In this work, the feasibility of obtaining Alite and Belite with possible applications in the cement industry from the primary sludge generated by a paper recycling industry in the State of Santa Catarina, Brazil was studied. The effect of the heat treatment on the physical and chemical properties of the primary sludge was studied, when treated at 800 °C, 875 °C and 950 °C, and defined by studies using the dilatometry technique. The treated sludge at these temperatures was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), thermal dilatometry (TD), X-ray fluorescence spectroscopy (XRF), surface analysis by the method of Brunauer, Emmett, Teller (BET), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The results showed the appearance of the Alite and Belite phases with different proportions, depending on the temperatures used during the heat treatment processes and with sufficient quality for application in the cement industry, since the optimal condition to obtain Alite is the heat treatment at 950 °C. In addition, the temperatures used were lower than those used in the conventional processes of Alite and Belite.

在这项工作中，研究了从巴西圣卡塔琳娜州造纸回收行业产生的主要污泥中获得Alite和Belite的可能性，并将其应用于水泥工业。当在800°C，875°C和950°C下进行处理时，研究了热处理对主要污泥的物理和化学性质的影响，并通过膨胀分析技术进行了定义。在这些温度下处理过的污泥的特征在于X射线衍射（XRD），傅立叶变换红外光谱（FTIR），热重分析（TGA），热膨胀法（TD），X射线荧光光谱（XRF），表面分析的方法包括布鲁瑙尔（Brunauer），埃米特（Emmett），特勒（Teller）（BET），扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）。结果表明，取决于热处理过程中使用的温度，并且在水泥工业中具有足够的质量，铝相和贝利特相的外观比例不同，因为获得铝相的最佳条件是在950°C下进行热处理C。此外，所使用的温度低于传统的Alite和Belite工艺中使用的温度。