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The crucible can be divided into three categories: graphite crucible, clay crucible and metal crucible. In graphite crucible, there are three kinds of graphite crucible and special graphite crucible and high pure graphite crucible. Various types of graphite crucible, due to different properties, uses and conditions of use, the use of raw materials, production methods, process technology and product model specifications are also different. The main raw material of the graphite crucible is the crystalline form of natural graphite. So it keeps all kinds of physical and chemical characteristics of natural right ink. That is: with good thermal conductivity and high temperature resistance, in the use of high temperature, the thermal expansion coefficient is small, the heat and cold has…
Graphite electrode material selection is based on a lot, but there are four main criteria: 1.Average particle diameter of materials The average particle diameter of the material directly affects the state of the discharge of the material. The average particle size of the material is smaller, the discharge of the material is more uniform, the discharge condition is more stable, the surface quality is better. For surface, high precision forging, die-casting molds, are usually recommended, the coarse grain materials, such as ISEM-3 etc.; for higher electron mold surface, precision requirements, recommend using average particle diameter in 4 m below the material, to ensure that by mold machining accuracy and surface finish. The average particle size of the material is smaller,…
1, by the wet graphite electrode, to be dry before use. 2, remove the foam plastic protective cap on the hole of the spare graphite electrode, and check whether the thread in the electrode hole is complete. 3, with oil and water of compressed air to clean up the spare graphite electrode surface and the hole of the screw thread; avoid cleaned with a group or a wire brush wire cloth. 4, the joint carefully screwed standby graphite electrode end (not recommended the connector directly into the furnace to replace the down electrode) electrode hole, not collide with thread. 5, the electrode sling (recommended spreader of graphite material) electrode hole screwed into the other end of the inner electrode standby.…
