North American Refractories Company

Harbison-walker Refractories Company

Harbison-walker Reeractories Company

H David Prior

David J Michael

Shyam Miglani

Howard Winkelbauer

Glenn H McIntyre, Iii

Viktor Fischer

Chromia-containing refractory

A magnesia-carbon brick comprised of about 50 to about 95% by weight magnesia and about 1 to about 20% by weight carbon, with or without metallic additions, such that the chemical analysis of the mixture of aggregates used in the brick will comprise, by chemical analysis, about 2 to about 15% SiO, about 3 to about 50% AlO, and about 50 to about 95% MgO.

Refractory brick for steel ladles

A refractory composition comprising at least 50 weight percent chromic oxide (CrO), as measured by chemical analysis. The composition includes fused chromia-containing grain, powdered chromic oxide and sintered chromia-containing grain. The fused chromia-containing grain and the sintered chromia-containing grain comprise at least 50 weight percent chromia oxide, as measured by chemical analysis.

Chromia-alumina refractory

Growing community of inventors

Bethel Park, PA, United States of America

H David Prior