Ladle lifting hydraulic system using vacuum circulation degassing method

A technology of vacuum cycle degassing and hydraulic system, applied in the field of hydraulic system, can solve problems such as the need to excavate ladle jacking pits
CN101525680AInactive Publication Date: 2009-09-09BAOSTEEL ENG & TECH GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BAOSTEEL ENG & TECH GRP
Publication Date
2009-09-09
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a ladle lifting hydraulic system using a vacuum circulation degassing method. The system comprises at least one ladle lifting frame, a plurality of ladle lifting hydraulic cylinders, a hydraulic cylinder synchronous control module, a main pump, a ladle lifting and speed control module, a control pump, a pressure servo variable control module and a hydraulic line connected therebetween. The ladle lifting frame is movably fixed and connected with ladles; the hydraulic cylinder synchronous control module evenly distributes hydraulic oil output from the main pump to each ladle lifting hydraulic cylinder; the control pump is connected with the pressure servo variable control module by the ladle lifting and speed control module, the ladle lifting and speed control module controls the control pump to drive pilot oil of the pressure servo variable control module; and the pressure servo variable control module controls hydraulic flow and output direction of the main pump. The ladle lifting hydraulic system releases a ladle trolley and molten steel transport operation, does not need to dig a deep pit in a workshop, simplifies steel making process and accelerates cycle of ladles.
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Description

technical field

[0001] The invention relates to a hydraulic system in iron and steel production, in particular to a hydraulic system for lifting a steel ladle by a vacuum circulation degassing method (RH). Background technique

[0002] At present, the vacuum cycle degassing method (RH) in the iron and steel production process uses the principle of the air pump to first suck the molten steel into the vacuum chamber, and then blow argon into the molten steel on one side wall of the two immersion tubes. The argon expands rapidly under the action of the high temperature of molten steel and the low pressure of the upper part of the vacuum chamber, causing the density of the mixture of molten steel and gas to decrease continuously along the height direction of the immersion tube. Under the action of the pressure difference caused by the density difference, the The molten steel enters the vacuum chamber. The mixture of molten steel and gas entering the vacuum chamber releases gas ...

Claims

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