A method for rapid recovery of condensate in smelting chamber of electron beam cooling bed furnace

Abstract

The invention discloses a method for rapidly recycling condensates in an electron beam cooling bed furnace. The method comprises the following steps: after completion of cast ingot smelting in the furnace, decreasing the final cast ingot to the station of an ingot puller of the electron beam cooling bed furnace, turning off the isolating valve of a smelting chamber and an ingot pulling chamber, the isolating valve of a vibrating feeding hole and the smelting chamber, the lift valve of a diffusion pump unit, a booster pump and a holding pump bypass-valve to enable the entire smelting chamber to be in the isolated seal state; then, filling argon in the smelting chamber until the air pressure in the smelting chamber to be consistent with the barometric pressure; connecting a refrigerating machine with the smelting chamber, starting the refrigerating machine to cool the indoor temperature, after cooling, turning off the refrigerating machine and the valve of the refrigerating machine and the smelting chamber; finally, loosening the furnace door bolt of the smelting chamber, opening the furnace lid of the smelting chamber, and starting an axial draught fan to blow argon in the smelting chamber out so as to recycle the condensates. With adoption of the method, temperature in the furnace hearth can be rapidly decreased to the required temperature, and the condensates in the furnace can be rapidly recycled without affecting the production cycle.

Description

technical field [0001] The invention relates to the technical field of a method for recovering condensate in a smelting chamber of an electron beam cooling hearth furnace. Background technique [0002] Titanium alloys are widely used because of their low density, high specific strength, high temperature resistance, corrosion resistance, good mechanical properties and process properties. However, titanium alloy ingots smelted by traditional methods often have defects such as excessively large grains, composition segregation, holes, cracks, high-density inclusions and low-density inclusions, and the appearance of these defects will make the subsequently prepared parts in use. Fatigue occurs. In order to improve its service life, it is necessary to produce high-quality and clean titanium alloy materials. [0003] Electron beam cooling bed smelting technology is a metallurgical technology that combines electron beams with cooling bed and smelts under high vacuum conditions. T...

AI Technical Summary

Problems solved by technology

However, in the existing direct recycling operation, the electron beam smelting furnace needs to be cooled naturally for a long time before the furnace is turned on. Since the furnace is in a vacuum state, the heat in the furnace cannot be diffused, and the furnace temperature is relatively high when the furnace is turned on, and the ignition point is low. After the substance comes into contact with air, it is easy to ignite and burn, and then ignites the volatiles deposited in a layered loose structure. The combustion of volatiles will not only cause damage to the personal and equipment safety of the operator, but also greatly reduce the quality of the condensate. Reduced recovery value of condensate