Method for preparing titanium pigment from novel-process-flow titanium slag and titanium concentrated ore through mixed acidolysis

A titanium concentrate and process technology, which is applied in the field of titanium dioxide preparation, can solve the problems of difficult continuous production process, limited quality of titanium dioxide, and difficulty in large-scale production, and achieves the effects of saving consumption, low price, and saving iron powder

Active Publication Date: 2012-07-04
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, due to the high content of impurities, not only the production process is difficult to carry out continuously, it is difficult to produce large-scale production, and the quality of the produced titanium dioxide is limited, so it can only be used as low-quality titanium dioxide. For example, in 1989, Beijing Nonferrous Research Institute produced anatase titanium dioxide in the laboratory, but the industry can only obtain 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 titanium pigment from novel-process-flow titanium slag and titanium concentrated ore through mixed acidolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put 1683 grams of 98% concentrated sulfuric acid into a 5000mL beaker according to the acid ore ratio of 1.65, put 60g of the new process titanium slag crushed to a ratio of less than 15% of particles larger than 45 microns and 940g of titanium slag crushed to a ratio of less than 15% of particles larger than 45 microns Mix the titanium concentrate evenly, then add the mixed ore powder into the concentrated sulfuric acid while stirring, mix evenly, add 281g water to adjust the reaction acid concentration to be 84%; then heat up while stirring, when the temperature rises to 150°C, Heating was stopped, allowing the reaction to proceed spontaneously, resulting in a solid phase mixture;

[0040] The resulting solid-phase mixture was matured at 180°C for 1.5h, added 2500mL of water for leaching, and maintained at a leaching temperature of 70°C. After leaching for 2.5h, 25g of iron powder was added to continue leaching for a total of 4h.

[0041] Add 15 ppm of flocculant form...

Embodiment 2

[0045] Put 1683 grams of 98% concentrated sulfuric acid into a 5000mL beaker according to the acid ore ratio of 1.65, firstly mix 150g of crushed new process titanium slag and 910g of crushed titanium concentrate, and then add the mixed mineral powder to the In concentrated sulfuric acid, mix evenly, add 281g water to adjust the reaction acid concentration to be 84%; then heat up while stirring, when the temperature rises to 150°C, stop heating, the reaction will proceed spontaneously, and finally generate a solid phase mixture.

[0046] The resulting solid-phase mixture was matured at 180°C for 2h, added 2500mL of water for leaching, maintained the leaching temperature at 70°C, and leached for 4 hours. After leaching for 2.5h, 20g of iron powder was added for reduction.

[0047] After leaching, add flocculant formaldehyde dimethylamine modified polyacrylamide (same as Comparative Example 1) for sedimentation, filter and separate to obtain clear titanium solution, and then remo...

Embodiment 3

[0050] Put 1735 grams of 98% concentrated sulfuric acid into a 5000mL beaker according to the acid ore ratio of 1.7, first mix 180g of crushed titanium slag and 880g of crushed titanium concentrate (mixing ratio 20%), and then add it while stirring In concentrated sulfuric acid, mix evenly, then add 241g water to adjust the reaction acid concentration to be 86%; then heat up while stirring, when the temperature rises to 150°C, stop heating, so that it proceeds spontaneously, and finally generates a solid phase mixture.

[0051] The resulting solid phase mixture was matured at 220°C for 1.5h, added 2800mL of water for leaching, maintained the leaching temperature at 75°C, and the leaching time was 3.5 hours. After leaching for 2.5h, 20g of iron powder was added for reduction.

[0052] After leaching, add flocculant formaldehyde dimethylamine modified polyacrylamide (same as Comparative Example 1) to settle, filter and separate to obtain clear titanium solution, and then remove f...

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Abstract

The invention discloses a method for preparing titanium pigment from novel-process-flow titanium slag and titanium concentrated ore through mixed acidolysis, which belongs to the technical field of titanium pigment production. The method of the invention comprises the following steps: adding the novel-process-flow titanium slag and concentrated sulfuric acid into the titanium concentrated ore; regulating the acid concentration to 82 to 86 percent; raising the temperature to 130 to 150 DEG C; curing solid mixtures generated in the reaction for 1.5 to 3 h at 160 to 220 DEG C; adding water for leaching; carrying out solid-liquid separation, and removing impurities; carrying out freezing crystallization concentration on obtained clear titanium liquid to obtain concentrated titanium liquid; and carrying out hydrolysis, washing, rinsing; salt treatment, calcination and post treatment on the concentrated titanium liquid to obtain the titanium pigment. When the technical scheme of the invention is adopted, the novel-process-flow titanium slag which has low price but is not applicable to the titanium pigment production is applied to the titanium pigment production on the basis of not changing the existing process and equipment for producing titanium pigment from titanium concentrated ore, titanium pigment products with good pigment performance are prepared, waste materials are changed into useful materials, and in addition, the consumption of reducing ferrous powder is saved, so 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 which sulfuric acid method can be used to produce anatase and rutile ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/08
Inventor 蔡平雄张声贵邓伯松林发蓉代堂军袁顺林
Owner SICHUAN LOMON TITANIUM IND CO LTD
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