UHP graphite electrode is mainly used for ultra high power electric arc furnaces in steel smelting industry. Its main ingredient is high-value needle coke which is made from either petroleum or coal tar. By working together with our partners, we can provide the complete solution for UHP graphite electrode project include raw coke handling and storage, dosing, mixing, kneading, green electrode pressing, baking & rebaking, impregnatio, graphitization and product finishing and packing.
The main process flow of UHP Graphite Electrode is as follows. If you want to know more process details, please click the button below to get complete information.
The raw coke with different size will be stocked in different silo and they will be sent to the mixing and kneading system via the dosing system base on the suitable proportion. The mixed coke and will be preheated and mixed with the pitch in the preheater tank and then sent to the keanding tank. The paste material will be sent to the cooler tank after keanding sufficiently.
We recommend to use the vertical stamping horizontal press machine to undertake the green electrode forming work. Each press machine has two separate chambers. The vertical chamber for stamping is designed to ensure the materials are distributed very evenly. After stamping enough, the materials will be sent to the horizontal chamber for extruding.
Prominer has the ability to provide wide range of technological solutions for primary & secondary baking. Since baking and rebaking has different temperature and fire cycle as for electrodes as for pins , its possible to adopt alternative furnace and kiln types based on customer requirements. Pit-ring Furnace and car bottom furnace (CBF) can handle bakeing and rebaking work. Tunnel furnace is suitable to do rebaking work. Due to the higher cost of natural gas in China, most of the electrode manufacturer choose pit-ring furnace for primary baking and tunnel furnace for seond baking.
High-pressure impregnation of once-baked graphite electrode products to reduce the porosity and increase the bulk density. The hot-in and cold-out type impregnation system is the most popular design in China. The whole system inlcude preheating furnaces, imparegnation tanks, transportation flat cars. The primary baked graphite electrode products are hoisted into the electrode frame on the electric flat car on the horizontal conveying car by the crane, and then sent into the preheating furnace by the electric flat car for preheating. And then the preheated electrode will be transported out of the preheating furnace and sent to the high-pressure impregnation tank for high-pressure impregnation.
Graphitization is the process of heating amorphous carbon for a prolonged period of time, rearranging the atomic structure to achieve an ordered crystalline structure that is typical of solids. During graphitization, carbon atoms are rearranged to fill atom vacancies and improve atom layout. The lengwise graphitization (LWG) furnace is the priority choice for undertaking the graphitization work for UHP electrode. For hanlding the pin or special graphite, the Acheson (AC) furnace should be considered.
For making the final electrode and nipple, we recommend to use automated finishing machining lines and the complete lne inlcude cutting, surfance polishing, tread milling. It is equipped with the online inspection system as well.
Some of the machines and equipment used in this solution. If you want to know more about the equipment, prices and solution details, you can click the button below to contact us. We provide instant online service!
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