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

A technology of titanium concentrate and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of continuous production process, quality limitation of titanium dioxide, and difficulty in large-scale production, so as to save consumption and low price , the effect of saving iron powder

Active Publication Date: 2010-10-13
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

[0041] Put 1683 grams of 98% concentrated sulfuric acid into a 5000mL beaker according to the acid-ore ratio of 1.65, and crush 60g to less than 15% of particles larger than 45 microns in the new process titanium slag and 940g of titanium slag crushed to particles larger than 45 microns to less than 15% The titanium concentrate is mixed evenly, then the mixed mineral powder is added to the concentrated sulfuric acid while stirring, and the mixture is evenly mixed. Add 281g of water to adjust the reaction acid concentration to 84%; then heat up while stirring. When the temperature rises to 150°C, Stop heating and allow the reaction to proceed spontaneously to form a solid phase mixture;

[0042] The resulting solid phase mixture was matured at a temperature of 180°C for 1.5h, leached with 2500mL of water, maintained at a temperature of 70°C, leached for 2.5h and then added with 25g iron powder to continue leaching for a total of 4h.

[0043] Add flocculant formaldehyde dimethylamine...

Embodiment 2

[0047] Put 1683 grams of 98% concentrated sulfuric acid into a 5000mL beaker according to the acid-to-ore ratio of 1.65, first mix 150g of the new process titanium slag and 910g of the pulverized titanium concentrate, and then add the mixed mineral powder while stirring. In the concentrated sulfuric acid, mix well, add 281g water to adjust the reaction acid concentration to 84%; then heat up while stirring. When the temperature rises to 150°C, stop heating, the reaction will proceed spontaneously, and finally a solid phase mixture will be formed.

[0048] The resulting solid phase mixture was matured at 180°C for 2h, leached with 2500mL of water, maintained at 70°C, and the leaching time was 4 hours. After leaching for 2.5h, 20g iron powder was added for reduction.

[0049] After leaching is completed, the flocculant formaldehyde dimethylamine modified polypropionamide (same as Comparative Example 1) is added for sedimentation, filtered and separated to obtain a clear titanium solut...

Embodiment 3

[0052] 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 the new process titanium slag and 880g of the pulverized titanium concentrate (mixing ratio 20%), and then add while stirring In the concentrated sulfuric acid, mix well, then add 241g of water to adjust the reaction acid concentration to 86%; then heat up while stirring. When the temperature rises to 150°C, stop heating to proceed spontaneously and finally generate a solid phase mixture.

[0053] The resulting solid phase mixture was matured at 220°C for 1.5h, and 2800mL of water was added for leaching. The leaching temperature was maintained at 75°C. The leaching time was 3.5 hours. After leaching for 2.5h, 20g iron powder was added for reduction.

[0054] After leaching is completed, the flocculant formaldehyde dimethylamine modified polypropionamide (same as Comparative Example 1) is added for sedimentation, filtered and separated to obtain a cle...

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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 using titanium slag in a new process, 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, paint, plastics, paper, ink, synthetic fiber, rubber, welding rod, capacitor, electric porcelain, cosmetics, correction fluid, etc. There are two types of titanium dioxide products: rutile type (Rutile R type) and anatase type (Anatase A type). The rutile type has a compact crystal structure, relatively high density, relatively stable, and low optical activity, so it has good weather resistance and high High hiding power, achromatic power; Anatase has a lower relative density and poor light resistance. [0003] The production methods of titanium dioxide mainly...

Claims

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Application Information

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Patent Type & Authority Applications(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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