1951年,在美国阿里斯·查尔默斯公司研究破碎磨矿的邦得(Fred. C. Bond)发表了一个关于破碎和磨矿的新理论。这是继1867年雷廷智发表的“面积假设”理论和1874年俄国的基尔皮切夫教授发表的“体积假说”理论之后的第三个有关破碎和磨矿方面的理论,故又称为邦得第三破碎理论。邦得第三破碎理论认为:“一定重量的均匀破碎矿物在磨矿时有效消耗的全部能量与磨矿 In 1951, Fred C. Bond, a researcher at Ares Chalmers Research in the United States, published a new theory about crushing and grinding. This is the third theory of crushing and grinding after the theory of “Area Assumption” published by Reithin in 1867 and the “Volume Hypothesis” theory published by Professor Kilpitchv in 1874 in Russia, so it is also called For the state third broken theory. State of the third broken theory that: "a certain weight of uniform crushing minerals in grinding effectively consume all the energy and grinding