Composite Particle For Steel Making and Ore Refining
AssigneeAquaBlok, Ltd.
InventorJohn H. Hull
Life of this patent
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Abstract
Composite particles are used in combination with ore particles in an ore-refining or purification process, such as in a steel- or iron-making process. The composite particles comprise a core, which may be an aggregate of limestone, dolomite, or another ore particle. The core is surrounded by a coating layer of a metal dust and a binder. The metal dust may be iron oxide dust, which, along with limestone, is prevalent in the iron smelting process anyway. In this way, the composite particles help to recycle otherwise wasted and hazardous iron dust. The binder may be mineral clay such as bentonite, montmorillonite or kaolinite, and may comprise about 2-10% by weight of the particle.
Claims18
A composite particle comprising:
- a core comprising an aggregate of limestone, dolomite, or taconite;
- a coating on the core, the coating comprising a metal dust and a binder material.
A method of recycling iron oxide waste dust from a steel- or iron-making operation, the method comprising:
- mixing the iron oxide dust with a mineral clay binder to form a coating;
- applying the coating as a layer on a limestone or dolomite aggregate core to form a composite particle;
- and
- re-smelting the composite particle with ore and coke.
Dependencies are inferred from the claim text.