本文着重介绍了包钢白云鄂博矿主要杂质元素的赋存状态，包钢现行选矿工艺的降杂效果，并作了简要讨论。
The paper mainly introduces and discusses the existing state of main inclusions element in Baiyun ore, and the inclusions decrease result of the existing ore dressing process at Baotou Steel.
分析了杂质元素铋在银基钎料中的存在状态，以及在钎料的加热过程中铋的相变行为，从而揭示了银基钎料中铋的影响机理。
The existential states of bismuth in silver filler metals is also analyzed. And the continuous course of phase transition is studied. The mechanism of the influence is revealed.
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