How to improve the high temperature resistance of self-baking electrode paste
Self-baking electrode paste, also known as electrode paste, plays a vital role in the arc smelting process.It not only needs to have good electrical conductivity and oxidation resistance, but also needs to maintain sufficient mechanical strength at high temperatures to ensure that the electrode will not break during the smelting process.In order to improve the high temperature resistance of the self-baking electrode paste, we can start from the following aspects.
1. Optimize the selection of electrode materials
The choice of electrode material is the basis for improving the high temperature resistance.When choosing electrode materials, the arc melting temperature, chemical composition and process requirements should be considered comprehensively.For example, carbon materials are ideal for electrode materials because they can withstand arc temperatures up to 3500℃ and only oxidize slowly.In addition, other high-temperature resistant materials, such as doped modified lithium-chromium-titanium-oxygen anode materials, can be explored. By improving the precursor ratio, precursor treatment process and sintering process, the high-temperature resistance and electrical properties of the material can be effectively improved.
2. Improve the preparation process of electrode paste
The preparation process of electrode paste has an important influence on its high temperature resistance.In the preparation process, the high temperature resistance of the electrode paste can be improved by optimizing the ratio and treatment process of the precursor, as well as improving the sintering process.For example, when preparing doped modified lithium chromium titanium oxygen anode materials, electrode materials with good electrical properties and magnification properties can be obtained by precisely controlling the proportion of reaction raw materials, using absolute ethanol for temperature grinding, and heat treatment at a temperature of 750℃~900℃.
3. Control the sintering process of electrode paste
The sintering process of electrode paste has a decisive influence on its high temperature resistance.During the sintering process, the sintering temperature and time need to be controlled to ensure that the electrode paste can be fully sintered and form a good network-like structure.At the same time, care needs to be taken to avoid the increase in electrode porosity, decrease in bulk density and decrease in electrode strength due to excessive sintering speed.During the sintering process, the sintering characteristics of the electrode paste can be optimized by adjusting the sintering temperature and insulation time, as well as using suitable sintering equipment.
4. Add high temperature resistant additives
In order to improve the high temperature resistance of the electrode paste, you can also consider adding some high temperature resistant additives.These additives can form stable compounds at high temperatures, thereby enhancing the thermal stability and mechanical strength of the electrode paste.For example, you can add some high-temperature-resistant inorganic oxides or carbides, such as alumina, silicon carbide, etc. These additives can react chemically with other components in the electrode paste at high temperatures to form more stable compounds.
5. Optimize the conditions of use of electrode paste
In addition to the above aspects, the high temperature resistance of the electrode paste can also be improved by optimizing the conditions of use.For example, in the arc smelting process, the current size and smelting speed can be reasonably controlled to avoid the electrode overburden due to excessive current or too fast smelting speed.At the same time, it can also ensure that the electrode is in good contact with the bracket to reduce the overheating and damage of the electrode caused by poor contact.
In summary, improving the high temperature resistance of self-baking electrode pastes requires starting from many aspects.By optimizing the selection of electrode materials, improving the preparation process of electrode paste, controlling the sintering process, adding high temperature resistant additives, and optimizing the conditions of use, the high temperature resistance and mechanical strength of the electrode paste can be significantly improved, thereby ensuring its stability and reliability in the arc smelting process.
