冶炼商和精炼商将干原料(即铜精矿)加工为阳极铜、以及最终加工为阴极铜收取的费用也令人意外地出现了下降。
There has also been a surprise drop in the fees charged by smelters and refiners to process dry feedstock, or copper concentrate as it is known, into anodes and eventually cathodes.
这种费用的控制方法对冶炼系统具有一定的参考价值。
The expenses controlling methods may be of reference value to equipment maintances of smelt system.
大量的费用研究证明，生产硫酸仍然是从冶炼烟气中回收硫和减少SO 2排放的首选方案。
As demonstrated by many cost studies, the production of sulphuric acid remains the most viable option of sulphur recovery from smelter off-gas and abatement of SO2 emissions to the atmosphere.
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