Single preheating, sintering, igniting and heat insulating furnace

Abstract

The invention relates to a single preheating, sintering, igniting and heat insulating furnace with the advantages of simple structure, little pollution, obvious energy saving effect and high safety. The furnace comprises an igniting section and a heat insulating section, wherein the igniting section and the heat insulating section are connected into a whole and are arranged on a sintering machinetable. The heat insulating section comprises an air preheating furnace, and an air heat exchanger is arranged in the air preheating furnace. The igniting section comprises a plurality of burning nozzles, and each burning nozzle is connected with a blast furnace gas pipe and a hot air pipe. A cold air inlet and a cold air input tube of the air heat exchanger are connected, and a fan is arranged onthe cold air input tube. A hot air outlet of the air heat exchanger is connected with an inlet of the hot air tube. The air heat exchanger is arranged on a trolley. When the single preheating, sintering, igniting and heat insulating furnace is in working, the sintering compound of the waste gas trolley outputted by the air preheating furnace is insulated, and sucked into a large fume passage by the sintering compound surface of the trolley. The large fume passage is connected with the hot waste gas heat energy recovery system and the waste gas treating system to recover and utilize heat energy and remove harmful elements of sulphur and the like in the waste gas.

Description

technical field [0001] The invention relates to a thermal sintering machine-bonded ignition furnace in the metallurgical industry, in particular to a single preheating sintering ignition holding furnace. Background technique [0002] Sintering is an important part of the ore preparation process in the metallurgical industry, especially in iron and steel smelting, and it is also one of the key operations that affects the energy consumption index of the entire smelting process. At present, most ignition furnaces in sintering plants use low calorific value gas (generally blast furnace gas) as fuel. Due to the low calorific value of low calorific value gas, the gas or air must be preheated to meet the ignition temperature required for the sintering process, so low calorific value gas is built. The gas ignition furnace must be equipped with a preheating furnace to preheat the gas and air, resulting in a large shape of the ignition furnace, high investment, and many safety hazards...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent announcement number CN2708125 discloses a regenerative sintering machine ignition furnace with low calorific value gas. Since it is difficult to have a clean heat source in the ignition furnace, no product has been put into use in China so far.

However, the self-preheating gas ignition holding furnace has a poor preheating effect, which has a quenching effect on the sintered ore after ignition and affects the strength of the sintered ore.

If the form of double preheating is adopted, the structure is complicated and the cost is high. When preheating the blast furnace gas, heat exchange damage is easy to occur, so there is a big safety hazard.

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