LEAD REFINING BY FRACTIONAL CRYSTALLIZATI ON WITH THE CRYSTALLISATOR

The quality and quantity of metal lead must be improved. But under the pressure of drop in price, stringent environmental policy and threats of energy crisis lead industry has been confronted with numerous diff iculties since many years. For lead industry there are ways to turn a misfortune into a blessing. As a example, we undercook an investigatio n of lead refining by fractional crystallisation with the crystallisat or. The experimental results showed that metal lead can be refined by Fractional crystallisation with the crystallisator. Ag and Cu could be removed more than 95 % and 90 %, and Bi about 60 % under the followin g experimental conditions: angle of 6 degrees and revolution of 1.36 r .p.m.. Therefore lead refining by fractional crystallisation with the cristallisator is of significance.