Method for recovering hafnium tetrachloride in crude zirconium tetrachloride purification process

Abstract

The invention provides a method for recovering hafnium tetrachloride in a crude zirconium tetrachloride purification process. The invention provides a preparation device for the recovery method. The device comprises a rectifying tower; a steam inlet is formed in the lower right side of the rectifying tower; a fourth rail plate is fixedly connected to the rear side of a material containing plate; fourth moving plates are slidably connected to the inner side of the fourth rail plate; first connecting rods are rotatably connected to the front sides of the fourth moving plates; and first fixing shafts are rotatably connected to the lower sides of the first connecting rods. According to the method for recovering hafnium tetrachloride in the crude zirconium tetrachloride purification process ofthe invention, the first connecting rod on the left side is driven to rotate through engagement of the first connecting rods, so that the fourth moving plates are opened outwards, then hafnium tetrachloride on the material containing plate is pushed into a round hole in the material containing plate, and therefore collection is conducted. With such a structure adopted, hafnium tetrachloride is easy to collect, the recovery efficiency of the hafnium tetrachloride is high, the hafnium tetrachloride can be collected regularly, and the recovery rate of the hafnium tetrachloride can be calculated.

Description

technical field [0001] The invention relates to the technical field of hafnium tetrachloride recovery, in particular to a method for recovering hafnium tetrachloride during the purification process of crude zirconium tetrachloride. Background technique [0002] Zirconium tetrachloride is a white shiny crystal or powder, which is often accompanied by the formation of hafnium tetrachloride in the process of purifying zirconium tetrachloride, so in the process of purifying zirconium tetrachloride, it is necessary to Hafnium is recovered, so a recovery device for hafnium tetrachloride was born accordingly. [0003] At present, most hafnium tetrachloride recovery devices on the market mainly use the difference in saturated vapor pressure of HfCl4 and ZrCl4 in the molten salt to separate in the rectification tower, but the molten salt cannot circulate in the rectification tower. As a result, a large amount of molten salt is consumed, which increases the recovery cost, and the col...

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Problems solved by technology

[0003] At present, most hafnium tetrachloride recovery devices on the market mainly use the difference in saturated vapor pressure of HfCl4 and ZrCl4 in the molten salt to separate in the rectification tower, but the molten salt cannot circulate in the rectification tower. As a result, a large amount of molten salt is consumed, which increases the recovery cost, and the collection of hafnium tetrachloride is very cumbersome, the recovery time is long, and ha

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