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Method for preparing titanium pigment by using titanium residues obtained by directly reducing titanium-iron oxide

A technology of oxides and titanium dioxide, applied in the direction of titanium oxide/hydroxide, titanium dioxide, process efficiency improvement, etc., can solve the problems of titanium dioxide-free process technology, removal of impurities, and inability to fully utilize titanium resources

Inactive Publication Date: 2012-08-08
沙立林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Chinese patent application CN101857269A discloses a method for preparing titanium dioxide by mixing titanium slag (new process titanium slag) obtained by direct reduction of ferro-titanium oxide with titanium concentrate for sulfuric acid acidolysis. Into the original raw material titanium concentrate for the production of titanium dioxide, thus diluting the dyeing elements in the raw material, and did not substantially remove impurities from the titanium slag of the new process, and its infiltration amount is only 10% to 25% of the titanium concentrate, which cannot Make full use of the titanium resources of the new process titanium slag
[0042] To sum up, there is no effective use of direct reduction new process titanium slag to produce titanium dioxide in this field.

Method used

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  • Method for preparing titanium pigment by using titanium residues obtained by directly reducing titanium-iron oxide
  • Method for preparing titanium pigment by using titanium residues obtained by directly reducing titanium-iron oxide
  • Method for preparing titanium pigment by using titanium residues obtained by directly reducing titanium-iron oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0216] Example 1 Preparation of titanium-rich hydrochloric acid leaching slag by leaching and directly reducing titanium slag using pure dilute hydrochloric acid

[0217] 1. Measure 1.2 liters of 20% hydrochloric acid and pour it into a 2-liter glass;

[0218] 2. Weigh 600 grams of negative 50 mesh titanium slag purchased from the market by direct reduction electric furnace melting titanium slag—direct reduction new process titanium slag (1), pour it into a 2-liter glass cup and mix it with hydrochloric acid solution, and the slurry will automatically heat up to 92°C and stirred for 2 hours. This process is pre-soaking, which is mainly to leach the iron in the new process titanium slag-1 first, which is an exothermic reaction, so the temperature will automatically rise;

[0219] 3. Move to a 3-liter zirconium reaction tank and heat to about 140°C for pressure leaching;

[0220] 4. After two hours, stop heating and cool down to 80°C naturally;

[0221] 5. Rapidly filter the ...

Embodiment 2

[0226] Example 2 Preparation of titanium-rich hydrochloric acid leaching slag by using hydrochloric acid leaching solution to leach titanium slag from a new process of direct reduction

[0227] 1, prepare the leaching solution containing 18% hydrochloric acid with the leaching mother liquor of embodiment 1 and 32% new hydrochloric acid, this leaching solution is the hydrochloric acid composite system solution containing soluble chloride salts such as aluminum chloride, calcium chloride, magnesium chloride , Table 10 is the main components of the leaching solution. Measure 1.4 liters of this extract and pour it into a 2 liter glass;

[0228] Table 10 Example 2 Leaching Solution Main Component Analysis

[0229] the element

[0230] 2. Weigh 600g-50 mesh new process titanium slag-1, pour it into a 2-liter glass cup and mix it fully with the leaching solution, the slurry will automatically heat up to 91°C, and stir for 2 hours to pre-soak;

[0231] 3. Move to a 3-liter...

Embodiment 3

[0239] Example 3 Preparation of titanium-rich hydrochloric acid leaching slag using hydrochloric acid leaching solution to leach titanium slag from a new process of direct reduction

[0240] 1, prepare the leaching solution containing 18% hydrochloric acid with the leaching mother liquor of embodiment 1 and 32% new hydrochloric acid, this leaching solution is the hydrochloric acid composite system solution containing soluble chloride salts such as aluminum chloride, calcium chloride, magnesium chloride , measure 1.4 liters of the leaching solution, and pour it into a 2-liter glass;

[0241] 2. Weigh 600g-50 mesh new process titanium slag-2, pour it into a 2-liter glass cup and mix it fully with the leaching solution, the slurry is automatically heated to 80°C, and stirred for 2 hours to pre-soak;

[0242] 3. Move to a 3-liter zirconium reaction tank and heat to about 145°C for further leaching;

[0243] 4. After 2 hours, stop heating and cool naturally to 80°C;

[0244] 5. R...

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Abstract

The invention provides a method for preparing a titanium pigment by adopting a novel direct reduction flow. A novel raw material is provided for the production of a titanium pigment with a sulfuric acid process, and a process flow is provided for downstream utilization of a direct reduction product of vanadium titano-magnetite simultaneously. A novel hydrochloric acid pretreatment process with a novel direct reduction flow for titanium residues is adopted, so that dyeing elements such as aluminum, calcium, magnesium, iron, chromium, vanadium and the like in the titanium residues in the novel process are removed effectively, pretreated titanium-rich hydrochloric acid leaching residues are directly applied to production of a titanium pigment with a sulfuric acid process, the conventional refrigeration iron removing and concentration purifying processes are not required, special aluminum, chromium and vanadium processes are not required, ferrous sulfate is not produced, and ammonia alum waste as well as chromium, vanadium and ferrous sulfide residues which are difficult to treat are not produced. Moreover, the used hydrochloric acid and sulfuric acid are completely recycled in an enclosed loop, and a diluted waste acid liquid is not produced.

Description

technical field [0001] The invention belongs to the field of titanium dioxide production, and in particular relates to a method for preparing titanium dioxide from titanium slag obtained by direct reduction of ferrotitanium oxide. Background technique [0002] The reserves of titanium resources in the Panxi area of ​​my country account for more than 90% of the national reserves. The vanadium-titanium magnetite in this area is mainly symbiotic rock ore. The main mineral composition and the distribution of titanium in each mineral are listed in Table 1 and Table 2 respectively. ("Study on Process Mineralogy of a Vanadium-Titanium Magnetite in Panzhihua Area", Li Liang et al., Metal Mine, 2010 No.4: pp 89~92). [0003] Table 1. Mineral composition of typical vanadium-titanium magnetite in Panzhihua [0004] mineral Titanium Magnetite Ilmenite Sulfide Titanium Ordinary Pyroxene etc. Plagioclase etc. Content % 43～45 8.5～9.5 1....

Claims

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Application Information

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IPC IPC(8): C01G23/08C22B7/04
CPCY02P10/20
Inventor 陈树忠
Owner 沙立林
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