scholarly journals Recirculation of Chilean Copper Smelting Dust with High Arsenic Content to the Smelting Process

2008 ◽  
Vol 49 (9) ◽  
pp. 2112-2118 ◽  
Author(s):  
Victor Montenegro ◽  
Hiroyuki Sano ◽  
Toshiharu Fujisawa
Keyword(s):  
Copper Smelting ◽  
Smelting Process ◽  
Arsenic Content ◽  
Chilean Copper ◽  
Smelting Dust ◽  
High Arsenic

Recirculation of high arsenic content copper smelting dust to smelting and converting processes

2013 ◽  
Vol 49 ◽  
pp. 184-189 ◽  
Author(s):  
Victor Montenegro ◽  
Hiroyuki Sano ◽  
Toshiharu Fujisawa
Keyword(s):  
Copper Smelting ◽  
Arsenic Content ◽  
Smelting Dust ◽  
High Arsenic

scholarly journals Effect of Metal Oxides and Smelting Dust on SO2 Conversion to SO3

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 734
Author(s):  
Haipeng Liu ◽  
Qin Zhang ◽  
Hongying Yang ◽  
Yanan Wu ◽  
Jiacheng Chen ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Catalytic Oxidation ◽  
Conversion Rate ◽  
Copper Smelting ◽  
Smelting Process ◽  
Zinc Smelting ◽  
Lead Smelting ◽  
Lead Zinc ◽  
Smelting Dust ◽  
Copper Lead

The purpose of this study was to investigate the effects of metal oxides and smelting dust on the formation of sulfur trioxide during copper, lead, zinc smelting process and flue. Focusing on the effects of SO2 concentration, O2 concentration, and temperature on SO2 oxidation conversion rate under homogeneous test conditions, and under various metal oxide oxidation conditions, further in dust (mainly electric dust removal ash in copper, lead, zinc smelting process), which were studied by single factor experiment test. The results showed that the effect of heterogeneous catalytic oxidation on SO2 conversion rate is much greater than that of pure gas phase oxidation. The addition of five pure metal oxides such as Fe2O3, CuO, Al2O3, ZnO, and CaO obviously promoted the SO2 conversion rate under different conditions. At different temperatures, the ability of metal oxides to promote SO2 conversion is ranked: Fe2O3 > CuO > CaO > ZnO > Al2O3. The catalytic oxidation of copper, lead, and zinc smelting dust to SO2 conversion rate was studied, and the conclusion was drawn that the metal oxides that promoted SO2 conversion rate in copper smelting dust were Fe2O3, Al2O3, ZnO, CaO, and the main substance was Fe2O3; the metal oxides that promoted SO2 conversion in zinc smelting dust were Fe2O3, Al2O3, ZnO, CaO, CuO, and the main substances were Fe2O3 and ZnO; the metal oxides that promoted SO2 conversion rate in lead smelting dust were Fe2O3. Whether metal oxides or copper, zinc, lead smelting dust in the experiment, Fe2O3 displayed the strongest catalytic oxidation capacity.

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

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

Arsenic removal from highly-acidic wastewater with high arsenic content by copper-chloride synergistic reduction

Chemosphere ◽  
2020 ◽  
Vol 238 ◽  
pp. 124675 ◽  
Author(s):  
An Wang ◽  
Kanggen Zhou ◽  
Xuekai Zhang ◽  
Dingcan Zhou ◽  
Changhong Peng ◽  
...  
Keyword(s):  
Arsenic Removal ◽  
Copper Chloride ◽  
Arsenic Content ◽  
Acidic Wastewater ◽  
High Arsenic

An effective separation process of arsenic, lead, and zinc from high arsenic-containing copper smelting ashes by alkali leaching followed by sulfide precipitation

2020 ◽  
Vol 38 (11) ◽  
pp. 1214-1221
Author(s):  
Yuhui Zhang ◽  
Xiaoyan Feng ◽  
Bingjie Jin
Keyword(s):  
Separation Efficiency ◽  
Separation Process ◽  
Copper Smelting ◽  
Solid Ratio ◽  
Effective Separation ◽  
Lead And Zinc ◽  
Valuable Metals ◽  
Alkali Leaching ◽  
Sulfide Precipitation ◽  
High Arsenic

Separation of arsenic and valuable metals (Pb, Zn, Cu, Bi, Sn, In, Ag, Sb, etc.) is a core problem for effective utilization of high arsenic-containing copper smelting ashes (HACSA). This study developed an effective separation process of arsenic, lead, and zinc from HACSA via alkali leaching followed by sulfide precipitation. The separation behaviors and optimum conditions for alkali leaching of arsenic and sulfide precipitation of lead and zinc were established respectively as follows: NaOH concentration 3.81 M; temperature 80°C; time 90 minutes; liquid-to-solid ratio 4:1; agitation speed 450 revolutions/minute (r/min) and 2.0 times of theoretical quantity of sodium sulfide (Na2S); temperature 70°C; and time 60 minutes. The results indicated that the leaching rates of As, Pb, and Zn were 92.4%, 36.9% and 13.4%, respectively. More than 99% of lead and zinc were precipitated from the alkali leachate. The scanning electron microscopy/energy dispersive X-ray spectroscopy study confirmed that arsenic was dissolved from HACSA into the alkali leachate. Furthermore, lead and zinc were precipitated as sulfides from the alkali leachate. The proposed process was a good technique for separation of arsenic and enrichment of valuable metals for further centralized treatment separately. It provided high separation efficiency of arsenic and valuable metals, as well as low environmental pollution.

Sign in / Sign up

Export Citation Format

Share Document