发明名称 |
Recovery of tungsten carbide from scrap mining bits |
摘要 |
Tungsten carbide inserts are recovered from scrap mining bits by treatment in a sulphuric acid bath to eat away part of the steel surrounding the inserts and then heating the bit and vibrating the heated bit to knock out the inserts. In a modification used on cross-type bits, heat and vibration alone are used.
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申请公布号 |
US4170513(A) |
申请公布日期 |
1979.10.09 |
申请号 |
US19780913049 |
申请日期 |
1978.06.06 |
申请人 |
PICHE, FERNAND ENTERPRISES LTD |
发明人 |
PICHE, FERNAND J |
分类号 |
C22B7/00;C23F1/02;C23F1/28;(IPC1-7):C23F1/02 |
主分类号 |
C22B7/00 |
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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