Effect of Ludwigite on Pellet Preparation and Metallurgical Properties

Ludwigite is a multi-element coexisting iron ore. By changing the amount of ludwigite added during the preparation of pellets, the effect of ludwigite on the metallurgical properties of pellets was studied, including compressive strength, reduction swelling rate, and metallurgical properties. The effect of ludwigite addition on the softening-melting droplet properties of pellets was studied, and an appropriate amount of addition was obtained, providing theoretical guidance for practical production. The research results indicate that when the ludwigite addition is 12%, the compressive strength of the pellets reaches the maximum value of 3285 N. The increase in B2O3 content is beneficial for improving the compressive strength of the pellets; when the ratio of ludwigite is 15%, the reduction expansion of the pellets reaches the minimum value of 5.1%. The increase in B2O3 content is beneficial for reducing the reduction expansion of the pellets; the proportion of ludwigite can be appropriately increased in the pellet. Under the condition of not exceeding 6%, the softening-melting droplet property of the pellet does not change much, but after exceeding 6%, the softening-melting droplet property tends to deteriorate.