题目: 真空度对抽风烧结过程有何影响? 答案: 参考答案:抽风烧结过程是在负压状态下进行的,为了克服料层对气流的阻力,以获得所需的风量,料层下必须保持一定的真空度。在料层透气性和有害漏风一定的情况下,抽风箱内能造成的真空度高,抽过料层的风量就大,对烧结是有利的。所以,为强化烧结过程,都选配较大风量和较高负压风机。
题型:选择题 —Jack, what do you think of the new work?—It's not bad. But the hours are too long.—Oh, _______A.that's really serious.B.how about that job?C.you'll soon get used to it.D.you do it again. 查看答案