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    • 9. 发明授权
    • Process for the production of highly prereduced oxide pellets
    • 生产高分子氧化物颗粒的方法
    • US3642465A
    • 1972-02-15
    • US3642465D
    • 1969-06-16
    • LUMMUS CO
    • SZE MORGAN CBAUER WILLIAM VLONG RAYMOND HBLOOMER WARD JWHITEHEAD RICHARD T
    • C22B1/02C21B13/00C22B1/14C22B1/16C22B1/24C22B1/245C21B1/28
    • C22B1/2406C22B1/2413C22B1/245
    • The present invention discloses a process for producing strong, highly prereduced iron oxide pellets characterized by controlled size and degree of prereduction. Production of such pellets by known processes has failed to achieve economical commercial application. Pelletizing of finely divided ore, carbon, and inexpensive liquid carbonaceous binder is disclosed. The resulting green pellets are heated under conditions leading to coking of the binder and recovery of the cracked vapors which are subsequently fractionated into gaseous fuel and marketable byproduct liquid distillates. The coked pellets are then further heated to achieve the desired degree of reduction. The solid carbon introduced into the pelletizing step is preferably generated from the same liquid carbonaceous binder by spraying same onto hot powder under nonpelletizing conditions.
    • 本发明公开了一种生产强度高,预还原的氧化铁丸的方法,其特征在于其受控尺寸和预还原度。 通过已知方法生产这种颗粒不能实现经济的商业应用。 公开了细碎的矿石,碳和便宜的液体含碳粘合剂的造粒。 所得到的生坯颗粒在导致粘合剂结焦和回收裂化蒸汽的条件下被加热,随后将其分馏成气态燃料和可销售的副产物液体馏出物。 然后将焦化的颗粒进一步加热以达到所需的还原度。 引入造粒步骤的固体碳优选通过在非剥离条件下将粉末喷涂到热粉末上而由相同的液体碳质粘合剂生成。