Oxygen gun opening nitrogen sealing device

Abstract

The invention relates to equipment belonging to the field of converter steelmaking, and in particular relates to an oxygen gun opening nitrogen sealing device. The nitrogen sealing device comprises a nitrogen sealing plug and a nitrogen sealing base, wherein the nitrogen sealing plug comprises an upper big-port end and a lower small-port end; matched sealing surfaces are formed by the outer surface of the nitrogen sealing plug and the inner surface of the nitrogen sealing base; an oxygen gun opening is formed in the nitrogen sealing base; an oxygen gun is sleeved with the nitrogen sealing plug; a nitrogen sealing round hole I is formed in the lower part of the nitrogen sealing plug; the nitrogen sealing round hole I is communicated with a plurality of nitrogen channels I; a nitrogen sealing round hole II is formed in the upper part of the nitrogen sealing plug; the nitrogen sealing round hole II is communicated with a plurality of nitrogen channels II; a conical cavity is formed in the nitrogen sealing plug. The nitrogen sealing device disclosed by the invention has the advantages of being capable of sealing twice and decompressing high-pressure smoke, and good in sealing effect.

Description

technical field [0001] The invention relates to equipment in the field of converter steelmaking, in particular to an oxygen muzzle nitrogen sealing device. Background technique [0002] As the steel industry is facing increasing pressure on environmental protection, the impact of flue gas and dust produced by converter steelmaking on the environment is more sensitive. the key of. The oxygen lance is installed above the vaporization flue of the converter, and a large amount of high-temperature flue gas and dust are generated during the steelmaking process of the converter. However, due to the poor sealing effect of the oxygen lance, a large amount of high-temperature flue gas and dust leak out, which will cause Environmental pollution, equipment damage and even casualties. [0003] Converter steelmaking can be divided into multiple processes such as iron loading, smelting, tapping, slag splashing, slag dumping, furnace repair, treatment of oxygen lance sticking to steel, an...

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Problems solved by technology

[0004] The traditional oxygen lance nitrogen sealing device mainly has the following problems: First, the nitrogen sealing effect is poor, especially when splashing occurs in the converter smelting process, because the instantaneous pressure of the converter flue gas increases, it will cause a large amount of high-temperature flue gas and dust outside Second, the traditional nitrogen blanketing device only treats the flue gas and dust generated in the process of converter smelting and slag splashing, but it does not treat the flue gas and dust generated in the process of iron loading, tapping, repairing furnace, and handling oxygen lance sticking steel. The dust is not processed, which is the deficiency in the prior art

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