Blast furnace hot blast stove and construction method thereof

Abstract

The invention discloses a blast furnace hot blast stove and a construction method thereof, belonging to the technical field of hot blast stoves. With the adoption of the blast furnace hot blast stove and the construction method thereof, the deficiencies of the prior art are overcome, and the blast furnace hot blast stove which is low in manufacture cost and high in heat utilization efficiency andthe method of constructing the blast furnace hot blast stove are provided. A stove wall is in a shape of a cylinder, a plurality of parallel bottom walls are arranged in the stove wall at equal intervals, two ends of each bottom wall are both connected to the stove wall, a main air duct is arranged at one side of the stove wall vertical to the direction of the bottom walls and penetrates through all the bottom walls, a circular stove grate arranged in the stove wall is arranged above the bottom walls, and the stove top is arranged at the upper part of the stove grate. The construction method comprises the following steps firstly, constructing a foundation and the stove wall, and reserving the arched main air duct on the stove wall; secondly, constructing the plurality of parallel bottom walls in the stove wall at equal intervals; thirdly, installing the stove grate at the upper part of the bottom walls; and fourthly, installing the stove top at the upper part of the stove grate. The blast furnace hot blast stove and the construction method thereof are mainly used for metallurgy industry.

Description

technical field [0001] The invention relates to a blast furnace hot blast stove and a construction method thereof, belonging to the technical field of hot blast stoves. Background technique [0002] The hot blast stove is a key component of the ironmaking blast furnace in the metallurgical industry. It is used for the exchange of hot and cold air. After heat exchange, the blower sends it to the hot blast stove through the pipeline, and then into the blast furnace. Their function is to continuously provide high-temperature hot air above 1000°C for the blast furnace. [0003] Hot blast stoves generally use blast furnace gas and coke oven gas as fuel. Under the condition of using blast furnace gas, the method of preheating combustion-supporting air and gas can increase the air temperature to above 1200-1300 °C. [0004] However, the existing hot blast stove adopts the structure that gas enters the bottom of the hot blast stove through the flue, and the furnace grate of heat-re...

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Problems solved by technology

[0005] The problems existing in the existing hot blast stoves are: the bottom of the hot blast stove is made of cast iron heat-resistant furnace grates, the heat transfer temperature cannot be too high, which limits the combustion temperature, and the bottom of the hot blast stove can only reach 350 ° C. Since the temperature cannot be too high, The effective utilization area of ​​the hot blast stove can only reach about 70%, resulting in a large part of the waste of hot blast stove space, which is not conducive to lean production

And if the bottom of the hot blast stove exceeds 350°C, the high temperature will deform the furnace grate and even cause the hot blast stove to collapse.

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