Nickel smelting slag melting temperature regulation based on slag transfer and iron lifting
At present,the process of nickel slag iron extraction faces problems,such as low iron extraction efficiency,difficult process implementation and high cost.This paper explored the effects of the main oxide contents in the slag on the hemispheric point temperature by designing single-factor experiments,optimising the slag type using orthogonal tests and carrying out thermodynamic analysis of the melting characteristics of top-blown nickel slag system.The results show that the slag type has the lowest hemispheric point temperature with CaO content of 25％,MgO content of 9％and iron-silion ratio of 0.8.In view of the current process,the preferred solution combines with MgO content of 13％,CaO content of 20％and iron-silion ratio of 1.0,the hemispherical point temperature of the obtained slag is significantly lower than that of the current top-blown slag.After adjustment,the iron phase in the slag is converted from ferrous silicate to calcium herenite and iron oxide,which is better for follow-up iron lifting.
nickel slaghemispheric point temperatureorthogonal testslag type
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