Glass cUllet conversIon To wAteRglass and used, with cement bypass flue dust, for cementless concrete building products (GUITAR)

水玻璃(硅酸钠)是一种商品工业化学品，以粉末或水溶液的形式出售，用于化合物配方、纺织品和木材加工以及陶瓷、硅胶和其他材料的制造。水玻璃是通过将纯碱(Na2CO3)和石英/硅砂(SiO_2)熔化在一起，在高耗能的过程(1100-1200°C)中制备的，从而产生一种被称为小块的无定形材料。然后，将碎玻璃与水和加压蒸汽混合，产生水溶液。GUITAR将展示一种适用于生产“无水泥”混凝土产品的水玻璃制造工艺，该工艺与水泥旁路烟尘(水泥生产的废流)和/或磨细的高炉矿渣(GGBS，钢铁生产的副产品)一起使用时，可以生产“无水泥”混凝土产品。最终产品将是蒸压加气混凝土砌块、标准密度砌块和预装袋的单组分粘结剂(GGBS和水玻璃)，这些粘结剂不使用任何波特兰水泥，而是使用废物取代它。这些产品对环境的影响将比目前市场上的低得多。该项目将探索所需的制备和净化策略，以提供相当于作为商品散装化学品生产的水玻璃，用于洗涤剂(水玻璃最大的单一市场)和造纸。2016年全球水玻璃市场规模估计为86亿美元，预计到2022年将达到110亿美元，欧盟占有约20%的市场份额。欧盟每年的生产能力超过200万吨。新的水玻璃生产工艺的竞争优势来自于它对环境的较低影响和较低的生产成本。它对环境有两方面的好处：较低的工艺温度(约150摄氏度，而不是1100摄氏度)和使用废玻璃碎玻璃而不是原始材料(纯石英/硅砂)。利用废玻璃碎玻璃生产水玻璃的成本估计为100 GB/吨(约95%的成本为NaOH)。相比之下，商用水玻璃溶液的市场价格约为500-1000美元/吨，随着对二氧化碳排放的惩罚和相应的能源投入成本增加，预计价格将进一步上涨。

Waterglass (sodium silicate) is a commodity industrial chemical, sold as a powder or water solution, and used in compound formulations, for processing textiles and lumber, and in the manufacture of ceramics, silica gel and other materials. Waterglass is prepared by melting together soda (Na2CO3) and quartz/silica sand (SiO2), in an energy-demanding process (1100-1200 °C) to produce an amorphous material known as cullet. The cullet is then mixed with water and pressurised steam to produce an aqueous solution. The development of a robust technology for making waterglass from waste glass is highly desired by the bulk industrial chemical industry.GUITAR will demonstrate a manufacturing process for waterglass suitable for producing "cementless" concrete products when used together with cement bypass flue dust (a waste stream from the manufacture of cement) and/or Ground Granulated Blast Furnace Slag (GGBS, a by-product from steel production). The end products will be autoclaved aerated concrete building blocks, normal density blocks, and a pre-bagged one part binder (GGBS with waterglass) that do not use any Portland cement, instead using waste materials to replace it.These products will have a significantly lower environmental impact those currently on the market.The project will explore the preparation and purification strategies required to deliver waterglass equivalent to that produced as a commodity bulk chemical for use in detergents (the largest single market for waterglass) and paper production. The 2016 global market size of sodium silicate was estimated at $8.6 billion and is projected to reach $11.0 billion by 2022, with the EU sharing approximately 20% of the market. EU production capacity exceeds 2 million tonnes per annum.The competitive advantage of the new waterglass production process arises from its lower environmental impact and its lower cost of production. There are two-fold environmental benefits: lower process temperature (around 150 °C instead of \>1100°C) and use of waste glass cullet rather than virgin material (pure quartz/silica sand). The production cost for waterglass from the waste glass cullet is estimated at £100 £/tonne (about 95% cost being NaOH). In comparison, the market price of commercially available sodium silicate solution is of the order $500-$1000/tonne, and it is expected to further increase with increasing penalties for C02 emissions and consequent energy input costs.