Experiment was discovered: the impurity of the alloy billet produced by direct resistance sintering was lower, than by activated sintering and medium-frequency inductionsintering.
试验发现：垂熔烧结可获得较低杂质含量的合金坯料，活化烧结和中频感应烧结获得的坯料杂质含量较高。
2
There are three respects of contrast between high alumina and silica sand in using for induction furnace Lining. They are the sintering technology, the using effect and the synthetic economic results.