Investigation of effect of colemanite addition on copper losses in matte smelting slag

Rusen, A.
Geveci, Ahmet
Topkaya, Yavuz Ali
Derin, B.
In this study, the aim was to reduce copper losses to slag in copper production by using a boron compound, called colemanite (2CaO center dot 3B(2)O(3)center dot 5H(2)O), as flux, besides silica. In order to achieve this purpose, two different matte-slag couples were used; the flash furnace matte-slag obtained from Eti Copper Inc. (EBI.) and a master matte-slag without copper produced synthetically under laboratory conditions. Chemical analyses of flash furnace slag and synthetic master slag were 0.88%Cu-36.1%SiO2-43.9%FeO-3.7%Fe2O3 and 37.6%SiO2-60.0%FeO-2.4%Fe2O3 respectively. In each experiment, the same amounts of slag and matte were mixed with the addition of predefined amounts of colemanite and melted together at 1250 degrees C for different durations under nitrogen atmosphere in a silica crucible. Results showed that it was possible to decrease the copper losses to about 0.3-0.4% by accelerating the settling rate of matte particles by the addition of colemanite, which was attained by the expected increase in flash furnace slag fluidity and lowering of its liquidus temperature.


Minimization of copper losses to slag in matte smelting by colemanite addition
Rusen, Aydin; Geveci, Ahmet; Topkaya, Yavuz Ali (2012-11-01)
In any copper production plant, more than two tons of slag is discarded with 0.7-2.3%Cu to produce each ton of copper. Therefore, minimizing copper losses is crucial during the copper matte smelting. In order to reduce the copper losses to slag in copper production, the addition of colemanite (a boron compound; 2CaO.3B(2)O(3).5H(2)O) to slag was investigated in the present study. In experiments, the effects of other oxides such as ZnO, PbO, CaO and Al2O3 which are generally known to be present in copper mat...
Investigation of cell migration and proliferation in agarose based hydrogels for tissue engineering applications
Vardar, Elif; Hasırcı, Nesrin; Hasırcı, Vasıf Nejat; Department of Biomedical Engineering (2010)
Hydrogels are three dimensional, insoluble, porous and crosslinked polymer networks. Due to their high water content, they have great resemblance to natural tissues, and therefore, demonstrate high biocompatibility. The porous structure provides an aqueous environment for the cells and also allows influx of nutrients needed for cellular viability. In this study, a natural biodegradable material, agarose (Aga), was used and semi-interpenetrating networks (semi-IPN) were prepared with polymers having differen...
Recovery of copper from oxide copper ore by flotation and leaching
Kiraz, Emirhan; Atalay, Mustafa Ümit; Department of Mining Engineering (2014)
The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H2SO4) leaching. The ore with 4.21% copper grade used in this study was obtained from Çorum-Dangaz region of Turkey. Native copper, cuprite (Cu2O), tenorite (CuO), and malachite (Cu2(OH)2/CO3) were the main copper minerals in the test sample. Quartz, calcite, illite, chlorite, and plagioclase were determined as the main gangue minerals of the sample. The mesh of grind size of copper mi...
Theoretical and experimental investigation of water-gas shift reaction over supported copper/iron oxide catalysts
Yalçın, Özgen; Önal, Işık; Department of Chemical Engineering (2017)
Density functional theory calculations were carried out to investigate the role of the chromium and copper, which were demonstrated to act as textural and catalytic promoters, respectively, for the Fe3O4-Cr2O3-CuO catalyst system by in situ experimental studies at the atomic scale. There is a minor effect of Cr on the dissociative adsorption of H2O, but no effect on CO adsorption on the Feoct2 termination of Fe3O4 (111) surface indicating that Cr does not act as a chemical promoter. Copper promotion of the ...
Investigation of the effect of orientation and heat treatment on the stress corrosion cracking susceptibility of 7050 aluminium alloy
Çevik, Gül; Doruk, Mustafa; Department of Metallurgical and Materials Engineering (2004)
In the present work, the effect of variation in specimen orientation and heat treatment on the Stress Corrosion Cracking (SCC) susceptibility of 7050 aluminum alloy was investigated in 3,5% NaCl solution and under freely corroding conditions. For this purpose, Constant Extension Rate Tests (CERT) was performed on precracked Compact Tension (CT) specimens and the Direct Current Potential Drop technique was applied to measure the crack lengths. In addition to crack length versus time curves, the relationship ...
Citation Formats
A. Rusen, A. Geveci, Y. A. Topkaya, and B. Derin, “Investigation of effect of colemanite addition on copper losses in matte smelting slag,” CANADIAN METALLURGICAL QUARTERLY, pp. 157–169, 2012, Accessed: 00, 2020. [Online]. Available: