Electric magnesite furnace
Equipment structure form:
The main technology used in the electric arc furnace is fixed cover, top charging, top exhaust smoke and dust removal, and the structure of the furnace body car. Water shower tube structure, multi-point absorption of no discharge technology, energy-saving short mesh, copper-steel composite conductive cross arm (hydraulic lifting type), large section of water cooling cable, PLC automatic control system. The design of the electric arc furnace is advanced, reasonable, reliable, economical and practical.
Equipment structure characteristics:
1. The furnace cover is fixed, the furnace body running car out of the discharge, the top of the furnace cover is provided with dust removal, feeding device;
2. Each phase adopts two large-section internal water-cooled cables, compensators, water-cooled copper pipes through walls, and energy-saving short nets arranged in triangular space. Short mesh impedance value ≤3mΩ, three-phase impedance unbalance ≤5%;
3.PLC electrode lifting automatic regulator, with automatic and manual operation control mode;
4.. The car moving for the external hoist traction, electrode lifting are hydraulic transmission, integrated block proportional adjustment hydraulic valve;
5. Electrical control using host computer + Siemens PLC control;
6. Transformer: primary side voltage 34.5KV±0.5%,
Secondary voltage :250V-180V-100V.
Constant power, no load electric voltage regulation, top out line mode;
7. Electrode relaxation using hydraulic drive.
Principle of operation:
LM series low pressure pulse dust collector is mainly composed of upper box, middle box, ash hopper, air inlet flow pipe, filter bag assembly and spray device, ash discharge device. The dust-containing air enters from the middle box of the dust collector through the flow equalization duct, under the diversion of the upper flow air duct of the ash hopper, the large particles of dust are separated and fall directly into the ash hopper, while the finer dust evenly enters the middle box and adsorbs on the outer surface of the filter bag, and the clean gas enters the upper box through the filter bag, and is discharged into the atmosphere through the off-line valve through the centrifugal fan and exhaust duct. With the continuous filtration condition, the dust on the filter bag accumulates more and more. When the equipment resistance reaches the limited resistance value (generally 1470Pa), the cleaning control device automatically closes the off-line valve in one chamber according to the setting value of the cleaning time program, and then opens the electromagnetic pulse valve in the chamber according to the setting program to perform wind stop spraying. The pressure in the filter bag is increased by using compressed air to spray instantaneously The dust on the filter bag is shaken off (even if the sticky and fine dust can be cleaned more thoroughly) to the ash hopper and discharged by the exhaust mechanism.
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