Casting of Backing Layer for Ladle Bottom (Construction Time: 1 Day)

Casting of Backing Layer for Ladle Bottom (Construction Time: 1 Day)

    Firstly, fix Permeable Brick and Ladle Nozzle Well Block, and then plug the inner hole with some resilient staff.

    Secoendly, weld some anchoring nails in the middle area of ladle bottom between one well block and another, the vertical and horizontal distances between every two anchoring nails are 25mm and 30mm.

    Thirdly, mix backing layer castable for ladle with about 5% of water, and then stir it for about 20 minutes till smooth.

    At last, pave the mixed backing layer castable at the bottom of ladle, and then vibrate it to 100mm in thickness by flat vibrator.

Casting of Backing Layer for Ladle wall (Construction Time: 1 Day)

    After maintenance of bottom permanent layer, stick a layer of high alumina fiber mat which is 10mm in thickness with the ladle shell. Then place the mould right in the middle, flat, no deviation. The mould surface should be clean, smooth and greased for easy demould.

    Lay the mould properly to ensure that the gaps between mould and sidewall are the same, then pour the mixed backing layer castable into the gaps, vibrate it by vibration bar till no bubble emerges(If mould is unavailable, cast working layer first and then permanent backing layer). The bottom of permanent backing layer is 100mm in height; vibrate 300-400mm per time, and its 90-100mm in thickness, then one circle by one circle till to the top.

    After vibration of permanent backing layer, lift the ladle to an area at higher temperature, so that it is convenient for water evaporation and drying of cast body. The time of demould should be more than 12 hours, usually 24 hours, specific time depends on lining harden situation.