Application of high-strength electrode paste in large mine heat furnaces
As an important equipment in the metallurgical industry, ore heating furnaces are mainly used to reduce raw materials such as smelting ores, carbonaceous reducing agents and solvents, and to produce ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferromanganese, silicon-manganese alloys, and chemical raw materials such as calcium carbide.Its working principle is to generate energy through the energy of the arc and the current through the resistance of the charge to melt the metal.As a key component in the ore heating furnace, the electrode's performance directly affects the smelting efficiency and economic indicators.Therefore, the use of high-strength electrode paste in large-scale ore heating furnaces has become an important means to improve smelting efficiency and product quality.
The composition and function of electrode paste
Electrode paste, also known as self-baking electrode, is mainly composed of electrode cylinder and its internal electrode paste.The electrode cylinder is made of steel rolled and welded, with fins and iron bars inside, which play a role in transmitting current and increasing the strength of the electrode.The electrode paste is made from a mixture of raw materials such as general calcined anthracite coal, metallurgical coke powder and medium-temperature coal asphalt, and it is calcined into electrodes by itself during the smelting process of the mine thermal furnace.The electrode paste is completely carbonized at a high temperature above 1000℃ to form a carbon electrode, which conducts electricity and converts energy in the bath of the mine thermal power furnace.
Advantages of high-strength electrode paste
With the continuous development of mine heating furnace technology, the trend of large-scale and airtight is becoming more and more obvious.Due to the reduction of conductive and radiant heat in the traditional electrode paste, the heat obtained by the electrode from the furnace is greatly reduced, which requires improving the sintering performance of the electrode paste to make up for this deficiency.High-strength electrode paste came into being precisely for this demand, and it has the following significant advantages：
High mechanical strength: The high-strength electrode paste has high mechanical strength, can withstand large mechanical and electrical loads, avoid electrode breakage, and improve the continuity and stability of smelting.
Good electrical conductivity: The high-strength electrode paste has a small resistivity, which can reduce the loss of electrical energy and improve the smelting efficiency.
High temperature resistance and oxidation resistance: The high-strength electrode paste can withstand high temperatures, has a small coefficient of thermal expansion, strong oxidation resistance, and can work stably for a long time in a high temperature environment.
Good sintering performance: The sintering temperature range of the high-strength electrode paste is wide, and the sintered electrode has higher strength and stability.
Application examples and effects
In the test of the use of high-strength electrode paste in the 20MVA mine heat furnace, the results showed that the high-strength electrode paste can effectively prevent electrode accidents and play a key role in improving the economic indicators of smelting.Through measures such as optimizing the electrode voltage discharge, reducing the conductive area of the electrode shell, and appropriately increasing the secondary voltage, the use effect of high-strength electrode paste has been further improved.
In addition, the use of high-strength electrode paste also reduces the consumption rate of electrode paste, extends the service life of the electrode, and reduces production costs.At the same time, due to the excellent sintering performance of the high-strength electrode paste, the stability of the electrode in the smelting process has been significantly improved, and the smelting efficiency and product quality have been effectively improved.
Innovation of raw materials and technology
In order to further improve the quality of high-strength electrode pastes, innovation in raw materials and technology is also essential.For example, the use of high-quality raw materials such as electro-calcined anthracite coal, calcined petroleum coke and modified coal asphalt can significantly improve the specific resistance, compressive strength, flexural strength and tensile strength of the electrode paste.At the same time, the use of advanced paste forming machines can increase the plasticity of the electrode paste, solve the problem of holes that are easy to form when large pieces of paste are melted in the furnace during use, and improve the use effect of the electrode paste.
The application of high-strength electrode paste in large-scale mine heating furnaces has significant advantages and effects.Through measures such as optimizing the electrode voltage discharge volume and increasing the secondary voltage, as well as the innovation of raw materials and technology, the use effect of high-strength electrode paste can be further improved, smelting efficiency and product quality can be improved, and production costs can be reduced.Therefore, the application of high-strength electrode paste in large-scale mine heating furnaces has broad prospects and deserves further promotion and application.
