Ricardo Luiz Perez Teixeira

Polystyrene and cornstarch anti-corrosive coatings on steel

This work aims to evaluate the performance of anticorrosive thermoplastic coatings in cold rolled steel sheets. Two types of thermoplastic coatings were studied: polystyrene (PS) and cornstarch. These types of coatings are applied for protection against corrosion during transport and storage of steel plates after cold rolling until delivery to stamping or other processing. The good performance for these coatings is suitably standardized to ABNT NBR 5915-2: 2013 and ASTM A1008 / A1008M-2016. According to corrosion tests carried out in saline chamber, the coatings were satisfactory in different degrees of guarantee of corrosion protection on ASTM 1080 steel, in accordance with standards mentioned.

ESTUDO DO REAPROVEITAMENTO DO GÁS DE TOPO DE ALTO‑FORNO A CARVÃO VEGETAL PARA REDUÇÃO DO FENÔMENO DE CREPITAÇÃO EM GRANULADOS DE MINÉRIO DE FERRO

The phenomenon of particle size degradation of minerals due to decreptation is presented as source of fines. In the present work, a study of iron ores decrepitation by employing a system of thermal pretreatment of iron ore was carried out reusing exhaust gases from a mini charcoal blast furnace located in the state of Minas Gerais. The experiments were carried out in two periods of seven days each one, where in the first period the pretreatment system was deactivated and in the second period was activated. The results showed an improvement in the burden permeability by the reduction of the granules decreptation when it was used the thermal pretreatment, reflecting in a increasing of production