2022年9月25日· After cooling by the slag conveyor, the copper concentrate containing 2944% copper and 3039% iron and the iron concentrate containing 4693% iron and 04% copper are obtained by the combined process of magnetic separation and flotation2020年10月31日· A recent paper showed that the fayalite in the copper slag could be reduced by walnut shell char The iron concentration withMinerals | Free FullText | Recovery of Iron from Copper
2022年7月1日· Copper slag is an artificial metallurgical raw material rich in iron, zinc, copper, lead, and other valuable elements The grade of some metals in the slag even2020年6月4日· Iron Recovery from Copper Slag Through OxidationReduction Magnetic Concentration at Intermediate Temperature Chapter © 2016 1 IntroductionRecovery of iron from copper slag via modified roasting
2022年3月8日· Copper slag is a fayalitebased system and contains abundant valuable resources, such as iron and copper (~40 wt% total iron and 05–30 wt% total Cu) 42013年11月20日· Aiming at recovering iron from highironcontent copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation,Recovery of iron from copper slag by deep reduction and
2022年9月25日· A large amount of copper smelting slag (CSS) containing valuable elements such as copper and iron is produced through smelting2023年8月15日· These slags contain significant quantities of dissolved metals or metallic particles embedded in the fayalite matrix ( Figure 5 a) The most common ore mineralsFeasibility of Recovering Valuable and Toxic Metals from Copper
In the paper, a new technology was developed to improve the beneficiation of copper and iron components from copper slag, by modifying the molten slag to promote the mineralization of valuable minerals and to induce the2011年3月1日· Copper slag contains iron in the range of 42–45%, which can be recovered and recycled along with the contained copper to obtain an iron–copper alloy and a finalRecovery of iron from copper flash smelting slags
2022年4月19日· With the increases in the costs of iron and copper ores, the incongruity between the significant imports of these ores into China and the ongoing accumulation of unused copper slag has greatly increased2018年8月9日· Copper slag, a byproduct of copper pyrometallurgy, inevitably contains a certain amount of copper Oxygenenriched smelting technologies increase the copper content in slag indirectly because ofEffect of Iron Phase Evolution on Copper Separation
2019年4月20日· There are two main ways for recovering iron from the copper slag: (i) first, Fe 2 SiO 4 is oxidized to Fe 3 O 4, and then the Fe 3 O 4 enriched concentrate can be obtained by magnetic separation (Zhang et al, 2005)The iron recovery in concentrate obtained by this way is low, and the Fe 3 O 4 concentrate needs to be reduced again toMolten slag is carried outside and poured into a dump Slag is a byproduct of smelting (pyrometallurgical) ores and recycled metals Slag is mainly a mixture of metal oxides and silicon dioxideBroadly, it can be classified as ferrous (byproducts of processing iron and steel), ferroalloy (byproduct of ferroalloy production) or nonferrous/base metals (bySlag
2022年7月1日· In this study, a novel method to recover copper, zinc and iron from copper slag by SO 2 –O 2 roastingleachingmagnetic separation was proposed The effect of roasting experiment conditions were roasting temperature of 900 °C, holding time of 120 min, and φ SO2 (The volume fraction of SO 2 in the mixed gas of SO 2 and O 2) of2021年2月1日· Porous silicate supported micronano zerovalent iron (PSi@ZVI) was prepared from copper slag (CS) through carbothermal reduction technology, and used as a persulfate (PS) activator for removing organic contaminants Results showed that the properties of the activator were greatly affected by the preparation conditionsPreparation of porous silicate supported micronano zerovalent iron
2018年1月1日· Approximately 20–30 t of copper slag (CS) containing 35%–45% iron is generated for every ton of copper produced during the pyrometallurgical process from copper concentrate2021年9月17日· 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 toIron and copper recovery from copper slags through smelting
2013年11月20日· Aiming at recovering iron from highironcontent copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation, investigated the iron recovery efficiency and optimized the technical conditions When coke powder with 86wt% fixed carbon was used as a reductant, iron was successfully2023年12月1日· The reduction percentage of iron oxide was approximately 82 % under roasting conditions of 15 h at 1373 K Based on these results, a novel scheme for copper slag utilization is proposed that involves chlorination roasting for nonferrous metal removal, reduction roasting for iron oxide reduction, and melting to obtain molten iron andAn efficient approach to utilize copper smelting slag: Separating
