Multi-loop direct-current power supply smelting ore furnace

Abstract

The invention relates to a submerged arc furnace with a multi-loop direct current power supply, wherein, an alternating current power supply becomes a plurality of direct current power supplies after transforming of a transformer and commutating of a rectifier, the direct current power supplies are connected with one end of a corresponding positive negative carbon electrode bar through a short network, the other end of the positive negative carbon electrode bar inserts into the charging in the hearth, the positive negative electrode instantly produces the arc to melt the charging to obtain ferrous alloy products. The submerged arc furnace has the advantages of steady smelting arc, big melting pot, exact electrode control and remarkable energy saving effect, and is applicable to industrialization; the reactance of the short network is zero and the device does not have the eddy current loss.

Description

technical field [0001] The invention relates to ferroalloy submerged arc furnace equipment, in particular to double-circuit, three-circuit and other multi-circuit DC power submerged arc furnaces. Background technique [0002] At present, almost all submerged arc furnaces used in my country's ferroalloy industry use three-phase AC power supply for smelting, and some use single-circuit DC power supply for smelting. These AC power furnaces have low power factor, large short-circuit reactance, and severe skin effect in transmission devices such as short-circuit and electrodes, which cannot effectively use the transmission equipment, and the AC arc during smelting is unstable, and the eddy current loss caused by the AC power supply is very large. , the product has high power consumption, serious equipment damage, and high failure rate, which seriously affects the normal use of the electric furnace in the production of ferroalloys and energy saving and consumption reduction; the e...

AI Technical Summary

Problems solved by technology

These AC power furnaces have low power factor, large short-circuit reactance, and severe skin effect of short-circuit and electrode transmission devices, which cannot effectively utilize power transmission equipment, and the AC arc during smelting is unstable, and the eddy current loss caused by the AC power supply is very large. , the product has high power consumption, serious equipment damage, and high failure rate, which seriously affects the normal use of the electric furnace in the process of producing ferroalloys and energy saving and consumption reduction; the electric furnace using a single-circuit DC power supply can only be used in the laboratory because of its small heat radiation energy. It is not possible to make it industrially used for experimentation or small-scale production of special products

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