Inspection of Coke Oven Batteries at EVRAZ Zapsib Steel Mills
1 November 2018 0:00
August to October 2018, OKOS LLC experts being subcontractor of VUHIN JSC carried out an inspection of the ZapSib COBs health. The batteries inspected were No.1 to 4, and 7 at the Coke Plant, which is part of the Zapsib Steel Mills combined ‘Sinter – Coke - Blast Furnace’ Facilities. The job was accompanied with a snapshot recording.
The inspection work covered the following items and facilities:
- coking chambers, oven door lining, carbon deposits;
- heating system, through the inspection holes of vertical flues;
- sole ducts and regenerators’ checker bricks;
- condition of the bracing system (flashplates, door frames, buckstays, tie-rods, spring units);
- condition of the gas collectors and gas off-take fittings;
- condition of the coke machines and the auxiliary mechanisms;
- repairs in progress of the coking chambers’ refractory brickwork.
The Customer was presented a detailed report on the COBs technical condition. The report also contained:
- forecast for duration of the batteries’ operational life based on the current scope of the maintenance /repairing activities;
- recommendations for extending the batteries’ operational life c/w a list of the types and scope of maintenance/repair activities required and a resulting forecast for COBs operational life duration;
- recommendations for prospective contractors for such repairs.