How does the composition of the electrode paste affect the sintering process and electrode quality?
The composition of the electrode paste has a significant impact on the sintering process and electrode quality.The following is the impact analysis of the main components：
1. Solid raw material
The solid raw materials for electrode paste include general calcined anthracite, electric calcined anthracite, petroleum coke, asphalt coke, graphite crushed, roasting crushed, etc.The quality of these raw materials directly affects the conductivity, high temperature resistance and mechanical strength of the electrode.
Conductivity: High-quality solid raw materials can provide better conductivity, reduce resistivity, and reduce the loss of electrical energy when current passes through the electrode.
High temperature resistance: In a high temperature environment, the stability of solid raw materials determines the durability and oxidation resistance of the electrode.
Mechanical strength: The particle size and distribution uniformity of the raw material affect the density and compressive and flexural strength of the electrode.
2. Binder raw material
Binder raw materials such as coal asphalt, anthracene oil, etc., play a role in bonding solid particles together in the electrode paste.
Adhesion: The type and amount of binder directly affect the forming and sintering quality of the electrode.Good adhesion helps to form a dense electrode structure and improves the mechanical strength and electrical conductivity of the electrode.
Volatile components: The binder will evaporate at high temperatures. Excessive volatile components may cause pores and cracks to form inside the electrode, reducing the conductivity and mechanical strength of the electrode.Therefore, the volatile content of the binder needs to be controlled to ensure the quality of the electrode.
3. The influence of composition on the sintering process
Softening point: The softening point of the electrode paste determines the temperature at which it begins to soften during the heating process, which in turn affects the sintering process.A suitable softening point helps the electrode form a uniform sintered layer during the roasting process.
Coefficient of thermal expansion: The coefficient of thermal expansion of the electrode paste should be small to avoid internal stress during temperature changes that cause the electrode to crack.
Ash and sulfur content: Ash and sulfur are harmful impurities in the electrode paste, which can affect the conductivity and oxidation resistance of the electrode.The content of these impurities needs to be strictly controlled to ensure the quality of the electrode.
4. Effect of composition on electrode quality
Conductivity: The conductivity of the electrode directly affects the operating efficiency and energy consumption of the electric furnace.High-quality electrode paste can produce electrodes with good conductivity and reduce power loss.
Durability: The durability of the electrode determines its service life and replacement frequency.High-quality electrode paste can produce electrodes with high mechanical strength and good oxidation resistance, reducing the number of replacements and downtime.
Stability: The stability of the electrode includes its dimensional stability and chemical stability at high temperatures.High-quality electrode paste can ensure that the electrode is not easy to crack, deform or oxidize during use.
The composition of the electrode paste has an important influence on the sintering process and the quality of the electrode.In the production process, it is necessary to strictly control the quality and ratio of raw materials, optimize the selection and use of binders, and ensure the production of high-quality electrode pastes and electrode products.
