Magnesium-silicide spiral cooling device

Abstract

The invention discloses a magnesium-silicide spiral cooling device. The magnesium-silicide spiral cooling device comprises a motor, a cooler and a spiral propeller arranged in the cooler, wherein the spiral propeller mainly comprises a hollow shaft and spiral blades arranged on the hollow shaft; a cooling water introduction pipe is arranged in the hollow shaft; a cooling water return channel is formed in a gap between the inner wall of the hollow shaft and the outer wall of the cooling water introduction pipe; the first end of the cooling water return channel is connected with a cooling waterdelivery pipe; and a front end cylinder, a multi-level cooling water jacket and a tail end cylinder are arranged outside the cooler from the second end to the first end of the cooler in turn. The magnesium-silicide spiral cooling device has the advantages that: due to the combination of the spiral propeller and the cooler, continuous cooling of high-temperature magnesium silicide powder can be realized, and continuous synthesis of magnesium silicide is facilitated; and the high-temperature magnesium silicide powder moves forward with the turnover of the spiral propeller, and therefore the heat transfer is enhanced, the cooling of the magnesium silicide powder is uniform, the cooling rate is stable and a mild expansion condition is provided so as to ensure the reaction activity of the magnesium silicide and prevent the cooled magnesium silicide from caking.

Description

technical field [0001] The invention relates to a cooling device for cooling high-temperature magnesium silicide, in particular to a spiral cooling device for magnesium silicide. Background technique [0002] Magnesium silicide is an important industrial raw material, which is widely used in the preparation of silane gas, polysilicon, amorphous silicon film, ceramic materials and silicon-containing nano-powder, etc. important role. The development of high-efficiency, high-quality and low-energy industrial synthesis technology is the development direction of magnesium silicide technology. [0003] In the process of preparing magnesium silicide, the silicon-magnesium reaction is a strong exothermic reaction, and the temperature of the generated magnesium silicide is about 500°C. In order to facilitate subsequent processing, it needs to be cooled. The traditional batch reaction production method is to cool the reactor naturally after the silicon-magnesium reaction is complete...

AI Technical Summary

Problems solved by technology

The traditional batch reaction production method is to cool the reactor naturally after the silicon-magnesium reaction, so as to achieve the purpose of cooling magnesium silicide, but the cooling efficiency of this cooling method is very low

Images