Fuel gas and steam coupled sintering machine

Abstract

The invention discloses a fuel gas and steam coupled sintering machine. The fuel gas and steam coupled sintering machine comprises a sintering trolley running in the sintering direction and an ignition furnace device arranged above the sintering trolley and further comprises a fuel gas and steam coupling device arranged above the sintering trolley and located behind the ignition furnace device in the sintering direction; the fuel gas and steam coupling device sequentially comprises a fuel gas injection unit, a fuel gas and steam coupling injection unit and a steam injection unit which are isolated from one another in the sintering direction. After overall carbon reduction of sintered ore, heat compensation is carried out on an upper-layer material area which is most required to be subjected to heat compensation through fuel gas injection. The gas injection starting time is reasonable, upper-layer materials are timely subjected to gas heat compensation, the quality of upper-layer finished product sintering ore is improved, the overall gas injection enhanced sintering effect is remarkable, and sintering is facilitated. In other words, heat compensation can be carried out on temperature drop generated by the steam through fuel gas injection, local high temperature generated by the fuel gas can be reduced through the steam, and therefore influences caused by the steam temperature drop and the local high temperature of the fuel gas can be eliminated, and the sintering effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of sintering, in particular to a sintering machine coupled with gas and steam. Background technique [0002] Sintering is the main raw material processing technology for iron and steel smelting in my country, and more than 75% of blast furnace raw materials come from sintering ore. [0003] At present, the head of the sintering machine is equipped with an ignition furnace, and an ignition burner is installed in the ignition furnace. The sintering machine trolley is connected end to end and installed on the sintering machine. orbit. A bottom bellows is installed under the track of the sintering machine, the upper part of the bellows corresponds to the bottom of the trolley, and the lower part of the bellows is connected to the large sintering flue. The sintering of this device mainly utilizes pulverized coal combustion to generate a large amount of heat, resulting in high energy consumption and heavy emissi...

AI Technical Summary

Problems solved by technology

[0007] However, the unburned gas injected by the gas injection technology will catch fire when it encounters a local high temperature point on the material surface, which will affect the production safety and sintering effect; while the steam injection technology The ejected steam absorbs heat through the water-gas reaction, and premature injection affects the formation of the combustion zone and the sintering effect

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