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Process for preparing zirconium-aluminum composite powder from azs solid waste

A technology of composite powder and solid waste, applied in the field of refractory solid waste recycling, can solve the problem of low added value of downstream products, and achieve the effects of low production cost, wide application and simple production process

Active Publication Date: 2018-02-13
SHANDONG LEIBAO ZIRCONIUM SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a process for preparing zirconium-aluminum composite powder from AZS solid waste, which solves the problem of low added value of downstream products prepared from AZS solid waste, the process route is simple, and there is no waste water discharge in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] AZS solid waste, the main composition is: Al 2 o 3 60.5%, SiO 2 18.3%, ZrO 2 20.4%. The process of preparing zirconium-aluminum composite powder from AZS solid waste is as follows:

[0041] (1) Alkali fusion roasting:

[0042] AZS solid waste, sodium hydroxide and flux borax are mixed evenly in a weight ratio of 1:1:0.5, and calcined at a temperature of 800°C for 80 minutes to obtain a sintered material. The zirconia and trioxide in the AZS solid waste Dialuminum and silicon dioxide are converted into sodium zirconate, sodium metaaluminate and sodium metasilicate respectively;

[0043] (2) Acid leaching to remove silicon:

[0044]Add 25wt% hydrochloric acid to the sintered material, raise the temperature to 85°C, stir and react for 1 hour, and keep the concentration of hydrochloric acid at the end of the reaction at 1mol / L, then add PEG-4000 to make the concentration in the solution 0.004g / L. Incubate at 80°C for 1 hour, filter to obtain the zirconium-aluminum mi...

Embodiment 2

[0053] AZS solid waste, the main composition is: Al 2 o 3 51.5%, SiO 2 16.3%, ZrO 2 30%. The process of preparing zirconium-aluminum composite powder from AZS solid waste is as follows:

[0054] (1) Alkali fusion roasting:

[0055] Mix AZS solid waste, sodium hydroxide and flux borax in a weight ratio of 1:0.95:0.6, and calcinate at a temperature of 650°C for 60 minutes to obtain sintered material, zirconium dioxide and trioxide in AZS solid waste Dialuminum and silicon dioxide are converted into sodium zirconate, sodium metaaluminate and sodium metasilicate respectively;

[0056] (2) Acid leaching to remove silicon:

[0057] Add 30wt% hydrochloric acid to the sintered material, raise the temperature to 100°C, stir and react for 1.5h, and keep the concentration of hydrochloric acid at the end of the reaction at 2mol / L, then add PEG-4000 to make the concentration in the solution 0.005g / L, Incubate at 85°C for 1.5h, filter to obtain the zirconium-aluminum mixed salt solut...

Embodiment 3

[0066] AZS solid waste, the main composition is: Al 2 o 3 60.5%, SiO 2 18.3%, ZrO 2 20.4%. The process of preparing zirconium-aluminum composite powder from AZS solid waste is as follows:

[0067] (1) Alkali fusion roasting:

[0068] Mix AZS solid waste, sodium hydroxide, and flux borax in a weight ratio of 1:0.85:1, and roast at 750°C for 1.5 hours to obtain sintered material. Zirconium dioxide and trioxide in AZS solid waste Dialuminum and silicon dioxide are converted into sodium zirconate, sodium metaaluminate and sodium metasilicate respectively;

[0069] (2) Acid leaching to remove silicon:

[0070] Add 33wt% hydrochloric acid to the sintered material, raise the temperature to 95°C, stir for 80 minutes, and keep the concentration of hydrochloric acid at the end of the reaction at 1.8mol / L, then add PEG-4000 to make the concentration in the solution 0.003g / L , kept at 90°C for 80 minutes, filtered to obtain a zirconium-aluminum mixed salt solution and silica gel, t...

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Abstract

The invention relates to a process for preparing zirconium-aluminum composite powder from AZS solid waste, and belongs to the technical field of refractory solid waste recycling. The AZS solid waste is first roasted by alkali fusion to obtain sintered material. The sintered material is subjected to acid leaching to remove silicon to obtain a zirconium-aluminum mixed salt solution. The zirconium-aluminum mixed salt solution is oxidized and extracted to obtain a zirconium-aluminum mixed salt purification solution. The zirconium-aluminum mixed salt purification solution is added to the lye for neutralization and precipitation. After filtering, washing and drying, the zirconium-aluminum composite powder precursor is obtained. Finally, the zirconium-aluminum composite powder precursor is calcined to obtain the zirconium-aluminum composite powder. , to solve the problem of low added value of downstream products prepared from AZS solid waste, and the prepared zirconium-aluminum composite powder has a wide range of applications, and can be used in the preparation of various ceramics and refractory materials such as ZTA ceramics, zirconium corundum abrasives and zirconium corundum bricks.

Description

technical field [0001] The invention relates to a process for preparing zirconium-aluminum composite powder from AZS solid waste, and belongs to the technical field of refractory solid waste recycling. Background technique [0002] AZS fused zirconia corundum bricks are mainly used to make glass furnaces. As a big country in glass production, my country needs about 400,000 tons of AZS zirconium corundum bricks every year. Under normal circumstances, the life of glass furnaces is 5-8 years, so that every year A large amount of AZS solid waste will be produced. According to the consumption of refractory materials accounting for 40%, my country's annual waste AZS solid waste will reach 200,000-300,000 tons, and the annual AZS solid waste generated in Zibo, Shandong alone will reach 40,000 tons. With the implementation of environmental protection policies, the competition in the domestic refractory market has intensified, and more and more attention has been paid to the recycling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/10C04B35/626
Inventor 鲍猛王光强李玉芝刘学燕高延峰
Owner SHANDONG LEIBAO ZIRCONIUM SCI&TECH