结果表明，现有工艺流程能较好地回收镍、铜、钴等金属，而贵金属的回收水平有待提高。
The results show that the existing technological flowsheet can well recover nickel, copper and cobalt while the precious metal recovery level remains to be improved.
对于贵金属催化剂，应大力开发与贵金属复合的多元催化剂，提高贵金属利用率，降低贵金属负载量。
For precious metal catalyst, composite catalyst based on precious metal should be developed. The utilization rate of…
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