Standby preheating device and method for molten steel refining vacuum channel

The technology of a preheating device and a vacuum tank is applied in the field of molten steel refining, which can solve the problems of short service life of the vacuum tank, cumbersome operation and high cost, and achieve the effects of satisfying the requirements of preheating treatment, simple structure and easy operation.

Active Publication Date: 2009-10-14
BAOSTEEL ENG & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the vacuum tank in the standby position generally used electrodes or side burners for preheating, but this fixed position preheating method would make the heating temperature inside the vacuum tank uneven, and the preheating efficiency of the vacuum tank was low and the effect was 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 rate of combustion oxygen is 500Nm 3 / h, the primary interface pressure ...

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Abstract

The invention belongs to the technical field of molten steel refining, and specifically relates to a standby preheating method and device for a RH molten steel refining vacuum tank, which mainly consists of a preheating gun body, a preheating gun lifting, rotating and emergency lifting mechanism, an ignition device and a flame detection device, The integral combustion control valve station is composed of pipes and metal hose assemblies and a PLC automatic control system. The integral combustion control valve station is connected to the liftable and rotatable preheating gun through multiple metal hoses. On-site operation box for heat gun lifting, rotating, purging and ignition. The whole device is automatically detected and controlled by PLC. The device has the advantages of simple structure, easy operation, safety and reliability, 100% ignition hit rate, high efficiency and good effect on heating up and heat preservation preheating treatment of vacuum tank, and can fully meet the requirements of RH molten steel refining production for vacuum tank preheating treatment .

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 used electrodes or side burners for preheating, but this fixed position preheating method would make the heating temperature inside the vacuum tank uneven, and the preheating efficiency of the vacuum tank was low and the effect was 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...

Claims

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Application Information

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