在减压渣油中掺兑乙烯重焦油，有望成为扩大乙烯重焦油利用的一种途径。

So, processing mixture of vacuum residue and ethylene heavy tar is expected to be a better route for expanding ethylene heavy tar use.

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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.

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润滑性较差的介质，如轻质燃油、重质燃油、煤焦油、沥青、粘胶液、乳化液等；

Medium with worse lubricating property, such as light fuel oil, heavy fuel oil, coal tar, asphalt, viscose, emulsified mixture, etc.

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