TABLE 53. Data on roasting for tests of electrostatic feed and concentrate. [Materials used: No. 1, mixed flotation concentrate. No. 2, feed to electrostatic separator. No. 3, electrostatic zinc concentrate.] TABLE 54.- Volatilization data for tests of electrostatic feed and concentrate. Lead. Zinc. Copper. Roast No. Percenttilized. Percent Content in heading. Content in calcine. age vola- Content in heading. Content in calcine. age vola- Content in heading. Content in calcine. age vola tilized. Percent tilized. |