Mineral Furnace

Mineral furnace is also called arc furnace or resistance furnace. It is mainly used for reducing smelting ore, carbon reducing agent and solvent and other Raw materials. The main production of ferrosilicon, ferromanganese, ferrochrome, iron tungsten, silicon manganese alloy and other ferroalloys, is an important industrial Raw materials in the metallurgical industry and calcium carbide and other chemical Raw materials.

Working Characteristic

Its working characteristic is using carbon or magnesium refractory material as furnace lining, using self-cultivating electrode. Electrode inserted into the charge for buried arc operation, the use of arc energy and current through the charge, because of the resistance of charge and energy to smelt metal, feeding, intermittent slag, continuous operation of an industrial electric furnace. The load of the mine furnace transformer is continuous and stable, the impedance is low, the voltage regulation series is large, the level difference is small and the overload capacity is strong. Can be divided into load, no excitation voltage regulation two. In general, the first several constant capacity output, the last several constant current output.

Mineral heat furnace is a kind of industrial electric furnace with huge power consumption. It is mainly composed of furnace shell, furnace cover, furnace lining, short net, water cooling system, smoke exhaust system, dust removal system, electrode shell, electrode pressure release and lifting system, loading and unloading system, controller, burner, hydraulic system, transformer and various electrical equipment and so on.

According to the structure characteristics and working features of -arc furnace, mineral hot furnace system reactance of 70% is produced by short_net system, while short_net system is a large current, maximum current can reach tens of thousands of amp, so short_net properties determine the performance of ore heat furnace, it is for this reason, therefore -arc furnace natural power factor is difficult to achieve 0.85 above, The vast majority of natural power factor of the furnace is between 0.7 ~ 0.8, the lower the power factor of not only lowered the efficiency of transformer, a lot of useless, and is extra fine of electricity, power sector at the same time, because the electrode manual control and stacking process, lead to three phase power imbalance increase, the highest imbalance degree can reach more than 20%, This leads to low smelting efficiency and higher electricity cost. Therefore, improving the power factor of short network and reducing the imbalance of power network have become effective means to reduce energy consumption and improve smelting efficiency. If appropriate measures are taken to improve the short network power factor, the following effects can be achieved:

(1) Reduce power consumption by 5-20%;

(2) Increase the yield by more than 5%~10%