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Method for preparing rutile type titanium-rich material from primary titanium-rich material

A rutile-type, titanium-rich material technology, applied in the field of metallurgy, can solve the problems of complexity, long reaction time, poor sulfuric acid leaching effect, etc., and achieve the effect of increasing mutual collision

Inactive Publication Date: 2005-12-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest advantage of this process is that it can utilize titanium white waste acid, but the disadvantages are: (1) Since the leaching effect of sulfuric acid itself is worse than that of hydrochloric acid, some incompletely reacted products after filtration need to be returned for leaching; (2) The reaction time Longer (leaching time 12h); (3) The process TiO 2 The lower the grade, the more complicated the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The chemical composition of the primary titanium-rich material is TiO 2 60.58%, Tfe 16.12%, SiO 2 4.6%, Al 2 o 3 1.16%, CaO+MgO 9.4%;

[0020] The prepared primary titanium-rich material is put into a microwave radiation heating leaching device, and then leaching is performed by adding leaching agent hydrochloric acid and additive ammonium bifluoride. 0.5% by weight, the liquid-solid ratio is V: W=8: 1 (L: kg), the pickling temperature is 140°C, and the pickling time is 120min,

[0021] The leached slag was filtered, washed, and then microwave-calcined with a power of 500W; the calcination time was 60min, and the calcination temperature was 800°C. The rutile-type titanium-rich material is obtained, the grade of the titanium-rich material is 97.68%, the CaO+MgO is 0.38%, the recovery rate of titanium is 95%, and the yield is 66%.

Embodiment 2

[0023] The chemical composition of the primary titanium-rich material is TiO 2 61.84%, Tfe 17.20%, SiO 2 5.6%, Al 2 o 3 1.25%, CaO+MgO 10.8%;

[0024] The concentration of hydrochloric acid is 8% by weight, the consumption of ammonium hydrofluorate accounts for 0.8% by weight of the primary titanium-rich material, the liquid-solid ratio is V:W=10:1 (L:kg), the pickling temperature is 150°C, and the pickling time 100min.

[0025] The leaching residue was filtered, washed and calcined by microwave with a power of 700W; the calcining time was 45min, and the calcining temperature was 850°C. A rutile-type high-grade titanium-rich material is obtained. The grade of the titanium-rich material is 96.98%, CaO+MgO is 0.33%, and MnO is 0.16%. The recovery rate of titanium was 98%, and the yield rate was 67%.

Embodiment 3

[0027] 1. The chemical composition of raw material high-calcium-magnesium primary titanium-rich material is TiO 2 : 69.86%, TFe: 17.46%, SiO 2 : 5.8%, Al 2 o 3 : 1.34%, CaO+MgO: 10.2%.

[0028] The concentration of hydrochloric acid is 5% by weight, the consumption of ammonium hydrofluorate accounts for 1% by weight of the weight of the primary titanium-rich material, the liquid-solid ratio is V:W=12:1 (L:kg), the acid leaching temperature is 160°C, and the acid leaching The time is 90 minutes.

[0029] The leached residue was filtered, washed and calcined by microwave with a power of 1000W, a calcination time of 30min, and a calcination temperature of 900°C. A rutile-type high-grade titanium-rich material is obtained, the grade of the titanium-rich material is 96.16%, and the CaO+MgO is 0.35%. The recovery of titanium was 97%, and the yield was 62%.

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Abstract

The invention relates to a method refining rutile titanium-rich material with junior titanium-rich material. Heat the junior material with microwave radiation, while add in extractor HCl and addition ammonium hydrofluoride performing a microwave acid dip, the HCl density is controlled between 5 to 10 percent by weight, the adopted amount of ammonium hydrofluoride is 0.5 to 1 percent by weight, the liquor solid ratio V : W = 8 to 12 : 1, producing extraction material containing TiO2 and extraction liquor containing chloride of calcium, magnesium, and ferric. The extraction material is made into rutile titanium-rich material of purity greater than 96 percent, the amount of CaO plus MgO lager lesser than 0.4 percent after processes of filtering, washing, and microwave burning. The titanium recycle is of high rate and purity due to that extraction and burning are adopted microwave. The product can be applied as raw material of boiling chloridization or spongy titanium electrolyse.

Description

[0001] (1) Technical field: metallurgical technical field. (2) Background technology [0002] Known methods for producing primary titanium-rich materials to prepare rutile-type titanium-rich materials: [0003] 1. Choose one smelter combined with dilute hydrochloric acid pressure leaching production process. In 1984, Chengdu University of Science and Technology and Zigong Dongsheng Titanium Yellow Factory used Φ3000mm leaching tank as the main test equipment to carry out dilute hydrochloric acid pressure leaching process research on the production of artificial rutile. The artificial rutile produced by this process contains TiO 2 >94%, CaO+MgO<0.5%. This process has realized industrial production, and the acid resistance effect of the leaching ball is better, but the regeneration and recycling of hydrochloric acid have not been realized, resulting in the disadvantages of high production cost and serious environmental protection problems; [0004] 2. Pre-oxidation-fluid...

Claims

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Application Information

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IPC IPC(8): C22B34/12
CPCY02P10/20
Inventor 彭金辉张世敏黄孟阳孙艳张利波范兴祥朱艳丽
Owner KUNMING UNIV OF SCI & TECH
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