高梯度磁分离技术的进展及其在FCC废催化剂中的应用

The Development of HGMS and Its Application in FCC Waste Catalyst

详述了高梯度磁选技术的最新进展和几种先进的物料提纯及分离磁选工艺 ,并介绍了它们在石油化工、除杂质、生物技术等方面的应用。重点阐述了高梯度磁选的理论基础及其在FCC废催化剂中的应用原理 ,并详尽介绍了其工艺流程。该磁分离方法主要是利用镍、铁等重金属元素在催化剂上沉积量的不同导致它们在磁场中所受的磁力大小不同 ,可从非磁性或弱磁性催化剂颗粒中选出吸附了较多金属的磁性催化剂颗粒。多余 50 % (质量比 )的高磁性催化剂被排弃掉 ,余下 30 % (质量比 )高活性的催化剂返回FCC装置中 ,该技术最终达到充分利用催化剂 ,提高汽、柴油产率 ,节省购买新鲜催化剂资金的目的。并且将为各炼油厂创造巨大的经济效益和社会效益。

Latest development of high gradient magnetic separation (HGMS) and several advanced methods of mass separating and purifying by magnet-select technology, and their applications in mass-elimination, bio-science petrochemical fields are presented. This paper emphasized on the theory basics of HGMS and the principle of its application in waste FCC catalyst separation. There are different content of Ni, Fe deposed on waste catalysts, which make them receive inequivalent force in magnetic field, catalysts with high content are selected from non- or lower magnetic active mass. In general, the high magnetic 50% (wt) are discarded, while the remainder 30% (wt) which has higher active recycled backs to the hydrocarbon conversion unit. High efficiency of catalysts in improvement of gasoline, diesel oil yield are reached, and a lot of money for buying catalysts are saved. This will benefit not only the enterprises but also benefit the society.