Non-sticky steel converter oxygen lance and manufacturing method thereof

Abstract

The invention discloses a non-sticky steel converter oxygen lance and a manufacturing method thereof. The non-sticky steel converter oxygen lance comprises an oxygen lance connecting pipe and an oxygen lance spraying nozzle located at the bottom of the oxygen lance connecting pipe, wherein a compound coating is arranged at the outer side of the oxygen lance connecting pipe or the oxygen lance spraying nozzle. The non-sticky steel converter oxygen lance disclosed by the invention has the advantages of good quenching and quick heating resistant performance, good combining strength, poor wetting performance with steel liquid and obvious steel dreg-sticking prevention effect, the exchanging frequency of the oxygen lance connecting pipe and the oxygen lance spraying nozzle is reduced, the converter production efficiency is improved, and the potential safety hazard of equipment and persons is reduced; and the non-sticky steel converter oxygen lance has great economic benefits and use values.

Description

technical field [0001] The invention relates to a non-stick steel converter oxygen lance and a manufacturing method thereof. Background technique [0002] With the continuous enhancement of my country's comprehensive national strength, the steady development of the national economy, and the continuous improvement of infrastructure, my country has become the world's largest steel producer and a big steel consumer. Converter steelmaking is an important part of steel production, and oxygen lance is one of the key equipment for oxygen converter steelmaking. However, the oxygen lance is easy to stick to steel due to factors such as the slag not being melted well during the blowing process, the fluidity is poor, the metal spatter is serious, or the lance position is too low. When the oxygen lance sticks to steel less, it can be rinsed off with slag in the later stage of blowing. However, when the oxygen lance sticks to steel seriously, it needs to be handled manually after the b...

AI Technical Summary

Problems solved by technology

However, when the oxygen lance is seriously stuck to steel, manual treatment is required after the blowing is stopped, otherwise the oxygen lance must be replaced

Therefore, through the above treatment methods, it can be known that there will be adverse effects on the quality of steel, the life of the furnace lining, the consumption of materials, and the smelting time.

[0003] At the same time, the industry also proposed measures such as spraying graphite and tapered oxygen lances to ensure that the outer tube of the oxygen lance does not stick to steel or less sticks to steel, but the effect is not ideal

Because spraying graphite is mainly due to the huge equipment, inconvenient operation, and under the high temperature and molten steel washing, it is impossible to ensure that the sprayed layer is firmly attached to the outer tube wall of the oxygen lance, and once it falls off, it will not work.

As for the taper oxygen lance, the cooling effect is improved due to the faster cooling water flow rate after increasing the taper, but the steel sticking phenomenon still exists. At best, it is relatively easy to cool the steel, and the steel slag is easy to fall off.

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