Chelyabinsk Electrometallurgical Plant OJSC

About the project

In 2008–2009, a dust-removal system was designed for submerged arc furnaces Nos. 45, 46, 47 and 48, type RKO-27.6, in Smelting Shop No. 7 at Chelyabinsk Electrometallurgical Plant (ferrosilicon production); it was built in 2010. A positive Glavgosexpertiza review was obtained in March 2010. The gas-cleaning equipment was supplied as a complete package by W. L. Gore & Associates. Capacity: 291,000 Nm³/h per furnace. Inlet dust concentration: 1.546 g/Nm³; outlet concentration: no more than 0.02 g/Nm³. Inlet gas temperature: 380 °C. Dust particle size distribution: 50 μm — 31%; 17.5 μm — 3%; 12.5 μm — 3%; 8 μm — 2%; 4.25 μm — 4%; 1.875 μm — 4%; 1.125 μm — 3%; 0.815 μm — 5%; 0.315 μm — 45%. Dust composition: CaO — 1.34%; FeO — 26.9%; MgO — 0.7%; Al2O3 — 2.26%; SiO2 — 49.5%; K2O — 0.28%; Na2O — 0.07%; C — 18.8%; S — 0.15%. Gas composition: O2 — 21.5%; CO2 — 0.5%; N2 — 78%.

Gas-cleaning system components:

• gas ducts with an internal diameter of 3 m;
• cyclone battery (first cleaning stage);
• trombone-type coolers for the dust-laden gas mixture;
• bag filter block (second cleaning stage);
• induced-draught fans;
• stack 6.8 m in diameter and 80 m high.