公开(公告)号：US20130343971A1

公开(公告)日：2013-12-26

申请号：US14012983

申请日：2013-08-28

申请人： Inner Mongolia Datang International Recycling Resource Development Co., Ltd.

发明人： JUNMIN SUN ,  Zhanjun Zhang ,  Gang Chen ,  Shaoyong Yan ,  Qizhi Huo ,  Licheng Wu ,  Hongli Xu ,  Lian Qin ,  Xiaoxia Chen

IPC分类号： C01B33/24 ,  C01F7/30

CPC分类号： C01B33/24 ,  C01F7/0693 ,  C01F7/085 ,  C01F7/30

摘要： A method for co-producing alumina and activated calcium silicate from high-alumina fly ash, comprising the steps that: high-alumina fly ash reacts with sodium hydroxide solution to obtain desiliconized solution and desiliconized fly ash; lime cream is added to the desiliconized solution to obtain activated calcium silicate; limestone and sodium carbonate solution are added to the desiliconized fly ash to blend raw slurry, the raw slurry is baked into clinker, and sodium aluminate crude solution is obtained from dissolution of the clinker; the sodium aluminate crude solution is subjected to the processes of first-stage deep desiliconization, second-stage deep desiliconization, carbonization decomposition, seed precipitation and etc to obtain alumina. According to the invention, less material flow and small amount of slag formation are achieved, the energy consumption, material consumption and production cost are low; the extraction rate of alumina is high, and meanwhile, activated calcium silicate with high added value is co-produced.

摘要翻译： 一种从高铝灰飞粉共同生产氧化铝和活性硅酸钙的方法，包括以下步骤：高氧化铝飞灰与氢氧化钠溶液反应得到脱硅溶液和脱硅粉煤灰; 向脱硅溶液中加入石灰膏，得到活化硅酸钙; 将石灰石和碳酸钠溶液加入到脱硅粉末中以混合原料浆，将原料浆料焙烧成熟料，由熟料溶解获得铝酸钠粗溶液; 对铝酸钠粗溶液进行第一阶段深脱硅，二次深脱硅，碳化分解，种子沉淀等工艺，得到氧化铝。 根据本发明，实现了较少的材料流动和少量的炉渣形成，能耗，材料消耗和生产成本低; 氧化铝的提取率高，同时共同生产高附加值的活性硅酸钙。