摘要
研究了从铀矿石浸出液中回收铀的化学沉淀法。该法主要包括石灰沉淀铁、氢氧化铁浆体预处理和H2O2沉淀铀。浸出液用石灰乳中和至pH3．7沉淀氢氧化铁，此沉淀物经絮凝和预处理后返回原矿浸出工序，从而省去了氢氧化铁浆体的过滤工序。用H2O2从除铁浸出液中沉淀铀，同时加入MgO浆体，维持pH3．5。研究结果表明：用石灰、H2O2和MgO就能从浸出液中制取钠含量高于65％的过氧化铀产品，并且上述试剂均不污染环境。
A Chemical precipitation process of recovering uranium from the leaching liquor of uranium ore was investigated. The process includes primarily precipitation of iron with lime,preprocessing of the slurry of iron hydroxide and precipitation of uranium with H2O2. The leaching liquor is neutralized by lime milk to pH 3. 7 for precipitating iron hydroxide. The precipitated slurry is recycled to leaching process for recovering uranium in it after being flocculated and preprocessed. It can avoid the filter of the slurry of iron bydroxide. H2O2 is used to precipitate urnaium in the leching liquor free of iron, and the pH of process for uranlum precipitation is adjusted to 3.5 by adding MgO slurry. It is shown in the results that lime,H2O2 and MgO can be used to obtain the uranium peroxide product containing over 65%uranium without environmental pollution.
出处
《铀矿冶》
CAS
1997年第1期6-12,共7页
Uranium Mining and Metallurgy
