AbstractsBiology & Animal Science

"The principle forms of magnesium foundry wastes not recovered by industry are fine dusts, such as, sawdust, rotary filings and grindings, and the melting- and refining-pot drosses. The Bureau of Mines has studied waste generation and has developed processes for the treatment of dresses for the recovery of secondary ingot metal and has also developed processes for the mechanical beneficiation of fine dusts. The studies on fine dusts were continued until suitable melting methods for the recovery of ingot metal, approximately meeting the applicable specifications, were developed...Recommendations are made for improved melting methods for magnesium sawdust that increase greatly the yield on melting. A recommendation that finer dusts, such as, magnesium grindings should be destroyed soon after generation, in accordance with the present magnesium foundry practice, is also made" – Preface, p. v-vi.