The cost of charge (scrap, DRI, hot metal) may be the biggest factor in the change of Graphite Electrode steelmaking cost. Therefore, many graphite electrode producers, in addition to obtaining certain product quality, alternately change the charge addition mode for the best production cost. . Danieli developed a feed model for graphite electrode smelting stainless steel, which estimates that raw materials account for more than 80% of production costs. Danieli's lowest cost charge (LCC) model is designed to optimize Ultra High Power Graphite Electrode feed by considering the production methods, influencing factors and constraints required for each furnace, including raw materials, time, and scrap inventory. The model uses each furnace charge as a calculation factor according to the total amount of scrap steel, ferroalloy, residual steel in the furnace and furnace steel (if any), and provides different calculation modes and functions.
EAF process and BOF technology
As soon as the first furnace is filled with molten iron, the top lance immediately begins to blow oxygen to decarburize the molten steel. After the decarburization phase is completed, the oxygen lance is quickly lifted out of the furnace and the electrode is immediately placed. Continuously add DRI cold material while energizing. In the second stage, while the first furnace is being carried out, the second furnace is in the refining stage, so the position of the electrode is adjusted for use in the second furnace, and the first furnace is finished to refine the steel.
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