Ammonium metavanadate dewatering system and ammonia-rich dewatering method of ammonium metavanadate

Abstract

The invention provides an ammonium metavanadate dewatering system and an ammonia-rich dewatering method of ammonium metavanadate, and belongs to the technical field of metallurgy. The ammonium metavanadate dewatering system comprises an arch furnace body, a water tank and a condenser. The dewatering method comprises the following steps of making industrial ammonium metavanadate into the shape of round flat cakes or granules; performing sealed heating in the dewatering furnace under ammonia-enriched environment, wherein the drying temperature is controlled to the 120-160 DEG C; collecting ammonia and vapor generated in the dewatering furnace, separating the ammonia from the vapor in a condensing manner, and anew transporting the separated ammonia back to the dewatering furnace; and performing continuous dewatering until dewatering requirements are met, stopping heating the dewatering furnace, and continuing performing reflux of the ammonia until the temperature in the dewatering furnaceis reduced to 50-80 DEG C, so that dewatering is completed. The ammonium metavanadate dewatering system and the ammonia-rich dewatering method of ammonium metavanadate disclosed by the invention havethe advantages of reducing ammonia treatment difficulty, improving dewatering efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to an ammonium metavanadate dehydration system and an ammonia-rich dehydration method of ammonium metavanadate. Background technique [0002] The water content of the industrial ammonium metavanadate filter cake is between 30% and 40% (mass ratio), which needs to be dehydrated, then crushed into powder and then calcined to form vanadium pentoxide. Ammonium metavanadate is a A kind of thermosensitive substance, promptly begins to decompose at about 135 degrees centigrade, and decomposition produces ammonia gas in vacuum environment, and prior art carries out dehydration process to industrial ammonium metavanadate filter cake, in order to avoid causing the decomposition of ammonium metavanadate and produce ammonia gas ( After the ammonia gas is produced, the ammonia gas needs to be collected and processed to avoid ammonia pollution), all of which are dried in an environment between 8...

AI Technical Summary

Problems solved by technology

[0002] The water content of the industrial ammonium metavanadate filter cake is between 30% and 40% (mass ratio), which needs to be dehydrated, then crushed into powder and then calcined to form vanadium pentoxide. Ammonium metavanadate is a A kind of thermosensitive substance, promptly begins to decompose at about 135 degrees centigrade, and decomposition produces ammonia gas in vacuum environment, and prior art carries out dehydration process to industrial ammonium metavanadate filter cake, in order to avoid causing the decomposition of ammonium metavanadate and produce ammonia gas ( After the ammonia gas is produced, the ammonia gas needs to be collected and processed to avoid ammonia pollution), all of which are dried in an environment between 80 and 100 degrees Celsius, which not only has low dehydration efficiency, but also requires ammonium metavanadate to be powdered. Capable of meeting dehydration requirements

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