A kind of high vanadium high chromium type vanadium titanium magnetite pellets

Abstract

A high-vanadium and high-chromium type vanadium-titanium magnetite pellet, relating to the technical field of blast-furnace smelting in a high-vanadium and high-chromium type vanadium-titanium magnetite comprehensive utilization method. The high-vanadium and high-chromium type vanadium-titanium magnetite pellet comprises, in percentage by mass, chemical components: V2O5: 0.45-0.62%, TiO2: 2.29-3.20%, Cr2O3: 0.22-0.48%, TFe: 61.88-64.22%, CaO: 0.11-0.63%, SiO2: 3.18-4.77%, MgO: 0.32-0.89%, and Al2O3: 1.62-4.0%, with the balance being inevitable impurities, wherein in TFe, Fe2O3 accounts for 87.51-91.41% of the percentage by mass of the pellet, and FeO accounts for 0.3-0.8% of the percentage by mass of the pellet. In the raw material proportion for preparing the pellet, the proportion of bentonite is decreased by 1% or more, and therefore, the grade of the pellet can be improved; the quality of the fresh pellet can be practically and effectively improved, and the yield and the quality of the pellet can be ensured.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting in the comprehensive utilization method of high-vanadium and high-chromium vanadium-titanium magnetite, and in particular relates to a pellet of high-vanadium and high-chromium vanadium-titanium magnetite. Background technique [0002] With the growing gap between the supply and demand of domestic iron ore, iron and steel enterprises urgently need to expand the source of iron ore resources and develop high value-added vanadium-chromium products. Importing foreign iron ore resources has become a trend. Importing high-vanadium and high-chromium vanadium-titanium magnets Iron ore is a polymetallic co-associated ore rich in iron, vanadium, titanium, chromium and other valuable components, with extremely high application value. In the prior art, imported high-vanadium and high-chromium vanadium-titanium magnetite has problems such as coarse particle size, poor spheroidization, and large ...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is that the high-vanadium, high-chromium type vanadium-titanium magnetite pellets prepared by the prior art have coarse particle size, poor spheroidization, and bentonite consumption when preparing high-vanadium, high-chromium type vanadium-titanium magnetite pellets The shortcoming of large amount, a kind of high-vanadium high-chromium type vanadium-titanium magnetite pellet provided by the present invention adopts imported high-vanadium high-chromium type vanadium-titanium magnetite as raw material, and in the raw material ratio, the ratio of bentonite is reduced More than 1%, the grade of pellets has been greatly improved; the quality of green pellets has been effectively improved, and the output and quality of pellets have been guaranteed.