Blast-furnace ironmaking energy-saving novel process and equipment

Abstract

The invention belongs to the technical field of smelting and relates to a blast-furnace ironmaking technique, in particular to a blast-furnace ironmaking energy-saving novel process and blast-furnace ironmaking energy-saving cantilever ball press equipment. The blast-furnace ironmaking energy-saving novel process comprises the following steps: mechanical manufacturing, ball making, direct reduction and vacuum cooling, wherein the ball making step is to form mixed iron ore powder into uniform ore powder balls; the formed ore powder balls are transported by a trolley to a direct reduction dryer to be reduced directly; the directly reduced ore powder balls are cooled under vacuum; and the ore powder balls are delivered to a blast furnace for high-temperature melting. In the invention, the drawbacks of the prior blast-furnace ironmaking process flow are overcome effectively, special equipment, namely cantilever ball press, is adopted, and the conventional sintering equipment and process are changed, and thus the blast-furnace ironmaking energy-saving novel process is realized.

Description

technical field [0001] The invention belongs to the technical field of smelting, and specifically relates to a blast furnace ironmaking technology, in particular to a new blast furnace energy-saving technology for ironmaking and its equipment—a cantilever briquetting machine. Background technique [0002] At present, blast furnace ironmaking accounts for more than 95% of the country's total production, and they are all completed in blast furnaces with different volumes (the largest is more than 5000m 3 , the smallest is about 125 m 3 ). Nevertheless, their production process and chemical reaction in the furnace are the same. With nearly 150 years of technological improvement, it has gradually improved from the initial nearly 8000Kg coke to smelt one ton of iron to today's 450~650Kg coke to smelt one ton of iron; at the same time, in the sintering process in the previous process, it has gradually improved from the initial open-air sintering Up to today's mechanized sinteri...

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Problems solved by technology

In addition, in the current blast furnace ironmaking process, the strength of the sintered material is not enough, and it is easy to disperse when it is melted at high temperature in the blast furnace, which seriously affects the air permeability of the blast furnace, thereby adversely affecting the quality of ironmaking and energy consumption, making the melting Reduced speed and drop rate

[0008] Practice has proved that it is unrealistic to realize the ideal energy-saving effect of the existing blast furnace ironmaking process in my country, and the same is true in developed countries. A large number of practices have proved that the traditional blast furnace ironmaking process is at the end of the road, and there is an urgent need for a new blast furnace Ironmaking process

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