Method and device for improving reduction efficiency of furnace stack by using high-reactivity coke
A high-reactivity coke and high-efficiency technology, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as substantial advancement difficulties, and achieve the effects of reducing the Coanda effect, expanding the range, and uniform airflow
Inactive Publication Date: 2013-02-06
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
The traditional blast furnace ironmaking process has been finalized after long-term development, and the equipment and operation level have also tended to be stable. If the traditional technology is continued to be used, the potential for "energy saving and emission reduction" for blast furnace ironmaking is already very small, especially in poor-quality mines and coal resources. Under the background of globalization, the substantive advancement of this work is even more difficult
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[0051] 1) Effect of coke reactivity on reduction degree of iron ore
[0052] (1) Crush the sintered ore and three kinds of cokes with different reactivity, select the R20 series mesh screen of GB / 6003, and sieve the Baosteel sintered ore of 10~12.5mm and the three kinds of cokes of 8~10mm respectively. Tumble dry at low temperature.
[0053] (2) Select 150g of one of the three cokes A, B, and C, and 450g of sintered ore, and add them to the reaction tube of the static load reduction furnace in a five-layer distribution method, and seal the reaction tube. fabric schematic Figure 4 shown.
[0054] (3) The N flow rate is 2L / min 2 protection, start heating at a heating rate of 15°C / min. At 1100°C, 8L / min of 32.5%CO+12.5%CO was introduced 2 +55%N 2 Mixed gas, after constant temperature reaction for 2 hours, N with a flow rate of 2L / min 2 Protect and cool to room temperature.
[0055] (4) After the experiment, the coke and iron ore were separated and weighed separately to...
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The invention relates to a method and a device for improving reduction efficiency inside a blast furnace by using high-reactivity coke. A method for improving reduction efficiency of a furnace stack of the blast furnace is characterized in that the iron-containing furnace charge of the blast furnace contains sintered ore, pellet and lump ore, high-reactivity coke is used in the blast furnace, and the sintered ore is disposed at the periphery of the high-reactivity coke. According to the invention, on the premise of not increasing process flow and equipment complexity, started from the clue of improving the reaction efficiency inside the blast furnace, the method for improving reduction efficiency inside the furnace by using the high-reactivity coke, namely the traditionally conceptual poor-quality coke, is developed. The promotion effect of coke reactivity to iron ore reduction and the condition that the effect of the high-reactivity coke can be better exerted by matching the high-reactivity coke with which ore type are researched by experiments, thereby laying the foundations for use of the high-reactivity coke in the blast furnace. The method not only can improve the reduction efficiency of the furnace stack, but also effectively expand the coke use range of the blast furnace.
Description
[0001] technical field [0002] The invention relates to a method and device for improving the reduction efficiency in a blast furnace by using high-reactivity coke. [0003] Background technique [0004] Using search criteria: abstract=(blast furnace) AND abstract=(high reactivity coke); or, abstract=(blast furnace) AND abstract=(reduction efficiency); and abstract=(blast furnace) AND abstract=(high reactivity coke) in Search databases at home and abroad. After careful searching, there is no content of invention identical or similar to this patent application. [0005] The iron and steel industry is an important basic industry of my country's national economy, and it is also one of the industries that consumes a lot of energy and resources and emits a lot of pollutants. According to statistics, the energy consumption of my country's iron and steel industry accounts for about 14% of the country's total energy consumption, while the discharge of major pollutants accounts f...
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IPC IPC(8): C21B5/00C21B7/00
Inventor 吴胜利张丽华庹必阳武建龙孙颖
Owner UNIV OF SCI & TECH BEIJING