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Oxygen lance nozzle

An oxygen lance nozzle and nozzle technology, which is used in furnaces, manufacturing converters, lighting and heating equipment, etc., can solve the problems of high ambient temperature, easy erosion of the lower end surface, uneconomical steelmaking enterprises, etc. The effect of reducing splash phenomenon and reducing equipment consumption

Inactive Publication Date: 2010-12-29
JIANGSU BOJI HEATING TECH
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Problems solved by technology

[0002] At present, the oxygen lance nozzle used in converter steelmaking has a harsh environment and high ambient temperature on the lower end surface of the nozzle during the injection process, and because the molten material splashes during the decarburization process of steel, the lower end surface is prone to erosion. Damage to the lower end surface affects the jet angle and precision of the nozzle hole, and affects the time of steel smelting and decarburization. Not only do nozzles need to be replaced frequently, but also the efficiency of steel smelting and decarburization is greatly affected. This is very important for steelmaking enterprises. uneconomical

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Embodiment Construction

[0014] The lower part of the oxygen lance nozzle of the present invention is arranged in the molten pool, including the nozzle body 1 , the nozzle body 1 is provided with rako-open nozzle holes 2 in the circumferential direction, and the lower end surface of the nozzle is covered with a layer of nickel-chromium alloy layer 3 . The thickness of the nickel-chromium alloy layer 3 is 1.5-2mm. The axis of the nozzle hole 2 forms an included angle α with the nozzle axis, and α is between 5°-20°. The nozzle hole 2 and the axis plane of the nozzle body 1 form an included angle β, and β is between 5°-20°.

[0015] The preferred mode of the present invention is α=β=12°, and this angle is especially suitable for a nozzle with four nozzle holes 2 .

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Abstract

The invention discloses an oxygen lance nozzle, which relates to accessories used in steel smelting. The lower end of the oxygen lance nozzle is arranged in a molten pool; and the oxygen lance nozzle comprises a nozzle body, wherein a plurality of spray holes are formed on the periphery of the nozzle body, and the lower end face of the nozzle is coated with a nickel and chromium alloy layer. In the invention, the lower end face of the nozzle body is coated with nickel and chromium alloy layer, so that the lower end face of the nozzle body can be well protected due to the high-strength and anti-corrosion performance of the nickel and chromium alloy; the included angle between the axis of the nozzle and the axes of the spray holes and the included angle between the axial plane of the spray holes and the axial plane of the nozzle body make tangential component energy generated when oxygen jet flow is jetted into the molten pool, so the stirring between furnace slag and molten steel is improved; meanwhile, the splashing is avoided, the steel making smelting is improved, the decarburization efficiency is improved, and the service life of the nozzle is improved.

Description

technical field [0001] The invention relates to an accessory in iron and steel smelting, in particular to the improvement of an oxygen lance nozzle. Background technique [0002] At present, the oxygen lance nozzle used in converter steelmaking has a harsh environment and high ambient temperature on the lower end surface of the nozzle during the injection process, and because the molten material splashes during the decarburization process of steel, the lower end surface is prone to corrosion. Damage to the lower end surface affects the jet angle and precision of the nozzle hole, and affects the time of steel smelting and decarburization. Not only do nozzles need to be replaced frequently, but also the efficiency of steel smelting and decarburization is greatly affected. This is very important for steelmaking enterprises. Said to be extremely uneconomical. Contents of the invention [0003] The purpose of the present invention is to provide an oxygen lance nozzle which can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D3/16C21C5/46
Inventor 管序荣江安孙亚军李有怀徐敏文
Owner JIANGSU BOJI HEATING TECH
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