Method for preparing high-quality titanium white from titanium-containing solution

A high-quality, solution technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of many influencing factors, difficult to control product quality, high processing cost, avoid environmental damage, fast reaction rate and improve quality Effect

Active Publication Date: 2011-04-06
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ferrous sulfate crystals and waste acid will be produced in the production process of titanium dioxide by sulfuric acid method. At present, there is no effective recycling method, and the treatment cost is high. The environmental protection problem cannot be completely solved. The product quality is low, and it belongs to the industry restricted by the state.
Especially in the sulfuric acid titanium dioxide production process, metatitanic acid is prepared by liquid-phas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] Hydrochloric acid is used to dissolve ilmenite, and the method of extraction and impurity removal is adopted to remove iron, calcium, magnesium, aluminum and other impurity elements, and then a pure titanium-containing solution is obtained as a raw material. TiO in solution 2 The content is 10g.L -1 , the iron content is ppm. Add potassium salt, zinc salt and aluminum salt to the titanium solution, wherein the amount of potassium salt added is TiO in the solution 2 0.2% of the content (in K 2 O meter), the amount of zinc salt added is TiO in the solution 2 0.2% of the content (calculated as ZnO), the amount of aluminum salt added is TiO in the solution 2 0.2% of the content (in Al 2 O 3 count). Control the flow rate of titanium-containing solution to 1L.h -1 , and atomized it into droplets with a diameter of 0.2 μm using an air flow nozzle. Introduce hot air, the volume ratio of atomized titanium liquid and hot air is 1:100, and make it cont...

Example Embodiment

[0026] Example 2

[0027] Utilize nitric acid to dissolve ilmenite, and adopt the method of extraction and removal of impurities to obtain a pure titanium-containing solution as a raw material after removing impurity elements such as iron, calcium, magnesium, and aluminum. TiO in solution 2 The content is 150g.L -1 , the iron content is 20ppm. Potassium salts, zinc salts and aluminum salts are added to the titanium solution. The amount of potassium salt added is TiO in the solution 2 0.55% of the content (in K 2 O meter), the amount of zinc salt added is TiO in the solution 2 0.2% of the content (calculated as ZnO), the amount of aluminum salt added is TiO in the solution 2 0.2% of the content (in Al 2 O 3 count). Control the flow rate of titanium-containing solution to 1.5L.h -1 , and atomized it into droplets with a diameter of 5 μm using a pressure nozzle. Introduce hot air, the volume ratio of atomized titanium liquid and hot air is 1:20, and make it come into c...

Example Embodiment

[0028] Example 3

[0029] The titanium-containing solution prepared by the reaction of titanium tetrachloride and water is used as the raw material (how much is added). TiO in solution 2 The content is 250g.L -1 , the iron content is 30ppm. Control the flow rate of titanium-containing solution to 2L.h -1 , and atomized it into droplets with a diameter of 10 μm using an ultrasonic atomizing nozzle. Introduce hot air, the volume ratio of atomized titanium liquid and hot air is 1:50, and make it come into contact with hot air, the temperature of hot air is 250℃, and the flow rate of hot air is 200m 3 .h -1 . Under the action of hot air, the water and free acid in the droplets gradually volatilize, the acidity of the droplets decreases and a hydrolysis reaction occurs to generate hydrated titanium dioxide (TiO 2 .H 2 O, metatitanic acid) solid, falling to the bottom of the reactor. The resulting metatitanic acid solid was collected, and potassium, zinc, and aluminum salts...

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Abstract

The invention discloses a method for preparing high-quality titanium white from titanium-containing solution. The method comprises the following steps of: adding kali salt, zinc salt and aluminum salt into the titanium-containing solution to atomize the titanium-containing solution; adding the atomized titanium-containing solution into a reactor dropwise; introducing hot air into the reactor and hydrolyzing the titanium-containing solution at the temperature of between 150 and 350 DEG C so as to generate solid-phase hydrated titanium dioxide; and calcining the hydrated titanium dioxide at the temperature of between 300 and 1,000 DEG C for 1 to 5 hours so as to obtain the high-quality titanium white. In the method, continuous spray hydrolysis is used instead of the conventional intermittent liquid-phase hydrolysis, so that reaction speed is high, yield is high, problems encountered in the conventional titanium white producing process by a sulfuric acid method can be solved effectively, product quality is enhanced, damage to the environment is avoided and the production cost of the titanium white can be lowered simultaneously.

Description

technical field [0001] The invention relates to a production process of titanium dioxide, in particular to a method for preparing high-quality titanium dioxide by using a titanium-containing solution. Background technique [0002] At present, there are two main production methods of high-quality raw material grade titanium dioxide: chloride method and sulfuric acid method. [0003] The production process of chloride titanium dioxide has high requirements on raw materials, and ilmenite cannot be used directly for production. For vanadium-titanium magnetite with high calcium and magnesium content, it is also difficult to convert it into titanium raw materials suitable for the production process of chloride-based titanium dioxide through traditional raw material upgrading methods such as smelting. At the same time, the chlorination titanium dioxide production process has extremely high requirements on equipment, and the technical secrets of key equipment such as chlorination f...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 张天播唐勇马维平罗志强税必刚陈新红杜剑桥程晓哲
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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