| 发明名称 |
NICKEL POWDER DESULFURISATION |
| 摘要 |
<p>A process and apparatus for desulfurisation of nickel powder is disclosed in which the nickel powder is heated in a hydrogen-containing atmosphere to promote the formation of hydrogen sulfide gas. The hydrogen sulfide gas is then removed using a desulfurisation agent. Hydrogen gas is used as a transfer agent to transport the sulfur from the nickel powder to a suitable desulfurisation agent. In this way the sulfur content of the nickel powder can be substantially reduced. The apparatus (30) includes a rotary kiln (32) in which the off-gases are recycled back into the kiln via an adsorbent H>2<S filter (34). The nickel powder is fed to the rotary kiln (32) via a nickel powder feed hopper (35) which pre-heats the powder prior to entry into the kiln. The kiln is indirectly heated using natural gas. A gas blower (36) maintains a flow of hydrogen containing gas through the rotary kiln in a counter-current direction relative to the direction of transport of the nickel powder through the kiln. Filter (34) incorporates a filter membrane made from a suitable non-volatile desulfurising agent such as calcium, magnesium metal or calcium hydroxide which can be periodically replaced as required. The desulfurised nickel powder exits from the rotary kiln (32) via a discharge hopper (42) where some cooling of the nickel powder occurs. From there the desulfurised nickel powder is fed to a hot briquetting machine (44) which presses the powder into small briquettes. A significant improvement in the production of on specification nickel briquettes can be achieved.</p> |
| 申请公布号 |
EP1235942(A4) |
申请公布日期 |
2003.05.02 |
| 申请号 |
EP20000972449 |
申请日期 |
2000.10.27 |
| 申请人 |
WMC RESOURCES LTD |
发明人 |
LALLENEC, SERGE;PICKERING, GARETH;CLARK, IAN;FRENCH, SEAMUS |
| 分类号 |
C22B9/14;B22F1/00;C22B1/24;C22B5/12;C22B9/16;C22B23/06;(IPC1-7):C22B23/06;C22B1/11;B22F9/16;C22B9/05 |
主分类号 |
C22B9/14 |
| 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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