A retractable blast furnace tapping main ditch steel structure

Abstract

The invention provides a telescopic type blast-furnace tapping main channel steel structure and belongs to the technical field of blast-furnace tapping equipment. A tapping main channel steel structure is divided into two or more sections in the molten iron flowing direction. A movable joint is additionally arranged between each section of and the corresponding back section of the tapping main channel steel structure, so that the tapping main channel steel structure is allowed to stretch or retract in the axial direction. Each movable joint is arranged inside the corresponding front section and the corresponding back section of the tapping main channel steel structure in a sleeved manner. First flanges of each front section and the corresponding back section of the tapping main channel steel structure and second flanges on the corresponding movable joint are provided with connection bolts and limiting nuts. The gaps between the movable joints and the front sections and the back sections of the tapping main channel steel structure are sealed through stainless steel lining plates. The telescopic type blast-furnace tapping main channel steel structure has the advantages that the telescopic type tapping main channel steel structure has the good extending and retracting function, especially in a long-distance tapping main channel, the telescopic type blast-furnace tapping main channel steel structure can effectively compensate for axial heat expansion of the main channel, and the main channel steel structure is prevented from being broken and cracked.

Description

technical field

[0001] The invention belongs to the technical field of blast furnace tapping equipment, and in particular relates to a retractable blast furnace tapping main ditch steel structure. Background technique

[0002] The main tapping channel of the blast furnace is the channel for the separation and discharge of slag and iron. With the enlargement of the blast furnace and the intensification of smelting, the amount of iron tapping and the tapping time are greatly increased, and the conditions for the main tapping channel are becoming increasingly harsh. In order to improve the service life of the tapping main ditch, most blast furnaces adopt cooling or adiabatic iron storage type main ditch, but it is still unavoidable to avoid problems such as weld cracking of the steel structure of the tapping main ditch caused by thermal expansion of refractory materials and steel structures. Leakage accidents happen from time to time. Contents of the invention

[0003] The o...

Examples

Embodiment Construction

[0019] Such as figure 1 As shown, after the slag and iron discharged from the blast furnace are separated in the tapping main ditch 1, the molten slag is introduced into the blast furnace slag treatment system through the slag ditch 2, and the molten iron flows into the molten iron tank through the iron ditch 3, and the residual iron in the tapping main ditch can pass through the residual Iron ditch 4 flows into ladle.

[0020] Such as figure 2 As shown, the tapping main ditch 1 is divided into inner and outer areas by the tapping main ditch steel structure 5 as the boundary; The thermal light clay brick layer 8 and the composite thermal insulation board 9 are composed; the exterior of the main ditch steel structure 5 is composed of a sand filling layer 10, a heat-insulating protection brick layer 11, and a civil heat-resistant concrete structure layer 12.

[0021] The blast furnace tapping main ditch steel structure 5 is a steel box with an open upper part, which can be di...

technical field

[0001] The invention belongs to the technical field of blast furnace tapping equipment, and in particular relates to a retractable blast furnace tapping main ditch steel structure. Background technique

[0002] The main tapping channel of the blast furnace is the channel for the separation and discharge of slag and iron. With the enlargement of the blast furnace and the intensification of smelting, the amount of iron tapping and the tapping time are greatly increased, and the conditions for the main tapping channel are becoming increasingly harsh. In order to improve the service life of the tapping main ditch, most blast furnaces adopt cooling or adiabatic iron storage type main ditch, but it is still unavoidable to avoid problems such as weld cracking of the steel structure of the tapping main ditch caused by thermal expansion of refractory materials and steel structures. Leakage accidents happen from time to time. Contents of the invention

[0003] The o...

Examples

Embodiment Construction

[0019] Such as figure 1 As shown, after the slag and iron discharged from the blast furnace are separated in the tapping main ditch 1, the molten slag is introduced into the blast furnace slag treatment system through the slag ditch 2, and the molten iron flows into the molten iron tank through the iron ditch 3, and the residual iron in the tapping main ditch can pass through the residual Iron ditch 4 flows into ladle.

[0020] Such as figure 2 As shown, the tapping main ditch 1 is divided into inner and outer areas by the tapping main ditch steel structure 5 as the boundary; The thermal light clay brick layer 8 and the composite thermal insulation board 9 are composed; the exterior of the main ditch steel structure 5 is composed of a sand filling layer 10, a heat-insulating protection brick layer 11, and a civil heat-resistant concrete structure layer 12.

[0021] The blast furnace tapping main ditch steel structure 5 is a steel box with an open upper part, which can be di...

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