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发明公开
CN101811712A 一种利用流化床粉煤灰制备冶金级氧化铝的方法 无效 - 撤回

一种利用流化床粉煤灰制备冶金级氧化铝的方法
摘要：
本发明公开了一种利用流化床粉煤灰为原料制备冶金级氧化铝的方法，所述方法包括：a)将粉煤灰粉碎后经湿法磁选除铁；b)将磁选后的粉煤灰与盐酸反应得到盐酸浸液；c)将盐酸浸液通过大孔型阳离子树脂柱深度除铁，得到精制氯化铝溶液；d)将精制氯化铝溶液浓缩、结晶得结晶氯化铝；e)将结晶氯化铝煅烧分解，即得冶金级氧化铝。本发明工艺简单、生产过程易于控制、氧化铝提取率高、生产成本低、产品质量稳定。
摘要（英）：

The invention discloses a method for preparing metallurgical-grade aluminum oxide by using fluid-bed fly ash as a raw material. The method comprises the following steps: a) crushing the fly ash and then removing iron through wet magnetic separation; b) reacting the magnetically-separated fly ash with hydrochloric acid to form hydrochloric acid extract; c) feeding the hydrochloric acid extract into a macroporous cationic resin column to deeply remove iron so as to obtain refined aluminum chloride solution; d) concentrating and crystallizing the refined aluminum chloride solution to obtain crystallized aluminum chloride; and e) calcining and decomposing the crystallized aluminum chloride to obtain the metallurgical-grade aluminum oxide. The method has the advantages of simple process, easy control of production processes, high aluminum oxide extracting rate, low production cost and stable product quality.

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