Application of high-strength electrode paste on self-baking electrodes in large mine heating furnaces
With the continuous development of mine heating furnace technology, large-scale and airtight has become the main trend of mine heating furnace technology.This development trend puts forward higher requirements for the quality of the electrode paste, especially the sintering properties and electrical conductivity of the electrode.As an advanced electrode material, high-strength electrode paste has been widely used in self-baking electrodes in large mine heating furnaces and has achieved remarkable results.This article will discuss in detail the characteristics, production technology and application effect of high-strength electrode paste on self-baking electrodes in large-scale mine heating furnaces.
Characteristics of high-strength electrode paste
High-strength electrode paste, also known as self-baking electrode, is an electrode material made of anthracite, coke, asphalt and tar as the main raw materials at a certain temperature.It has the following significant characteristics：
Excellent sintering performance: The high-strength electrode paste can be quickly sintered and formed during the roasting process to form a solid electrode structure, thereby improving the mechanical strength and electrical conductivity of the electrode.
Low ash content and low resistivity: By optimizing the ratio of raw materials and production technology, the high-strength electrode paste reduces the ash content, improves the electrical conductivity of the electrode, and reduces the loss of electrical energy.
High temperature resistance and small coefficient of thermal expansion: In a high temperature environment, the high-strength electrode paste can maintain a stable form and is not prone to thermal expansion, thereby extending the service life of the electrode.
High mechanical strength: The high-strength electrode paste has extremely high mechanical strength after sintering, can withstand large mechanical and electrical loads, and reduces the risk of electrode breaking.
Production process of high-strength electrode paste
The production process of high-strength electrode paste mainly includes several steps such as calcination, crushing, screening, grinding, kneading and forming of raw materials.Among them, the choice and ratio of raw materials are essential.At present, the raw materials for the production of high-strength electrode pastes are mostly high-quality raw materials such as electro-calcined anthracite, calcined petroleum coke, and modified coal asphalt.These raw materials have lower ash content and higher specific resistance, which is conducive to improving the electrical conductivity and sintering properties of the electrode.
In the kneading process, the kneading temperature and stirring time need to be strictly controlled to ensure the uniformity and plasticity of the electrode paste.At the same time, in order to improve the sintering speed of the electrode paste, a small amount of graphitized metallurgical coke, graphite crushed or natural graphite and other materials with good thermal conductivity can also be added to the ingredients.
Application of self-baking electrodes in large mine heating furnaces
The application effect of high-strength electrode paste on self-baking electrodes in large mine heating furnaces is remarkable.Due to the gradual development of large-scale ore heating furnaces in the direction of large-scale and airtight, the heat obtained by the electrodes during the roasting process is greatly reduced, which requires the electrode paste to have higher sintering properties and electrical conductivity.High-strength electrode paste meets this demand.
In practical applications, the high-strength electrode paste is loaded into the electrode shell that has been installed on the electric furnace. With the operation of the electric furnace, the electrode paste is gradually softened, melted and sintered at high temperature.Because the high-strength electrode paste has excellent sintering properties and mechanical strength, the electrode is not easy to break and fall off during use, thereby improving the stability and service life of the electrode.
In addition, the application of high-strength electrode paste has significantly reduced the consumption rate of electrodes, reduced the frequency of electrode replacement, and reduced production costs.At the same time, due to the improvement of the stability and electrical conductivity of the electrodes, the smelting efficiency of the electric furnace has also been significantly improved.
conclusion
The application of high-strength electrode paste on the self-baking electrodes of large-scale mine heating furnaces is one of the important directions of the technological development of mine heating furnaces.By optimizing the ratio of raw materials and production technology, high-strength electrode pastes with excellent sintering properties, low ash content, low resistivity and high mechanical strength can be produced.The application effect of this electrode paste in large-scale mine heating furnaces is remarkable, not only improving the stability and service life of the electrode, but also reducing production costs and improving smelting efficiency.Therefore, high-strength electrode paste has broad application prospects and market potential in the field of mine heating furnaces.
