Transient phenomena in slag reactions and corrosion

渣反应和腐蚀中的瞬态现象

• 批准号: 194165-2010
• 负责人: Coley, Kenneth
• 金额: $ 2.19万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523129
• 关键词: Transient; phenomena; slag; reactions; corrosion

The metals industry is a major component of the Canadian economy and to develop better control of the chemical processes used in extracting and refining metal will be to the overall benefit of our economy. Even after many years of running certain processes, it is difficult to predict the behaviour of important chemical reactions and to do this in a way that is sufficiently quantitative to ensure optimum performance. Largely this is because important conditions change during the reaction. For example, in the case of refining a liquid metal using a liquid slag, the two liquids may mix in an unpredictable and uncontrolled way for an unknown time. There are several reasons why this might happen and the current work addresses two of them. This should lead to better control of steelmaking and refining processes. Another source of transient behaviour is competing reactions. In refining we may have a desirable reaction and several others that may help or hinder this reaction. These reactions compete with each other and we would want the helpful reactions to win the competition. The current work seeks to find circumstances that enhance the beneficial reactions over those that are detrimental, but to do this we must first understand the nature of the competition. This is also important in metal refining. Transient reactions are not only an issue in metals production but are also found in corrosion. Sulphuric acid is a major industrial chemical of importance to Canada. The stainless steels used to store and transport sulphuric acid corrode in a way that makes the lifetime of the container very difficult to predict. The corrosion switches itself on and off periodically and to predict the corrosion rate we need to know for what fraction of time the corrosion is switched on. Our group has made excellent progress in understanding this and over the course of this project will develop a method to precisely predict corrosion performance in these oscillating systems.

金属工业是加拿大经济的主要组成部分，更好地控制用于提取和精炼金属的化学过程将有利于我们的经济。即使在运行了许多年的某些过程之后，也很难预测重要化学反应的行为，也很难以一种足够定量的方式来确保最佳性能。这在很大程度上是因为重要的条件在反应过程中发生了变化。例如，在使用液态渣精炼液态金属的情况下，这两种液体可能在未知的时间内以不可预测和不受控制的方式混合。有几个原因可能会发生，目前的工作解决了其中的两个原因。这应该会导致对炼钢和精炼过程的更好控制。瞬变行为的另一个来源是竞争性反应。在提炼过程中，我们可能会有一个令人满意的反应，还有其他几个可能有助于或阻碍这个反应的反应。这些反应相互竞争，我们希望得到有益的反应来赢得竞争。目前的工作试图找到能够增强对不利因素的有益反应的环境，但要做到这一点，我们必须首先了解竞争的性质。这在金属精炼中也很重要。瞬变反应不仅是金属生产中的一个问题，而且在腐蚀中也存在。硫酸是一种对加拿大很重要的主要工业化学品。用于储存和运输硫酸的不锈钢会发生腐蚀，这使得容器的寿命很难预测。腐蚀会周期性地自动开启和关闭，为了预测腐蚀率，我们需要知道腐蚀开启的时间比例。我们的团队在理解这一点上取得了很好的进展，在这个项目的过程中，我们将开发一种方法来准确预测这些振荡系统中的腐蚀性能。