Process method for producing zirconium tetrachloride through fluidizing chlorination method

Abstract

The invention relates to a process method for producing zirconium tetrachloride through a fluidizing chlorination method. The process method comprises the following steps: smashing zircon sand to 300-325 meshes, smashing petroleum coke to 100-200 meshes, smashing chemical heat supplementing agent to 200-400 meshes, firstly fully mixing the zircon sand and the petroleum coke powder, simultaneously adding the mixture and the heat supplementing agent into a fluidizing chlorination furnace, introducing chlorine to carry out chlorination reaction and keeping the temperature of the fluidizing chlorination furnace at 1100 DEG C, wherein the chemical heat supplementing agent is silica powder or silicon carbide or a mixture of the silica powder and the silicon carbide; the reaction formula of the chemical heat supplementing agent is SiC+2Cl2=SiCl4+C or Si+2Cl2=SiCl4; the main reaction formula of producing the zirconium tetrachloride through zircon sand chlorination is ZrSiO4+4C+4Cl2=ZrCl4+SiCl4+4CO. According to the method disclosed by the invention, the heating problem of a zircon sand fluidizing chlorination furnace can be solved, the production cost of the zirconium tetrachloride is reduced and a byproduct: an important chemical raw material silicon tetrachloride can be produced, so that the process method has the advantages of increasing the working efficiency, saving the energy and reducing the production cost.

Description

technical field [0001] The invention relates to a process method, which is especially suitable for producing zirconium tetrachloride by using zircon sand as the main raw material and adopting boiling chlorination method. Background technique [0002] At present, the chlorination furnaces that produce zirconium tetrachloride by boiling chlorination both at home and abroad use graphite cylinders inside the chlorination furnace, and use intermediate frequency or power frequency coils outside the chlorination furnace to heat the graphite cylinder in the chlorination furnace. It is used to supplement the reaction heat required for the chlorination reaction. Although this method is simple to control, the graphite cylinder is consumed quickly and the replacement cost is high. During production, the graphite cylinder is frequently stopped to replace the graphite cylinder. The diameter of the boiling chlorination furnace cannot be enlarged, which limits the capacity of a single furnac...

AI Technical Summary

Problems solved by technology

[0002] At present, the chlorination furnaces that produce zirconium tetrachloride by boiling chlorination both at home and abroad use graphite cylinders inside the chlorination furnace, and use intermediate frequency or power frequency coils outside the chlorination furnace to heat the graphite cylinder in the chlorination furnace. It is used to supplement the reaction heat required for the chlorination reaction.