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Method for extracting zirconium oxide from zirconium-containing solid solution substance

A technology of solid solution and zirconia, applied in the direction of zirconia, can solve the problems of multiple procedures, difficult treatment, multiple temperature control points and large gradient changes, etc., and achieve the effect of less waste residue, alkali fog and less heat loss

Active Publication Date: 2014-07-30
山东鸿远新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method involves various reagents such as caustic soda, borax, sulfide, ammonia water, hydrochloric acid, etc. in order to extract zirconium. The composition of wastewater is complex, the treatment is difficult, and it is impossible to obtain satisfactory technical and economic results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] An example of the method for extracting zirconium oxide from a zirconium-containing solid solution material according to the present invention includes the following steps:

[0046] (1) Will contain (Zr+Hf)O 2 80.28%, Y 2 O 3 18.70% cubic zirconia waste powder and caustic soda are mixed according to the mass ratio of 1:0.95, put into a stainless steel pot for sintering, the sintering temperature is 800 DEG C, and the time is 3 hours to obtain a sintered material. ZrO 2 The conversion rate is 99.47%.

[0047] (2) The sintered material is soaked with the mother liquor or diluted hydrochloric acid described in step (5) according to the solid-liquid ratio of 1:4, time 1h, pH 3-4, and solid-liquid separation of the slurry to obtain sodium zirconate and hydroxide Zirconium mixture and salt solution. In particular, the elution and purification mother liquor described in step (5) is a mother liquor from which zirconium oxychloride can be separated after one cycle, and it is initial...

Embodiment 2

[0055] Another example of the method for extracting zirconium oxide from the zirconium-containing solid solution material according to the present invention includes the following steps:

[0056] (1) Will contain (Zr+Hf)O 2 94.20%, SiO 2 3.65%, Al 2 O 3 1.90% of the zirconia composite refractory powder and caustic soda are mixed at a mass ratio of 1:0.82, put into a stainless steel pot and sintered in the furnace at a sintering temperature of 800°C for 4 hours to obtain a sintered material, ZrO 2 The conversion rate is 99.50%.

[0057] (2) The above-mentioned sintered material is leached and washed with the mother liquor described in step (5) or diluted hydrochloric acid according to the solid-liquid ratio of 1:4, time 45min, pH 4-5, and solid-liquid separation of the slurry to obtain sodium zirconate and zirconium hydroxide Mixture and salt solution.

[0058] (3) The mixture of sodium zirconate and zirconium hydroxide obtained above is leached with hydrochloric acid or the recovered...

Embodiment 3

[0065] The third example of the method for extracting zirconium oxide from zirconium-containing solid solution material according to the present invention includes the following steps:

[0066] Will contain (Zr+Hf)O 2 90.65%, Y 2 O 3 4. 60% of the zirconia structured ceramic powder and caustic soda are mixed in a mass ratio of 1:0.85, put into a stainless steel pot and sintered at a sintering temperature of 800°C for 4 hours to obtain a sintered material. ZrO 2 The conversion rate is 99.73%.

[0067] The rest of the method steps for preparing zirconia from the sintered material are the same as in Example 1.

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PUM

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Abstract

The invention relates to a method for extracting zirconium oxide from a zirconium-containing solid solution substance. The method for extracting the zirconium oxide from the zirconium-containing solid solution substance comprises the following steps: mixing zirconium-containing solid solution substance powder with sodium hydroxide and then heating and sintering, so that an acid-soluble sintered material is obtained, carrying out immersion cleaning on the acid-soluble sintered material with a diluted hydrochloric acid aqueous solution, enriching for obtained mixture of sodium zirconate and zirconium hydroxide and a salt solution, carrying out hot dipping on the mixture for obtaining a zirconium oxychloride solution with a hydrochloric acid solution, evaporating, concentrating and cooling the zirconium oxychloride solution for separating out zirconium oxychloride crystals, and purifying the obtained zirconium oxychloride crystals; carrying out neutralizing treatment on the salt solution, extracting useful components, and then concentrating the salt solution for obtaining industrial salt. The method for extracting the zirconium oxide from the zirconium-containing solid solution substance has the advantages of simple technological process, energy conservation, low consumption, high metal recovery rate, less environmental pollution, benefit to harmonious development of natural resources and the ecological environment and obvious resource recycling effect.

Description

technical field [0001] The invention relates to the technical field of rare metal smelting, in particular to a method for extracting zirconia from zirconium-containing solid solution substances. Background technique [0002] Zirconia has excellent properties in mechanics, heat, electricity and optics. Its application in the high-tech field shows that other metal materials cannot replace it. Nowadays, zirconia is especially suitable for the production of partially stable and fully stable The demand for zirconium oxide and other zirconium compounds such as zirconium oxychloride and zirconium sulfate is growing. [0003] Until now, the main raw material for producing zirconia is zircon sand concentrate, and the main chemical composition is zirconium silicate ZrSiO 4 , the theoretical composition is ZrO 2 67.23% and SiO 2 32.77%. In order to decompose zircon concentrate to produce zirconia and other zirconium compounds, so far, many different metallurgical methods have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02
Inventor 李树昌
Owner 山东鸿远新材料科技股份有限公司
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