Tundish is an important equipment for continuous casting process, its refractory lining mainly includes heat insulation layer, permanent layer and working layer.
(1) The main function of the insulation layer is thermal insulation, usually with asbestos board insulation bricks or light castables, aluminium silicate fibre mats, and nano-microporous insulation boards plus light insulation bricks
(2) The permanent layer is in contact with the insulation layer and is mainly used for safety and protection. In the early days it was mainly built with clay bricks, but later high alumina bricks, high alumina or semi-light mullite castables were used.
(3) Working layer steel contact, early use of high alumina bricks, later use of insulation plate, and then later with refractory coating material and refractory spray coating. With the development of multi-furnace continuous casting technology and quick change technology of water spout, dry vibrating material was started. Adiabatic plate is generally siliceous, magnesia and magnesia olivine quality, coating and dry material more magnesia, magnesia calcium and magnesia chromium quality.
(4) The bottom area of the tundish usually uses prefabricated blocks to enhance, generally corundum and magnesia and castable materials, some use zirconite brick or castables materials.
(5) Slag stopper weir generally with high alumina, alumina-magnesia and magnesia prefabricated pieces.
(6) Plug bar is to use aluminous carbonaceous or magnesia carbonaceous material.
