For example, limestone and dolomite, which are auxiliary raw materials containing CaO and MgC, are blended according to the iron grade of the iron ore (pellet feed) serving as an iron material so that the CaO/SiO* mass ratio is adjusted to 0,8 or more (preferably 1,0 or more, more preferably 1,2 or more, and particularly preferably 1,4 or more), the MgC/Si02 mass ratio is adjusted to 0,4 or more (preferably 0,5 or more, more preferably 0,5 or more, and particularly preferably 0,7 or more}, and the temperature Ts at which the pressure loss starts to increase sharply as defined by equation (3.) above is adjusted to 12,0®C or more (preferably 13,0°C or more, more preferably 13,0°C or more, and particularly preferably 13,0°C or more).
It was also found that the kinetic study using the combined methods Jump- FSIA applies in the direct reduction of iron ore pellets by H2 and H2+CO. In shaped pellets from pellet feed with higher specific surface area (more active), both the kinetics as the rate of reduction indicated that the addition of CO to the reducing gas has no effect on the reduction process.
Foi constatado também que o estudo cinético através dos métodos combinados Jump-FSIA é aplicável na redução direta de pelotas de minério de ferro por H2 e H2+CO. Nas pelotas conformadas a partir de pellet feed com maior área de superfície específica (mais ativas), tanto a cinética quanto a taxa de redução indicaram que a adição de CO ao gás redutor não influi no processo de redução.
Originally designed for sinter feed grinding, the Carajas grinding circuit includes two ball mills in parallel lines in a closed configuration with cyclones.
O circuito de moagem de Carajás foi originalmente projetado para moagem de sinter feed, obtendose como produto final pellet feed.
Inglês
Português
Resultados da busca para 
