Preparation, structure and performance of steel slag-manganese slag compound fertilizer
WANG Zhao-ran1, YU Qiao-di1, LI Can-hua1, LI Yan-ling2, WU Wen-bin2
1. School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243002, Anhui, China; 2. Guangxi Liugang Environmental Protection Co., Ltd., Liuzhou 545002, Guangxi, China; 3. Research Institute of Industrial Technology of AHUT at Xuancheng, Xuancheng 242000, Anhui, China
Abstract：In order to explore the feasible way of coupling utilization of bulk solid waste in multiple industries of steel slag and manganese slag, this article uses the hydration properties of manganese slag and steel slag to prepare a steel slag-manganese slag compound fertilizer, and uses scanning electron microscope (SEM), X-ray diffraction analysis (XRD), fluorescence X-ray (XRF), ultraviolet spectrophotometer, inductively coupled plasma emission spectrometer and other methods to analyze the microstructure, phase, composition, leaching toxicity and other physical and chemical properties of compound fertilizer. The results show that the best mass percentage of steel slag and manganese slag in compound fertilizer is 9∶1, the bulk density is 1.019 g/cm3, the apparent density is 1.942 g/cm3, the water absorption rate is 15.23%, and the barrel compression strength is 2.28 MPa, With evacuated capillary structure inside, the main phases are silicates, hydrated silicates, hydrated phosphates, quartz, and dicalcium silicate. The compound fertilizer has high Si, Ca, Fe, Mg and other medium and trace elements that are beneficial to plant growth, its effective silicon mass fraction is 18.876%, and its toxicity test complies with the national fertilizer testing standards.
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2021, Vol. 31 
