中钛渣耦合煤矸石制备路基材料的研究
首发时间:2020-12-10
摘要:中钛渣是高炉冶炼钒钛磁铁矿产生的工业废渣,同时这些废渣也是宝贵的二次资源。因此,本文采用中钛渣分别耦合纯二氧化硅粉末、煤矸石制备路基材料,从而实现对中钛渣资源的大宗利用。在中钛渣耦合纯二氧化硅的实验中发现,当二氧化硅的添加量为54.5%的时,升高到1175℃并保温2小时制备的路基石试样抗压强度最大,达到55.36MPa,接近硬质岩石标准(60MPa)。并且随着二氧化硅添加量的增加,透辉石的含量减小,样品的力学性能越差。而在中钛渣耦合煤矸石的实验中发现,煤矸石的添加量为57.9%的样品升高到1230℃并保温2小时制备的路基石试样抗压强度最大,抗压强度达到58.21MPa,略高于掺加纯二氧化硅粉末的最大抗压强度,接近硬质岩石标准(60MPa)。并且随着煤矸石添加量的增加,铝透辉石含量越小,样品的力学性能越差。研究结果表明,煤矸石可以代替纯二氧化硅粉末与中钛渣耦合制备路基石,以大幅度降低实际生产成本。
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Study on Preparation of Roadbed Materials by Medium Titanium Slag Coupled with Coal Gangue
Abstract:Medium-titanium blast furnace slag is an industrial waste slag produced by blast furnace smelting of vanadium-titanium magnetite, meanwhile these waste slags are also valuable secondary resources. The experiment of medium titanium slag coupled with pure silica powder shows that the compressive strength of the sample raised to 1175℃ and kept for 2 hours with 54.5% pure silica added was the highest. The compressive strength reaches 58.21MPa, close to the hard rock standard (60MPa). And with the increase of silica addition, the content of diopside decreases, and the mechanical properties of the sample are worse. The experiment of medium titanium slag coupled with coal gangue shows that the compressive strength of the sample raised to 1230 C and kept for 2 hours with 57.9% coal gangue added was the highest. The compressive strength reached 58.21 MPa, close to the hard rock standard (60MPa), which is slightly larger than the maximum compressive strength of 55.36MPa mixed with pure silica powder. As the amount of coal gangue increases, the content of aluminum diopside decreases, and the mechanical properties of coal samples are worse. The research results show that coal gangue can replace pure silica powder and medium titanium slag to prepare roadbed stones, which greatly reduce the actual production cost.
Keywords: medium titanium slag silica coal gangue;road cornerstone
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