US 7,731,821 B1 · Reduction of sulfur-containing gases during conversion of coal into metallurgical coke

Abstract

A method of reducing sulfur-containing gases during conversion of a coal slab into metallurgical coke is disclosed. A sulfur-reducing agent is added to a coal slab, which may contain compacted coal aggregate. The coal slab, including the sulfur-reducing agent, is heated to produce metallurgical coke, which results in a reduced amount of sulfur-containing gases relative to an amount of sulfur-containing gases that would be produced by converting the coal slab into metallurgical coke without adding the sulfur-reducing agent to the coal slab before the coal slab is heated. The sulfur-reducing agent may be applied as a coating to the coal slab. The sulfur-reducing agent may include at least one of calcium carbonate, limestone, lime, magnesium carbonate, magnesium oxide, and the like.

Claims10

Dependent claims

A method of reducing sulfur-containing gases during conversion of a coal slab, which includes compacted coal aggregate, into metallurgical coke, the method comprising:

adding a sulfur-reducing agent to the coal slab before the coal slab is heated to convert the coal slab into metallurgical coke, wherein approximately 5% to 100% of the sulfur-reducing agent is calcium carbonate;
and
heating the coal slab and the sulfur-reducing agent to convert the coal slab into metallurgical coke thereby producing a reduced amount of sulfur-containing gases relative to an amount of sulfur-containing gases that would be produced by converting the coal slab into metallurgical coke without adding the sulfur-reducing agent to the coal slab before the coal slab is heated.

Dependencies are inferred from the claim text.

Reduction of sulfur-containing gases during conversion of coal into metallurgical coke

Life of this patent

Reduction of sulfur-containing gases during conversion of coal into metallurgical coke

Life of this patent

Abstract

Claims10