Mouth fixed section flue of gasification cooling flue for steel-making converter

Abstract

The invention relates to a glory-hole fixed field flue of evaporated cooling flue used in steelmaking converter, which consists of a lower collector(21) placed on the said glory-hole fixed field flue, an oxygen muzzle and a charge door and in which the said lower collector(21) connects with the intake port of the glory-hole fixed field flue heated pipe, and is characterized in that: the said lower collector(21) is placed at a little far location from the glory-hole fixed field flue end (22), the said charge door and oxygen muzzle heated pipe (28) are arranged for direct folded pipe, the said charge door and oxygen muzzle heated pipe (28) consist of two parts including inner tube (29) and outer tube (30), in which the outer tube (30) is freed outside the inner tube (29), the cooling water inflows from the inner tube (29) and cycles to outer tube (30) for water outlet, every heated pipe (28) forms a separate circuit, the inner axis of the heated pipe (27) among a range of 120 degrees above the glory-hole fixed field flue break point a splitter (31) is founded, and the said splitter (31) is prepared as cochleiform. The invention is of long durability and is of safe reliability.

Description

Technical field: [0001] The invention relates to a gasification cooling flue for a steelmaking converter, in particular to a gasification cooling flue for a steelmaking converter at a fixed section of the furnace mouth. It belongs to the technical field of oxygen top-blown converter steelmaking equipment. Background technique: [0002] The oxygen top-blown converter steelmaking method is a steelmaking technology that has been produced and developed in the past 50 years. It does not need external heat supply, and uses the carbon in the molten iron to combine with industrial pure oxygen to generate heat for the needs of steelmaking. Oxygen passes through the oxygen lance, from the top of the furnace mouth of the converter, and penetrates into the appropriate position above the molten iron in the converter for blowing. During the blowing process, iron oxides and carbides in molten iron produce a large amount of carbon monoxide and release a large amount of heat at the same ti...

AI Technical Summary

Problems solved by technology

The header is directly heated, and the internal vaporization deteriorates the water circulation. The direct result is that the fillet weld between the heating pipe and the header often cracks and leaks

Seriously affected the output of steelmaking. The general service life is about half a year. Due to the complex structure of this part, it is difficult to replace it. Therefore, this period of service life has always troubled steelmaking plants.

[0011] 2. The flue of the fixed section of the furnace mouth is equipped with an oxygen gun mouth and a feeding port, so holes must be opened on the flue heating pipe of the fixed section of the furnace mouth

When steam and water flow in layers, there is water cooling in the lower part of the tube to avoid overheating, and there is no water film cooling in the upper part of the tube, which may lead to overheating and tube explosion accidents

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