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Method for preparing heat preservation material tobermorite by using zirconium-silicon slag

A technology of tobermolite and thermal insulation materials, which is applied in the field of solid waste reuse in chemical production, can solve environmental pollution and other problems, and achieve the effects of reducing production costs, simple process, and obvious economic and social benefits

Inactive Publication Date: 2012-10-17
BENGBU ZHONGHENG NEW MATERIALS SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for producing thermal insulation material tobermullite by using zirconium-silicon slag, which converts a large amount of zirconium-silicon slag which is difficult to handle in the production of zirconium oxychloride by alkali fusion method into energy-saving and environment-friendly tobermullite. The stone-type calcareous thermal insulation refractory material solves the problem of environmental pollution and at the same time provides an economical and simple recycling method for the zirconium silicon slag produced by the alkali fusion method to produce zirconium oxychloride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 2kg of zirconium silicon slag to 10kg of water, stir and wash, wash, centrifugally filter, and wash repeatedly 4 times to obtain dechlorinated zirconium silicon slag; add 0.24kg of quicklime to 1Kg of water at 85°C for digestion treatment, and dechlorinate silicon slag that has been washed above Zirconium slag and digested quicklime are added to the homogenizing mixing kettle, and at the same time, 56kg of water is added for stirring. The stirring speed is 40rpm, and the stirring time is 6 hours. The speed is raised to 140°C, and the holding time is 4 hours. During the reaction, the speed of the stirrer is 65rpm for continuous stirring; add 0.09kg of alkali-resistant glass fiber to the stirred and reacted kettle material, stir at 90rpm for 1 hour, and pour Into the model, heat preservation and drying treatment at 105°C for 10 hours, and the finished product is inspected and packaged for delivery.

Embodiment 2

[0025] Add 10 kg of water to 2 kg of zirconium silicon slag, stir and wash it, and then centrifugally filter after washing. After repeated washing for 4 times, the dechlorinated zirconium silicon slag is obtained; Add slag and digested quicklime into the homogenizing mixing kettle, and at the same time add 57.5kg of water for stirring, the stirring speed is 60rpm, and the stirring time is 7 hours. The speed is raised to 160°C, and the holding time is 5 hours. During the reaction, the speed of the stirrer is 70rpm for continuous stirring; add 0.11kg of alkali-resistant glass fiber to the stirred and reacted kettle material, stir at 90rpm for 1 hour, and pour Into the model, heat preservation and drying treatment at 108°C for 10 hours, and the finished product is inspected and packaged for delivery.

Embodiment 3

[0027] Add 2kg of zirconium silicon slag to 10kg of water, stir and wash, and then centrifugally filter after washing. After repeated washing for 5 times, the chlorine-free zirconium silicon slag is obtained; add 0.32kg of quicklime to 1Kg of water at 85°C for digestion treatment, and the above-mentioned washed dechlorinated silicon zirconium Add the slag and digested quicklime into the homogenizing mixing kettle, and at the same time add 65kg of water for stirring, the stirring speed is 65rpm, and the stirring time is 7 hours. Raise the temperature to 170°C and hold for 6 hours. During the reaction, use the stirrer at a speed of 70rpm for continuous stirring; add 0.116kg of alkali-resistant glass fiber to the stirred and reacted kettle material, stir for 1 hour at a speed of 100rpm, and pour into In the model, heat preservation and drying treatment at 108°C for 11 hours, and the finished product is inspected and packaged before leaving the factory.

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Abstract

The invention discloses a method for preparing heat preservation material tobermorite by using zirconium-silicon slag. The method comprises the following steps: washing the zirconium-silicon slag by water and enabling the pH (potential of hydrogen) value of the treated zirconium-silicon slag to be 6-7; adding calcium raw material and water into the water-washed zirconium-silicon slag and mixing to homogenize; adding the mixed homogenized raw materials into a reaction kettle and reacting; adding reinforced fibre into the kettle after the reaction is finished, and blending to mix; casting and moulding; and, drying to obtain the heat preservation material tobermorite after moulding. The heat preservation material tobermorite is widely applied to the ceramic, chemical, metallurgical and architectural fields. Meanwhile, the tobermorite is a good fireproof building material. The method provided by the invention does not need any special equipment, uses relatively simple process, and is easy to popularize. The economical benefit and the social benefit are great. The problems on the recovery and utilization of a lot of zirconium-silicon slag generated in the production process of zirconium oxychloride are well solved. The production cost of the enterprises is reduced.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling in chemical industry, and in particular relates to a method for recycling zirconium silicon slag, a waste of zirconium oxychloride produced by an alkali fusion method, and processing a thermal insulation material tobermullite. Background technique [0002] According to public information reports, the annual output of zirconium oxychloride in my country was about 250,000 tons in 2010-2011, and the resulting zirconium-silicon slag was about 200,000 tons. Zirconium silicon slag is produced in the flocculation and silicon removal stage of zirconium oxychloride produced by alkali fusion method, and its main component is SiO 2 ·nH 2 O, water and silicon oxide account for 95-98% of its total mass, of which silicon oxide is 15-30%, and the rest is unreacted zircon sand and hydrochloric acid and other impurities. The usual treatment method is to produce cheap and low-grade white carbon blac...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 彭寿王永和刘强董树人汤忠海
Owner BENGBU ZHONGHENG NEW MATERIALS SCI & TECH CO LTD
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