Molybdenum crucible is a container for melting metals and alloys widely used in metallurgy, chemical industry, and rare earth manufacturing enterprises. In recent years, as the pollution caused by the use of traditional resources in my country has become more and more serious, the development of new green energy has become a top priority, which is more obvious in the production of monocrystalline silicon, polycrystalline silicon and sapphire. Silicon materials and new energy raw materials such as sapphire are realized at very high temperatures during the preparation process, so molybdenum tongs with high-temperature resistance are usually used. In the actual production process, when the traditional molybdenum crucible is used for metallurgical melting, in order to pour out a certain amount of solution, the site of the molten metal is usually taken out and dumped together. Since the temperature of steel and other smelting is above 1500 degrees Celsius, after the molybdenum crucible is taken out together with the melt, the cooling speed is very fast due to the large temperature difference inside and outside the furnace. Sometimes the liquid slurry is not completely poured out, and the remaining part is cooled and solidified Adhesion to molybdenum crucible, is difficult to clean.
Technical implementation elements:
In order to solve the deficiencies in the prior art, the utility model provides a molybdenum crucible with a simple structure, reliable operation, convenient discharging, and good sealing performance. In order to solve the above-mentioned technical problems, the present utility model adopts the following technical solutions: a molybdenum crucible, including a crucible body, a crucible cover, and a molybdenum plug rod, the crucible body is provided with a spherical inner cavity and the upper part is open, and the bottom center of the crucible body is provided with a discharge The upper part of the discharge hole is connected with the spherical inner cavity, and the discharge hole has a conical structure with a large upper and a small lower. An annular groove is formed on the upper surface of the crucible body. There is a plug port, and the molybdenum plug rod is slidably inserted into the crucible body along the axial direction. The molybdenum plug rod includes a rod body and a plug head fixedly connected to the lower end of the rod body.
The large and small tapered structure is matched with the taper of the discharge hole, and the upper end of the rod body passes through the plug rod mouth upward. A material guide hole is provided in the plug head along the axial direction, the lower end of the material guide hole is communicated with the outside world, and the side of the plug head is spaced apart with a second material guide hole in the circumferential direction. The material holes are connected, and the diameter of the material guide hole is larger than that of the second material guide hole.
The diameter of the second material guide hole located below the plug head is larger than that of the second material guide hole above it.
A sealing ring is arranged between the upper part of the rod body and the mouth of the plug rod.
The top of the crucible lid is symmetrically provided with a handle about the stopper rod.
The bottom surface of the crucible body is provided with a positioning ring, and the positioning ring and the discharge hole are arranged coaxially.
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