Experimental Investigation and Modeling of Sulfoaluminate Cement Preparation Using Desulfurization Gypsum and Red Mud

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• 作者：Wenlong Wang ; Xujiang Wang ; Jianping Zhu ; Peng Wang ; Chunyuan Ma
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：January 23, 2013
• 年：2013
• 卷：52
• 期：3
• 页码：1261-1266
• 全文大小：214K
• 年卷期：v.52,no.3(January 23, 2013)
• ISSN：1520-5045

文摘

Desulfurization gypsum, the byproduct from wet flue gas desulfurization, and red mud, from the production of aluminum oxide, are two bulk industrial solid wastes that trigger many local environmental problems in China. This study aims to jointly utilize them. Through experimentation and modeling using FactSage, it has been found to be feasible to prepare sulfoaluminate cement using these wastes. The calcination temperature in the preparation was as low as 1250鈥?300 掳C, and the main mineral phases of the cement clinker were 3CaO路3Al₂O₃, CaSO₄, 尾-2CaO路SiO₂, and 2CaO路Fe₂O₃. The cement clinkers tested showed excellent mechanical strength performances. This process was found to be an efficient way to consume industrial solid wastes, with the total proportion of desulfurization gypsum and red mud over 70鈥?0% by mass in the raw materials. The sulfoaluminate cement products have outstanding cost superiority over Portland cement because of their low material costs, low material pretreatment costs, and low calcination temperature. Moreover, this technology could bring about immense environmental and social benefits in terms of waste consumption, energy conservation, and CO₂ reductions. This technology has considerable prospects, and it is worth undertaking further research into its potential applications.