Slag
Two types of slag can be produced: an air-cooled copper slag with light black color and a glassy appearance, and granulated copper slag which is porous with a vesicular structure. 26 The specific gravity of copper slag varies as a function of the iron content, between 3.2 and 3.8 kg/m 3, and its water absorption is typically very low (<0.2 wt ...
Alternatives of Copper (I) Oxide Reduction in a Copper …
Reduction in a Copper Slag Cleaning Furnace Goran Vukovi´c, Anton Ishmurzin, Juergen Schmidl, Bojan Zivanovi´c, and Bernhard Handle Abstract As environmental, energy saving, and legislation considerations are becoming ever more important, there is evidently a demand for further improve-
Recovery of Copper, Lead and Zinc from Copper Flash Converting Slag …
This research proposed an efficient and environmentally friendly technology for recovering valuable metals from copper flash converting slag. In a reducing atmosphere, pyrite is used as the sulfurizing agent to efficiently and selectively sulfurize and recover Cu, Pb and Zn of copper flash converting slag. Cu of copper flash converting slag is mainly presented in the …
Cleaning of a copper matte smelting slag from a water-jacket furnace …
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 ...
Reduction of Anode Furnace Slag from Secondary Copper …
Anode furnace slags contain significant amounts of valuable elements such as copper, nickel, tin, lead and zinc. To avoid losses during processing, the slag is typically recycled to upstream ...
Modelling of copper (I) oxide reduction in a …
The trial brick specimens using 100 wt% copper slag replacement for sand not only satisfied all requirements of cement brick in the Korean standard (KS) F 4004, but also the TCLP regulation ...
Recovery of copper from copper blast furnace slag
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-stage …
Co-modification of BOF Slag and Copper Slag to Recover
A novel co-modification method between BOF slag and copper slag is proposed for the effective recovery of valuable metals in the metallurgical slags. The co-modification reactions between the Ca-containing phases in BOF slag and fayalite in copper slag are discussed on the basis of thermodynamic analysis, and the co-modification effect on the phase reconstruction …
Copper Smelting Slag Cleaning in an Electric Furnace by …
In view of the non-renewable reductant resources and carbon neutralization in the process of copper slag cleaning in an electric furnace, this study proposed to use waste …
Comprehensive review on metallurgical recycling and cleaning of copper slag
The application and continuous improvement of the copper slag reduction process in the electric furnace stem from increasingly strict legal restrictions on slag utilization and the financial …
Resource Utilization of Copper Slag with a Focus on
Reduction. The reduction process for copper slag is typically followed by magnetic separation [].Depending on the temperature and intensity of reduction, it can be classified as direct reduction, deep reduction, and smelting reduction []monly used reducing agents include coke, biomass carbon, and natural gas [31, 32].The reduction process converts ferrous …
Modelling of copper (I) oxide reduction in a …
We present a computational fluid mechanics model of tuyere and purging plug injection of reductants into slag that considers a first order heterogenic chemical reaction to model copper oxide...
Alternatives of Copper (I) Oxide Reduction in a Copper Slag …
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 natural ...
Recovery of Copper from Slow Cooled Ausmelt Furnace Slag …
Ausmelt furnace slag contains about 0.9% Cu (mass %). With increasing the amount of Ausmelt furnace slag, the recovery of copper from it will produce an enormous economic yield. The recovery of copper by floatation from slow cooled Ausmelt furnace slag was studied in...
A comprehensive review on the recovery of copper values from copper slag
The load resistivity of copper slag allowed it to be favourable for cutting non-ferrous metals, wood or plastics. W. S. Inynierska [109] reported that copper slag could be an efficient binder instead of ceramic binder in grinding wheel manufacturing. Improved grinding efficiency and decreased energy consumption were obtained by improving the ...
Flash Smelting of Copper
Copper matte and slag melt are separated in the settler. The slag layer is 0.5 m thick, while the copper matte layer is 0.2–1 m thick. Copper matte and slag are discharged intermittently from the furnace. The slag, with a copper content of 1–2%, is cleaned, quenched with water, and then discarded. The copper matte is transferred by a ladle ...