在钢铁制造中使用红色泥颗粒的试点应用:过程优化,机制和生命周期评估
1School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China.
ACS omega
|May 5, 2025
概括
红泥 (RM) 渣颗粒,利用生产的废物,已成功开发用于钢铁制造. 这些颗粒具有很高的压力强度和出色的废渣/去除能力,为环境带来好处.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 金工程 金工程 金工程
背景情况:
- 红色泥 (RM) 对行业来说是一个重大的处置挑战.
- 对RM的资源利用对于可持续的工业实践和环境保护至关重要.
研究的目的:
- 开发和评估用于转换器钢铁制造的基于RM的渣颗粒.
- 研究影响颗粒强度的因素,了解其形成机制.
- 评估RM颗粒生产过程对环境的好处.
主要方法:
- 制备颗粒的冷压工艺.
- 系统地研究粘合剂剂量 (粉,碳甲基纤维素 - CMC),含水量,干燥温度,颗粒大小和成形压力.
- 分析晶体结构,功能组,元素价值状态和密度函数理论 (DFT) 计算以确定机制.
- 生命周期评估 (LCA) 用于环境影响评估.
主要成果:
- 在最佳条件下,RM颗粒的压力强度为1162.06N/P (粉粘合剂) 和1345.6N/P (CMC粘合剂),满足了转换器钢制造的要求.
- 机制分析显示,有机结合剂通过化学或结合促进粒子吸附和固化,从而产生更密集的结构.
- 在废渣和去除方面,RM颗粒表现出色.
- LCA确定原材料和运输距离是影响颗粒生产系统环境足迹的关键因素.
结论:
- 基于RM的渣颗粒是转换器钢铁制造的可行和可持续材料.
- 该研究提供了关键的理论指导和RM渣聚合物生产的可持续评估框架.
- 有效利用红泥废弃物可以减轻与行业相关的环境问题.
相关概念视频
01:26Steel Manufacturing
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
01:24Microbes and Other Elemental Cycles
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
01:14Scale-Up Processes
The scale-up of microbial fermentation processes is essential in industrial biotechnology, allowing the transition from laboratory-scale experiments to commercial-scale production while aiming to maintain product yield and quality. This process requires meticulous adjustment of equipment design, process parameters, and contamination control strategies to accommodate increasing culture volumes.At the laboratory scale, cultures are typically maintained in 1 to 10-liter glass or autoclavable...