2021年4月1日· Globally a large volume of copper slag (Table 1) is produced which can be approximated to 22 tons of slag generated for every ton of copper produced [9]The annual worldwide production of slag is approximately 246 million tons in the early century [6, 7] and increasing at a rate of 11% per year [6]Table 1 illustrates the magnitude of slag2023年1月29日· Copper smelting slag usually contains 1–6 wt% copper, which can be recovered by pyrometallurgical and flotation processes However, the tailing slags still consist of 03–07 wt% Cu and 35–45 wt%Recovery of CuFe Alloy from Copper Smelting Slag
The chemical composition of copper slag varies with the type of furnace The typical composition of smelting slags is Fe (as FeO, Fe 3 O 4) 30–40%; SiO 2 35–40%; Al 2 O 3 up to 10%; and CaO up to 10% The density of copper slag varies between 316 and 387 g/cm 3 based on the amount of iron content The average specific gravity of copper2016年8月2日· In copper slag, iron mainly occurs in fayalite and magnetite, while a certain amount of copper is present as copper oxide 4, 6 Meanwhile, the main phases in the composite additive are fixedMechanism of Mineral Phase Reconstruction for Improving the
2014年5月3日· Physical properties Copper slag grains have a color of black glassy type and a fineness modulus of 35 The hardness is about 7 Moh’s scale Other typical physical properties are given in Table 2In order to use copper slag as a mineral admixture, it was necessary to carry out an experimental study associating grinding time, averageIn the paper, a new technology was developed to improve the beneficiation of copper and iron components from copper slag, by modifying the molten slag to promote the mineralization of valuable minerals and to induce the growth of mineral grains Various parameters, including binary basicity, dosage of compound additive, modificationImproving Beneficiation of Copper and Iron from Copper Slag
2021年7月28日· Copper slag is usually a mixture of iron oxide and silicon dioxide, which exist in the form of fayalite (2FeO·SiO2), and contains ceramic components as SiO2, Al2O3 and CaO depending on the2016年11月20日· Furthermore, copper slag is mainly composed of the fayalite (2FeO⋅SiO 2) phase, which means that iron could potentially be recovered from waste copper slagThus, we proposed adding a reduction stage as an additional step to the conventional copper smelting process in order to achieve both removal of hazardous elements andRecovery of iron and removal of hazardous elements from waste copper slag
2021年2月20日· Results show that metallic iron, quartz solid solution, and cristobalite solid solution are the main phases in reductively roasted copper slag, and most metallic iron particles are wrapped by2022年9月1日· Cleaning of copper slag with RSO (a) presents the macroscopic morphology of copper slag at 1250 °C, when the RSO amount is set as 0 mL and the settling time is 0 h (b) displays an enlarged view of the marked red area in (a) There are many pores and matte particles in the sample, and the foaming slag was observedRecovery of matte from copper slag by using rubber seed oil as
2021年12月3日· Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt,2022年10月1日· Composition: Compared with blastfurnace slag, copper slag contains large amounts of iron, copper, and other metals Therefore, the aspects of metal and waste heat recovery cannot be ignored during the treatment (2) The smelting processes for copper and steel are different, along with the discharge times of the two types of slagAdvances in recovery of valuable metals and waste heat from copper slag
2013年11月14日· A large amount of waste copper slag containing about 35–45 wt% iron is generated every year from pyrometallurgical processes for producing copper from copper concentrateRecovery of iron from the waste copper slag is of great interest for comprehensive use of mineral resource and reduction of environmental problems2013年11月1日· The iron in waste copper slag is mainly in the form of fayalite; therefore, Palacios and Sánchez (2013) and Li et al (2013) have attempted to oxidize fayalite into iron oxides and then recycleRecovery of iron from copper slag by deep reduction and
2022年12月22日· Fe3Si and FeSi intermetallic compounds were prepared by CaCl2–NaCl melt electrolysis at 800 °C from the nonmagnetic copper slag compound The phase transition of the cathode particles with different electrolysis voltages and durations was investigated by Xray fluorescence spectroscopy, inductively coupled plasma2023年3月19日· The reaction kinetic parameters and reaction mechanism of reduction process for copper slag were studied, which provided a theoretical basis for iron recovery from copper slag by reduction modification–magnetic separation The effect of C/O ratio and CaO content on the reduction process of copper slag was discussed in nonStudy on thermal analysis kinetics of copper slag reduction
