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By Edited by Hongxi Zhu Linjiang Wang

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3 w(CaO)/w(SiO2) (a) NFetO (b) logCk [3] (c) logCs [5] Fig. 1 Relationship between NFetO, logCk, logCs and w(CaO)/w(SiO2) Al2O3 Content From Fig. 2(a), the NFetO decreases significantly with the Al2O3 content increasing at 1773K. 2(b), the logCk increases with the Al2O3 content increasing at 1723K[3]. From Fig. 2(c), the logCs decreases with the Al2O3 content increasing at 1773K[5]. The calculating results are consistent with the former references [3, 5]. Therefore, in order to improve the dealkalization ability, the Al2O3 content should be controlled appropriately.

11 Hongxi Zhu and Linjiang Wang 31 Because the equation set is a higher mode nonlinear equation set, the determination cannot be used for solving the problem directly. Therefore, using Quasi-Newton Method[25] to deal with this higher mode nonlinear equation set by utilizing linearity methods. Turn the equation set into this: f(x)=0 Here x is multivariate variable: x = [ x1 , x2 , , x8 ] = [ N1 , N 2 , N 3 , N 4 , N 5 , N 6 , N 7 , N8 ] T T , f is a column vector which is made up of multi-functions: f ( x ) = [ f1 ( x ), , f8 ( x ) ] T In the equation f1(x) is Eq.

The effects of temperature ( T ), basicity ( B ), the Fe/SiO2 ratio ( mFe / mSiO ), Fe3O4 content ( wFe O ), Cu2O content ( wCu O ), MgO content ( wMgO ) and CaO content ( wCaO ) on the slag surface tension ( σ ) were also studied. 87% and the temperature range of 1380°C to 1500°C. To make the freeze slag adhere to the reaction shaft inner wall easily, the Fe3O4 content in freeze slag should be increased and the inner chamber temperature of reaction shaft should be controlled appropriately. 2 3 4 2 2 3 4 2 2 3 4 2 Introduction Since its appearance in 1949, Outokumpu flash smelting technology has making continuous innovation and has become the most competitive intensified smelting technology [1,2], widely considered to be the standard clean smelting process [3].

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