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将石灰石和碳化硅之类不同硬度、粒度范围在1～40μm的细物料放在两个不同装置中挤压．用碳化钨砧座以最高2000MPa的压力一次挤压，用4活塞砧座以最高700MPa、方向交变的压力对物料层多次挤压．实验表明，对于石英、硅酸锆、碳化硅和熔炼刚玉这样的硬物料，能量吸收是粒间破碎的主要影响因素，而压力在100～700MPa范围内，甚至高达2000MPa时，对刚玉来说，却不影响破碎结果．但对中硬石灰石来说，如果在较低压力下供给同样的能量，则其破碎细度取决于压力．极细和微细粒的产出量随着给料硬度的增加而急剧减少。在多次挤压料层粉碎条件下生产微细物料的能量消耗远低于通常的粉磨工艺．但这种方法需要2～3μm粒度的分级，这是不易实现的。
Fine materials such as limestone and silicon carbide with different hardness and particle size in the range of 1 ~ 40μm are extruded in two different devices. With tungsten anvil to the maximum pressure of 2000MPa a squeeze, with 4 piston anvil to the maximum 700MPa, the direction of alternating pressure on the material layer squeeze several times. Experiments show that for quartz, zirconium silicate, silicon carbide and fused corundum such hard materials, energy absorption is the main impact of particle size crushing, and the pressure in the range of 100 ~ 700MPa, even up to 2000MPa, for corundum, Does not affect the broken results. However, for medium-hard limestone, if the same energy is supplied at lower pressure, the fineness of the crushing depends on the pressure. The output of very fine and fine particles decreases sharply with the increase of feed hardness. The energy consumption to produce the fine material under multiple crushing conditions is much lower than the usual grinding process. However, this method requires the classification of 2 ~ 3μm particle size, which is not easy to achieve.