Chlorination furnace for preparing TiCl4 (titanium tetrachloride) and furnace temperature control method thereof

Abstract

The invention discloses a chlorination furnace for preparing TiCl4 (titanium tetrachloride) and a furnace temperature control method thereof, belongs to the technical field of design and manufacturingof auxiliary equipment in metallurgical production, and provides a chlorination furnace for preparing TiCl4 by high-temperature carbonizing and low-temperature selective chlorination via adding TiCl4sludge to effectively control temperature at reaction section, and a furnace temperature control method for the chlorination furnace. The chlorination furnace comprises a chlorination furnace body and a sludge returning temperature control device; the reaction temperature in the chlorination furnace body is controlled by the temperature-control TiCl4 sludge inputted by the sludge returning temperature control device. The furnace temperature control method comprises the following steps of when the temperature of the reaction section in the chlorination furnace exceeds 650 DEG C, enabling the sludge returning temperature control device to input the low-temperature TiCl4 sludge to reduce temperature; when the temperature of the reaction section in the chlorination furnace is reduced to be lower than 650 DEG C, stopping inputting the low-temperature TiCl4 sludge to prevent the further reducing of furnace temperature.

Description

technical field [0001] The invention relates to a chlorination furnace, in particular to a high-temperature carbonization-low temperature selective chlorination to prepare TiCl 4 The chlorination furnace belongs to the technical field of design and manufacture of auxiliary equipment for metallurgical production. The present invention also relates to a furnace temperature control method for the chlorination furnace. Background technique [0002] At present, the extraction and recovery of titanium resources in titanium-containing blast furnace slag in Panxi area mainly adopts "high temperature carbonization of blast furnace slag - low temperature selective chlorination to produce TiCl". 4 "Process. Among them, low-temperature selective chlorination is the key technology to ensure the selective chlorination of titanium elements. The system reaction temperature must be controlled within a certain temperature range. Therefore, taking away the excess heat in the chlorination furn...

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Problems solved by technology

The patent document with the publication number CN201510602878 passes liquid TiCl to the bottom of the reaction section of the low temperature boiling chlorination furnace 4 , in order to control the temperature of the reaction section within the predetermined temperature range, and because the bottom of the chlorination furnace is subject to the greater gravity and pressure of the bed particles, it is not conducive to the pipeline transportation of liquid TiCl 4 into the furnace

The patent document with the publication number CN201510613653 proposes a quantitative and continuous method for returning dry and cooling titanium tailings to the chlorination furnace to control the furnace temperature, but the addition of titanium tailings increases the amount of slag discharge and reduces the The actual use volume of the chlorination furnace is not conducive to the improvement of production capacity

Publication number is that the patent document of CN00252776.6 proposes a kind of titanium tetrachloride returning mud device used in the molten salt chlorination furnace, because molten state material is in the molten salt chlorination furnace, after the titanium tetrachloride mud is added, mixing is more difficult. Uniform, while the low-temperature chlorination furnace contains solid particles, and the titanium tetrachloride slurry contacts and exchanges heat with the solid particles. In order to reduce the temperature in the furnace, the local slurry is added in a large amount. It will form agglomerates, affect the fluidization state, and move to the bottom of the furnace to form sintered scars

Since the titanium tetrachloride slurry contains some solids, it is not suitable to be transported to the chlorination furnace with a spray device

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