1996 Volume 82 Issue 10 Pages 811-816
To use pisolite ores as raw materials in iron ore sintering process, some effective utilization methods were investigated. Main results obtained are summarized as follows:
(1) With increase in the pisolite ores in the raw materials, productivity and yields of the sinter products become worse; on the other hand reducibility and reduction degradation index of the products are improved.
(2) For the purpose of improving the properties of the sinter products, it is most favorable to make quasi-particles having duplex structures; inner core is granulated by the raw mixture containing the pisolite ores and outer shell is coated with fine coke and high grade iron are fines.
(3) In addition to the making of quasi-particles with the duplex structure, segregation charge of the coke breeze in the sintering bed further improves the productivity and shatter strength of the products.
(4) Improved properties of the products, such as reducibility and reduction degradation are attributed mainly to the sinter structures and mineral phases constituting the microstructures.