针对传统灰带段法模型在求带辐射全交换面积时不考虑发射源温度的不足，提出了一种灰带模型与段法结合的新方法．新灰带段法模型的机理更接近于射线跟踪．用两种灰带段法模型计算了简单加热炉中加热物料吸收的净辐射热流随炉壁黑度的变化，并将计算结果与较成熟的灰气体加权和模型（ＷＳＧＧＭ）进行比较，证明了新灰带段法模型是正确的 Aiming at the shortcomings of the traditional gray band model without considering the temperature of the transmitting source in the process of seeking full radiation area, a new gray band model and segment method are proposed. The mechanism of the new gray band model is closer to ray tracing. The net radiative heat fluxes absorbed by the heating material in a simple heating furnace were calculated with two gray band models. The changes of the black radiant heat flux were compared with those of the more mature gray gas weighting model (WSGGM) The new gray band model is correct