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邦德(Bond)功指数 Wi作为原料可磨度的一个参数并非物质常数,而是随着磨矿产品粒度的变化而变化。因而,对于给定的磨矿产品粒度,当其功指数 Wi 未知,而需由试验确定时,我们就可以预计由邦德公式确定能耗时遇到的困难及其产生的误差。本文将讨论这一问题并提出一些解决的方法。采用铜矿石、安山岩及石灰岩进行试验研究后发现,通过试验筛的物料量变化与筛子的筛孔尺寸 P_k 的关系不是公式 G=K_1√P_k;在邦德磨机中,磨矿产品粒度 P 即80%的磨矿产品能通过的筛孔尺寸与试验筛筛孔尺寸 Pk 的关系可以用公式表示为 P=P_k/K_2。如果已知功指数 Wi 和筛子的筛孔尺寸 Pk,就能用 G 和 P 的函数式计算出任何其他粒度的磨矿产品的功指数 Wi。
Bond Work Index Wi is a material that can be worn as a raw material, not a material constant, but a variable grain size of the abrasive product. Thus, for a given particle size of the grinding product, we can predict the difficulties encountered in determining energy consumption by the Bond equation and the errors that occur when the work index Wi is unknown and needs to be determined experimentally. This article will discuss this issue and propose some solutions. Using copper ore, andesite and limestone experimental study found that through the test sieve changes in the amount of material and sieve mesh size P_k relationship is not the formula G = K_1√P_k; in the Bond mill, the grinding product size P That is, the relationship between the mesh size that 80% of grinding products can pass and the mesh size Pk of the test sieve can be expressed as P = P_k / K_2. If the work index Wi and the mesh size Pk of the sieve are known, the work index Wi of the grinding product of any other grain size can be calculated as a function of G and P.