Copper smelting slag is produced from copper pyrometallurgy both smelting and converting stages usually grading at 3% The slag may also contains lead & zinc minerals like galena sphalerite and transferred into the alkaline salt melt The equipment used is the so called Harris Cylinder Its performance naturally depends on
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 reduction time and
Spent cathode carbon SCC contains a considerable amount of soluble fluoride which is classified as a hazardous emission In this study SCC is employed to reduce copper slag facilitating the recovery of valuable metals such as copper and iron while simultaneously fixing soluble fluoride The results reveal the substantial influences of these factors
Copper is extensively utilized across various fields due to its exceptional performance Guo et al 2018a Guo et al 2018b Globally nearly 80% of copper is produced utilizing pyrometallurgical methods Potysz et al 2015 However every ton of refined copper produces 2 3 tons of copper slag Tian et al 2021 Annually over 30 million tons of copper
Copper slag waste is considered a potential world resource owing to the huge amounts being produced annually worldwide which contain significant amounts of valuable metals Phiri et al 2021 The global copper slag production is estimated at 752 million tons for the period between 1999 and 2019 from the 13 main producing countries Fig 2
The copper smelting industry generates copper slag as its primary solid waste Tian et al 2021 The pyrometallurgical process extracts approximately 80% of the copper Zuo et al 2022 producing 2 3 tons of copper slag for every 1 ton of copper Qu et al 2023 According to statistics global copper slag emissions in 2022 alone reached million
Africa Cobalt Copper Furnace Hydrometallurgy Pyrometallurgy Recovery Slag Smelter INTRODUCTION Cobalt has had a number of important uses in society since antiquity and its principal use has changed dramatically over time Since at least 2250 BC cobalt based pigments cobalt blue have been
Copper slags have been used as abrasives polishing and cleaning for metallic structures [15 16] and mainly in the building industry concrete manufactured with copper slag [5]; copper slags as fine particles in concrete manufacturing [13]; copper slag as a replacement for the sand in cements [9]; copper slag as a filler in glass epoxy
The recovery of metals from copper slag using biochar was investigated at three different temperatures from 1250 to 1350 °C Each experiment was carried out for 60 min The samples were molten at the reduction temperatures and solidified after quenching SEM micrographs of polished sections show that metal alloy was generated in each temperature
The optimum digestion temperature is 250oC at which a high recovery of copper from copper slag is achieved Figure 7 Copper in the residue at various digestion temperatures Effect of Digestion Time at 250oC Figure 8 shows that 2 hours of digestion at 250oC was adequate 0 20 40 60 80 100 120 140 160
Currently there are three main methods for recovering CS froth flotation pyrometallurgy and hydrometallurgy [18] Flotation utilizes the difference in surface properties of valuable and gangue minerals to recover copper and cobalt from copper slag using different traps frothing agents modifiers and inhibitors
The equipment used in the experiment is an electric mixer JJ 1 Changzhou Guohua Electrical Appliances Co Ltd the temperature is controlled in the range of 20 100 °C by using a water bath DF 101S Shanghai Pu du Biochemical Technology Co Ltd Study on copper recovery of water quenched slag from copper smelter by flotation Min
The known studies of heat treatment of copper slag are mainly directed to the recovery of metals from copper slag at the melting temperature The conditions of increasing the strength of copper slag grains as a result of transition from amorphous to crystalline state during heating have not been studied That is why the paper presents studies of microhardness and
Copper slag CS constitutes the primary residual product arising from the pyrometallurgical process employed in copper refinement [1] Its composition is predominantly characterized by SiO 2 Fe 2 O 3 Fe 3 O 4 and minor quantities of CaO and Al 2 O 3 in addition to the oxides or sulfides of various metals including Cu Pb Zn Ni Cd Co and Ag [2] [3]
Currently there are three main methods for recovering CS froth flotation pyrometallurgy and hydrometallurgy [18] Flotation utilizes the difference in surface properties of valuable and gangue minerals to recover copper and cobalt from copper slag using different traps frothing agents modifiers and inhibitors
The commonly seen slag/dross/residue includes copper dross lead dross tin slag zinc leaching residue antimony/arsenic dross cadmium residue/cake sulfur residue/cake vanadium slag nickel slag iron tailing and iron bearing red mud is a professional company offering metal extracting/ recovery/ recycling solutions We have rich experience in slag
Materials The smelting slag used in this study was obtained from a copper plant in China Mineralogical analysis performed using scanning electron microscope SEM and energy dispersive X ray spectroscope EDS polarizing microscope and X ray diffraction XRD indicated that fayalite Fe 2 SiO 4 and magnetite Fe 3 O 4 phases were major components
Notwithstanding this negative aspect the copper slag does contain valuables which can be recovered by recycling the slag hence mitigating its negative impact by producing economic benefits and returning the affected site to its near natural setting after the slag is removed Metal recovery from the copper slag in this study was performed at a
The recovery of Cu and Fe from copper slag has been found to be feasible using the direct reduction method at temperatures between 1 200°C and 1 500°C Figure 2 shows the equipment diagram for the experiment Figure 2 Schematic diagram of the experimental equipment Display full size
Conventionally little chemical adjustments are made to the slag prior to its processing for subsequent use or disposal However recent attempts have looked into modifying the chemical composition of slag while hot to render its chemistry and properties suitable for high value products or recovery of minerals/metals from slag [11 12] Nonetheless the majority of
Using direct reduction magnetic separation technology to recover iron resources in copper slag has fair recovery effect and short reaction time which is the development trend of comprehensive utilization and industrialization of copper slag in the future Equipment The main experimental equipment includes GSL 1700X horizontal furnace
The recovery of metal from copper slag is of great signi cance to the resource utilization of copper slag and the sustainable development of copper smelting industry
Nearly to tons of copper slag are generated for every one tone production of copper leading to the generation of million tons of copper slag very year; as of now a total of 50
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