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from the Curimbaba GroupYour Best Source for Industrial Minerals

About Usem

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 industrial minerals.

USEM with its sister company Elfusa, is one of the largest producers / distributors of brown and white fused aluminum oxides in the world. Primary markets for our products are the abrasive, refractory, blasting, chemical and nonskid industries. Our sister company in Brazil, Elfusa Geral de Eletrofusão Ltda, has 28 electric arc furnaces with a capacity of 120,000 metric tons of fused oxides annually. Bauxite raw material is provided by Mineração Curimbaba, ISO 9001 certified, producing over 300,000 tons of several industrial minerals per year and has over 350 million metric tons in reserve, guaranteeing product availability for several decades. The production capability, advanced engineering, quality control, R&D and pristine customer service are value added tools recognized for all the customers worldwide.

We specialize in brown, white and pink fused aluminum oxides, black and green silicon carbides, sintered and activated bauxites. Our portfolio of industrial minerals includes fused mullite, magnesia alumina spinel, calcium aluminate cements, and other fused and sintered materials.

From the coarsest grits to the finest powders, we show high adherence to ANSI, FEPA, ISO, JIS, and customer specific standards.

We are proud to offer products produced by our sister companies: Elfusa, Sublime Technologies, Mineração Curimbaba which are ISO 9001 Certified.

See about our certifications

Since 1982, USEM and Elfusa are one of the largest producers and distributors of brown and white fused aluminum oxides in the world.