Methods and compositions for decreasing adherence of iron oxide pellets used in direct reduction processes
AssigneeSaudi Basic Industries Corporation
InventorsMohamed Bahgat Saddik, Syed Niaz Ahsan
Life of this patent
Estimating the term…
Abstract
Disclosed herein are methods and compositions for producing coated iron oxide pellets comprising an outer coating comprising cement exhibiting a reduced sticking index while retaining a high level of metallization following reduction. The improved coated iron oxide pellets can be used to produce direct reduced iron (DRI) with improved productivity.
Claims14
A direct reduction process using a vertical furnace, the process comprising:
- (a) providing a cement mixture comprising from about 12 wt % to about 20 wt % cement;
- (b) applying the cement mixture to iron oxide pellets to provide a coated iron oxide pellet;
- (c) introducing the coated iron oxide pellet to a vertical furnace;
- and
- (d) reducing the coated iron oxide pellet;
- wherein the sticking index of the coated iron oxide pellet is less than or equal to about 5%;
- and
- wherein the metallization of the iron oxide pellet after reduction in the vertical furnace is at least about 92%.
A composition to decrease sticking of direct reduction iron oxide pellets, the composition comprising an iron oxide pellet and a cement mixture comprising from about 12 wt % to about 20 wt % cement.
Dependencies are inferred from the claim text.