Method for preparing zirconium tetrachloride by zircon sand boiling chlorination method and zirconium tetrachloride

Abstract

The invention relates to a method for preparing zirconium tetrachloride by using a zircon sand boiling chlorination method, and prepared zirconium tetrachloride. The method comprises: (1) mixing various raw materials, and granulating; (2) placing the granulating material obtained in the step (1) in a boiling chlorination furnace reaction chamber, and carrying out a boiling chlorination reaction to obtain a reaction product, wherein the boiling chlorination furnace reaction chamber has a cone cylinder structure having gradually decreased diameter from bottom to top, and in the boiling chlorination reaction, chlorine gas is introduced from a bottom wind distribution plate, the granulating material is fed into the top portion of the boiling chlorination furnace reaction chamber in a screw feeding manner, and the material in the boiling chlorination furnace reaction chamber is controlled to remain in a boiling reaction state; and (3) separating the reaction product to obtain zirconium tetrachloride. According to the present invention, the method has advantages of high product purity, low chlorine gas consumption, less slag in the reaction process, good reaction stability and reduced overall process difficulty.

Description

technical field [0001] The invention relates to inorganic materials, in particular to a method for preparing zirconium tetrachloride by using a zircon sand boiling chlorination method and the prepared zirconium tetrachloride. Background technique [0002] Zirconium tetrachloride prepared by the chlorination method is an important intermediate product in the production of zirconium oxychloride and zirconium sponge. The existing industrial technologies for preparing zirconium tetrachloride mainly include carbonation and chlorination of zircon sand, chlorination of fused desiliconized zirconium dioxide and boiling chlorination of zircon sand. Among them, the zircon sand carbonization and chlorination method has been eliminated due to reasons such as high production cost and backward technology; the electric fusion desilication zirconia chlorination method uses desilication zirconia fine powder and carbon reducing agent to mix boiling chlorine Zirconium tetrachloride is prepare...

AI Technical Summary

Problems solved by technology

Among them, the zircon sand carbonization and chlorination method has been eliminated due to reasons such as high production cost and backward technology; the electric fusion desilication zirconia chlorination method uses desilication zirconia fine powder and carbon reducing agent to mix boiling chlorine Zirconium tetrachloride is prepared by chemical reaction, which has the advantage that the reaction can be carried out at a lower temperature, and the equipment requirements are not too strict, but the price of raw material fused zirconia is relatively high. This method is currently the most mature and widely used production process; The zircon sand boiling chlorination method uses zircon sand as raw material, and chlorine gas is introduced into the fluidized bed reactor to generate silicon tetrachloride and zirconium tetrachloride. This method uses cheap zircon sand as raw material and has a market The valuable silicon tetrachloride greatly reduces the production cost of zirconium tetrachloride, which has a great cost advantage, but the boiling chlorination of zircon sand needs to be reacted at a higher temperature, which requires strict equipment and materials. high technical difficulty