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建立了国内某4070 m3高炉并罐式无钟炉顶装料系统模型,应用离散单元法对焦炭炉料分别装入左右料罐的运动全过程进行数值计算.结果表明,由于高炉并罐式无钟炉顶系统中皮带中心线与两并罐对称面成22o夹角,炉料装入左料罐时料流宽度较小且密集,而装入右料罐时料流宽度较大且分散;左右料罐径向上炉料体积呈非对称分布,左料罐内炉料堆尖位置与两并罐对称面之间的距离比右料罐近200 mm;左料罐周向上炉料体积分布比右料罐更均匀,二者在周向上的方差分别为0.065和0.261;左右料罐径向及周向上炉料粒度分布主要受堆尖位置和壁面效应影响,左右料罐纵向上炉料平均粒径分布规律基本相同,从料罐内料层底部至料层高度1/9处炉料平均粒径逐渐增大,料层高度1/9~8/9处炉料平均粒径基本不变,从料层高度8/9处至料层顶部炉料平均粒径继续增大.
A 4070 m3 blast furnace and potless bell-top charging system model was established in China, and the discrete element method was used to calculate the whole process of charging the coke charge separately in the left and right material tanks. The results show that, The central line of the belt in the roof system forms a 22o angle with the symmetrical plane of the two parallel cans, and the flow width is smaller and dense when the charge material is loaded into the left material canister. When the material is loaded into the right material canister, the flow width is larger and dispersed; Canister radial charge volume was asymmetric distribution, the left material within the furnace can stack tip position and the two cans symmetry plane distance between the right material cans nearly 200 mm; left material cans circumferential charge material volume distribution than the right material more evenly , Respectively. The variance of the two in the circumferential direction were 0.065 and 0.261 respectively. The distribution of charge in the radial direction and the circumferential direction of the left and right tanks was mainly affected by the location of the tip of the pile and the effect of the wall. The distribution of the average particle size of charge in the longitudinal direction of the left and right tanks was basically the same. The average particle size of the charge increased gradually from 1/9 to 8/9 at the height from the bottom of material tank to the material height of 1/9. From the material height of 8/9 to The average size of charge at the top of the material layer continues to increase.