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Vacuum deaeration refining process and equipment

A vacuum degassing and equipment technology, applied in the field of RH cycle degassing and refining, can solve the problems of inconvenient operation and maintenance, difficult to realize, complex system, etc., and achieve the effect of not easy to splash

Inactive Publication Date: 2004-12-22
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is that it is necessary to make major changes to the existing equipment, which is not easy to realize; the other is that the system is complicated, the investment is large and the operation and maintenance are inconvenient

Method used

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  • Vacuum deaeration refining process and equipment
  • Vacuum deaeration refining process and equipment
  • Vacuum deaeration refining process and equipment

Examples

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Embodiment Construction

[0023] Such as Figure 4 As shown, the magnetic field generator is composed of an iron core 7 and a coil winding 8 , and the outside of the generator is wrapped by a casing 9 . The iron core 7 and the coil winding 8 can be made of planar ferromagnetic materials. The iron core 7 is made of silicon steel sheets and is divided into upper and lower layers. There are two D-shaped tubes 10 on both sides, forming four parallel water branches for cooling by water. The coil winding 8 is made of flat copper strip and is directly cooled by water. The housing 9 is made of double-layer non-magnetic stainless steel with water cooling in the middle. The inner cavity of the shell is filled with dry nitrogen with a pressure slightly higher than the atmospheric pressure to prevent water vapor from infiltrating and ensure the insulation of the copper tube winding.

[0024] exist Figure 5 , 6 In and 7, the RH cycle degassing refining equipment consists of a vacuum chamber 1, a ladle 2, an a...

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Abstract

The present invention provides one kind of vacuum deaeration refining process and equipment. Soaking pipes in the bottom of the vacuum chamber are inserted into molten steel inside the molten steel container, driving gas is introduced into the ascending soaking pipe and the molten steel flows from the molten steel container, through the ascending soaking pipe, the vacuum chamber and the descending soaking pipe before returning to the molten steel container circular. The present invention features that there is magnetic field generator installed outside at least one soaking pipe to produce electromagnetic force in the same direction to that of the circular molten steel and this results in increased circulating molten steel amount and high refining efficiency.

Description

technical field [0001] The invention relates to a vacuum degassing method and equipment, in particular to a method and equipment which can be used for RH cycle degassing and refining. Background technique [0002] For the traditional converter continuous casting process, refining determines the added value and quality of the final product, which requires a lot of molten steel to go through RH (RH is the abbreviation of vacuum cycle degassing, which is the Rheinstahl-Heraeus company who invented this method. abbreviation) processing. As the market has greatly improved product quality requirements, the composition, size, shape, quantity and distribution of inclusions in steel must be strictly controlled during refining. The RH vacuum degassing device is the most critical equipment to achieve these goals, so that the demand for RH treatment is gradually increasing, and it has gradually become the bottleneck of the converter continuous casting process. In the RH unit, the vacu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/10
Inventor 张永杰冯长宝赫冀成
Owner BAOSHAN IRON & STEEL CO LTD
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