发明名称 |
METHOD OF PREPARING COAL-COMBUSTION FLY ASH FOR UTILIZATION IN MANUFACTURE OF BUILDING MATERIALS |
摘要 |
<p>FIELD: waste reclamation. SUBSTANCE: fly ash from coal combustion is treated with sulfuric acid concentrated to 50 to 300 g/l at ash weight to solution volume ratio 1:(4- 10) and temperature 18-90 C. To intensify leaching process, acid solution is supplemented by sodium chloride additive to chloride ion concentration 0.5 to 25.0 g/l. Process is carried out for 1 to 6 hr at 40-90 C. In heap leaching process, acid solution with temperature 18-40 C is passed through ash bed by gravity. In this process, sulfuric acid concentration is 50 to 200 g/l and ash weight to solution volume ratio is 1: (5-6). EFFECT: enhanced process efficiency. 5 cl, 2 tbl, 4 ex</p> |
申请公布号 |
RU2138339(C1) |
申请公布日期 |
1999.09.27 |
申请号 |
RU19980107053 |
申请日期 |
1998.04.06 |
申请人 |
OMSKIJ GOSUDARSTVENNYJ UNIVERSITET |
发明人 |
BORBAT V.F.;ADEEVA L.N.;NECHAEVA O.A.;MIKHAJLOV JU.L. |
分类号 |
B03B9/06;C04B7/28;C04B18/10;(IPC1-7):B03B9/06 |
主分类号 |
B03B9/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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