从含锗富集物中提炼锗的工艺方法探讨

含锗富 集物用 普通的方 法蒸馏 ,锗的直收 率非常 低,只有３ ０ ％ ～４０ ％ 。我 们经过多 种工艺试验,找到 了一种 提炼锗的 工艺方 法,使锗的 直收率 达到７５ ％ 以上 。     

含锗氧化锌烟尘综合回收锗锌工艺

针对某厂含锗氧化锌烟尘锗含量较高的特性,研究拟定了酸浸一丹宁沉锗－净化－碳铵沉锌的工艺生产锗精矿与碱式碳酸锌产品,经生产验证,此法具有流程短、易操作,收率高,产品质量好等优点,能合理有效地综合回收烟尘中的锗锌等有价金属。     

Activities of oxygen in liquid Bi,Sn, and Ge from electrochemical measurements

Modified coulometric titrations on the galvanic cell: O in liquid Bi, Sn or Ge/ZrO₂( + CaO)/Air, Pt, were performed to determine the oxygen activities in liquid bismuth and tin at 973, 1073 and 1173 and in liquid germanium at 1233 and 1373 K. The standard Gibbs energy of solution of oxygen in liquid bismuth, tin and germanium for 1/2 O₂ (1 atm) →O (1 at. pct) were determined respectively to be ΔG° (in Bi) = −24450 + 3.42T (±200), cal· g-atom⁻¹ = − 102310 + 14.29T (±900), J·g-atom⁻¹, ΔG° (in Sn) = −42140 + 4.90T (±350), cal· g-aton⁻¹ = −176300 + 20.52T (± 1500), J-g-atom⁻¹, ΔG° (inGe) = −42310 + 5.31 7 (±300), cal·g-atom⁻¹ = −177020 + 22.21T(± 1300), J· g-atom⁻¹, where the reference state for dissolved oxygen was an infinitely dilute solution. It was reconfirmed that the modified coulometric titration method proposed previously by two of the present authors produced far more reliable results than those reported by other investigators. TOYOKAZU SANO, formerly a Graduate Student, Osaka University     

锗富集物中硫、砷及二氧化硅的控制

针对高硫、砷二氧化硅等优劣质原料中提取锗的过程中出现的质量问题，进行了除硫、砷及硅的研究。结果表明，采用高温除硫、氧化除砷及二段除硅效果显著，从而确保了锗富集物的质量达标。