The Influence of Mineralogical, Chemical and Physical Properties on Grindability of Commercial Clinkers with High MgO Level
The Influence of Mineralogical, Chemical and Physical Properties on Grindability of Commercial Clinkers with High MgO Level
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DOI：
10.1016/j.cemconres.2008.02.011
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发表时间：
2008-08
影响因子：
11.4
通讯作者：
V. C. G. Souza;J. Koppe;J. Costa;A. Vargas;E. Blando;R. Hübler
中科院分区：
文献类型：
--
作者：
V. C. G. Souza;J. Koppe;J. Costa;A. Vargas;E. Blando;R. Hübler
本研究探讨了各种方法，能够识别可能的矿物学，物理和化学的影响，商业熟料的易磨性与高MgO水平。研究的目的是评估熟料矿物相的硬度和弹性模量及其在粉碎过程中的断裂强度，比较低MgO含量（0.5%）和高MgO含量（>5.0%）的熟料样品。利用光学显微镜、Rietveld精修X射线衍射（XRD）和X射线荧光（XRF）等分析技术研究了矿物学、化学和物理性质的影响。这些技术在鉴定不同熟料样品方面很有用。采用落锤试验和邦德球磨机可磨性试验对水泥熟料的力学性能进行了表征。还进行了纳米压痕测试。从邦德球磨机可磨性测试的结果被认为是有关的矿物相的硬度和矿物学特性，如类型和数量的夹杂物中的硅酸盐，贝利特和阿利特晶体形状，或微裂纹阿利特。与此相反，DWT得到的结果与宏观特征的熟料，如孔隙度，以及硬度和矿物学特征的贝利特晶体簇。硬度仪器测试有助于确定维氏硬度和弹性模量的矿物相在商业熟料，并产生不同的值相比，以前的出版物的纯相。
This research investigates various methods able to identify possible mineralogical, physical and chemical influences on the grindability of commercial clinkers with high MgO level. The aim of the study is to evaluate the hardness and elastic modulus of the clinker mineral phases and their fracture strength during the comminution processes, comparing samples from clinkers with low MgO level (0.5%) and clinkers with elevated MgO levels (>5.0%). The study of the influence of mineralogical, chemical and physical properties was carried out using several analytical techniques, such as: optical microscopy, X-ray diffraction with Rietveld refinement (XRD) and X-ray fluorescence (XRF). These techniques were useful in qualifying the different clinker samples. The drop weight test (DWT) and the Bond ball mill grindability test were performed to characterize the mechanical properties of clinkers. Nanoindentation tests were also carried out. Results from the Bond ball mill grindability test were found to be related to the hardness of the mineral phase and to mineralogical characteristics, such as type and amount of inclusions in silicates, belite and alite crystals shape, or microcracked alites. In contrast, the results obtained by the DWT were associated to the macro characteristics of clinkers, such as porosity, as well as to the hardness and mineralogical characteristics of belite crystals in clusters. Hardness instrumented tests helped to determine the Vickers hardness and elastic modulus from the mineral phases in commercial clinkers and produced different values for the pure phases compared to previous publications.