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焦炭负荷和焦炭在风口前的失碳率随着煤比的提高而增大,而焦炭强度则随着失碳率的提高而降低,因而焦炭在高炉内各部位所承受的压力,成为进一步研究极限煤比的基础。根据高炉炉料的散料特性,采用微元平衡法,对散料体中的任意微元体应用守恒定律,建立连续方程和运动方程,并结合状态方程,建立二维炉料压力数学模型。然后采用数值差分法对流函数和压力函数进行差分推导,设定流场和压力场的边界条件,对高炉内各点进行迭代计算,并用VC++进行程序代码设计得出了压力场分布规律。
Coke load and coke in the tuyere before the loss of carbon rate increases with the increase of coal ratio, and coke strength with the loss of carbon rate decreases, so the coke in various parts of the blast furnace pressure, a further study The basis of the limit coal ratio. According to the characteristics of bulk material of blast furnace charge, by using the element balance method, the conservation law is applied to arbitrary micro-bodies in bulk material, the continuous equation and the equation of motion are established, and the mathematical model of two-dimensional charge pressure is established with the state equation. Then, the numerical derivation method is used to derive the differential function of the flow function and the pressure function. The boundary conditions of the flow field and the pressure field are set. The iterative calculation of each point in the blast furnace is carried out. The pressure field distribution is obtained by using VC ++ program code design.