BACKGROUND REPORT PRIMARY COPPER SMELTING …
layer of "slag," which floats on top of the molten matte, and much of the sulfur in the charge is released as sulfur dioxide (SO 2). The slag is frequently skimmed, and the matte is periodically tapped. Heat required for the melting process comes from partial oxidation of …
Smelting Oxidation Desulfurization of Copper Slags ...
12%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. Special attention is given to the effects of the holding temperature, the holding time and CaF2, CaO …
SCI-
Smelting Oxidation Desulfurization of Copper Slags[J]. Journal of Iron and Steel Research, International, 2012, 19(12): 14-20. [266] Liuyi Zhang, Caiyun Han, Hua Wang, Hongping Pu, Dongquan Du, Jiangyan Li, Yongming Luo. One-step synthesis of mesoporous nanosized sulfated zirconia via liquid-crystal template (LCT) method[J].
BACKGROUND REPORT SECONDARY COPPER SMELTING, …
Smelting of low-grade copper scrap begins with melting in either a blast or a rotary furnace, resulting in slag and impure copper. If a blast furnace is used, this copper is charged to a converter, where the purity is increased to about 80 to 90 percent, and then to a reverberatory furnace, where copper of about 99 percent purity is achieved.
Alternative Reduction of Copper Matte in Reduction Process ...
nitrogen to reduce Cu in copper slag.11,12) Kawy and Ahmed using reflection furnace to achieve smelting and recycling of copper anode, the cathode and the residual.13) Zhou X. used copper slag to produce weathering resistant steel.14) By comparing contents of main component in the stainless steel and copper slag, it is known that we can
-Study on Desulfurization …
Abstract:Reaction mechanism of copper extraction tailings as desulfurizer for smelting flue gas was studied.Influence of pH value, flue gas flow rate and slurry concentration on flue gas desulfurization was investigated. The experimental results show that copper tailings have strong ability to …
Copper Blast Furnace Smelting-Copper-
1. Wide adaptability to raw material, from iron, copper, copper-nickel, zinc, lead and zinc-lead complex concentrate; 2. Application of rich-oxygen air blast offers high smelting temperature, enhances hearth capacity and generates high concentration SO 2 gas suitable for sulfuric acid-making; 3.
Materials | Free Full-Text | Influence of Desulfurization ...
Li et al. studied the process the smelting oxidation-reduction process of copper slags with air blowing. And results show that the sulfur content can be reduced …
Copper from Copper Smelting Slag by Oxidation Leaching ...
In this paper, copper was recovered from copper smelting slag by oxidation-ammonia leaching under normal pressure. Ammonia persulfate was employed as oxidizing agent and ammonia as complexing. The results showed that the optimal parameters were as following: the mass ratio of liquid and solid was 4:1, the temperature was 35°C, the leaching time was 180 minutes, the amount of (NH4)2S2O8 was 0 ...
Copper smelting combined with slag cleaning - Inco Limited
The product of slag fuming is crude copper metal 47, some iron and essentially copper free slag. The crude copper metal is recycled to flash furnace 29. More advantageously, reduction operation 45 can comprise contacting slag 35 with a finely divided coke or metal reductant during the cooling of slag 35.
PHYSICOCHEMICAL CHARACTERIZATION OF COPPER SLAG …
slag/ton of blister copper in other smelters of the world. Physico-chemical characterization plays an important role in understanding the behaviour of slags during smelting processes and hence it is important to have a comprehensive knowledge about its management. In …
Smelting Oxidation Desulfurization of Copper Slags ...
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 ...
Off-gas Treatment in Copper Scrap Recycling Industry ...
Off-gas in copper scrap recycling is mainly comes from the melting and refining furance. It is mainly treated by combination of gravity sedimentation, cyclone dust collector and pulse-type baghouse. The sulfur dioxide generated needs to be washed by scrubber where …
(PDF) Microscale simulation of settler processes in copper ...
atmosphere. 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.
*
LI Lei, HU Jianhang, WANG Hua, Study on smelting oxidation desulfurization of copper slags, Journal of Iron and Steel research, international, 19(12), 14(2012) 16 N. V. Manukyan, V. H. Martirosyan, Investigation of the chlorination mechanism of metal oxides by chlorine, Journal of Materials Processing Technology, 142(1), 145(2003)
Iron and copper recovery from copper slags through ...
Abstract: 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 decrease slag melting point.
Study on smelting reduction ironmaking of copper slag ...
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 ...
