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Standby preheating device and method for molten steel refining vacuum channel

A technology of preheating device and vacuum tank, which is applied in the field of molten steel refining, can solve the problems of short service life of vacuum tank, cumbersome operation and high cost, and achieve the effect of meeting the requirements of preheating treatment, simple operation and simple structure

Active Publication Date: 2007-01-24
BAOSTEEL ENG & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the vacuum tank in the standby position generally adopts the electrode or side burner method for preheating, but this fixed position preheating method will make the heating temperature inside the vacuum tank uneven, and the preheating efficiency of the vacuum tank is low and the effect is poor. And cause the service life of the vacuum tank to be short
Products with the same function imported from abroad have high cost, complex structure, cumbersome operation, low ignition hit rate, and low safety performance

Method used

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  • Standby preheating device and method for molten steel refining vacuum channel
  • Standby preheating device and method for molten steel refining vacuum channel
  • Standby preheating device and method for molten steel refining vacuum channel

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Embodiment Construction

[0014] Below are two typical process schemes of the present invention.

[0015] The first is the 150-ton RH molten steel refining vacuum tank standby preheating device using natural gas as the gas, as attached figure 2 As shown, the main process design data are as follows: the preheating rate of vacuum tank 5 is 50°C / hour, and the maximum heating temperature is 1200°C; the maximum lifting stroke of preheating gun 1 is 10 meters; the maximum flow rate of natural gas is 400Nm 3 / h, the working pressure is 10kPa, the main gas piping of the valve station and the gas piping of the preheating gun are both DN80; the bypass ignition natural gas flow rate is 20Nm 3 / h, the bypass piping is DN20; the maximum flow of combustion air is 2000Nm 3 / h, the working pressure is 6.0kPa, the combustion air piping of the valve station is DN200, and the combustion air piping of the preheating gun is DN150. The maximum flow of combustion-supporting oxygen is 500Nm 3 / h, the primary interface pre...

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Abstract

The present invention belongs to the field of molten steel refining technology, and is especially RH molten steel refining vacuum tank standby preheating method and apparatus. The apparatus consists of preheating gun, preheating gun elevating and rotating mechanism, igniting and flame detecting mechanism, integral combustion controlling valve station, pipeline and metal hose assembly, and PLC automatic control system. The apparatus has simple structure, convenient operation, high safety and reliability, high ignition hit rate up to 100 % and high preheating efficiency, and can meet the requirement of RH molten steel refining on vacuum tank preheating.

Description

technical field [0001] The invention belongs to the technical field of molten steel refining, and in particular relates to a device and method for preheating a vacuum tank at a stand-by position in a molten steel vacuum refining (RH) system. Background technique [0002] During production, the RH molten steel vacuum refining system needs to heat up or heat-preserve and preheat the vacuum tank at the standby position to ensure that the vacuum tank has a certain temperature when it is used for vacuum refining of molten steel. In the past, the vacuum tank in the standby position generally adopts the electrode or side burner method for preheating, but this fixed position preheating method will make the heating temperature inside the vacuum tank uneven, and the preheating efficiency of the vacuum tank is low and the effect is poor. And cause the service life of the vacuum tank to be short. Products with the same function imported from abroad have high cost, complex structure, cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/10
Inventor 吴杰吴坚华
Owner BAOSTEEL ENG & TECH GRP
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