Effect of SiO2 and FeO Content in Iron Ore Powder on Preheating Roasting and Metallurgical Properties of Pellet Ore
In order to understand the effects of different SiO2 and FeO contents of iron ore powder on the compressive strength and metallurgical properties of pellet ore preheating and roasting balls,the effects of SiO2 content of iron ore powder increased from 3.3%to 8.8%and FeO content increased from 7%to 14.6%on the compressive strength and metallurgical properties of pellet ore preheating and roasting balls at 1 020～1 160℃and 1 200～1 280℃are compared.The test results show that increasing the SiO2 content of pellet ore is beneficial to the improvement of the compressive strength of the preheating ball,but when the SiO2 content exceeds 6.8%,the compressive strength of the preheating ball has a downward trend.The com-pressive strength of the roasted pellets tends to increase with the increase of SiO2 content.However,when the SiO2 content exceeds 5.2%,the compressive strength of the roasted pellets tends to decrease.Increasing the FeO content is beneficial to the improvement of the compressive strength of the preheating ball,but there is no obvious change in the compressive strength of the roasting ball.With the increase of SiO2 content in pellet ore,the reduction expansion rate of pellet ore can be improved,but the reduction degree and soft-ening performance have a tendency to deteriorate.
iron ore powderpellet orecompressive strengthmetallurgical properties
NETL
NSTL
万方数据
