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Preparation method of Bayer process red mud-based cementing material
The invention relates to a preparation method of a Bayer process red mud-based cementing material, which comprises the following steps: providing red mud generated in the process of producing aluminum oxide by a Bayer process, and dewatering the red mud by a screening machine to obtain a filter cake with predetermined granularity; drying the filter cake until the preset water content is reached; and mixing the filter cake with an excitation composite additive, a stabilizing additive, a curing agent, a reinforcing agent and a retarder to obtain the Bayer process red mud-based cementing material. The red mud is directly subjected to filter pressing to form a filter cake, then the filter cake is treated until the filter cake has proper water content and particle size, and then the filter cake is mixed with other ingredients to form the Bayer process red mud-based cementing material. Meanwhile, elements such as Si, Al, Fe and Na in the red mud are fully utilized; the red mud does not need to be complexly treated in the whole process, and the process is simple; the whole red mud is used as a raw material, and no other waste is generated; the whole process is free of heating and low in energy consumption.
本申请涉及一种拜耳法赤泥基胶凝材料的制备方法包括如下步骤：提供拜耳法生产氧化铝过程中产生的赤泥，以筛分机对所述赤泥进行除水，得到具有预定粒度的滤饼；干燥所述滤饼至达到预定含水量；将所述滤饼与激发复合助剂、稳定助剂、固化剂、增强剂、缓凝剂混合，得到所述拜耳法赤泥基胶凝材料。本申请通过将赤泥直接压滤形成滤饼，再将滤饼处理至具有合适的含水量和粒度，再与其它配料混合成所述拜耳法赤泥基胶凝材料。同时，充分利用了赤泥中的Si、Al、Fe、Na等元素；全程不需要对赤泥进行复杂处理，工艺简单；将赤泥整体作为原料，不产生其它废料；全程无加热，能耗低。
Preparation method of Bayer process red mud-based cementing material
The invention relates to a preparation method of a Bayer process red mud-based cementing material, which comprises the following steps: providing red mud generated in the process of producing aluminum oxide by a Bayer process, and dewatering the red mud by a screening machine to obtain a filter cake with predetermined granularity; drying the filter cake until the preset water content is reached; and mixing the filter cake with an excitation composite additive, a stabilizing additive, a curing agent, a reinforcing agent and a retarder to obtain the Bayer process red mud-based cementing material. The red mud is directly subjected to filter pressing to form a filter cake, then the filter cake is treated until the filter cake has proper water content and particle size, and then the filter cake is mixed with other ingredients to form the Bayer process red mud-based cementing material. Meanwhile, elements such as Si, Al, Fe and Na in the red mud are fully utilized; the red mud does not need to be complexly treated in the whole process, and the process is simple; the whole red mud is used as a raw material, and no other waste is generated; the whole process is free of heating and low in energy consumption.
本申请涉及一种拜耳法赤泥基胶凝材料的制备方法包括如下步骤：提供拜耳法生产氧化铝过程中产生的赤泥，以筛分机对所述赤泥进行除水，得到具有预定粒度的滤饼；干燥所述滤饼至达到预定含水量；将所述滤饼与激发复合助剂、稳定助剂、固化剂、增强剂、缓凝剂混合，得到所述拜耳法赤泥基胶凝材料。本申请通过将赤泥直接压滤形成滤饼，再将滤饼处理至具有合适的含水量和粒度，再与其它配料混合成所述拜耳法赤泥基胶凝材料。同时，充分利用了赤泥中的Si、Al、Fe、Na等元素；全程不需要对赤泥进行复杂处理，工艺简单；将赤泥整体作为原料，不产生其它废料；全程无加热，能耗低。
Preparation method of Bayer process red mud-based cementing material
一种拜耳法赤泥基胶凝材料的制备方法
GAO JIANYANG (author) / LIU SHIJIE (author) / ZHENG XIA (author) / ZHOU KAI (author) / ZHAO GUANNAN (author) / LI YING (author) / JI MENG (author) / LIU XIANGYU (author)
2023-07-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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