<研究>砒〓焙焼に關する基礎的研究(第1報)

概要

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Some fun lamental experiments on the removal of arsenic from the speiss resulting from lead smelting were carried out. The composition of the speiss was Ni 32.6 Co 6.4,Cu 11.0,S 4.0,Fe 1.4,Pb 1.5,and As 40.0%. The results of the oxidizing roasting by air are reported in this paper. The change in weight of the speiss heated slowly in air was measured with a thermo-balance, and it was found that a preliminary roasting at lower temperature was unnecessary. Therefore experiments were carried out at constant temperature. The optimum roasting condition was as follows : Grain size of the charge -200 mesh ; temperature 750℃ ; blast amount 1.37 liter/hour/g. of charge ; time 60 min. It was found that only about 50% (apparent value) of arsenic in the original speiss could be removed under the above condition by one operation and the repetition of operations was without any effect.
東北大学の論文
1949-03-30