Lead metal emission and its atmospheric environmental impact predict research for a secondary copper smelting process

2012 ◽  
Author(s):  
Li Li ◽  
Xiaosong Yang ◽  
Ren Li ◽  
Yufei Huang
Keyword(s):  
Environmental Impact ◽  
Copper Smelting ◽  
Smelting Process ◽  
Lead Metal ◽  
Secondary Copper Smelting

scholarly journals Brominated dioxin and furan stack gas emissions during different stages of the secondary copper smelting process

2015 ◽  
Vol 6 (3) ◽  
pp. 464-468 ◽  
Author(s):  
Wang Mei ◽  
Liu Guorui ◽  
Jiang Xiaoxu ◽  
Liu Wenbin ◽  
Li Li ◽  
...  
Keyword(s):  
Copper Smelting ◽  
Smelting Process ◽  
Gas Emissions ◽  
Secondary Copper Smelting ◽  
Stack Gas

scholarly journals Effect of Fe/SiO2 Ratio and Fe2O3 on the Viscosity and Slag Structure of Copper-Smelting Slags

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 24
Author(s):  
Baoren Wang ◽  
Hongying Yang ◽  
Zhenan Jin ◽  
Zhijian Liu ◽  
Mingjun Zou
Keyword(s):  
Activation Energy ◽  
Viscous Flow ◽  
Effective Means ◽  
Slag System ◽  
Copper Smelting ◽  
Smelting Process ◽  
Slag Viscosity ◽  
Fe2o3 Content ◽  
Slag Structure ◽  
Secondary Copper Smelting

Secondary copper smelting is an effective means of treating waste resources. During the smelting process, the viscous behavior of the smelting slags is essential for smooth operation. Therefore, the effects of Fe/SiO2 ratio and Fe2O3 contents on the viscous behavior of the FeO−Fe2O3−SiO2−8 wt%CaO−3 wt%MgO−3 wt%Al2O3 slag system were investigated. The slag viscosity and activation energy for viscous flow decrease with increasing Fe/SiO2 from 0.8 to 1.2, and increase as the Fe2O3 content increases from 4 wt% to 16 wt% at Fe/SiO2 ratio of 1.2. However, under the conditions of Fe/SiO2 of 0.8 and 1.0, the viscosity and activation energy for viscous flow show a minimum value at Fe2O3 content of 12 wt%. Fe2O3 exhibits amphoteric properties. In addition, the increase in Fe2O3 content raises the breaking temperature of the slag, while the Fe/SiO2 ratio has the opposite effect. Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy show that increases in Fe/SiO2 ratio lead to simplification of the silicate network structure, while increases in Fe2O3 content improves the formability of the network. This study provides theoretical support for the related research and application of secondary copper smelting.

Experimental study of bottom blown oxygen copper smelting process for water model

2013 ◽  
Author(s):  
Dongxing Wang ◽  
Yan Liu ◽  
Zimu Zhang ◽  
Pin Shao ◽  
Ting'an Zhang
Keyword(s):  
Experimental Study ◽  
Copper Smelting ◽  
Water Model ◽  
Smelting Process

Life Cycle Assessment of Tungsten Production in China

2019 ◽  
Vol 944 ◽  
pp. 1137-1143 ◽  
Author(s):  
Ke Wei Lu ◽  
Xian Zheng Gong ◽  
Bo Xue Sun ◽  
Qing Ding
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Steel Industry ◽  
Smelting Process ◽  
Impact Categories ◽  
Analysis Method ◽  
Total Consumption ◽  
Production Processes ◽  
Annual Total

Tungsten is an important strategic metal, widely used in cemented carbide manufacturing, steel industry, and other economic fields. The amount of tungsten resource consumed in China each year accounts for more than 80% of the world’s annual total consumption. The purpose of this study is to quantify the environmental impact of tungsten production in China through the method of LCA. The result shows that, regarding the contributions of impact categories, the normalized value of HTP is the largest one among various impact categories, which accounts for 35.39% of the total environmental impact, followed by AP, PMFP, GWP, MDP, FDP, and POFP, respectively. The results also show that, regarding the contributions of production processes, smelting process is the largest contributor to the environmental burden of tungsten production due to the crystallization and calcination reduction occurred in the smelting process consumes a large amount of electricity, followed by mining, beneficiation, and transportation, respectively. The major academic contribution of this paper to the existing literatures is that we employed process-based analysis method, which could improve the accuracy of the study and provide practical advices for tungsten enterprises to reduce the environmental impact.

Slag Investigations from Bronze Age Copper Smelting Sites

2017 ◽  
Vol 891 ◽  
pp. 608-612 ◽  
Author(s):  
Roland Haubner ◽  
Susanne Strobl
Keyword(s):  
Phase Diagram ◽  
Chemical Composition ◽  
Phase Diagrams ◽  
Bronze Age ◽  
Equilibrium Phase ◽  
Eastern Alps ◽  
Copper Production ◽  
Copper Smelting ◽  
Smelting Process ◽  
Melting Properties

During the Bronze Age intensive mining and smelting activities for copper production took place in the Eastern Alps. To get information about the copper smelting process, the elemental compositions of slags are marked in equilibrium phase diagrams (e.g. FeO-CaO-SiO2) and so the melting properties can be estimated. Doing so you have to keep in mind that slags have complex compositions and phase diagrams are available for three compounds only. For the analytical measurements it has to be ensured that only molten parts of the slag are measured and not contamination of other ambient material. Spot and area measurements by SEM-EDX are useful to get realistic data. In this case a complete correlation between the image of the analyzed area, the microstructure and the chemical composition of the sample is necessary. For marking spots in the phase diagram the calculation method has to be described exactly. For our results we calculated the ratio FeO-SiO2-CaO(+MgO+Al2O3). From the morphology of the observed phases, their chemical composition and the data from the phase diagram a solidification sequence can be suggested. We recommend this method because measurements by e.g. XRF provide rather general composition values. If the slag samples are inhomogeneous, unrealistic melting points are read from the phase diagram. Inhomogeneities can be caused by soil contaminations, which are not part of the molten slag, or by corrosion, when some phases were attacked and changed during storage in soil.

Online monitoring and assessment of energy efficiency for copper smelting process

2019 ◽  
Vol 26 (8) ◽  
pp. 2149-2159
Author(s):  
Zhuo Chen ◽  
Zhen-yu Zhu ◽  
Xiao-na Wang ◽  
Yan-po Song
Keyword(s):  
Energy Efficiency ◽  
Online Monitoring ◽  
Copper Smelting ◽  
Smelting Process
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