Upgrading the value of BOS slag by addition of difficult to recycle glass or slags

通过添加难以回收的玻璃或炉渣来提升 BOS 炉渣的价值

• 批准号: 50615
• 金额: $ 8.78万
• 依托单位: MATERIALS PROCESSING INSTITUTE
• 依托单位国家: 英国
• 项目类别: Feasibility Studies
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=50615
• 关键词: Upgrading; value; BOS; slag; addition

Steelmaking slag from the integrated route, ie made from blast furnace hot metal, is demetalled, crushed and screened, and used to create tarmac for the top surface of roads. Its rate of arising in the UK is around 500ktpa. However, it's skid resistance is not high enough for the top grade of road surface. For these locations, virgin aggregate has to be imported with its associated quarrying and transport environmental impact. Modifying the slag to increase the silica content after it is tapped from the steelmaking vessel should improve its skid resistance to the level required for the top grade of road surface. The slag modifier could be slags arising elsewhere in the process route, such as desulphurisation slag, for which there is no ready use. Other likely sources of modifier are certain streams arising from the glass industry, including waste streams contaminated by aggregates, mixed colours, and fines, which cannot be returned to the process, and high silica arising refractory waste. Thus this project objective is to use slag arising within the steel industry, and streams of waste glass and refractory from the glass industry, all of which have no ready recycling route, to modify the slag from the steelmaking process. This will then produce an aggregate replacement of higher value.The project will make a number of new slags, at the kg scale, by taking existing steelmaking slag and modifying with a number of alternative high silica sources. Thermodynamic modelling will be used to define the mixtures to achieve the aim mineralogy. The slags will be tested to assess the improvement in skid resistance and abrasion resistance. The most promising blend will be produced in a full scale plant trial and will then be further tested. Any field trial of the new slag, ie a trial road surface, must fall outside the project due to the cost and timescale.The second activity of the project is to undertake a detailed assessment of the volumes and values of waste, or difficult-to-reuse, streams of appropriate material from within the glass industry and the steel works to determine the potential for use as a slag modifier.

IE由爆炸炉热金属制成的集成途径的钢渣被拆除，压碎和筛选，并用于为道路的顶部表面创建停机坪。它在英国的出现速度约为500ktpa。但是，它的防滑性不足以使道路表面的最高级别。对于这些地点，必须以其相关的采石场和运输环境影响进口处女份。修改炉渣从钢材料中挖掘出来后增加硅胶含量，应提高其防滑性能对道路表面最高等级所需的水平。炉渣修饰符可能是在过程路线中其他地方出现的炉渣，例如去硫代腔矿石，没有准备就绪。修饰符的其他可能来源是玻璃工业引起的某些流，包括被骨料，混合色和罚款污染的废物流，这些废物流无法返回到该过程，高二氧化硅产生了难治性废物。因此，该项目的目标是使用钢铁行业中产生的矿石，以及玻璃工业的废玻璃和难治之列，所有这些都没有现成的回收路线，以修改钢结构过程中的炉渣。然后，这将产生较高价值的总替换。该项目将通过采用现有的钢矿石并使用许多替代高硅酸盐来源来制造许多新矿渣，以KG量表进行多个新炉渣。热力学建模将用于定义混合物以实现目标矿物学。将测试炉渣以评估防滑性和耐磨性的改善。最有希望的混合物将在全面的工厂试验中生产，然后将进一步测试。由于成本和时间表的成本和时间尺度，新炉灶的任何现场试验都必须超出项目之外。该项目的第二个活动是对废物的数量和废物的数量和价值进行详细评估，或难以重新使用的玻璃工业中的适当材料流，以及钢铁工程以确定用作奴隶式修改器的潜力。