Method for preparing rutile titanium dioxide from new process titanium slag

A technology of rutile titanium dioxide and process, applied in the direction of titanium dioxide, solid waste removal, titanium oxide/hydroxide, etc., can solve the problems of low acidolysis rate, difficult crystal structure, quality limitation of titanium dioxide, etc., to reduce production Cost, the effect of improving the utilization rate

Active Publication Date: 2012-10-03
SICHUAN LOMON TITANIUM IND CO LTD
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  • 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 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 obtain clear titanium solution, add 150 g of ammonium sulfate, and cool the solution to 12 °C Crystallize for 1 hour, filter and separate to obtain about 450g of aluminum ammonium sulfate and titanium solution, and recover the obtained aluminum ammonium sulfate; add 150g of sodium nitrite to the obtained titanium solution to oxidize trivalent titanium to 2g / L, and concentrate to obtain a concentration of 200g / L 2 liters of concentrated titanium solution.

[0053] Adding additional seed crystal titanium tetrachloride to the obtained concentrated titanium solution for hydrolysis, the quality of the added titanium tetrachloride is 2% of the mass of titanium dioxide in the concentrated titanium solution, the hydrolysis temperature is 90-95 °C, and the initial reac...

Embodiment 2

[0057] 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.

[0058] Example 3

Embodiment 3

[0060] Find by table 3, to present embodiment, chromium, vanadium, aluminum content are higher than embodiment 2, and the pigment property influence of product is bigger, and the pigment property of gained is worse than embodiment 2, and the chromium of solid requirement new flow process titanium slag, The content of vanadium and aluminum impurities is as low as possible.

[0061] Example 4

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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 dioxideby 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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Patent Type & Authority Patents(China)
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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