Barrel-shaped tungsten crucible

Abstract

Barrel-shaped tungsten crucible, including a barrel-shaped crucible body and a bushing inside the crucible body. There is a gap between the outer wall of the bushing and the inner wall of the crucible body. The bottom surface of the bushing is above the bottom surface of the crucible body. There are at least two notches, the angles between two adjacent notches are the same, and the depth of each notch is the same. The bushing has a barrel-shaped structure, and the upper part of the outer wall of the bushing is fixedly connected with supporting rods corresponding to the notches. Corresponding clamps are set in the gap, the ends of the support rods protrude out of the gap, vent holes are spaced apart on the side wall of the bushing, and blanking holes are spaced apart at the bottom of the bushing. The invention has the advantages of simple structure, stable operation, convenient maintenance and replacement, long service life and uniform temperature distribution.

Description

technical field [0001] The invention belongs to the technical field of crucibles, in particular to a barrel-shaped tungsten crucible. Background technique [0002] Tungsten crucible is one of metal tungsten products. Because of its high melting point and boiling point, good high temperature strength, wear resistance and corrosion resistance, high thermal conductivity, small thermal expansion coefficient and good hardenability, tungsten crucible is widely used in rare earth smelting, quartz glass, In industries such as electronic spraying and crystal growth, the working temperature environment used is generally above 2000°C. Most of the existing tungsten crucibles have a barrel-shaped structure. In actual use, the raw materials to be melted are often put directly into the tungsten crucible, and then put into a high-temperature furnace for metallurgical melting. The raw materials are directly stacked in the tungsten crucible and The inner wall of the tungsten crucible is in d...

AI Technical Summary

Problems solved by technology

Most of the existing tungsten crucibles have a barrel-shaped structure. In actual use, the raw materials to be melted are often put directly into the tungsten crucible, and then put into a high-temperature furnace for metallurgical melting. The raw materials are directly stacked in the tungsten crucible and The inner wall of the tungsten crucible is in direct contact, and the bottom of the tungsten crucible directly bears the weight of the raw materials. Under high temperature conditions, since the raw materials at the bottom of the tungsten crucible melt first, and the raw materials at the upper part melt last, the bottom of the tungsten crucible is more corroded. Large, with the increase of smelting time and times, the bottom of the tungsten crucible will become thinner, so that in the process of smelting, the tungsten crucible may not be able to withstand the pressure and break, causing losses. The whole tungsten crucible cannot be used, and the raw materials are directly stacked in the tungsten crucible, and its temperature distribution is uneven, which will cause different thermal stresses in each part of the tungsten crucible, which will easily cause large local deformation and reduce the service life of the tungsten crucible.

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