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Chlorination-resistant carbonized refractory material and preparation method thereof
The invention discloses an anti-chlorination carbonized refractory material and a preparation method thereof. According to the material, potassium-containing low-aluminum mullite is used as an aggregate, potassium-containing low-aluminum mullite, silicon carbide and binding clay are used as matrixes, and the materials are mixed by an edge runner mill, aged and then mechanically pressed. And drying the green body, and sintering the dried green body in a high-temperature kiln in an oxidizing atmosphere at the highest sintering temperature of 1490-1550 DEG C. During firing, oxygen partial pressure of a green brick is gradually reduced from outside to inside, silicon carbide on the surface of the brick is oxidized to form a cristobalite phase, and the cristobalite phase is gradually dissolved under the action of a potassium-containing liquid phase to form a high-silica glass phase to fill pores on the surface of the brick, so that the porosity of the surface layer of the brick is greatly reduced, and a protective layer similar to an enamel layer is formed; the protective layer can greatly prolong the service life of the chlorination furnace for producing titanium dioxide by a chlorination process.
本发明公开了一种抗氯化碳化耐火材料及制备方法。这种材料以含钾低铝莫来石为骨料，含钾低铝莫来石、碳化硅、结合粘土为基质，经轮碾机混合，睏料后机压成型。坯体经干燥后，在高温窑炉内氧化气氛下进行烧成，最高烧成温度为1490℃‑1550℃。烧成时，砖坯由外向内氧分压会逐步降低，砖表面碳化硅氧化，形成方石英相，方石英相在含钾液相的作用下会逐渐溶解，形成高硅玻璃相，填充砖表面气孔，大大降低了砖表层气孔率，形成类似釉层的保护层，该保护层能够大大延长氯化法生产钛白粉用氯化炉的使用寿命。
Chlorination-resistant carbonized refractory material and preparation method thereof
The invention discloses an anti-chlorination carbonized refractory material and a preparation method thereof. According to the material, potassium-containing low-aluminum mullite is used as an aggregate, potassium-containing low-aluminum mullite, silicon carbide and binding clay are used as matrixes, and the materials are mixed by an edge runner mill, aged and then mechanically pressed. And drying the green body, and sintering the dried green body in a high-temperature kiln in an oxidizing atmosphere at the highest sintering temperature of 1490-1550 DEG C. During firing, oxygen partial pressure of a green brick is gradually reduced from outside to inside, silicon carbide on the surface of the brick is oxidized to form a cristobalite phase, and the cristobalite phase is gradually dissolved under the action of a potassium-containing liquid phase to form a high-silica glass phase to fill pores on the surface of the brick, so that the porosity of the surface layer of the brick is greatly reduced, and a protective layer similar to an enamel layer is formed; the protective layer can greatly prolong the service life of the chlorination furnace for producing titanium dioxide by a chlorination process.
本发明公开了一种抗氯化碳化耐火材料及制备方法。这种材料以含钾低铝莫来石为骨料，含钾低铝莫来石、碳化硅、结合粘土为基质，经轮碾机混合，睏料后机压成型。坯体经干燥后，在高温窑炉内氧化气氛下进行烧成，最高烧成温度为1490℃‑1550℃。烧成时，砖坯由外向内氧分压会逐步降低，砖表面碳化硅氧化，形成方石英相，方石英相在含钾液相的作用下会逐渐溶解，形成高硅玻璃相，填充砖表面气孔，大大降低了砖表层气孔率，形成类似釉层的保护层，该保护层能够大大延长氯化法生产钛白粉用氯化炉的使用寿命。
Chlorination-resistant carbonized refractory material and preparation method thereof
一种抗氯化碳化耐火材料及制备方法
FAN MUXU (author) / TAN QINGHUA (author) / WANG HAN (author) / FENG ZHIYUAN (author) / WU HAOTIAN (author) / ZHANG TAO (author) / SHI PENGKUN (author) / WANG QI (author) / LI SENYIN (author)
2023-06-09
Patent
Electronic Resource
Chinese
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