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Method for preparing rutile titanium dioxide from new process titanium slag

A rutile titanium dioxide and process technology, which is used in the removal of titanium dioxide, solid waste, titanium oxide/hydroxide, etc., can solve the problems of low acid hydrolysis rate, difficult crystal structure, quality limitation of titanium dioxide, etc., to reduce production. cost, the effect of improving utilization

Active Publication Date: 2010-12-01
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, directly using the new process titanium slag as raw material to prepare titanium dioxide, and using the usual titanium dioxide process for production, it is difficult to complete acidolysis due to the special crystal structure, and the acidolysis rate is low, while the titanium solution obtained by acidolysis is due to impurities in it. The content is high, often produces jelly, which makes the production process difficult to continue, and the quality of the produced titanium dioxide is limited, and can only be used as low-quality titanium dioxide. For example, in 1989, the Beijing Nonferrous Research Institute produced anatase titanium in the laboratory. White powder, while the industry can only get non-pigment titanium dioxide as welding rod
So far, no report has been found on the preparation of high-quality rutile titanium dioxide using the new process titanium slag

Method used

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  • Method for preparing rutile titanium dioxide from new process titanium slag
  • Method for preparing rutile titanium dioxide from new process titanium slag
  • Method for preparing rutile titanium dioxide from new process titanium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Take 1000g of titanium slag of the new process that is crushed to a particle size greater than 45 microns and the particle ratio is less than 15% (see Table 2 for the composition), put 1683 grams of 98% concentrated sulfuric acid into a 5000mL beaker according to the acid ore mass ratio of 1.65, and then add it while stirring Titanium slag powder, then add 1 gram of Sb2O and mix evenly, add 35g of water to adjust the reaction acid concentration to 96%; then heat up while stirring, when the temperature rises to 150°C, stop heating, the reaction will proceed spontaneously, and finally form For the solid mixed phase, place it at 200°C for aging for 4 hours, add 2500mL of water for leaching, and maintain the leaching temperature at 70°C for 2 hours.

[0053] After the leaching is completed, add 2 grams of FeS first, then add 15 ppm flocculant formaldehyde dimethyl ammonium modified polyacrylamide (same as Comparative Example 1) for sedimentation, filter and separate to obtai...

Embodiment 2

[0057] Get new process titanium slag powder 1000g (composition is shown in Table 2), other is with embodiment 1, prepares the rutile titanium dioxide finished product 490g of the various performances that quality reaches application requirements, and the yield of titanium dioxide in the new process titanium slag is 86%, Pigment properties are shown in attached table 3.

[0058] As can be seen from Table 3, for the present embodiment, the chromium, vanadium, and aluminum contents are higher than that of Example 1, which has a relatively large influence on the pigment performance of the product, and the resulting pigment performance is slightly worse than that of Example 1.

Embodiment 3

[0060] Get new flow process titanium slag powder 1000g (composition is shown in Table 2), other is with embodiment 1, prepares the rutile titanium dioxide finished product 510g of the various properties that quality reaches application requirements, and the yield of titanium dioxide in the new flow process titanium slag is 86%, Pigment properties are shown in attached table 3.

[0061] Find by table 3, to present embodiment, chromium, vanadium, aluminum content are higher than embodiment 2, bigger to the pigment performance influence of product, the pigment performance of gained is worse than embodiment 2, solid requires the chromium of new flow process titanium slag, The content of vanadium and aluminum impurities is as low as possible.

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Abstract

The invention discloses a method for preparing titanium dioxide from new process titanium slag, and belongs to the technical field of titanium dioxide production. The method comprises the following steps of: performing acidolysis reaction on the new process titanium slag and concentrated sulfuric acid under certain conditions; leaching, precipitating and filtering the mixture to obtain clear titanium liquid; adding an aluminum removing agent into the clear titanium liquid to recover aluminum by freezing crystallization; adding oxidized trivalent titanium serving as an oxidant into the clear titanium liquid and concentrating the mixture; hydrolyzing, filtering and washing the concentrate by using a process for adding crystal seeds; and bleaching, salting, calcining and post-processing the filter cake to prepare the rutile titanium dioxide which meets the application requirement. The method has the most noticeable characteristic that the rutile titanium dioxide which meets the application requirement is prepared from the new process titanium slag which has the disadvantages of various impurities and difficult acidolysis; and thus a new raw material for producing the titanium dioxide by a sulfuric acid method is developed, various valuable elements are recovered as much as possible, the utilization ratio of the resource is improved and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide, in particular to a method for preparing rutile titanium dioxide by utilizing a new process titanium slag, and belongs to the technical field of titanium dioxide production. Background technique [0002] Titanium dioxide scientific name titanium dioxide (TiO 2 ), is an important white pigment and porcelain glaze, widely used in metallurgy, coatings, plastics, papermaking, inks, synthetic fibers, rubber, welding electrodes, capacitors, electric porcelain, cosmetics, correction fluids, etc. There are two kinds of titanium dioxide products: rutile type (Rtile R type) and anatase type (Anatase A type). High hiding power and decolorizing power; anatase type has low relative density and poor light fastness. [0003] The production methods of titanium dioxide mainly include sulfuric acid method and chlorination method. Among them, the sulfuric acid method can be used to produce anatase and ru...

Claims

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Application Information

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IPC IPC(8): C01G23/053B09B3/00
Inventor 蔡平雄张声贵邓伯松林发蓉代堂军常键
Owner SICHUAN LOMON TITANIUM IND CO LTD
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