Oxygen pressure adjustment apparatus and adjustment method for electric furnace

A technology of adjustment device and adjustment method, applied in furnace control device, electric furnace, furnace and other directions, can solve the problems of valve oscillation, high pressure, and inability to drop the working pressure, and achieve the effect of small modification and low cost

Active Publication Date: 2013-09-25
ANHUI MA STEEL AUTOMATION INFORMATION TECH
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Problems solved by technology

However, in some occasions, if the buffer tank (gas distributor) cannot be configured due to space or capital constraints, at this time, due to the large and small flow difference of more than 40 times, it is difficult to meet the requirements of pressure reduction and pressure stabilization with only one pressure regulating valve For example, when the large flow rate is adjusted, the pressure is stable, but when the flow rate is reduced, the decompression is very slow, the working pressure cannot drop, and the pressure is high; when the small flow rate is adjusted, the pressure is stable, but when the flow rate is increased, the valve will osc

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  • Oxygen pressure adjustment apparatus and adjustment method for electric furnace

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Embodiment Construction

[0015] The present invention aims to solve the problem of overcoming the influence of huge changes in production gas and stabilizing the gas delivery pressure in the occasion where a gas buffer tank cannot be installed. Utilize two membrane regulating valves, one large and one small, and set several working points according to the set value of the flow rate, and automatically switch between the two valves. The large valve and the small valve cooperate to adjust each other, which can ensure the pipeline gas under the large and small flow rate. The pressure remains stable, meets the requirements of the process, and saves equipment investment.

[0016] specific as figure 1 As shown, the present invention is that the oxygen main pipe 1 is connected to the burner and the oxygen lance through the main pipe 5 and the branch road 6 respectively; There is a branch regulating valve 4, so that the pressure adjustment of the oxygen main pipe can be realized through the cooperation of the...

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Abstract

The invention discloses a adjusting method of an oxygen pressure adjustment apparatus for an electric furnace. The oxygen pressure adjustment apparatus is characterized in that an oxygen gas total pipe is connected to a burning nozzle and an oxygen gun respectively through a main pipeline and a branch, the main pipeline is provided with a main pipeline shut-off valve and a main pipeline adjustment valve, and the branch is provided with a branch adjustment valve. With application of the structure, the oxygen pressure adjustment apparatus has the following advantages that: pressure adjustment of the electric furnace oxygen gas total pipeline can be achieved with a low cost, the change on the existing pipeline is less, and normal electric furnace use is not affected.

Description

technical field [0001] The invention relates to the field of electric furnace steelmaking, in particular to an oxygen pressure regulating device and method for electric furnaces. Background technique [0002] In modern large-scale electric furnace steelmaking, in addition to energizing the electrodes, oxygen lances and nozzles are also used to blow oxygen into the furnace for auxiliary heating. There are several modes of oxygen blown in: burner ignition, burner preheating, burner cutting, burner refining, etc. The amount of oxygen is switched according to the set value of different time periods in different modes. The minimum oxygen consumption is about 480Nm3 / h, with different modes and stages, the set value step increases, and the maximum oxygen consumption set value is above 16000 Nm3 / h. The process requires that the pressure sent from the external main pipe of oxygen be steadily reduced from 2.3MPa to and maintained at about 1.2MPa. [0003] At present, the method of r...

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Application Information

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IPC IPC(8): C21C5/52F27D19/00
CPCY02P10/20
Inventor 陆军范卫锋
Owner ANHUI MA STEEL AUTOMATION INFORMATION TECH
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