CINVESTAV IPN-Unidad Saltillo, Ramos Arizpe, Coahuila, Mexico.
J Hazard Mater. 2010 Sep 15;181(1-3):82-90. doi: 10.1016/j.jhazmat.2010.04.096. Epub 2010 May 23.
The properties of coal fly ash are strongly dependent on the geological origin and the combustion process of the coal. It is important to characterize regional fly ash in detail to ascertain its potential uses as raw material in the production of high value products. The physicochemical properties of fly ash coming from the "Jose Lopez Portillo" coal-fired power plant, Coahuila, Mexico (MFA), are presented in this work. A detailed study of trace elements, the chemical composition of the amorphous phase, thermal stability and the leaching of contaminant elements under different conditions are included. MFA is composed of mullite, quartz, calcite, magnetite and an amorphous phase. This material contains mainly silica (59.6%), alumina (22.8%) and magnetite (5.6%). Its amorphous phase (78.3%) has a high silica (49.4%) and alumina (14.4%) content. According to its mineralogical and chemical composition, MFA is potentially useful as a raw material for making cement, silica, and alumina, as well as low silica/alumina ratio zeolites. Deleterious elements could be removed during the zeolitization process or with an additional acid treatment. Because of its morphological properties and structural and thermal stability, MFA can be used in thermal isolation and refractory materials and as a support for heterogeneous catalysts.
煤飞灰的性质强烈依赖于煤的地质起源和燃烧过程。详细描述区域飞灰以确定其作为生产高价值产品原料的潜在用途非常重要。本文介绍了来自墨西哥科阿韦拉州“何塞·洛佩斯·波蒂略”燃煤电厂（MFA）的飞灰的物理化学性质。对微量元素、无定形相的化学成分、热稳定性以及在不同条件下污染物元素的浸出进行了详细研究。MFA 由莫来石、石英、方解石、磁铁矿和无定形相组成。该材料主要含有二氧化硅（59.6%）、氧化铝（22.8%）和磁铁矿（5.6%）。其无定形相（78.3%）具有较高的二氧化硅（49.4%）和氧化铝（14.4%）含量。根据其矿物学和化学成分，MFA 可用作制造水泥、硅和氧化铝的原料，以及低硅/铝比沸石。在沸石化过程或额外的酸处理过程中，可以去除有害元素。由于其形态特性以及结构和热稳定性，MFA 可用作隔热和耐火材料以及多相催化剂的载体。
