METHOD FOR PRODUCING GLASS-COATED FLUORESCENT AGGREGATE

To provide a method for producing a glass-coated fluorescent aggregate which can mass-produce the glass-coated fluorescent aggregate having high afterglow brightness.SOLUTION: A method for producing a glass-coated fluorescent aggregate includes: a step of adding 0.05 wt.% or more and 2.00 wt.% or less a water-soluble organic binder in an outer percentage to a mixed raw material obtained by mixing a fluorescent material with glass powder to produce a granular substance; and a step of firing the produced granular substance with an internal combustion type rotary kiln 100. Thereby, the added organic binder is combusted while consuming oxygen in the rotary kiln 100, the inside of individual particles constituting the granular substance becomes in a reduction state, which suppresses oxidation of the fluorescent material. As a result, it is possible to produce the glass-coated fluorescent aggregate having high afterglow brightness. Continuous production and mass-production of the glass-coated fluorescent aggregate are enabled by using the rotary kiln 100.SELECTED DRAWING: Figure 1 【課題】残光輝度の高いガラス被覆蛍光骨材を量産できるガラス被覆蛍光骨材の製造方法を提供する。【解決手段】蛍光材とガラス粉末とが混合された混合原料に水溶性の有機バインダを外割で０．０５ｗｔ％以上２．００ｗｔ％以下添加して粒状物を生成する工程と、生成された粒状物を内燃式のロータリーキルン１００で焼成する工程と、を含む。これにより、添加された有機バインダがロータリーキルン１００内の酸素を消費しながら燃焼し、粒状物を構成する個々の粒子の内部が還元状態となるため、蛍光材の酸化が抑制される。その結果、残光輝度の高いガラス被覆蛍光骨材を製造できる。また、ロータリーキルン１００を用いることでガラス被覆蛍光骨材の連続生産、量産が可能になる。【選択図】図１