发明名称 |
METHOD OF TREATING MATERIALS CONTAINING URANIUM AND THORIUM RADIONUCLIDES |
摘要 |
FIELD: radiation protection. SUBSTANCE: invention focuses on removing radionuclides from placer platinum containing precious metals and uranium and thorium radionuclides. To that end, polluted placer platinum is oxidatively fired in air atmosphere at 1473-1773K for 0.50-0.66 h. Condensed uranium and thorium oxides are separated and radionuclide-depleted solid residue is melted in air in presence of flux, namely, <EMI ID=0.118 HE=6 WI=15 TI=CHI> taken in ratio from 1:10 to 1:12 relative to weight of original material. Melt is heated to 2123-2173K, kept isothermally in air atmosphere at attained temperature for 0.33-0.50 h, and freed of slag. EFFECT: increased extent and selectivity of recovery of uranium and thorium. 1 tblo
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申请公布号 |
RU2122250(C1) |
申请公布日期 |
1998.11.20 |
申请号 |
RU19940041038 |
申请日期 |
1994.11.15 |
申请人 |
TOVARISHCHESTVO S OGRANICHENNOJ OTVETSTVENNOST'JU;INNOVATSIONNO T TS EHLLOJ |
发明人 |
ERMAKOV A.V.;DMITRIEV V.A.;PIROGOV S.M.;BOGDANOV V.I.;TIMOFEEV N.I.;KALINOVSKIJ A.A.;KONJAEV A.N.;SUSLOV A.P.;FETISOV V.I. |
分类号 |
G21F9/30;(IPC1-7):G21F9/30 |
主分类号 |
G21F9/30 |
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