2.1. Materials. The Cu–Fe alloy and slag used in this experiment were obtained via the reduction of copper slag, and their chemical compositions are shown in Table 1.The SEM micrograph and EDS results of the Cu–Fe alloy used in the experiment are shown in Figure 1 [21,22].From the electron microscope, it can be seen that the …
Copper slag is a byproduct of the pyrometallurgical smelting of copper concentrate. It was used in this study to catalyze elemental mercury (Hg0) oxidation in simulated coal combustion flue gas.
Section snippets Materials. The copper converter slag sample was collected by a copper smelting plant located in Yantai, China. Before the experiment of simultaneous removal of NO x and SO 2, the copper slag samples were first dried under 105°C overnight.Then these samples were crushing by a ball mill (XQM240 × 90, …
To recover metal from copper slags, a new process involving two steps of oxidative desulfurization followed by smelting reduction was proposed in which one …
According to the mechanism of sulfur removal easily through oxidation, the process of smelting oxidation desulfurization of copper slags is studied, which supplies a new …
Copper smelting slags are difficult to achieve harmlessness and reduction because of the presence of abundant of fayalite (Fe 2 SiO 4).This work proposed a novel strategy for harmlessness and reduction of copper smelting slags by alkali disaggregation of Fe 2 SiO 4 coupling with acid leaching. The disaggregation changed …
DOI: 10.1016/J.JCLEPRO.2021.127797 Corpus ID: 236238411; Separation and stabilization of arsenic in copper smelting wastewater by zinc slag @article{Xiaoxu2021SeparationAS, title={Separation and stabilization of arsenic in copper smelting wastewater by zinc slag}, author={Duan Xiaoxu and Xuezhu Li and Li Yongkui …
Based on the properties of the raw material, copper can be regenerated in three ways: (1) High-quality scrap copper is directly used to produce copper or copper alloy; (2) copper is produced by the smelting–pyrometallurgical refining–electrolytic refining process; and (3) for waste electronic materials with high content of precious …
A pyrometallurgical modification process relying on reduction roasting, smelting reduction, or molten oxidation [3,4,5] followed by beneficiation methods such as flotation, magnetic separation, or gravity separation [6, 7] have been certified for metallurgical recycling of different types of copper slags. The pyrometallurgical process …
The copper slag oxidation roasting is a gas–solid reaction; the sulfur was adsorbed and consolidated by the CaO coating layer when sulfur oxide gas volatilized. ... Chen L., Ma F. Recovery status of copper recovery by flotation from copper smelting slag. Compr. Util. Miner. Resour. 2017; 1:16–20. [Google ... Chen Q.-Z., Zhu R., Wu J. …
In the experiment of desulfurization, the copper slag (150.0 g) was placed in the weighed alumina crucible (φ40 mm × 90 mm). ... the sulfur in slag was oxidized as SO 2 and the oxidation of slag ... George-Kennedy DP, Hayes PC, Jak E (2010) Investigation of liquidus temperatures and phase equilibria of copper smelting slags in …
Electroslag remelting (ESR) gives a combination of liquid metal refining and solidification structure control. One of the typical aspects of liquid metal refining during ESR for the advanced steel and alloy production is desulfurization. It involves two patterns, i.e., slag-metal reaction and gas-slag reaction (gasifying desulfurization). In this paper, the …
The results mdicate that the rate of copper slags smelting oxidation desulfurization depends on the matte mass transfer rate through the slag phase After the oxidation treatment, sulfur of copper ...
We study the oxidative desulfurization of copper slag at temperatures ranging from 1250 °C to 1450 °C using experimental copper slag as raw material. This is significantly different from the oxidative desulfurization process of low sulfur slag (wS < 0.2 pct) at temperatures > 1500 °C compared with the literature. Based on …
According to the mechanism of sulfur removal easily through oxidation, the process of smelting oxidation desulfurization of copper slags is studied, which …
Copper slag contains a large number of iron elements [1,2,3].By deep reduction and adding tempering agent, not only valuable iron can be extracted from the slag, but also gangue can be fully utilized in the production of mineral wool, glass-ceramics, stone, and so on [4,5,6].However, copper slag contains a lot of Cu, S, and other …
Semantic Scholar extracted view of "Removing sulfur dioxide from smelting flue and increasing resource utilization of copper tailing through the liquid catalytic oxidation" by Lei Tao et al. ... The results can provide a reliable reference and basis for industrial application for flue gas desulfurization with copper tailings and a proposed ...
Key takeaway: 'Smelting oxidation desulfurization of copper slags effectively reduces sulfur content in molten iron, enabling lower sulfur content in smelting reduction with …
experimental study of oxidative desulfurization, desulfurization effects of different oxidants are compared, and the basic principles and rules of oxidative desulfurization …
According to the mechanism of sulfur removal easily through oxidation, the process of smelting oxidation desulfurization of copper slags is studied, which supplies a new thinking for obtaining the molten iron of lower sulfur content by smelting reduction of copper slags. ... The results mdicate that the rate of copper slags smelting oxidation ...
