发明名称 |
METHOD FOR SEPARATING AND RECOVERING LEAD, TIN AND NICKEL FROM SOLDER-CONTAINING NICKEL ALLOY |
摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to separate and recover an Ni-Si-Fe based alloy and metallic Sn by adding ferrosilicon to a solder-contg. nickel alloy in an inert atmosphere and melting this alloy in a specific temp. range. SOLUTION: The ferrosilicon is added as an Si source to the solder-contg. nickel alloy and the mixture is sufficiently mixed and is charged into a graphite crucible. This graphite crucible is heated in a temp. range of >=1400 to <=1600 deg.C under the inert atmosphere by gaseous N2 in a high-frequency induction heating furnace to melt the mixture. At this time, the Si grade in the Ni-Si-Fe based alloy is preferably controlled to 25 to 35 wt.% or the Si/Sn weight ratio to 1.1 to 1.4. The solder-contg. nickel alloy and the ferrosilicon are brought into sufficient reaction and the reaction product is held at a prescribed temp. and is then subjected to phase sepn. by cooling down to room temp. As a result, the Ni-Si; Fe based alloy of about 5% Sn is obtd. and the metal Sn may be recovered by elution.</p> |
申请公布号 |
JPH11106845(A) |
申请公布日期 |
1999.04.20 |
申请号 |
JP19970275697 |
申请日期 |
1997.10.08 |
申请人 |
SUMITOMO METAL MINING CO LTD |
发明人 |
TSUGITA YASUHIRO;FUJITA KEIJI |
分类号 |
B09B3/00;C22B7/00;C22B13/02;C22B23/02;C22B25/06;(IPC1-7):C22B25/06 |
主分类号 |
B09B3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|