赤泥基陶粒的制备及性能研究

以拜耳赤泥为主要原料,糖蜜酒精废液、玻璃、蔗渣为辅料,制备赤泥基陶粒,采用硬度和显气孔率为主要性能指标,考察各制备因素对陶粒性能的影响,并通过XRD、SEM对陶粒进行表征分析。通过试验得到陶粒的制备工艺:制备原料组配为10 g赤泥、0.7 g Al Cl3、3 g玻璃粉末、0.25 g蔗渣、3.5 g糖蜜酒精废液,焙烧温度950℃,焙烧时间3 h。所制备的陶粒平均硬度为152.8 N,显气孔率为43.04%,磨损率为1.58%。表征分析显示:陶粒中赤泥原有八面沸石组分基本消失;陶粒中出现了非晶态的玻璃相组分;陶粒孔洞丰富,部分内、外孔洞连通。

Study on Preparation and Property of a Red Mud-Based Ceramsite

Red mud-based ceramsite was prepared using red mud as main material and molasses wastewater, glass and bagasse as auxiliary materials. With hardness and apparent porosity as the index, the effects of various preparation factors on the property of the ceramic were investigated. XRD and SEM were also used to characterize the ceramsite. The optimum preparation conditions were as follows: material assembly was red mud 10 g, AlCl30.7 g, glass powder 3 g, bagasse 0.25 g and molasses wastewater 3.5 g; calcination temperature 950 °C; calcination time 3 h. For the red clay-based ceramic, the average hardness, the apparent porosity and the wear ratio were 152.8 N, 43.04% and 1.58%, respectively. Characterization analysis results showed that the faujasite zeolite which existed in the red mud almost disappeared in the ceramsite, and there was amorphous glass phase in the ceramsite. Furthermore, holes are rich in the ceramsite, and the external holes partly connected with the inner ones.