Composite thermal insulation board for revolving furnace ladle

The utility model relates to a composite heat-insulated board for converter ladle, which can effectively solve the problem of insulation of converter and ladle and prolonging the service life. The technical proposal is that: the structure of the heat-insulated board is improved and the structure of the utility model is an arc shaped globoidal body with front part larger than the rear part, forming a wedge shape or ladder shape; the upper arc surface and the lower arc surface share the same circle center, forming two parallel arc surfaces. The utility model has simple and novel structure, easy production, convenient application, small gap, good insulation, long service life, good quality of produced product, obvious economic effect, when being applied to composite heat-insulated board for converter ladle, and is an innovation on the basis of the structure of the current heat-insulated board.