Desulfurization rate of oxidation furnace reached 99.5%. The ... smelting process. Since 1976, this process has been widely used for copper and nickel smelting in the former Soviet Union. China has conducted the improvement ... reacts strongly with oxygen to form lead alloy and slag. The heat required in the smelting process comes from the ...
To achieve "waste controlled by waste", a novel wet process using KMnO 4 /copper converter slag slurry for simultaneously removing SO 2 and NO x from acid-making tail gas was proposed. Through the solid-liquid separation for copper slag slurry, the liquid-phase part has a critical influence on removing NO x and SO 2.Also, the …
According to the mechanism of smelting reduction,the process of smelting reduction ironmaking from copper slag was studied.The effects of slag basicity,holding temperature,holding time and CaF2 addition (mass ratio of CaF2 to CaO) on the iron yield and sulfur,phosphorus removal efficiency from the molten iron were examined.XRD …
Recently, Guo et al. studied the electro-desulfurization behavior of the mixture of copper sulfide and antimony sulfide in NaCl-KCl molten salt at 730℃ [33]. The melting point of Sb 2 S 3 and Cu 2 S mixture with eutectic components is 541℃, which is far lower than that of Cu 2 S (melting point, 1127℃) [65] .
DOI: 10.1016/j.jclepro.2022.133095 Corpus ID: 250655743; Extraction and separation of copper and iron from copper smelting slag: A review @article{Zhou2022ExtractionAS, title={Extraction and separation of copper and iron from copper smelting slag: A review}, author={Wen-tao Zhou and Xiao Liu and Xian-jun Lyu and Wen Xia Gao and Huili Su …
In the process of extracting iron from copper slag, the iron obtained by reduction is difficult to use because of the high content of copper and sulfur. In this paper, the thermodynamics of CO2 desulphurization of slag is simulated using FactSage 7.1. In tube furnace, the desulfurization of copper slag was investigated by changing the temperature and flow …
the process of oxidizing copper slag first and then reducing copper slag to realize metal extraction from copper slag.[3] Several studies on the reduction and dilution mechanism of molten copper slag and desulfu-rization of copper slag have been conducted in the literature. Ueda and Roghani contributed a multiphase system of Cu-Fe-O-S-SiO 2 ...
The results mdicate that the rate of copper slags smelting oxidation desulfurization depends on the matte mass transfer rate through the slag phase After the oxidation treatment, sulfur of copper ...
A new process is proposed for recovering copper from smelting slag using waste cooking oil as a green reductant. More than 70% of waste cooking oil pyrolysis products is hydrogen. In this study, a 70% H2-30% N2 gas mixture was used to simulate pyrolysis products for copper slag reduction experiments. The equilibrium composition, oxygen …
We study the oxidative desulfurization of copper slag at temperatures ranging from 1250 °C to 1450 °C using experimental copper slag as raw material. This …
ore and copper smelting slag ... uses is for molten steel de-oxidation process. The production of ferro-silico-manganese alloy uses man-ganese Table ore, quartz and iron ore as raw materials [20]. The
Sulfidation treatment of copper smelting slag. In the sulfidation experiment, the particle size of the synthesized slag was controlled below 80 mesh (178 µm).The mixture of CaSO 4 and anthracite was pelletized at a pressure of 1.0 MPa in a Ø 4 mm pressing tool, and the weight of every pellet was roughly controlled to be 0.04 g. …
The article presents the results of experimental sulfidization of smelt and converter slags of copper smelting production using granular elemental sulfur at a temperature of 1300 °C in an inert atmosphere without hydrocarbon or metal reducing agents. The distribution of sulfur over products and the behavior of copper are …
The mass ratio of Fe/SiO 2 of copper smelting slag is usually between 1.5~2.0 . In the experimental process, FeO-SiO 2 synthetic slag is prepared by pure compound, and then synthetic copper slag with different sulfur content is prepared by adding Cu 2 S, FeS, and SiO 2. FeO-SiO 2 slag was prepared according to the method …
S.N. Sinha and M. Nagamori, "Activities of CoS and FeS in copper mattes and the behavior of cobalt in copper smelting", Metallurgical Transactions B, 13B, 1982, 461–70. Article Google Scholar
In order to realize the high-value utilization of copper slag, a process for preparing Cu–Fe alloy through the reduction of copper slag is proposed. The sulfur in the alloy exists in the form of matte inclusions, …
The highest oxidation-desulfurization rate was With the participation of cuprous oxide dissolved in the observed at 900 8C, while at 1000 8C, the formation of an slag, the possible interaction reactions between matte and oxidation crust markedly decreased the reaction rate. It slag may be turned out to be extremely difficult to prepare chalcopyrite