Cambridge Electric Cement: Zero-emissions cement from old concrete paste replacing flux in electric-arc furnaces
剑桥电力水泥:用旧混凝土浆料制成的零排放水泥取代电弧炉中的助熔剂
基本信息
- 批准号:EP/W026104/1
- 负责人:
- 金额:$ 189.52万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2022
- 资助国家:英国
- 起止时间:2022 至 无数据
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
As the world moves towards zero emissions, decarbonising cement is often described as the most difficult challenge. Portland Cement, which is used to make concrete and mortar, is made in tremendous volumes (more than 500 kg per person per year for everyone on the planet), is cheap (~£60/tonne) and has excellent properties for construction. However, it causes a quarter of all the world's industrial emissions, both due to fuel combustion in high-temperature cement kilns, and because the chemistry of converting limestone into clinker, the key ingredient of cement, inevitably causes the release of carbon dioxide. Many alternative compositions of cement are under development, but although some may lead to reduced emissions, none have zero emissions. Two possible approaches to capturing and storing emissions are under development - one capturing all the emissions of a plant and storing them underground, and the other embedding emissions within pre-cast blocks - but neither is yet operating at scale, and both face many challenges.Without cement, we will have no concrete, and construction will have to change radically largely shifting from new-build to retrofit and adaption. Countries responsible for around 70% of the world's GDP have now committed to zero emissions targets by 2050 or 2060, so the problem of cement emissions is both large and urgent. This proposal explores the world's first process that could produce Portland cement with no emissions. The investigators noticed that the lime-flux used in today's electric steel-recycling furnaces has almost the same chemical composition as that of old cement paste - the material that is left when old concrete is crushed, and sand and aggregate is removed. In preliminary trials, using the small electric arc furnace of the Material Processing Institute, we replaced the conventional flux with used cement. We separated the hot liquid slag that floats on the surface of molten steel during recycling and cooled it to form a powder which we then mixed with gypsum and cast into small cement samples. Analysis of our tiny pilot study cement samples showed that they were very similar to conventional Portland cement. This points to the exciting possibility that we could make cement as a by-product of steel recycling, which could be powered by non-emitting electricity - therefore giving us both zero emissions steel and zero emissions cement.This proposal aims to explore the science around this discovery. We need to find out how the composition of old cement varies, and how this variation affects our new product. We need to explore what effect our new process has on conventional steel recycling - does it change the composition of the steel, does it damage the furnace lining, and how does the type of steel being recycled affect our new cement? And we need to find out more about the properties of our new cement: how durable is it, how quickly does it reach full strength, and so on.If this new process is as good as we hope, we will want to develop it rapidly to commercial scale, and the technique for making it could become a major UK export. The final component of our proposal is therefore to develop a "roadmap" for taking the idea from lab-scale trials to full deployment. We will explore this question with a consortium of partners, a science advisory panel, and with outward facing partners who could help us champion the new approach.
随着世界向零排放迈进,脱碳水泥通常被描述为最困难的挑战。用于制造混凝土和砂浆的波特兰水泥产量巨大(地球上每个人每年人均超过500公斤),价格便宜(约60英镑/吨),具有优异的建筑性能。然而,它造成了世界上所有工业排放量的四分之一,这既是由于高温水泥窑中的燃料燃烧,也是因为将石灰石转化为水泥关键成分熟料的化学过程不可避免地导致二氧化碳的释放。目前正在开发许多替代水泥成分,尽管其中一些可能会减少排放,但没有一种是零排放。目前正在开发两种可能的捕获和储存排放物的方法--一种是捕获工厂的所有排放物并将其储存在地下,另一种是将排放物埋在预制块中--但这两种方法都还没有大规模运行,而且都面临许多挑战。没有水泥,我们就没有混凝土,建筑将不得不发生根本性变化,主要是从新建转向改造和适应。占世界GDP约70%的国家现在已经承诺到2050年或2060年实现零排放目标,因此水泥排放问题既大又紧迫。该提案探索了世界上第一个可以生产无排放波特兰水泥的工艺。研究人员注意到,今天的钢铁回收电炉中使用的石灰熔剂与旧水泥浆的化学成分几乎相同-旧水泥浆是旧混凝土破碎后留下的材料,沙子和骨料被去除。在初步试验中,使用材料加工研究所的小型电弧炉,我们用用过的水泥代替了传统的焊剂。我们将回收过程中漂浮在钢水表面的热液态炉渣分离出来,并将其冷却形成粉末,然后将其与石膏混合并浇铸成小水泥样品。对我们的小型试点研究水泥样品的分析表明,它们与传统的波特兰水泥非常相似。这就意味着我们可以利用钢铁回收的副产品来生产水泥,而水泥可以由无排放的电力提供动力,从而为我们提供零排放钢铁和零排放水泥。该提案旨在探索围绕这一发现的科学。我们需要找出旧水泥的成分如何变化,以及这种变化如何影响我们的新产品。我们需要探索我们的新工艺对传统的钢铁回收有什么影响-它是否改变了钢铁的成分,是否损坏了炉衬,以及回收的钢铁类型如何影响我们的新水泥?而且我们需要更多地了解我们的新水泥的特性:它有多耐用,多快达到全强度,等等。如果这种新工艺和我们希望的一样好,我们将希望迅速发展到商业规模,制造它的技术可能成为英国的主要出口产品。因此,我们建议的最后一个组成部分是制定一个“路线图”,将这个想法从实验室规模的试验带到全面部署。我们将与一个合作伙伴联盟、一个科学咨询小组以及能够帮助我们支持新方法的外向型合作伙伴探讨这个问题。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Julian Allwood其他文献
Julian Allwood的其他文献
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{{ truncateString('Julian Allwood', 18)}}的其他基金
UK FIRES: Locating Resource Efficiency at the heart of Future Industrial Strategy in the UK
英国火灾:将资源效率置于英国未来产业战略的核心
- 批准号:
EP/S019111/1 - 财政年份:2019
- 资助金额:
$ 189.52万 - 项目类别:
Research Grant
HOSANA! Hole Systems Analysis: An integrated view of eTech element security and impacts, from deposits to products and beyond.
和散那!
- 批准号:
NE/L001632/1 - 财政年份:2013
- 资助金额:
$ 189.52万 - 项目类别:
Research Grant
Precision guided flexible forming: closed-loop control of geometry and properties for high value metal component manufacture
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EP/K018108/1 - 财政年份:2013
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$ 189.52万 - 项目类别:
Research Grant
UK Indemand: a National Research Centre for reducing Industrial Energy and Material use in supplying UK needs
UK Indemand:减少工业能源和材料使用以满足英国需求的国家研究中心
- 批准号:
EP/K011774/1 - 财政年份:2013
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$ 189.52万 - 项目类别:
Research Grant
Step change material efficiency for steel and aluminium.
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- 批准号:
EP/G007217/1 - 财政年份:2009
- 资助金额:
$ 189.52万 - 项目类别:
Fellowship
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