2022年4月19日· With the increases in the costs of iron and copper ores, the incongruity between the significant imports of these ores into China and the ongoing accumulation of unused copper slag has greatly increased Even so, there are few lowvalue methods for the utilization of copper slag The present work demonstrates the processing of this2022年10月1日· In our previous work, iron silicatecontained copper smelting slag was successfully used to prepare a novel acidbase cement, ferrous oxalate cement by reacting with oxalic acid [22, 23] It was found that the iron compounds contained in copper slag (CS), including fayalite and magnetite, can easily react with oxalic acid at room temperatureA novel iron phosphate cement derived from copper smelting slag
2022年9月25日· China's copper resources are characterized by low grade and complex composition A large amount of copper smelting slag (CSS) containing valuable elements such as copper and iron is produced through smelting With the increasing shortage of copper resources, the full recovery of valuable elements in CSS plays an important part2018年12月1日· These exist in copper slag mainly in the form of fayalite (2FeO · SiO 2 ) This study was intended to recover pig iron from the copper smelting slag by reduction smelting method At the reactionRecovery of Pig Iron from Copper Smelting Slag by Reduction Smelting
1 天前· Fig 10 shows the FTIR spectrum of the raw copper slag sample, and it can be seen that the Fayalite is dominant due to the spectra For the raw copper slag, it can be seen that the peaks in the ranges of 1750–1455 c m − 1, which are associated with Si – O asymmetric stretching vibrations of the v 3 mode in S i O 4 [17]2022年11月30日· Introduction Matte smelting is the main method for copper production, and about 2 tons of slag bearing 30% ~ 40% iron, 05% ~ 2% copper and 25%~30% silicon dioxide generates per ton of copper For the issues of resource conservation and environmental protection, it is of great significance to utilize copper slag efficientlyHighvalued and deep utilization technology of copper slag
2020年9月2日· The copper smelting slag was first crushed, ground, and ovendried at 105 °C for 2 h until the weight remained constant The Al 2 O 3 boat laden with the copper slag was then placed in the furnace upon attaining the predetermined heating rate of 10 °C min −1In addition, nitrogen was introduced into the furnace to prevent the gasified form of2013年11月14日· A large amount of waste copper slag containing about 35–45 wt% iron is generated every year from pyrometallurgical processes for producing copper from copper concentrate Recovery of iron from the waste copper slag is of great interest for comprehensive use of mineral resource and reduction of environmental problems In thisA physicochemical separation process for upgrading iron
2023年2月14日· Copper slag is a major waste produced in pyrometallurgical plants during the smelting and converting operations and has caused heavy environmental contamination A pyrohydrometallurgical process for the treatment of copper slag has been developed to accomplish recovery of nickel, cobalt, and copper and reuse of iron source2016年5月11日· It was found that, with 5% CaO and 13–16% carbon additions, most of the copper and iron can be recovered from copper smelting slag at 1350–1400 °C The copper and iron contents of the reducedPreparation of metallic iron powder from copper slag by
2021年2月1日· Porous silicate supported micronano zerovalent iron (PSi@ZVI) was prepared from copper slag (CS) through carbothermal reduction technology, and used as a persulfate (PS) activator for removing organic contaminants Results showed that the properties of the activator were greatly affected by the pr2019年4月1日· In other studies, the same processes, namely, coalbased reduction and magnetic separation process, were applied to recover iron from copper slag, and similar process indexes were obtained [103Cleaner recycling of iron from waste copper slag by using
2022年2月2日· Full size image The copper content of copper slag is 05–45% or even higher, which is much higher than the 02–03% mining grade of copper mines in China The total iron content in copper slag is about 40%, which is significantly higher than the mineable grade of iron ore in China (TFe > 27%) [ 10 ]2020年9月7日· Approximately 20–30 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 hasSeparation of silicon and iron in copper slag by Springer
