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A low-temperature preparation of catio by sintering flue gas desulfurization ash 3 powder method

A technology for sintering flue gas and desulfurization ash, applied in chemical instruments and methods, alkaline earth metal titanate, inorganic chemistry, etc., can solve the problems of difficult product purity control, long synthesis time, complicated process, etc., and achieve significant social and economic benefits. , The cost of raw materials is low, and the process is simple.

Active Publication Date: 2021-09-03
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, CaTiO 3 There are three main methods for powder preparation: (1) high-temperature solid-phase method: using CaCO 3 or CaO and TiO 2 The mixed powder is used as raw material for high-temperature calcination. This method is simple in process, but the synthesis temperature is generally above 1350°C, and the particle size of the obtained powder is relatively large; (2) Mechanochemical method: CaO and TiO 2 The mixed powder is used as the raw material, and the mechanical force generated by the high-energy ball mill makes the mixed powder undergo amorphization, chemical reaction, nucleation, grain growth and other processes to form CaTiO 3 , this method does not require high temperature, and the synthesized powder has a smaller grain size, but the synthesis time is long, and the product purity is not easy to control; (3) Liquid phase method: including coprecipitation method, hydrothermal method, sol-gel method, etc., The prepared CaTiO 3 The powder has high purity and small particle size, but the cost of raw materials is high and the process is complicated

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  • A low-temperature preparation of catio by sintering flue gas desulfurization ash <sub>3</sub> powder method
  • A low-temperature preparation of catio by sintering flue gas desulfurization ash <sub>3</sub> powder method
  • A low-temperature preparation of catio by sintering flue gas desulfurization ash <sub>3</sub> powder method

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Effect test

Embodiment 1

[0028] 1.000g sintered flue gas desulfurization ash, 0.844g TiO 2 and 1.119g Na 2 CO 3 Mix the powder evenly and put it into a corundum crucible, heat it to 700°C, keep it warm for 5 hours, then cool it down naturally, then put the product in the water for 2 hours, filter it, wash it with water and ethanol several times, and dry it to get CaTiO 3 Powder.

[0029] figure 1 Prepared CaTiO for this embodiment 3 From the XRD spectrum of the powder, it can be seen that the powder prepared in this embodiment is crystalline CaTiO 3 , without other impurity phases. figure 2 Prepared CaTiO for this embodiment 3 From the SEM photo of the powder, it can be seen that the particle size of the powder is about 100nm.

Embodiment 2

[0031] 1.000g sintered flue gas desulfurization ash, 0.844g TiO 2 and 1.459g K 2 CO 3 Mix the powder evenly and put it into a corundum crucible, heat it to 700°C, keep it warm for 3 hours, then cool it down naturally, then soak the product in the water for 2 hours, filter it, wash it with water and ethanol several times, and dry it to get CaTiO 3 Powder.

Embodiment 3

[0033] 1.000g sintered flue gas desulfurization ash, 0.844g TiO 2 and 2.003g Na 2 CO 3 Mix the powder evenly and put it into a corundum crucible, heat it to 800°C, keep it warm for 1 hour, then cool it down naturally, then put the product in the water for 2 hours, filter it, wash it with water and ethanol several times, and dry it to get CaTiO 3 Powder.

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Abstract

The invention provides a low-temperature preparation of CaTiO by sintering flue gas desulfurization ash 3 The powder method belongs to the technical field of comprehensive utilization of industrial solid waste and preparation of inorganic non-metallic materials. The present invention specifically comprises the following steps: desulfurizing sintering flue gas ash, TiO 2 Mix it with alkali metal salt powder containing carbonate and heat it to above 700°C for calcination, soak the product in water, filter, wash and dry to get CaTiO 3 Powder. The invention uses cheap sintered flue gas desulfurization ash as the Ca source, the synthesis temperature is significantly lower than that of the traditional solid-phase method, and the obtained product has a smaller particle size. The inventive method has simple process and low cost, can realize high value-added utilization of sintering flue gas desulfurization ash, and has remarkable social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of industrial solid waste and preparation of inorganic non-metallic materials, and specifically relates to a low-temperature preparation of CaTiO by sintering flue gas desulfurization ash 3 powder method. Background technique [0002] The maturity and development of sintering flue gas desulfurization technology has effectively solved the problem of flue gas pollution, but a large amount of desulfurization ash has been produced, resulting in new solid waste pollution. At present, the desulfurization ash treatment technology is not mature enough, and most of them can only be stockpiled, which not only takes up a lot of valuable land resources, but also may cause secondary pollution to the environment. The development and utilization of the existing desulfurization ash are mainly concentrated in cement, wall filling materials, soil modification, etc., and the added value of the pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00
CPCC01G23/006C01P2002/72C01P2004/03
Inventor 冉松林龙红明朱建华魏汝飞丁祥代兵
Owner ANHUI UNIVERSITY OF TECHNOLOGY