Minimization of copper losses to slag in matte smelting by colemanite addition

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 matte smelting slag were not taken into account by using a synthetic slag and a matte. Therefore, a slag consisting of FeO-Fe2O3-SiO2 and a matte with Cu-Fe-S were only used. After producing synthetically a slag without copper and a matte, they were melted together at 1250 degrees C under nitrogen atmosphere in silica crucibles. During these experiments, calcined colemanite addition in various amounts (0%, 2%, 4% and 6% of charge), and duration (0.5, 1, 2, 4 h) were chosen as variables. At the end of experiments, the results showed that when the calcined colemanite addition to synthetic slag-matte couple was increased from 0% to 6%, the copper content in resultant slag decreased substantially from about 1.50% to about 0.40%. It was also seen that the addition of calcined colemanite reduced the duration to reach equilibrium. By applying this method, the quality of production process could be improved as well as reducing the cost of processing of slag.


Investigation of effect of colemanite addition on copper losses in matte smelting slag
Rusen, A.; Geveci, Ahmet; Topkaya, Yavuz Ali; Derin, B. (2012-04-01)
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...
Usage of boron compounds in copper production
Rüşen, Aydın; Geveci, Ahmet; Topkaya, Yavuz Ali; Department of Metallurgical and Materials Engineering (2013)
Copper losses to slag are generally between 0.7-2.3% during the copper matte smelting stage. In this study, the aim was to reduce these losses in the slag phase. For this purpose, usage of some additives (especially calcined colemanite labeled as CC, boric oxide-B2O3 and calcium oxide-CaO as well) as flux material was investigated. The flash furnace matte-slag (FFM-FFS) obtained from Eti Copper Inc. and a master matte-slag (MM-MS) produced synthetically were used as starting materials. Additives were tested...
Use of boron waste as an additive in red bricks
Uslu, T; Arol, Ali İhsan (Elsevier BV, 2004-01-01)
In boron mining and processing operations, large amounts of clay containing tailings have to be discarded. Being rich in boron, the tailings do not only cause economical loss but also pose serious environmental problems. Large areas have to be allocated for waste disposal. In order to alleviate this problem, the possibility of using clayey tailings from a borax concentrator in red brick manufacturing was investigated. Up to 30% by weight tailings addition was found to improve the brick quality.
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...
Laboratory-scale smelting of limonitic laterite ore from Central Anatolia
Pournaderi, S.; KESKİNKILIÇ, ENDER; Geveci, Ahmet; Topkaya, Yavuz Ali (2017-07-01)
The feasibility of ferronickel production from a low-grade limonitic laterite ore was investigated. The ore was first calcined and then prereduced in the solid state. The reduced ore was then smelted to produce ferronickel. The effects of coal addition, smelting temperature, and retention time on the process were investigated. Chemical and physical losses in the slag were separately quantified. Coal addition was the main parameter that controlled the ferronickel grade and losses in the slag. The melting poi...
Citation Formats
A. Rusen, A. Geveci, and Y. A. Topkaya, “Minimization of copper losses to slag in matte smelting by colemanite addition,” SOLID STATE SCIENCES, pp. 1702–1704, 2012, Accessed: 00, 2020. [Online]. Available: