Back to results
US 11,530,464 B2Granted
Composite iron pellets and methods of making same
AssigneeSabic Global Technologies B.V.
InventorsMohamed Bahgat Saddik, Hesham Ahmed Hanafy
Life of this patent
Estimating the term…
Abstract
Disclosed herein are methods and compositions for producing composite pellets comprising a core comprising: iron ore and a carbonaceous reducing agent; and a shell comprising: iron ore; and having a core and shell transition in a manner such that no visible boundary exists between the core and the shell in a cross-section of the pellet. The methods can be used to produce composite pellets with improved productivity and quality, and the resulting composite pellets can be used to produce direct reduced iron (DRI).
Claims17
A pellet comprising:
- 25 wt. % to 75 wt. % of a core wherein the core comprises:
- from 93 wt. % to 97 wt. % of an iron ore in the core and from 3 wt. % to 7 wt. % of a carbonaceous reducing agent, based on the total weight of the core;
- 25 wt. % to 75 wt. % of a shell comprising an iron ore in the shell wherein the shell contains from 0 wt. % to less than 3 wt. % the carbonaceous reducing agent based on the total weight of the shell;
- and an intermediate region between the core and the shell;
- wherein the core and the shell transition in a manner such that no clearly distinct boundary exists between the core and the shell in a cross-section of the pellet;
- wherein the iron ore in both the core and the shell comprises at least one member selected from the group consisting of hematite, magnetite, limonite, siderite, iron pyrite and goethite;
- and
- wherein the pellet comprises from greater than 0 wt. % to 3 wt. % silicon oxide.
5 more elements
A pellet comprising:
- 25 wt. % to 75 wt. % of a core wherein the core comprises:
- from 93 wt. % to 97 wt. % of an iron ore and from 3 wt. % to 7 wt. % of a carbonaceous reducing agent, based on the total weight of the core;
- 25 wt. % to 75 wt. % of a shell comprising the iron ore, wherein the shell contains from 0 wt. % to less than 3 wt. % of the carbonaceous reducing agent based on the total weight of the shell;
- an intermediate region between the core and the shell;
- wherein the core and the shell transition in a manner such that no clearly distinct boundary exists between the core and the shell in a cross-section of the pellet;
- wherein the iron ore in both the core and the shell comprises at least one member selected from the group consisting of hematite, magnetite, limonite, siderite, iron pyrite and goethite;
- and
- wherein the shell further comprises a binder comprising at least one member selected from the group consisting of dextrin, bentonite and molasses.
5 more elements
A pellet comprising:
- 25 wt. % to 75 wt. % of a core wherein the core comprises iron oxide and from about 3 wt. % to about 9 wt. % of a carbonaceous reducing agent, based on the total weight of the core;
- 25 wt. % to 75 wt. % of a shell comprising iron ore and from at least some to less than 3 wt. % of the carbonaceous reducing agent based on the total weight of the shell;
- and
- wherein the pellet comprises Fe2O3 in an amount ranging from greater than 88 wt. % to 99 wt. %, based on the total weight of the pellet,
- wherein the pellet further comprises a binder selected from the group consisting of bentonite, molasses and dextrin.
2 more elements
Dependencies are inferred from the claim text.