Hot-blast duct compensator masonry structure of hot-blast furnace

Abstract

The invention relates to a hot-blast duct compensator masonry structure of a hot-blast furnace, belonging to the technical field of hot-blast furnaces in the metallurgical industry. The masonry structure comprises a duct steel shell, an annular plate, a corrugated tube, expansion joints, a heat insulation layer, fireproof spray paint, a first heat insulation brick layer, a second heat insulation brick layer, refractory bricks, dilation joints of the first heat insulation brick layer, dilation joints of the second heat insulation brick layer, dilation joints of the refractory bricks, and special-shaped refractory bricks. According to the invention, the special-shaped refractory bricks effectively protect refractory fiber blankets filled in the dilation joints, thus preventing the refractory fiber blankets from being carried away by high-temperature high-pressure air flow in the working period of a hot-blast duct, especially in the early working stage; under the double action of the special-shaped refractory bricks and heated compaction, the refractory fiber blankets can stably work for long time and absorb heat to dilate, thus protecting the corrugated tube; the arrangement of the inverse labyrinth dilation joints is opposite to the direction of air flow, thus ensuring that the air flow is more difficult to leak into the corrugated tube and forming multiple protection on the corrugated tube; and latching of the refractory bricks and the special-shaped refractory bricks increases the overall stability of the masonry, thus ensuring the long-time stable work of the hot-blast duct.

Description

technical field

[0001] The invention belongs to the technical field of hot blast stoves in the metallurgical industry, and in particular provides a hot blast stove hot blast pipe compensator masonry structure, which is suitable for hot blast stoves used in blast furnace ironmaking and smelting reduction ironmaking in the ironmaking process. It can also be used in other industrial technical fields that need to heat the gaseous medium to above 1000°C. Background technique

[0002] It has been nearly 200 years of history to use hot blast stove to heat blast in blast furnace ironmaking. After heating, the blast temperature is only 149°C at first. With the continuous advancement of technology, the current maximum wind temperature has reached 1350 °C. The increase of air temperature can greatly reduce the coke ratio, save coke, increase the output of blast furnace, and make full use of blast furnace gas with low calorific value, improve thermal efficiency, reduce gas emission, sa...

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