Negative micropressure ignition system for sintering machine bellows

Abstract

The invention discloses a micro-negative pressure ignition device for a bellows of a sintering machine. The trolley is located at the upper end of the bellows, and the igniters are arranged at intervals on the top of the trolley. The packing is connected with the upper part of the bellows pipe. A vibrating motor is installed on the side wall of the bellows pipe, and the observation hole with the observation hole cover is set in the middle of the bellows pipe. The upper end of the double-layer ash discharge valve is connected with the lower end of the bellows pipe through the second graphite packing. The lower end of the ash valve is connected with the discharge pipe through the third graphite packing. The bellows wear-resistant connecting pipe installed on the other side wall of the bellows pipe is connected to the inner cavity of the ventilation box pipe. The bellows wear-resistant connecting pipe is connected with one end of the wear-resistant elbow through the connecting plate, and the other end of the wear-resistant elbow is connected vertically through the resistance balance valve. The upper end of the connecting pipe and the lower end of the vertical connecting pipe are connected to the shaft air duct and the large flue through a stuffy cover. The micro-negative pressure ignition device can realize the separation of gas and matter, effectively control the sintering thickness of sintering materials, improve the grade of sintering ore, and reduce production costs.

Description

technical field [0001] The invention relates to an ignition device, in particular to a micro-negative pressure ignition device for a sintering machine bellows used in the sintering process of providing high-quality sintered ore for ironmaking blast furnaces. Background technique [0002] As we all know, iron-containing fine ore cannot be directly put into the metallurgical blast furnace for ironmaking. It must go through the sintering process to turn the iron-containing fine ore into sintered ore before it can be put into the metallurgical blast furnace. In the sintering process of iron-containing powder ore, the sintering material is usually placed in the trolley, the igniter is placed at a certain interval above the trolley, and two symmetrical bellows are installed below the trolley. The lower end is connected with double-layer valves, and the operation of the two double-layer valves installed at the lower end of the bellows is controlled by an electric pull rod. The igni...

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Problems solved by technology

[0003] ①The valve used is a double-layer valve. When the upper layer of the valve is opened, the lower layer will be closed. On the contrary, when the lower layer is opened, the upper layer will be closed. When there are many blanking materials on the sintering machine trolley, this double-layer valve will be stuck. , resulting in an unstable sintering process

[0004] ②The ignition device of this kind of tie-rod structure cannot (or does not) separate gas and matter, because the blanking on the sintering machine trolley and the exhaust air of the large flue are the same pipe, resulting in serious wear and tear of the double-layer valve and short service life , the maintenance (maintenance) cost is high, which directly affects the production process

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