Why can't aluminum smelting in blast furnace be carried out like ironmaking?

Smelting aluminum in blast furnace by the same method as ironmaking will lead to aluminum melting, and the melting point of aluminum is relatively low.

The invention relates to a method for continuously producing liquid pig iron in a vertical reactor-blast furnace by using coke, iron-containing ore, natural rich lump ore, sinter, pellet and flux, limestone and dolomite. It is an important link in modern steel production. Modern blast furnace ironmaking is developed from the transformation of ancient shaft furnace ironmaking method. Although many ironmaking methods have been developed in the world, the process is relatively simple.

High-temperature ironmaking has large output, high labor productivity and low energy consumption, so blast furnace ironmaking is still the main method of modern ironmaking, and its output accounts for more than 95% of the total pig iron production in the world. Facing the common problems of low growth, low efficiency, low price and high pressure in blast furnace ironmaking, only by fundamentally upgrading can it develop continuously.

The average coke ratio and coal ratio of large blast furnace are 349.4 kg/ton and 159.76 kg/ton respectively, and the average oxygen enrichment rate is 3.36%. Due to the low grade of ore in China, in order to ensure the stability of large blast furnaces, most imported raw materials are used, among which the proportions of sinter, pellet and lump ore are about 765,438+0.5%, 65,438+09.7% and 8.7%.