Lead and Zinc Smelting - IFC
8% for slags, 10% for limestone, and 8% for coke. The processing capacity of the blast furnace ranges from 20 to 80 metric tons per day (tpd). Newer secondary recovery plants use lead paste desulfurization to reduce sulfur dioxide emissions and generation of waste sludge dur-ing smelting. Battery paste containing lead sul-
Dilution of copper slag under reduction of rubber seed oil
Abstract: For the sake of solve the problem of large amounts of carbon dioxide emissions and the environmental pollution caused during the process of copper slag dilution, a new method was proposed that using rubber seed oil replaced the diesel oil as a reducing agent for copper slag dilution. For proving the conception, the thermodynamic theory in the process of copper slag dilution was studied.
Oxidation Treatment of Arsenic Sulfide Slag
Oxidation Treatment of Arsenic Sulfide Slag Li Rui-bing 1*, Yao Zhi-xin, Zhang Ting-an2* and Yu San-san1 1Shenyang University of Chemical technology, Shenyang, China 2Northeastern University, Shenyang, China Introduction Arsenic is generally present in the ores of copper, lead, zinc, and other non-ferrous metals.
Smelting Oxidation Desulfurization of Copper Slags ...
Copper slags smelting oxidation desulfurization is gas-liquid reaction, possible reaction process of which can be illustrated as the following equations: Cu2S+|-02-f-;ySi02=Cu20 · ySi02+S02 (1) FeS- -02+xSi02=FeO · xSi02+S02 (2) 16 Journal of Iron and Steel Research, International Vol. 19 It consists of five steps as follows: 1) 02 ...
RECOVERY OF IRON FROM COPPER FLASH SMELTING SLAGS
Recovery of Iron from Copper Flash Smelting Slags Figure 3 shows the rapid decreasing of copper content in the slag during the first 15 min-utes with the graphite rod introduced into the melt, while the iron concentration is main-tained almost constant over same period of …
Simultaneous NOx and SO2 removal during wet flue gas ...
The study of copper slag has attracted the attention of scholars from both China and around the world. But few have paid attention to its applications in the simultaneous removal of SO 2 and NO x in wet flue gas desulfurization (WFGD), becasue WFGD technique is inappropriate for directly treating NO x owing to the low solubility of NO. This work aims to improve NO x removal efficiency in …
The formation of magnetite in slag from the autogenous ...
Slag, magnetite, autogenous smelting, sulphide copper - zinc concentrate . 1. Introduction . Matte and iron silicate slags during autogenous smelting of sulphide copper zinc concentrates are formed in - Vanyukov's furnace [1, 2]. Significant quantity of non -ferrous metals is lost in slags (Cu, Zn, Pb etc.). Slags are stockpiled
Chapter 6 Copper Production Technology
Figure 6-2.—Early Smelting Technology Charcoal ore flux m The Egyptian copper smelting furnace was filled with a mixture of copper ore, charcoal and iron ore to act as a flux. It was blown for several hours by foot or hand bellows. By the end of the smelt the …
Experimental Study on Oxidative Desulfurization of Molten ...
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 (w S < 0.2 pct) at temperatures > 1500 °C compared with the literature. Based on thermodynamic equilibrium calculation and an experimental study of ...
Copper slag as a catalyst for mercury oxidation in coal ...
Copper slag is a byproduct of the pyrometallurgical smelting of copper concentrate. It was used in this study to catalyze elemental mercury (Hg 0) oxidation in simulated coal combustion flue gas.The copper slag exhibited excellent catalytic performance in Hg 0 oxidation at temperatures between 200 °C and 300 °C. At the most optimal temperature of 250 °C, a Hg 0 oxidation efficiency of 93.8% ...
Refractory Material for Furnaces in Smelting Industry Type
Refractory Material for Furnaces in Smelting Industry Type. 1. Refractroy Material for Blast Furnace. Blast furnaces are widely used in the refining process of metals such as copper, lead, lead, zinc and antimony. The blast furnace consists of a furnace roof, a furnace body, a bed (also called a throat), a hearth, and a tuyere device.
-Sampling Study of Flash …
Such processes in reaction shaft as oxidation, desulfurization, melting, slag and matte formation, and variations of particle size along axial and radical direction of shaft were investigated. Effects of those processes and variations on furnace operation were discussed.
Crystallization Behavior of Copper Smelter Slag During ...
Copper slag is composed of iron silicate obtained by smelting copper concentrate and silica flux. One of the most important criteria for the utilization of this secondary resource is the recovery of iron from the slag matrix to decrease the volume of dumped slag. The molten oxidation process with crushing magnetic separation appears to be a more sustainable approach and is based on directly ...