Resumo

QUINTANA-PUCHOL, Rafael; PERDOMO-GONZALEZ, Lorenzo  e  CRUZ-CRESPO, Amado. Ferroaleación Compleja Obtenida Por Metodos Pirometalurgicos A Partir De Arenas Negras De Cuba. Rev. LatinAm. Met. Mat. [online]. 2003, vol.23, n.2, pp.50-61. ISSN 0255-6952.

These work deals with the chemical and mineralogical characterizations of the black sands of the Mejías placer of Sagua de Tanamo (the most important beach littoral placer of the northwest of oriental Cuba). Starting from these characterizations a calculation strategy is developed for the making of the metallurgical load that allows to obtain simultaneously a multicomponent ferroalloy and a useful slag for the making of electric arch welding consumables, when being processed by carbothermic reduction in an electrical arc furnace with graphite crucible,. The powder of the obtained slag is agglomerated with liquid glass. The resulting pellets, due to their behavior on the submerged arc welding show technological and metallurgical properties that correspond with the requirements of an agglomerated flux matrix. The chemical composition of the multicomponent ferroalloy is constituted by metallic elements of high metallurgical and alloyed values (V, Cr, Mo, Ti, Nb). It is appropriate for the formulation of consumables for manual welding (SMAW) and SAW, as well.

Palavras-chave : Black sands; metallurgy; ferroaleaciones; slag; electrical arc welding.