Boiling chlorination furnace for preparing titanium tetrachloride by using fine-graded artificial rutile

Abstract

The invention discloses a boiling chlorination furnace for preparing titanium tetrachloride by using fine-graded artificial rutile, which comprises a boiling chlorination reactor, a chlorine pre-distributor, a chlorine distributor and a boiling chlorination furnace roof, wherein a chlorine inlet capable of introducing gas in a tangential direction is arranged on the chlorine pre-distributor. The chlorine distributor is an inverted truncated cone cylinder, the upper end of the truncated cone cylinder is opened, the included angle of a truncated cone bus and the axis is 30-45 DEG; several small holes are uniformly arranged on the wall of the chlorine distributor, each small hole is tangent to the outer wall of the chlorine distributor, and the tangential direction of the small hole is similar with the tangential direction of the chlorine inlet. A filling tube which enters from the center of the furnace roof is arranged at the boiling chlorination furnace roof, the upper part of the filling tube is connected to a material sending pot, the lower end of the filling tube is a horn-shaped diffusion outlet, and the lower edge of the outlet has same height as a material returning inlet. According to the invention, overflow of the fine-graded artificial rutile can be avoided, the fine-graded artificial rutile is dispersed and suspended in chlorine flow, so that the chlorination reaction efficiency can be greatly increased.

Description

Technical field [0001] The present invention involves the technology of high titanium residue to prepare tetrachloride, and specially involves the use of fine -grained high -titanium residue mineral preparation of tetrachloride boiling chloride, which belongs to the field of tetrachloride preparation technology. [0002] Background technique [0003] Titanium titanium (ticl 4 ) It is an important intermediate product of the titanium industry. It is mainly used to produce two major industries: cavernous titanium and gas oxidation method.Boiling chloride is a chloride response that high titanium residue and petroleum focus mixture in the boiling furnace and chlorine in the boiling furnace, and have become the mainstream technology to produce titanium titanium chloride in the country.Because the calcium and magnesium oxides in the raw materials are prone to generate low -molten melting and high boiling points during chloride 2 And MGCL 2 , Production in boiling chlorine chloride 4 U...

AI Technical Summary

Problems solved by technology

However, after removing impurities such as calcium and magnesium, the artificial rutile whose components meet the requirements is obtained. Compared with the titanium-rich materials used in the existing boiling chlorination process, the artificial rutile has a finer particle size (fine particles smaller than 0.048mm account for more than 60%) , and with many micropores and low apparent density, using the existing boiling chlorination process and equipment will inevitably lead to a large amount of overflow of this fine-grained artificial rutile, and the deterioration of technical and economic indicators.

But from the perspective of kinetics of gas-solid interface reaction, the finer the particle size, the larger the specific surface area per unit weight of ore powder, the better the kinetic conditions of the chlorination reaction, which is conducive to improving the rate of chlorination reaction; from gas-solid fluidization From the process point of view, if the particle size is too fine, it is difficult to establish a good fluidization state, channeling and surging are easy to occur, resulting in poor gas-solid contact and insufficient dynamic conditions.

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