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Control method for ensuring ultralow vacuum degree of RH furnace

A control method and technology of vacuum degree, applied in the field of iron and steel metallurgy, can solve the problems of low degree of vacuum, the degree of vacuum can not meet the process requirements, etc., to meet the requirements of process production, solve the factors of unstable degree of vacuum, research and development and product quality The effect of stability assurance

Inactive Publication Date: 2018-11-13
SHANDONG IRON & STEEL CO LTD
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  • Description
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Problems solved by technology

The invention formulates specific measures to prevent the vacuum degree in the production process from failing to meet the process requirements, effectively solves the problem of low vacuum degree, satisfies the process production requirements, and lays a solid foundation for the development of high-quality steel grades in RH furnaces and the stability of product quality. Base

Method used

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Embodiment Construction

[0059] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. Unless expressly stated otherwise, each feature is only one example of a series of equivalent or similar features. The description is only to help the understanding of the present invention, and should not be regarded as a specific limitation on the present invention.

[0060] The present invention will be further described below through specific implementation examples.

[0061] Embodiments of the present invention, firstly, the impact of energy medium including steam, nitrogen, argon, turbid ring water, and water level of the accumulator on the vacuum degree of the vacuum system should be considered in the first place, and its influence on the vacuum degree is intuitive and easy to check. Second, the airtightness of the vacuum system of the RH furnace mainly considers four aspects, the airtightness of the...

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Abstract

The invention discloses a control method for ensuring the ultralow vacuum degree of an RH furnace. The control method adopts a vacuum control system energy medium parameter group (including steam related parameters, condenser turbid circulating water, heat accumulator water level and protective gas flow), vacuum system equipment sealing performance and a vacuum pump steam inner leakage technology,and it is ensured that the limiting vacuum degree of the RH vacuum furnace is controlled to be within 20 pa. The factor of unstable vacuum degree is effectively solved, the process production requirement is met, and powerful guarantee is provided for research and development of high-quality steel of the RH furnace and the product quality stability.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a control method for ensuring the ultra-low vacuum degree of an RH furnace. Background technique [0002] With the continuous expansion of the use of steel at home and abroad, the demand for steel with special performance requirements has increased rapidly. Many of the product series have extremely strict requirements on hydrogen, nitrogen, carbon and other elements. At present, domestic control of raw material moisture, bottom blowing gas source improvement, and new technology methods are used to control, but when extremely low content of hydrogen, nitrogen, and carbon are required At home and abroad, vacuum furnaces such as RH and VD are used for forced dehydrogenation, nitrogen, and carbon elements, and obvious smelting effects have been achieved. However, as an important influencing parameter, the vacuum degree is difficult to control and involves many in...

Claims

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Application Information

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IPC IPC(8): C21C7/10
Inventor 韩蕾蕾
Owner SHANDONG IRON & STEEL CO LTD