从非枝晶坯料的制备、坯料的重熔加热和半固态的成形工艺等三方面介绍镁合金半固态成形的研究现状。
The present status of the research of Mg alloy semi-solid processing from three aspects including the preparation of non-dendritic structure, reheating and semi-solid processing were described.
用蒸汽在机械化澄清槽底部间接加热，使沉积于底部的重质焦油软化，减少刮板阻力。
Apply steam to heat the flushing-liquor decanter indirectly to soften the heavy tar depositing on the bottom of tank to decrease the drag of chain scraper.
装置内无适宜的中低温位热源者，则不宜采用重沸器加热汽提。
For units without proper moderate or low level heat source, it is inadequate to adopt reboiler for heating and stripping.
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