Igniting device and ignition method for sintering

Abstract

The invention discloses an igniting device and an ignition method for sintering and belongs to the field of iron smelting of a blast furnace. The igniting device disclosed by the invention comprises an ignition furnace, a gas charging pipe and a hot air charging pipe; a row of burner nozzles are arranged on a part, at an ignition section of the ignition furnace, of the furnace top; the middle burner nozzles are arranged linearly; the burner nozzles close to the two sides of a sintering machine trolley are arranged in an arc shape; each burner nozzle communicates with the gas charging pipe and the hot air charging pipe respectively; the parts, at the front end and the rear end of the ignition section, of the furnace top are each provided with an isolation chamber; each isolation chamber communicates with the hot air charging pipe; an air box is arranged at the bottom of the ignition furnace, wherein a retarder is arranged inside the air tank under the burner nozzles. The igniting device disclosed by the invention has the advantages of optimizing distribution of an igniting fuel on an overall sintering material surface, balancing the ignition quality of sintering materials at all positions of a sintering machine, improving the quality of sintered ore products, also enhancing the ignition effect, reducing consumption of the igniting fuel and satisfying the production process requirements on energy conservation and environmental protection.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, and more specifically relates to a sintering ignition device and an ignition method. Background technique [0002] The sintering process is a major energy consumer in steel production, mainly including solid fuel consumption, gas consumption, and electricity consumption, of which solid fuel consumption accounts for about 75%, electricity consumption accounts for about 15%, and gas consumption accounts for about 6%. In the sintering process, the purpose of ignition is to provide enough heat on the surface of the mixture to ignite and burn the solid fuel in it, and at the same time make the surface mixture dry, decarburize and sinter under the action of high-temperature flue gas in the igniter, and with the help of The draft makes the sintering process continue from top to bottom. [0003] The structure and form of the ignition device have a great influence on the quality of the i...

AI Technical Summary

Problems solved by technology

However, the spare burner has been baked at high temperature in the furnace for a long time, which is very easy to damage, and the conversion and use of the normal burner and the spare burner is relatively cumbersome

Patent No. "ZL892092181" discloses a curtain-type igniter, the flame length can be adjusted by the ratio of the primary and secondary air volume, the adjustment of the flame length is a common practice in the sintering ignition furnace industry, but practice has proved that the flame can elongate the distance Short and high gas consumption

[0005] To sum up, although the current sinter ignition devices have various types and different designs, they generally have the disadvantages of low ignition quality, which in turn leads to high energy consumption for sintering and limited quality of sintered ore. How to effectively improve the quality of sintered ore and reasonably Reducing its energy consumption has become the main direction of development in the industry

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