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Method for preparing beta '-Sialon ceramic material from blast furnace slag
The invention discloses a method for preparing a beta '-Sialon ceramic material by using blast furnace slag, which comprises the following steps: crushing and ball-milling conventional blast furnace slag into fine powder, and leaching with acetic acid twice to obtain filter residues; mixing the filter residues, an aluminum oxide source, ammonium salt and a carbon-based reducing agent, and performing compression molding and drying to obtain a green body; and putting the green body into a high-temperature furnace, introducing high-purity nitrogen, carrying out carbon thermal reduction nitridation synthesis reaction to obtain a beta '-Sialon ceramic blank, and crushing and decarbonizing to obtain the beta'-Sialon ceramic powder. According to the method, Ca, Mg and other elements in the blast furnace slag are separated out through two times of acetic acid leaching, the roasting temperature for preparing the beta '-Sialon ceramic material is reduced, ammonium salt is added to serve as an accelerant to provide a nitrogen source, the carbon thermal reduction nitridation synthesis reaction is enhanced, and the synthesis effect and purity of the beta'-Sialon ceramic material are greatly improved. The preparation method also provides an important application way for high-valued and functional utilization of the blast furnace slag and the industrial aluminum powder.
本发明公开了一种利用高炉渣制备β’‑Sialon陶瓷材料的方法，将常规高炉渣破碎和球磨成微细粉末，经两次乙酸浸出得到滤渣；将滤渣、氧化铝源、铵盐和碳基还原剂混合、模压成型和干燥得到生坯；将生坯置入高温炉内通高纯氮气进行碳热还原氮化合成反应，得到β’‑Sialon陶瓷坯料，再经破碎和除碳得到β’‑Sialon陶瓷粉体。本发明通过两次乙酸浸出将高炉渣中Ca、Mg等元素分离出来，降低了制备β’‑Sialon陶瓷材料的焙烧温度，添加铵盐作为促进剂提供氮源增强了碳热还原氮化合成反应，大大提高β’‑Sialon陶瓷材料的合成效果和纯度。该制法也为高炉渣和工业铝粉的高值化、功能化利用提供了重要的应用途径。
Method for preparing beta '-Sialon ceramic material from blast furnace slag
The invention discloses a method for preparing a beta '-Sialon ceramic material by using blast furnace slag, which comprises the following steps: crushing and ball-milling conventional blast furnace slag into fine powder, and leaching with acetic acid twice to obtain filter residues; mixing the filter residues, an aluminum oxide source, ammonium salt and a carbon-based reducing agent, and performing compression molding and drying to obtain a green body; and putting the green body into a high-temperature furnace, introducing high-purity nitrogen, carrying out carbon thermal reduction nitridation synthesis reaction to obtain a beta '-Sialon ceramic blank, and crushing and decarbonizing to obtain the beta'-Sialon ceramic powder. According to the method, Ca, Mg and other elements in the blast furnace slag are separated out through two times of acetic acid leaching, the roasting temperature for preparing the beta '-Sialon ceramic material is reduced, ammonium salt is added to serve as an accelerant to provide a nitrogen source, the carbon thermal reduction nitridation synthesis reaction is enhanced, and the synthesis effect and purity of the beta'-Sialon ceramic material are greatly improved. The preparation method also provides an important application way for high-valued and functional utilization of the blast furnace slag and the industrial aluminum powder.
本发明公开了一种利用高炉渣制备β’‑Sialon陶瓷材料的方法，将常规高炉渣破碎和球磨成微细粉末，经两次乙酸浸出得到滤渣；将滤渣、氧化铝源、铵盐和碳基还原剂混合、模压成型和干燥得到生坯；将生坯置入高温炉内通高纯氮气进行碳热还原氮化合成反应，得到β’‑Sialon陶瓷坯料，再经破碎和除碳得到β’‑Sialon陶瓷粉体。本发明通过两次乙酸浸出将高炉渣中Ca、Mg等元素分离出来，降低了制备β’‑Sialon陶瓷材料的焙烧温度，添加铵盐作为促进剂提供氮源增强了碳热还原氮化合成反应，大大提高β’‑Sialon陶瓷材料的合成效果和纯度。该制法也为高炉渣和工业铝粉的高值化、功能化利用提供了重要的应用途径。
Method for preparing beta '-Sialon ceramic material from blast furnace slag
一种利用高炉渣制备β’-Sialon陶瓷材料的方法
QIU HOUSEHOLD (author) / QI DEXING (author) / MAO RUI (author) / SONG ZHENGUO (author) / GUO QIUYUE (author) / WEN YINGJIANG (author) / LYU XINYUE (author) / JU DIANCHUN (author) / YU SHUI (author) / LI ZHENG (author)
2024-03-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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