Method for preparing high titania type high MgO sintering ore

Abstract

The invention belongs to the field of metallurgy of iron and steel, particularly relates to a method for preparing high titania type high MgO sintering ore, aiming to provide a method capable of improving the drum strength of high sintering ore. The method comprises the steps of dosing, mixing material for pellet fabrication, distributing material, igniting and sintering. The high titania type high MgO sinter ore comprises the following ingredients by weight: 48-52 percent of Panzhihua high titania type vanadium-titania magnet ore concentrate, 12-16 percent of Australian ore powder, 7.5-11.5 percent of strong flour, 3.5-5.5 percent of sieving powder, 1-3 percent of gas ash, 1-3 percent of steel slag, 4.3-4.7 percent of coke powder, 3.2-5.5 percent of lime stone, and 2.3-3.8 percent of dolomite. Adding dolomite into the sintering mixture can improve the intensity of the sintering ore and the ratio of finished products, improves the performance of sintering ore metallurgy and the performance of blast furnace slag, achieves the aim of improving sintering and blast furnace smelting technical and economical index, and reduces energy consumption of fuel. The method is simple and easy to operate, and highly flexible by only regulating the structure of sintering materials without altering the field process.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a preparation method of high-titanium high-MgO sintered ore. Background technique [0002] Panzhihua Iron and Steel (Group) Company's iron-containing raw materials for sintering are mainly Panzhihua high-titanium vanadium-titanium magnetite concentrate (accounting for more than 60% of the iron-containing raw materials), which has TiO 2 High content (12%-13%), Al 2 o 3 High, SiO 2 Low, coarse particle size (the -0.074mm particle size content is only about 50%, while the -0.074mm particle size content of ordinary iron concentrate is generally above 80%), and the particle size composition is unreasonable (0.25mm ~ 0.074mm which is not conducive to granulation It has the characteristics of high intermediate particle size), poor hydrophilicity, etc., and is a mineral that is particularly difficult to sinter. The sinter contains more brittle perovskite (CaO·TiO ...

AI Technical Summary

Problems solved by technology

The sinter contains more brittle perovskite (CaO·TiO 2 ), so the strength of sintered ore is poor, the yield is low, and the return rate is high

At the same time, due to the TiO in the blast furnace smelting process 2 The over-reduction of slag caused special problems such as sticky slag, difficult separation of slag and iron, and high iron loss. Although Panzhihua Iron and Steel has adopted many technical measures to strengthen sintering and blast furnace smelting since it was put into production, due to the inherent This is the main reason why the quality of vanadium-titanium sintered ore of Panzhihua Iron and Steel has been lagging behind that of ordinary sintered ore for a long time, and the difficulty of blast furnace smelting is the main reason why it is the "bottleneck" of Panzhihua Iron and Steel's production