Have you ever wondered how ferroalloy and calcium carbide are made? Well, it’s not just magic! One of the key ingredients in the production process is carbon electrode paste. Now, I know what you’re thinking, “Electrode paste? That sounds like a science experiment gone wrong.” But fear not, electrode paste is actually a critical component that helps transfer electrical current to molten metal. So, let’s dive into the fascinating world of carbon electrode paste and discover how electrode paste plays a key role in the production of various ferroalloy.
The self-baking process of electrode paste in submerged arc furnace can be divided into three stages:
① Softening Stage
During this stage the temperature rises from 25°C to 120-200°C, approximately 500mm above the conductive jaw. At this time, the solid electrode paste melts, the resistance increases, the strength decreases, and finally the electrode paste becomes a liquid state.
② Volatility stage
The temperature rises from 120-200°C to 650-750°C, roughly at the half-ring. At this time, the electrode paste is fully melted, flows along the cross-section of the shell, fills the gaps, and makes the quality uniform. At the same time, it begins to volatilize obviously and gradually become viscous.
③ Sintering stage
The temperature at this stage rises from 650-750°C to 900-1000°C. At this time, a small amount of volatile matter continues to volatilize, and further sintering begins, the conductivity is greatly increased, and it becomes a hard whole. Complete sintering height is 200-400mm below the conductive jaw plate!
In summary, understanding the principle of electrode paste consumption is crucial for optimizing industrial processes. By analyzing factors like operating conditions and material properties, we can reduce waste and improve cost-effectiveness. Continued research and innovation are necessary for progress in these important industries.
