Heat accumulative roller bottom heating furnace

The invention relates to a heat accumulative roller bottom heating furnace, which belongs to the technical field of steel rolling equipment. Through the application of the heat accumulative combustion technology, the heating quality of steel blanks is improved, and the coal gas consumption is reduced. The invention has the technical scheme that the heat accumulative roller bottom heating furnace comprises a furnace body, a furnace hearth and heat accumulative burner nozzles, wherein the heat accumulative roller bottom heating furnace comprises a plurality of heat accumulative burner nozzles which are uniformly distributed on the upper layers of both sides of the furnace in the furnace length direction, coal gas spray openings and air spray openings are arranged in the heat accumulative burner nozzles, the coal gas spray openings are distributed in the center of the heat accumulative burner nozzles, the air spray openings are uniformly distributed in the peripheral direction of the coal gas spray openings, eac