Method and device for sintering hollow ceramic microbeads

Abstract

The invention discloses a method and a device for sintering hollow ceramic microspheres. The method comprises the following steps: step 1, rapidly mixing fuel gas with combustion-supporting air to react to form stable and continuous high-temperature flame, step 2, atomizing material particles and uniformly dispersing the atomized material particles into a flame reaction zone, and step 3, sinteringthe material with the high-temperature flame and then cooling to obtain a hollow ceramic microsphere product. The sintering device comprises a combustion-supporting air shell, a combustion cylinder,a powder conveying pipeline and a gas uniform dilution pipe, wherein the combustion-supporting air shell is communicated with a combustion-supporting air inlet pipe, the combustion cylinder is coaxially arranged in the combustion-supporting air shell, the combustion-supporting air shell is provided with a plurality of outlet pipes communicated with the combustion cylinder, the combustion cylinderis connected with an igniter, and the powder conveying pipeline and the fuel gas uniform dilution pipe are arranged at one end of the combustion cylinder. With application of the method, the hollow ceramic microbead product which is light in weight, high in strength, low in oil absorption rate, good in sound insulation, flame retardance and electrical insulation, low in heat conduction, wear-resistant and corrosion-resistant can be prepared at low cost.

Description

technical field [0001] The invention relates to the technical field of preparing hollow ceramic microbeads, in particular to a sintering method and device for hollow ceramic microbeads. Background technique [0002] The appearance of hollow ceramic microspheres is off-white. It is a loose and fluid powder material. The main components are silicon dioxide and aluminum oxide. The diameter is between 5-1000μm. Its characteristics are: sound insulation, flame retardant Good electrical insulation, low density, low oil absorption, high strength and good stability, it is widely used as an additive for cementing mud in oil and natural gas exploitation, and can also be used as heat insulation material, refractory and light coating, Polymer composite materials, aerospace lightweight components, shipbuilding industry, electronic components, building decoration materials such as putty powder and putty materials, artificial marble, natural and synthetic wood pulp and additives in its pro...

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Problems solved by technology

[0004] In view of the above-mentioned problems existing in the existing method for producing hollow ceramic microspheres, the present invention provides a method and device for sinter...

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