Improved EAF availability and refractory maintenance with shell change practice
Even with in-campaign gunning repairs, EAFs need refractory relines every one to four weeks depending on plant design and operating practices. Relines can either be done in-situ with the furnace unavailable for steelmaking during this time, or via a shell exchange system. With this latter approach two shells are available, one in use and one being relined, so minimising plant downtime. Off-line relines also provide better working conditions for personnel and can reduce gunning requirements.