Additive for saving energy in process of sintering iron ore

Abstract

The invention discloses an additive for saving energy in the process of sintering iron ore. The additive is aminoethanol, which has a common name of ethanolamine. The using amount of the ethanolamine is 0.06 to 0.3 percent of the mass of coke powder for sintering. During use, the ethanolamine is dissolved in water to be prepared into a solution; adding the aqueous solution into the coke powder, mixing uniformly in advance; and mixing with blended ore and a fusing agent, and pelletizing for sintering. The additive can improve the combustion efficiency of the coke powder in the sintering process, reduce consumption of solid fuel, and improve the yield and quality of the sintered ore. The additive has the characteristics of wide sources, low cost, environmental friendliness and the like.

Description

technical field [0001] The invention relates to an additive, in particular to an additive for iron ore sintering and energy saving. Background technique [0002] Sinter is the main raw material for blast furnace ironmaking in my country, accounting for 70% to 80% of the iron-containing raw materials in the furnace. In the process of steel production, the energy consumption of the sintering process accounts for about 10% of the total energy consumption of steel production, second only to ironmaking, and is the second largest energy consumer in steel production. The energy consumption of the sintering process mainly includes solid fuel consumption, electricity consumption, ignition gas consumption, etc. Among them, the solid fuel consumption is the main part of the sintering energy consumption, accounting for about 75% to 80%. In recent years, although my country's sintering energy consumption has declined, it is still about 10-15kg / t-sintered ore higher than the energy consu...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned additives have played a certain role in reducing the consumption of sintered solid fuel and improving the output quality of sintered ore, but the above-mentioned additives are all prepared by mixing various substances, and some of them will reduce the grade of sintered ore after adding additives (such as containing bentonite Additives), some will adversely affect the metallurgical properties of sinter (such as boron-containing additives), and a few additives will corrode sintering equipment and pollute the environment (such as chlorine-containing additives)