Submerged arc furnace (also known as electric arc furnace or resistance electric furnace) is the core equipment used for reducing and smelting ores in the metallurgical industry. It is mainly used to produce ferrosilicon, ferromanganese silicon, industrial silicon, ferrochrome, ferronickel, silicon-barium-calcium, titanium slag and other ferroalloys as well as chemical raw materials such as calcium carbide.
When smelting industrial silicon or ferrosilicon, silicon furnaces produce a large amount of high-temperature dust (temperatures can reach 300-500°C), the main components of which are SiO₂ and metal oxides. The dust removal system must be able to withstand high temperatures and have high-efficiency filtration capabilities, and is usually composed of the following components:
Air cooler: reduces the temperature of flue gas to below 200℃ through natural cooling.
Cyclone Separator: Serves as primary dust removal equipment, utilizing centrifugal force to separate large dust particles (>10μm), achieving an efficiency of approximately 70-80%. Its inlet air velocity should be controlled at 15-20m/s (refer to the Industrial Ventilation Design Manual). Excessively high air velocity can lead to secondary dust collection.
Bag Dust Collector: Utilizes high-temperature-resistant filter media (such as PTFE-coated filter bags) to filter fine particles (<2.5μm). The filter bag life is typically 2-3 years, with a dust removal efficiency of ≥99.5%. Key parameters include filtration air velocity (0.8-1.2m/min) and differential pressure (<1500Pa).
1. Dust Collection Stage: After exiting the silicon furnace, the high-temperature flue gas is first cooled to below 200°C by a cooling device (such as air cooling or spray cooling) to prevent damage to the filter bags.
2. Multi-stage Separation Process:
Primary Separation: A cyclone separator removes large particles, reducing subsequent load.
Secondary Separation: A bag filter captures remaining dust, typically using pulsed jet cleaning (pressure 0.4-0.6 MPa, intervals 30-60 seconds).
3. Emission Control: The purified gas is discharged through a chimney, with a particulate matter concentration of ≤10 mg/m³ (in compliance with GB 28665-2012).
Contact With Us:
E-mail: tshb@environtechts.com
Have a Questions? Call Us:
Add:
Hanshan Industrial Park, Lintou Town, Hanshan County, Ma'anshan City, Anhui Province, China.
Please contact Tianshun for your air pollution control equipment solutions!
English
