What are the production characteristics of graphite electrodes?(1) Long production cycle. The production cycle of ordinary power graphite electrodes is about 45
What are the production characteristics of graphite electrodes?
(1) Long production cycle. The production cycle of ordinary power graphite electrodes is about 45 days, the production cycle of ultra-high power graphite electrodes is more than 70 days, and the production cycle of graphite electrode joints that require multiple dipping is longer.
(2) Higher energy consumption. The production of 1 ton of ordinary power graphite electrodes requires about 6000kW·h of electric energy, thousands of cubic meters of gas or natural gas, and about 1t of metallurgical coke particles and metallurgical coke powder.
(3) There are many production processes. The production process includes raw material calcination, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. Its production requires a lot of special mechanical equipment and kilns with special structures, and the construction investment is relatively large, and the investment recovery period is long.
(4) A certain amount of dust and harmful gases are generated during the production process, and it is necessary to adopt perfect ventilation and dust reduction and environmental protection measures to eliminate harmful gases.
(5) Petroleum coke and coal tar pitch are the by-products of the production and processing of carbonaceous raw materials required by oil refining companies and coal chemical companies. The quality and stability of the raw materials are difficult to be fully guaranteed, especially for the production of high-power and ultra-high-power graphite electrodes. The use of needle coke, modified electrode pitch, and impregnant pitch for impregnating the insoluble matter content of low polyoxoline is an urgent need for the attention and active cooperation of my country's petroleum and coal chemical processing enterprises.
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Harm of too high temperature: when molten steel out of cooper mold, the billet shell is thin and easy to break out; The accelerated erosion of refractory can ea
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1. The barrier function (mainly completed by the liquid slag layer) isolates the contact between air and molten steel, blocks the secondary oxidation of molten
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In continuous casting, low corrosion resistance often occurs, which directly leads to uneven composition and will eventually affect the smelting quality. In or