Double-channel oxygen lance
A dual-flow, oxygen lance technology, used in furnaces, manufacturing converters, lighting and heating equipment, etc., can solve problems such as the inability to control the stable change of molten steel temperature in the converter, affecting the quality of molten steel, and increasing the burden of converter steelmaking.
Inactive Publication Date: 2012-11-14
WISDRI ENG & RES INC LTD
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Problems solved by technology
[0003] The coolant added in the converter steelmaking process can only be divided into several batches, which cannot control the steady change of the molten steel temperature in the converter. In addition, the added iron ore will also bring in impurities such as S, P, Si, etc., thereby increasing the converter smelting process. The burden of steel affects the quality of molten steel
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[0011] Such as figure 1 Shown, a kind of dual-channel oxygen lance, it comprises center tube 1, second layer tube 2, third layer tube 3, fourth layer tube 4; The upper end of center tube 1 is closed end, and the upper end of center tube 1 is set There is a connecting port (or a connecting head) and communicates with the oxygen pipe 13 and the nitrogen pipe 14 respectively (the oxygen pipe 13 and the nitrogen pipe 14 can be connected with the main channel 7 in the central tube 1 by opening the valve), and the oxygen pipe 13, the nitrogen pipe 14 is provided with a valve, the lower end of the central pipe 1 is provided with a (weldable) oxygen lance nozzle 6, and the oxygen lance nozzle is provided with a spray hole, and the spray hole communicates with the main channel 7 in the central pipe 1; The central tube 1 is covered with a second layer of tube 2, the upper and lower ends of the second layer of tube 2 are welded and closed with the central tube 1, and the secondary flow c...
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The invention belongs to the technical field of the converter steelmaking technology and in particular relates to a double-channel oxygen lance. The double-channel oxygen lance is characterized in that the oxygen lance contains a central pipe, a second-layer pipe, a third-layer pipe and a fourth-layer pipe, wherein the upper end of the central pipe is a sealed end, the upper end of the central pipe is provided with a connector which is communicated with an oxygen pipe and a nitrogen pipe respectively, the lower end of the central pipe is provided with an oxygen lance nozzle; the central pipe is sheathed with the second-layer pipe, an auxiliary channel is formed between the second-layer pipe and the central pipe, a main channel is communicated with the auxiliary channel through a main channel-auxiliary channel connector; the second-layer pipe is sheathed with the third-layer pipe, a cooling water inlet channel is formed between the third-layer pipe and the second-layer pipe; and the third-layer pipe is sheathed with the fourth-layer pipe, a cooling water backwater channel is formed between the fourth-layer pipe and the third-layer pipe, and the cooling water backwater channel is communicated with the cooling water inlet channel. The oxygen lance has two channels, CO2 can be introduced in the oxygen lance, and CO2 can be used as a coolant. Therefore, the defects of the traditional coolant can be changed; and the waste can be turned into wealth and energy conservation and emission reduction can be realized.
Description
technical field [0001] The invention belongs to the technical field of converter steelmaking technology, and in particular relates to a double-channel oxygen lance. Background technique [0002] Converter steelmaking technology uses molten iron, scrap steel, and ferroalloy as the main raw materials. It relies on the physical heat of the molten iron itself and the chemical reaction of Si, C, P, S, etc. in the molten iron with oxygen to generate heat without resorting to external energy. Through quicklime, fluorite, Dolomite and other slagging materials remove the generated impurities, and the excess heat released by converter steelmaking is added in batches to coolants such as iron ore and iron oxide scale to control the temperature of molten steel. Converter steelmaking is the most important steelmaking method, accounting for more than 80% of the total steel production in my country. It has the advantages of high production efficiency, good steel quality, low production cost...
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IPC IPC(8): C21C5/46F27D3/16
Inventor 盖东兴邵远敬叶理德刘洁王亮
Owner WISDRI ENG & RES INC LTD