A kind of slag accumulating cooling device and working method under the furnace

Abstract

The present invention relates to an under-furnace slag cooling device and working method, in particular to a nozzle and a slag cooling device, including a fire-retaining wall and a liquid spraying device; the liquid spraying device includes: a liquid spraying rod and an infusion tube; The liquid spray rod is arranged on the track side of the fire-retaining wall, the liquid inlet at the end of the rod body of the liquid-spray rod is connected with the infusion tube, and the other end of the infusion pipe passes through the fire-retaining wall and is connected with the liquid storage device, and the liquid spray rod The liquid outlet at the end of the rod body is provided with the nozzle. The present invention uses the above-mentioned device to reduce the temperature of the slag accumulated under the furnace, effectively preventing the molten slag from adhering to the track, avoiding the deformation of the track, and at the same time not generating Dangerous shooting phenomenon.

Description

technical field [0001] The invention relates to the field of converter steelmaking, in particular, the invention relates to an under-furnace slagging cooling device and a working method. Background technique [0002] The converter is a container for melting molten iron scrap steel into molten steel after a series of complex chemical changes through oxygen blowing. During the converter smelting process, a large amount of molten slag will be produced, and part of the molten slag will fall into the lower rail of the furnace to form slag accumulation. Since the initial temperature of the accumulated slag is as high as 1000 degrees or more, it will cause certain damage to the surrounding key equipment such as rails, ladle car body, slag car body, slag retaining plate, etc., which reduces the life of the equipment, and seriously causes the equipment to deform and cannot be used. forced to replace. If there is a lot of liquid steel in the accumulated slag, it is easy to adhere to...

AI Technical Summary

Problems solved by technology

Since the initial temperature of the accumulated slag is as high as 1000 degrees or more, it will cause certain damage to the surrounding key equipment such as rails, ladle car body, slag car body, slag retaining plate, etc., which reduces the life of the equipment, and seriously causes the equipment to deform and cannot be used. forced to replace

If there is a lot of liquid steel in the accumulated slag, it is easy to adhere to the steel equipment and is not easy to peel off. If the rail under the furnace is adhered by liquid steel, it is easy to form nodules on the rail, making the rail partially deformed. Coarse or even deformed, resulting in production accidents such as ladle trucks and slag truck wheels falling off the road, and the converter is forced to turn to the maintenance state, which will seriously affect the production progress, and the recovery time is generally more than 8 hours

When the rail under the furnace is seriously deformed due to adhesion and cannot be used, it is necessary to replace the rail, and the replacement time will be as long as 30 hours or more, which will have a great impact

[0003] In the prior art, there is no effective cooling method for molten slag falling into the track. Although water cooling is a common method in many fields, in the field of smelting, especially in the field of steelmaking, due to the particularity of the application environment, There is a great danger in using water to cool the track slag. In the prior art, it is forbidden to use water to cool down the high-temperature slag. When pouring the slag, it must not be poured in a wet or water-logged place to avoid the phenomenon of blasting (explosion). Therefore, there are many technical problems that need to be solved in cooling the slag with water, which limits the use of water to cool down the rail slag under the furnace.

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