排序方式: 共有4条查询结果,搜索用时 62 毫秒
1
1.
2.
The influence of gravity on the reaction engineering of tubular reactor is studied by analyzing the residence time distribution curves.The results show that upflow-feeding mode is more beneficial compared with downflow-feeding mode,since the flow pattern of the fluid in the reactor is closer to plug flow.The result of dynamic experiment conducted in ion-exchange of tungsten metallurgy is as good as that in reaction engineering of ion-exchange column.Whether downflow-feeding or upflow-feeding mode is adopted,breakthrough time decreases when solution concentration increases.Upflow-feeding mode has longer breakthrough time and greater improvement in adsorption capacity especially with high WO3 concentration in ion-exchange. 相似文献
3.
4.
针对钨钼冶炼过程中钒难以深度除去的难题,借鉴海洋化学研究中的元素迁移规律,研究采用高价水合氧化物从钨钼冶炼过程中除钒。结果表明:从钨酸钠溶液中除钒,当铁盐添加量按Fe与V摩尔比为40、溶液pH值为8.5~9.0时,除钒率均能达到99%以上。而在相同条件下,当采用水合铝氧化物和锰氧化物作为除钒剂时,除钒率分别只能达到90%和60%,除钒效果明显不及采用铁盐时的。另外,用于在钼酸钠溶液除钒,当铁盐添加量按Fe与V摩尔比为40、溶液pH值7.5~10.8时,除钒率可达到97%,钼损失率小于5%。而在钼酸铵溶液中,当铁盐添加量按Fe与V摩尔比为10、溶液pH为8.6~9.0时,除钒率在96%以上,同时几乎没有钼损失;当铁盐添加量按Fe与V摩尔比增加到20时,除钒率均高于97%,钼损失率也小于2%。在钨钼冶炼过程中,铁盐可以作为一种有效的除钒试剂。 相似文献
1