Power saving method for submerged arc furnace

Abstract

The invention relates to a power saving method for a submerged arc furnace. The power saving method comprises the steps of a, eliminating capacitance compensation, changing the diameter of an electrode and changing the current intensity in a unit area, wherein the diameter of the electrode of a traditional 25500 kV calcium carbide furnace is decreased to 1.14 m from 1.25 m, and the current passing through the electrode is decreased to 72000 A from 86000 A; b, increasing the ratio of the voltage to the current, keeping the ratio of the current to the voltage being 1: 310, reducing generation of the impedance and the inductive reactance of the submerged arc furnace, and increasing the natural power to 0.9 so as to increase the utilization ratio of work of the current; c, improving the transmission capacity of a short net in a short net part, wherein the operating voltage is increased, the current is decreased, the arcing length and the arcing intensity of an electrode arc are increased, and the efficiency of converting electric power into heat energy is improved. By means of the method, temperature can be effectively centralized, the energy consumption of production can be lowered, the power factor can be increased, and the yield and quality of products can be improved.

Description

technical field [0001] The invention relates to a power-saving method for a submerged arc furnace. Background technique [0002] Submerged arc furnace is also called electric arc furnace or resistance electric furnace. It is mainly used for reducing smelting ores, carbonaceous reducing agents and solvents and other raw materials. It mainly produces ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloy, etc. It is the production equipment for important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. Its working feature is to use carbon or magnesia refractory materials as the furnace lining and use self-cultivating electrodes. The electrode is inserted into the furnace material for submerged arc operation, using the energy and current of the arc to pass through the furnace material, and the energy generated by the resistance of the furnace material to smelt metal, feedi...

AI Technical Summary

Problems solved by technology

However, due to the high cost and the harsh working environment, the service life is greatly affected

The reactive power compensation at the low-voltage side of the short-network also brings about an increase in harmonics, so measures must be taken to suppress the 3rd to 7th harmonics, thereby increasing the investment and prolonging the investment recovery period. At the same time, the follow-up maintenance costs are high and the comprehensive benefits are not good.