SnO2 (ore) is initially washed and dressed. then it is treated with red hot coke/coall(acts as reducing agent) SnO2(s) + C(s)---------> Sn(molten) +CO(g) thus obtained molten Sn is cooled to Pure solid form Solution SnO2 (ore) is initially washed and dressed. then it is treated with red hot coke/coall(acts as reducing agent) SnO2(s) + C(s)---------> Sn(molten) +CO(g) thus obtained molten Sn is cooled to Pure solid form.