Study of the feasibility of producing artificial pozzolana at existing cement facility for use as an alternative raw material in Portland Cement

水泥生产中二氧化碳排放的较大份额是由于石灰石的煅烧。这一比例可以通过使用辅助胶凝材料(SCM)，如天然火山灰、高炉炉渣、飞灰和石灰石填料来降低熟料与水泥的比例。由于火山形成，天然火山灰在一些国家很多，但在英国和爱尔兰就不是这样了。随着2025年燃煤电厂的强制关闭，高炉炉渣和飞灰变得越来越稀缺。该项目将完成一项深入的可行性研究，探讨利用北爱尔兰丰富的粘土矿藏生产天然煅烧火山灰(NCPs)形式的人造SCM用于水泥生产的可能性。这将旨在取代副产品，如粉状燃料灰(PFA)和粒状磨细高炉炉渣(GGBS)，这些副产品目前在英国用作SCM，但其可用性正在下降。此外，还将研究在以前用于熟料生产的现有标准回转窑中加工产品的商业可行性。

The larger share of CO2 emissions in cement production is due to the calcination of limestone. This share can be mitigated through a process that reduces the clinker-cement ratio, using supplementary cementitious materials (SCM) such as natural pozzolans, blast furnace slags, fly ash and limestone filler.Natural pozzolans are plentiful in some countries due to volcanic formation, but not in the UK or Ireland. Blast furnace residue and fly ash are becoming increasingly scarce following the mandatory closure of coal-fired power stations by 2025\.This project will complete an in-depth feasibility study into the possibility of using abundant clay deposits in N.Ireland to produce an artificial SCM in the form of Natural Calcined Pozzolans (NCPs) for use in cement production. This will be aimed at replacing by-products such as Pulverised Fuel Ash (PFA) and Granulated Ground Blastfurnace Slag (GGBS) which are currently used as SCMs but are in decreasing availability in the UK.It will also examine the commercial viability of processing the product in an existing standard rotary kiln used previously for clinker production.