Open AccessKinetics of the reaction of SiO2 and MnO reduced by C in molten copper with carbon saturated
Author(s) -
Hong-Hong Huang,
Jianbin Chen,
Wen-Bo Pan,
Minghui Zhao
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1681/1/012018
Subject(s) - copper , carbon fibers , graphite , reaction rate constant , reaction rate , metal , chemistry , materials science , kinetics , slag (welding) , inorganic chemistry , metallurgy , catalysis , composite material , organic chemistry , composite number , physics , quantum mechanics
In order to study the effect of matrix metal species on the kinetics of the reaction of Si02 and MnO reduced by C in molten copper with carbon saturated, the experiment, in which a preliminary slag with the composition of 38%CaO-38%SiO 2 -20%Al 2 O 3 -2%MnO-2%MgO that was placed in a graphite crucible and reacted with pure metallic copper at 1450°C under the atmosphere of pure CO, was carried out. The kinetics of both the reactions of Si0 2 and MnO in molten slag reduced by C in molten copper with carbon-saturated (2[C] sat.in Cu + (SiO 2 ) = 2CO(g) + [Si] in Cu and [C] sat.in Cu + (MnO) = CO(g) + [Mn] in Cu ) have been studied by studying the changes of the concentration of Si and Mn in molten copper with carbon-saturated, and the reaction order and reaction rate constant of the two reactions have been obtained. The results show that: (1) The reaction of SiO 2 reduced by C is 0.5th order reaction while it is -0.5th order reaction for MnO; (2) The reaction rate constant of the reduction of SiO 2 reduced by C in molten copper with carbon-saturated is 7.50×l0 −6 mass%0.5·s −1 , while that of MnO reduced by C in molten copper with carbon-saturated is 5.52x10 −6 mass%1.5·s−1; (3) In this study, the reactions of SiO 2 and MnO reduced by C in molten copper with carbon-saturated is a slow reaction and the time for the reaction equilibrium is more than 22 hours.