About Us

U.S. Electrofused Minerals (USEM), a member of the Curimbaba Group, was established in 1982 as the U.S. manufacturing representative for Elfusa and a distributor /manufacturer of loose abrasive grain and powders.

USEM with its sister company Elfusa, is one of the largest producers / distributors of brown and white fused aluminum oxide loose abrasives in the world. Primary markets for our products are the abrasive, refractory, blasting, chemical and nonskid industries. The state of the art ISO 9001 certified Elfusa production facility in Brazil has 28 electric arc furnaces with a capacity of 120,000 metric tons of fused oxides annually. Bauxite mining is provided by Mineracao Curimbaba, ISO 9001 certified, producing over 300,000 tons of bauxite products a year and has over 350 million metric tons in reserve- guaranteeing product availability to our customers for the next several hundred years. This production volume, advanced engineering, quality control, sales and customer satisfaction - enables the price/value of our abrasive and refractory products to be extremely cost effective in more than 30 countries and all world markets.

We specialize in brown, white and pink fused aluminum oxide, black and green silicon carbide, sintered bauxite and activated bauxite. Our raw refractory materials also include fused mullite, magnesia alumina spinel, corundum, calcium aluminate cements, and other fused and sintered materials.