ZHENGSHAN TECHNOLOGY

As a key conductive material in electrolysis and high-temperature smelting processes, the performance and quality of electrode paste directly affect production efficiency and safety. In high-temperature environments, electrode paste needs to maintain stable conductivity, structural integrity, and chemical stability to ensure the continuity and efficiency of the smelting process. This article will conduct in-depth research on the stability of electrode paste under high temperature conditions, explore the key factors affecting its stability, and propose improvement measures.
Basic composition and characteristics of electrode paste
Electrode paste is mainly made by mixing raw materials such as petroleum coke, asphalt coke, and coal tar pitch, and is sintered at high temperatures to form electrodes with good conductivity. Electrode paste can withstand high temperatures, has a low coefficient of thermal expansion, a low resistance coefficient, and high mechanical strength, which make it play an important role in high-temperature smelting processes.
The function of asphalt
In the preparation of electrode paste, asphalt, especially national standard medium temperature coal tar pitch, is widely used due to its excellent conductivity, thermal stability, and chemical stability. Medium temperature coal tar pitch has a moderate softening point, which can maintain structural stability at high temperatures and is not easily decomposed or deteriorated. Its good conductivity helps to reduce resistivity and improve current transmission efficiency; High thermal stability can resist softening, deformation, or melting in high-temperature environments, maintaining the shape and structural integrity of the electrode paste; Chemical stability can effectively resist the corrosion and erosion of electrolytes, extending the service life of electrode paste.
Factors affecting the stability of electrode paste under high temperature conditions
thermal stability
Under high temperature conditions, the thermal stability of electrode paste is an important indicator for evaluating its performance. Modified coal tar pitch has undergone special processing, which significantly improves its thermal stability and can maintain the stability of its structure and the durability of its performance at high temperatures. This helps prevent electrode paste from softening, deforming, or melting at high temperatures, ensuring the continuity and stability of the smelting process.
Volatile content
The volatile content in electrode paste also has a significant impact on its stability. Volatile matter mainly includes water and light organic compounds, which gradually evaporate at high temperatures. Excessive volatile matter can lead to the formation of more pores in the electrode paste during sintering, reducing the density and strength of the electrode. Therefore, controlling the volatile content in the electrode paste is crucial for improving its stability at high temperatures.
mechanical strength
The mechanical strength of electrode paste is also an important factor affecting its high-temperature stability. Under high temperature and mechanical stress conditions, electrode paste needs to maintain sufficient compressive and flexural strength to avoid cracking or deformation. Higher mechanical strength can extend the service life of electrodes and improve the stability of the smelting process.
chemical stability
During the electrolysis process, the electrolyte may contain some corrosive substances, which require high corrosion resistance of the electrode paste. The chemical stability of medium temperature coal tar pitch in the national standard is good, which can effectively resist the corrosive effect of electrolyte and maintain the chemical stability of electrode paste in high temperature environment.
Measures to improve the high-temperature stability of electrode paste
Optimize raw material ratio
By optimizing the ratio of raw materials such as petroleum coke, asphalt coke, and coal tar pitch, the overall performance of electrode paste can be improved. For example, increasing the proportion of modified coal tar pitch can improve the thermal and chemical stability of electrode paste; Reasonable control of volatile matter content can reduce the formation of pores during sintering process.
Improve the preparation process
Improving the preparation process of electrode paste, such as using advanced mixing equipment and sintering technology, can enhance the uniformity and density of the electrode paste. At the same time, controlling the sintering temperature and time ensures that the electrode paste can form a strong carbon structure at high temperatures, improving its mechanical strength and thermal stability.
Strengthen quality inspection
Conducting a series of quality tests on electrode paste, such as particle size distribution, volatile matter content, adhesion, electrical resistivity, ash content, mechanical strength, thermal expansion coefficient, and chemical composition, can comprehensively evaluate its performance and quality. By strengthening quality inspection, timely detection and resolution of problems, the stability and reliability of electrode paste under high temperature conditions are ensured.
conclusion
The stability of electrode paste under high temperature conditions is the key to the continuity and efficiency of the smelting process. By optimizing raw material ratios, improving preparation processes, and strengthening quality inspections, the thermal stability, chemical stability, and mechanical strength of electrode paste can be effectively improved, thereby meeting the high requirements for electrode paste performance in high-temperature smelting processes. In the future, with the continuous development and improvement of electrolysis technology, the requirements for electrode paste performance will also continue to increase. Therefore, it is necessary to continuously study the preparation technology and application performance of electrode paste, and promote its development towards higher quality, higher efficiency, and more environmentally friendly direction.