CARBACEM - Creating valuable secondary resources for cement production from hazardous wastes produced by aluminium production, generating sustainable, resource efficiencies for both.

该项目旨在连接原金属(铝)和水泥生产两大基础行业，为两者带来显著的环境、经济和资源效益。原铝行业规模庞大，2020年全球产量为6529.6万吨。它会产生许多难处理的废物，包括废锅衬垫(SPL)。SPL在英国、欧盟、美国和其他地方被指定为危险废物，因为：*它含有有毒的钠、氟和氰化物化合物，可在水中浸出。*它具有腐蚀性--由于碱金属和氧化物，具有高PH值。*它与产生水的易燃、有毒和爆炸性气体发生反应。2020年，大约产生了180万吨SPL。SPL废物几乎没有好的处理选择，只要有，就是昂贵的。然而，SPL含有有价值的成分，如碳、氧化铝和氟化物，如果处理得当，这些成分可以变得安全，并成为其他行业的宝贵原料，取代主要原料，特别是水泥。全球水泥行业规模更大，2018年生产39.9亿吨……水泥生产对环境造成严重的不利影响，需要大量的能源和矿物开采。它是人为二氧化碳排放的第二大贡献者。行业认识到这一点，并努力减少其对环境的影响。由化学家、化学工程师和废物专家组成的英国公司Ultromex开发了一套新的工艺来处理SPL，该工艺以经济的价格促进铝冶炼和水泥生产之间的互惠共生，使用Ultromex的几个关键创新：1.将SPL缩小到适合化学处理的颗粒尺寸的独特低能量技术。2.创新的工艺不产生气体，消除了处理过程中对昂贵的减排基础设施的需要，并使SPL安全。3.用于选择性去除SPL中不受欢迎的污染物的新的化学工艺方法，根据个别水泥生产商的需要保留理想的水泥该项目为铝行业解决了一个棘手的废物问题，使危险废物远离垃圾填埋场，同时为水泥生产提供了大量的二次资源，包括碳、氧化铝和硅酸盐以及矿化剂，减少了其环境足迹。该项目对这两个行业的经济和资源效率具有潜在的重大积极影响，对社会具有巨大的环境和可持续效益。

This project aims to connect 2 major foundation industries, primary metal (aluminium) and cement production, yielding significant environmental, economic & resource efficiency benefits for both.The primary aluminium industry is large in scale with 65.296 million tonnes produced globally in 2020\. It creates a number of difficult waste streams including Spent Pot Liner (SPL).SPL is designated as hazardous waste in the UK, EU, USA and elsewhere because:* It contains toxic sodium, fluoride and cyanide compounds leachable in water.* It is corrosive - having high pH due to alkali metals and oxides.* It reacts with water - producing flammable, toxic and explosive gases.Around 1.8 million tonnes of SPL were produced in 2020\. SPL waste has few good disposal options which, where available, are expensive.However, SPL contains valuable constituents, such as carbon, aluminium oxides and fluorides which could, with the right treatment, be made safe and become valuable feedstocks for other industries, displacing primary feedstocks, particularly for cement.The global cement industry is even larger, with 3.99B tonnes produced in 2018\. Cement production causes significant adverse environmental impacts, with extensive energy and mineral extraction requirements. It is the second biggest contributor of anthropogenic CO2 emissions. The industry recognises this and works hard to reduce its environmental impact.Ultromex a UK company, formed by chemists, chemical engineers and waste experts, have developed a novel set of processes to treat SPL at an economic price point which can facilitate a mutually beneficial symbiosis between aluminium smelting and cement production, using several key Ultromex innovations:1.Unique low energy technology for downsizing SPL to a particle size suitable for chemical treatment.2.Innovative processes generating no gases removing the need for expensive abatement infrastructure during treatment and rendering SPL safe.3.Novel chemical process methods for the selective removal of non-desirable contaminants in SPL, retaining desirable ones according to the needs of the individual cement producerThe project solves a difficult waste problem for the aluminium industry, keeps hazardous waste out of landfill while providing a large supply of secondary resources for cement production including carbon, alumina & silicates and mineralising agents, reducing its environmental footprint.The project has the potential significant positive impacts for the economics & resource efficiencies of both industries, with massive environmental & sustainability benefits for society.