Powder synthesis furnace and method based on low-temperature self-propagating combustion principle

Abstract

The invention relates to a powder synthesis furnace based on the low-temperature self-propagating combustion principle. The powder synthesis furnace comprises a middle shell, a plurality of combustionsynthesizers, a material falling hopper, an airflow conveyor, a powder separator, a primary powder collecting barrel and a secondary powder collecting barrel; the multiple combustion synthesizers areconnected with the middle shell, the material falling hopper is connected to the lower portion of the middle shell, and a containing cavity formed by the middle shell and the material falling hopperin a communication mode is an inner cavity of the synthesis furnace; and the material falling hopper, the airflow conveyor, the powder separator and the secondary powder collecting barrel are sequentially connected, the upper end of the powder separator communicates with the material falling hopper, and the primary powder collecting barrel is connected with the tail end of the airflow conveyor. The middle shell and the multiple combustion synthesizers installed on the periphery of the middle shell form a synthesizer unit. Through the powder synthesis furnace, the safety and controllability ofthe synthesis process are ensured, the production procedure is further simplified, production energy consumption is reduced, and the production efficiency is improved. The invention further relates toa powder synthesis method based on the low-temperature self-propagating combustion principle. Through the method, continuous stable low-temperature self-propagating combustion can be achieved.

Description

technical field [0001] The invention belongs to the field of ultrafine oxide powder synthesis, in particular to a powder synthesis furnace and a synthesis method based on the principle of low-temperature self-propagating combustion. Background technique [0002] Low-temperature self-propagating combustion synthesis is a common method for synthesizing ultrafine oxide powders. This method uses nitrate and water-soluble complexing agents (citric acid, glycine, stearic acid, ethylenediaminetetraacetic acid, etc.) As a raw material, superfine oxide powder with good dispersibility is obtained through the steps of solution preparation, evaporation concentration, gel formation, gel drying, ignition, and subsequent heat treatment. Among the published data on low-temperature self-propagating combustion synthetic oxide powders, most of them need to go through the process of gel formation and gel drying, and then initiate combustion of block or ground xerogels. The method of obtaining ...

AI Technical Summary

Problems solved by technology

Because the combustion of nitrate and organic matter is very violent, the gel in the crucible should not be too much, otherwise it will easily cause flames to spew out and cause a fire hazard

It is precisely because the self-propagating combustion reaction is difficult to control and is very dangerous, which leads to the low enthusiasm of researchers to use this method and the slow development of technology

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