Cyclone of a regenerating system in a catalytic cracking unit in the Changling Oil Refining Plantcan not be protected by using conventional linner of alumina because of its small size.

长岭炼油厂新型催化裂化装置再生系统旋风分离器尺寸小，不能采用常规氧化铝内衬保护。

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Alcoa is the world leader in the production and management of primary aluminum, fabricated aluminum, and alumina combined, through its active and growing participation in all major aspects of the industry: technology, mining, refining, smelting, fabricating, and recycling.

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