The uses of carbon electrodes for furnaces mainly include the following aspects:
Submersible arc furnace smelting: Carbon electrodes are widely used in the process of submersible arc furnace smelting, mainly for smelting industrial silicon, ferroalloys, calcium carbide, yellow phosphorus and other metal or non-metal materials. In the submersible arc furnace, the carbon electrode converts electrical energy into thermal energy by conducting electricity and participates in the smelting process.
Electrochemical industry: Carbon electrodes also have important applications in the electrochemical industry, such as electrodes for electrolysis of aluminum and magnesium, dry cell electrodes, etc. In addition, carbon electrodes are also used in fuel cells and other electrochemical devices.
Special applications: Special carbon electrodes such as porous carbon electrodes and glassy carbon electrodes (made by carbonization of thermosetting resins) have high purity and chemical corrosion resistance and are widely used in the field of analysis.
Classification of carbon electrodes and their application in smelting in submerged arc furnaces
Carbon electrodes can be divided into three types according to their uses and manufacturing processes: carbon electrodes, graphite electrodes and self-baking electrodes:
Carbon electrodes: Made from low-ash anthracite, metallurgical coke, asphalt coke and petroleum coke, widely used in ferroalloy smelting, such as ferrosilicon, silicon-chromium alloy, silicon-manganese alloy, etc.
Graphite electrodes: Made from petroleum coke and asphalt coke, carbon electrodes are then graphitized. Graphite electrodes are divided into three types: ordinary power, high power and ultra-high power. They are mainly used in steelmaking electric arc furnaces, especially high power and ultra-high power electric arc furnaces.
Self-baking electrodes: Made from anthracite, coke, asphalt and tar as raw materials, electrode paste is sintered and coked by electric current and heat transfer in the furnace. Self-baking electrodes have simple processes and low costs and are widely used in ferroalloy production