Abstract
In the course of the research, the calculation and performed analysis of the arc efficiency of furnaces ASF-5 and ASF-100 power furnaces were performed and the average arc efficiency for melting was determined. The reasons of the increased specific consumption of electric power on charge melting by arc steel-melting furnaces of small capacity in comparison with heavy-load furnaces are revealed. Efficiency of arcs of low-tonnage furnaces is much less than the same indicator of modern heavy-duty arc steel-melting furnaces (ASF). Low efficiency of arcs of light-duty furnaces leads to a significant specific power consumption for smelting, comprising 700-750 kWh/t, that is 1.9-2 times higher than the specific energy consumption in modern furnaces ASF-120, amounting to 375 kWh/t. With the use of devices for foaming slag in furnaces ASF-5 the average melting efficiency of furnaces can be increased, and the specific electricity consumption for melting will be reduced to 440-480 kWh/t.
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