The heating riser not only has the advantages of insulation riser, but also has the effect of combustion heating, and the combustion temperature can reach 1450 ℃; On the basis of high heat generation, it can be reduced, and under the same conditions, it can be shrunk. The use of risers can also effectively compensate for shrinkage, and the utilization rate of molten steel can be increased by 50% to 75%.