To achieve feedforward control, we must solve two problems: (1) study the shape and size of the ore sample; (2) characterize the way in which the ore is cracked and cracked under pressure. To determine the relationship between the fractal dimension of a new broken particle and the crack structure that causes the ore to break, it is necessary to avoid the wear of the particle before measuring the fractal dimension of the particle. Similarly, if you want to find the fragmentation mechanism of ore based on the fractal dimension of the fragment, it is too late to observe the particles that are worn by the ball mill.
In order to obtain dense materials, it is clear that the accumulation of equal-diameter spheres can not meet the requirements. Therefore, when making dense refractories, from the point of view of stacking, the best way is: first pile up large pieces of rubble together, then fill smaller stones into large stones; the second step is to make finer The sand infiltrated into the gap between the previous large rock and the smaller rock, vibrating these dry filled balls, allowing various components to enter the structure; the last to join this structure is a thin slurry, The surfactant has been added to the mud to help moisten. After the slurry is poured into the stack, the entire system is integrated. Of course, in practical applications, it is necessary to have a certain deviation from the theoretical size distribution function, so as to ensure that various components can penetrate into various internal voids, that is, continuously penetrate into smaller and smaller particle structures. Practice has shown that rather than using a continuous distribution of components, it is better to have a certain gradient ratio, and the size of the smallest particles added in the actual refractory material that can be produced and able to infiltrate the entire refractory structure is obviously limited.
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