Experimental investigation of gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu-Fe-O-S-Si system at 1200°C: effect of SO 2 partial pressure
Restricted accessResearch articleFirst published online September, 2022
Experimental investigation of gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu-Fe-O-S-Si system at 1200°C: effect of SO 2 partial pressure
Experimental measurements have been undertaken of the gas-matte-spinel and gas-slag-matte-spinel equilibria in the Cu–Fe–O–S–Si system at 1200°C and
of 0.1 and 0.6 bar. The technique involved high temperature equilibration of sulfide-oxide mixtures on iron spinel support substrates, preservation of the equilibrium phases by rapid quenching, and direct compositional analysis of the phases using microanalysis techniques. The results, combined with previous data obtained at
= 0.25 bar show the effects of sulphur dioxide partial pressure on the gas-matte-spinel and gas-slag-matte-spinel equilibria at fixed temperature and as a function of matte grade. For a given matte grade the concentration of dissolved copper in slag is found to decrease with increasing SO2 partial pressure.
AbdeyazdanH, Fallah-MehrjardiA, HidayatT, ShevchenkoM, HayesPC, JakE.2020. Experimental study of Gas-slag-matte-tridymite equilibria in the Cu-Fe-O-S-Si-Al system at 1573 K (1300 °C) and P(SO2) = 0.25 atm. J of Phase Equilib and Diff. doi:10.1007/s11669-020-00779-4.
CardonaN, MackeyPJ, CoursolP, ParadaR, ParraR.2012. Optimizing Peirce-Smith converters using thermodynamic modelling and plant sampling. JOM. 64(5):546–550.
4.
CusanelliDC, OpieWR, YavorskyM.1979. Smelting lead refinery dross. AMAX Inc., Greenwich p. 4.
5.
Fallah-MehrjardiA, HidayatT, HayesPC, JakE.2017a. Experimental investigation of gas/slag/matte/tridymite equilibria in the Cu-Fe-O-S-Si system in controlled gas atmospheres: development of technique. Metall Mater Trans b. 48(6):3002–3016.
6.
Fallah-MehrjardiA, HidayatT, HayesPC, JakE.2017b. Experimental Investigation of Gas/slag/matte/tridymite equilibria in the Cu-Fe-O-S-Si system in controlled gas atmospheres: experimental results at 1473 K (1200 °C) and P(SO2) = 0.25 atm. Metall Mater Trans b. 48(6):3017–3026.
7.
GeveciA, RosenqvistT.1973. Equilibrium relations between liquid copper, iron-copper matte, and iron silicate slag at 1250°C. Trans Inst Min metall. 82:193–201.
8.
HidayatT, HayesPC, JakE.2018a. Experimental Investigation of Gas/matte/spinel equilibria in the Cu-Fe-O-S system at 1473 K (1200 °C) and P(SO2) = 0.25 atm. J Phase Equilib Diffus. 39(2):138–151.
9.
HidayatT, HayesPC, JakE.2018b. Experimental Investigation of Gas/slag/matte/spinel equilibria in the Cu-Fe-O-S-Si system at 1473 K (1200 °C) and P(SO2) = 0.25 atm. Metall Mater Trans b. 49(4):1750–1765.
10.
HidayatT, ShishinD, DecterovSA, JakE.2015. Thermodynamic reevaluation of the Fe-O system. CALPHAD. 48:131–144.
11.
JakE.2012. Integrated experimental and thermodynamic modelling research methodology for metallurgical slags with examples in the copper production field. Proc. 9th Intl. Conf. on Molten Slags, Fluxes and Salts (MOLTEN12); Beijing, China, Paper w077.
12.
JalkanenH.1981. Copper and sulfur solubilities in silica-saturated iron silicate slags from copper mattes. Scand J Metall. 10(4):177–184.
13.
KaiserDL, ElliottJF.1986. Solubility of oxygen and sulphur in copper-iron mattes. Metall Mater Trans b. 17(3):147–157.
14.
KaiserDL, ElliottJF.1988. Saturation of copper-iron mattes with solid magnetite. Metall Mater Trans b. 19(6):935–941.
15.
LiH, RankinWJ.1994. Thermodynamics and phase relations of the Fe-O-S-SiO2(sat) system at 1200°C and the effect of copper. Metall Mater Trans b. 25(1):79–89.
16.
LuraschiA, ElliottJF.1980. Thermodynamic behavior of oxygen and sulfur in copper-iron-sulfur-oxygen mattes at 1200°C. Trans Inst Min Metall (Section C: Min Proc & Ext Met). 89:14–25.
17.
NagamoriM.1974. Metal loss to slag: part I. sulfidic and oxidic dissolution of copper in fayalite slag from low grade matte. Metall Mater Trans b. 5(3):531–538.
18.
RosenqvistT, HartvigT.1958. The thermodynamics of Fe-Cu mattes, and their equilibrium with magnetite. Norges Tek-Naturvitenskapelige Forskiningsrud Met Kom Meddel. 12:21–52.
19.
ShimpoR, GotoS, OgawaO, AsakuraI.1986. A study on the equilibrium between copper matte and slag. Can Metall Q. 25(2):113–121.
20.
ShishinD, DecterovSA, JakE.2018. Thermodynamic assessment of slag-matte-metal equilibria in the Cu–Fe–O–S–Si system. J Phase Equilib Diff. 39(5):456–475.
21.
ShishinD, HidayatT, Fallah-MehrjardiA, HayesPC, DecterovSA, JakE.2018. Integrated experimental and thermodynamic modelling study of the effects of Al2O3, CaO and MgO on slag–matte equilibria in the Cu–Fe–O–S–Si–(Al, Ca, Mg) system. J Phase Equilib Diff. 1:1–17.
22.
TakedaY.1997a. Copper solubility in matte smelting slag. In: Proc Int Conf Molten slags, Fluxes Salts ‘97, 5th. 1997. Warrendale (PA): Iron and Steel Society; p. 329–339.
23.
TakedaY.1997b. Oxygen potential measurement of iron silicate slag–copper–matte system. In: Proc. 5th int conf molten slags, fluxes salts ‘97. Warrendale (PA): Iron and Steel Society; p. 735–743.
24.
TaveraFJ, BedollaE.1990. Distribution of copper, sulfur, oxygen and minor elements between silica-saturated slag, matte and copper – experimental measurements. Int J Miner Process. 29(3-4):289–309.
25.
YazawaA, NakazawaS, TakedaY.1983. Distribution behaviour of various elements in copper smelting systems, Proceed. of Int. Sulfide Smelting Symposium, San Francisco, USA, 1: 99–117
of 0.1 and 0.6 bar. The technique involved high temperature equilibration of sulfide-oxide mixtures on iron spinel support substrates, preservation of the equilibrium phases by rapid quenching, and direct compositional analysis of the phases using microanalysis techniques. The results, combined with previous data obtained at
= 0.25 bar show the effects of sulphur dioxide partial pressure on the gas-matte-spinel and gas-slag-matte-spinel equilibria at fixed temperature and as a function of matte grade. For a given matte grade the concentration of dissolved copper in slag is found to decrease with increasing SO2 partial pressure.