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量的较大部分是由于石灰石的煅烧造成的。通过使用辅助胶凝材料 (SCM)，如天然火山灰、高炉矿渣、粉煤灰和石灰石填料，降低熟料与水泥的比例，可以减少这一比例。由于火山的形成，天然火山灰在一些国家储量丰富，但在英国或爱尔兰则不然。随着到 2025 年强制关闭燃煤发电站，高炉残渣和粉煤灰变得越来越稀缺。该项目将完成一项深入的可行性研究，探讨利用爱尔兰北部丰富的粘土矿床生产天然煅烧火山灰 (NCP) 形式的人造 SCM 用于水泥生产的可能性。此举旨在取代目前用作 SCM 的副产品，如粉煤灰 (PFA) 和粒状高炉矿渣 (GGBS)，这些副产品目前在英国的供应量正在减少。该项目还将检验在以前用于熟料生产的现有标准回转窑中加工该产品的商业可行性。

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.