Iridium is a rare and precious metal, which has excellent physical and chemical properties such as high melting point, high hardness, high density, and high corrosion resistance, and is widely used in catalysts, electrodes, alloys, medical, aviation and other fields. However, iridium resources are very limited and the cost of mining is high, so iridium from waste materials is an effective way to conserve resources, reduce costs, and protect the environment.
So, how do you ** iridium from waste materials? In general, the process of iridium can be divided into three steps: preliminary treatment, chemical reduction, and separation and purification.
Preliminary treatment refers to the classification and preliminary purification of materials containing iridium oxide to improve treatment efficiency and purity. The materials containing iridium oxide mainly include waste catalysts, waste electrodes, waste alloys, etc., which usually contain other metals or impurities, which need to be separated and enriched by crushing, screening, magnetic separation, flotation and other methods to obtain a concentrate or concentrate containing iridium oxide.
Chemical reduction refers to the reduction of iridium oxide to metal iridium at high temperatures using a suitable chemical reducing agent, such as hydrogen or carbon. This step is the key to iridium, because iridium oxide is a high-melting, poorly soluble oxide, and direct dissolution and separation process becomes very difficult. But with specific chemical methods, we can achieve the effectiveness of iridium oxide**. Commonly used chemical reduction methods include induction melting method, oxidative distillation method, roasting-reduction-oxidation method, etc.
Separation and purification refers to the separation of pure iridium by physical or chemical methods and the improvement of the purity of the iridium through further refining processes. There are many methods of separation and purification, such as chemical precipitation, adsorption, extraction, biological method, etc.
According to the composition and properties of different waste materials, suitable methods and processes can be selected to achieve efficient and efficient utilization of iridium. At present, some progress has been made in the technology of iridium from waste materials, but there are still some challenges and problems, such as high cost, low efficiency, environmental pollution in the process, etc., which require further research and improvement.
Iridium from waste materials can not only save resources and reduce costs, but also protect the environment and achieve sustainable development. As a senior person, I hope to introduce to you the method and significance of iridium through this article, and also hope to arouse everyone's attention and attention to iridium, a rare metal, and jointly promote the development of iridium's development and utilization.