Ultra High Power (UHP) Graphite Electrodes

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Ultra High Power (UHP) Graphite Electrodes

Q:The reason why graphite is used as electrode: Graphite has good thermal stabilityThe softening point of copper in 1000 degrees, easily deformed by heat, the melting point of graphite is 3850 + 50 DEG C, the boiling point of 4250 DEG C, even after the ultra high temperature arc ignition, the weight loss is very small, the thermal expansion coefficient is small. The strength of graphite increases with the increase of temperature, and the strength of graphite is doubled at 2000 degrees centigrade. In comparison, the thermal expansion coefficient of graphite material is only 1/30 of copper material.

Q:What is the role of the Pt electrode? What is the difference between the graphite electrode and the graphite electrode?: This kind of stable material because of the chemical properties is stable, is often used as a counter electrode. The electrode is composed of circuit and the working electrode by current.Pt electrode, carbon electrode are inert electrode, relatively stable, can be used as the electrode.

Q:Why should graphite paper be placed between the heater and the graphite electrode?: Determine the thickness of the graphite bowl, the thickness of the graphite bowl is generally 3 mm -6 mm, three, determine the diameter of the heater, according to the diameter of the crucible and the thickness of the graphite bowl, calculate the inner diameter of the heater. The gap in the quartz crucible diameter phi = +2 times is +2 times the wall thickness of stone bowl bowl and graphite heater if the graphite bowl wall thickness is a, graphite bowl gap and heater for B (b=5 mm), phi = Phi Phi +2a+2b= within the outer crucible outer crucible +2 (a+b) four, to determine the effective heater the height after practice, the effective length of the quartz crucible heater is high 1.6 to 1.8 times.

Q:The production of one ton of steel required graphite electrode: The consumption of graphite electrode in steelmaking in arc furnace, according to the different material, different specifications of graphite electrode used (normal power graphite electrode, high power graphite electrode, ultra high power graphite electrode) have relations.

Q:What are the losses in graphite electrode?: So tell, this problem is to answer a lot, graphite under high temperature oxidation, generally around 400 degrees, began a slight oxidation, but the human eye is to be observed, with the increase of temperature, the graphite oxide will increase, this time should be used to protect gas or vacuum to protect what you said is, nitrogen protection, and general protection of nitrogen can reach more than 2000 degrees, if the high temperature to 3800 degrees, will you say that vapor formed in graphite surface. To achieve this temperature, it is necessary to add inert gas to achieve, otherwise, can not reach, generally to 4350 degrees, the graphite began to soften.

Q:What is the composition of petroleum coke and what is its use?: Medium sulphur and common cooked coke; used in large quantities for aluminium smelting. High sulfur, ordinary coke is used in chemical production, such as the manufacture of calcium carbide, silicon carbide, etc., but also as a metal casting and other fuels. Most of the petroleum coke produced in China belongs to low sulfur coke, which is mainly used for smelting aluminium and making graphite.

Q:The future of graphene: Energy storage and new display areas. Graphene has excellent conductivity and transparency. As a transparent conductive electrode material, graphene has a good application in touch screen, liquid crystal display, energy storage batteries and so on. Graphene is considered to be the most potential alternative to indium tin oxide manufacturing in touch screen manufacturing, and Samsung, SONY, Hui Rui, 3M, Dongli, Toshiba and other leading enterprises have made key research and development layout in this field. Researchers at the University of Dezhou, Austen, used KOH to chemically modify graphene to form a porous structure, resulting in a storage density of ultracapacitor near the lead acid battery. Michigan Technological University scientists have developed a unique honeycomb structure of three-dimensional graphene electrode, photoelectric conversion efficiency of 7.8%, and low price, is expected to replace platinum in solar cells applications. Toshiba Co developed graphene and silver nanowires composite transparent electrode, and achieved a large area.

Q:Graphite electrode press device: High power graphite electrodes. Graphite electrodes with a current density of 18 ~ 25A / cm 2 are allowed. They are mainly used in high power arc furnaces for steelmaking

Q:Can Naiduo high temperature graphite: Graphite gasket medium: hot water, steam, oil, acid, alkali, ammonia, hydrogen, organic solvents, hydrocarbons, cryogenic liquids, etc..Maximum use pressure of graphite gasket: 30MPa.Service temperature of graphite gasket: -200~650

Q:How can hydrogen be produced by electrolysis of sodium hydroxide with graphite as an electrode?: Molten sodium hydroxide is ionized out of Na+ and OH-, electrons are lost at the anode OH-, oxygen and water are produced (immediately evaporated at high temperature), and electrons are generated at Na+ at the cathode Na

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