分級機下開口高低、分級機下開口大小、分級機上開口高低、分級機上開口大小是在設備安裝期間進行現場制作，在許多選廠，因為在設備安裝中分級機開口大小高低沒有進行調整好，而工人在操作過程中又不太留意，無形也是影響了磨礦作業。分級機下開口低，相對是礦砂沉淀區大了，所以返砂量將大，磨礦細度相對細，分級機下開口大，相對是礦砂沉淀區大了，水流較為平緩，所以返砂量將大，磨礦細度相對細，分級機上開口低，返砂量相對大，磨礦細度相對變細，分級機上開口大，相對返砂量相對大，磨礦細度相對變細。否則相反。我們要假定其它影響因素一切正常，原則是：在磨礦細度一定的情況下，我們要最大化地提高處理量，這樣可以有效地提高生產效率。（大部分礦石，特殊礦種除外）相對而言，磨礦細度越細，有用礦物與脈石礦物的解離越充分，對提高金屬的回收率有利，所以在處理礦量一定的條件下，盡可能地提高磨礦細度。另外，磨礦是選礦工藝的第一環節，為了保證生產的穩定，磨礦要盡可能的保證穩定。 在給礦量一定的情況下，排礦口處沖水大小、給礦量大小直接影響磨礦的細度粗細，在國內許多礦山現沒有實現磨礦自動化，水量的大小，直接由球磨工進行手動調節，因為這兩處的水流較大，增大與減小很難看出，所以必須要求進行細致的觀察與細微地調整。首先我們一定要明白，節能球磨機給水增大，磨礦濃度變稀，磨礦細度會變粗，相反，節能球磨機給水減小，磨礦濃度變大，磨礦細度會變細。節能球磨機排礦口處沖水變大，溢流變稀，溢流細度變細。相反，節能球磨機排礦口處沖水變小，溢流變濃，溢流細度變粗。所以在其它條件包括礦量不變的情況下，要提高磨礦細度，可以把節能球磨機給水減小，節能球磨機排礦口處沖水增大，最好這兩個條件同時調整，以保證盡可能減小因為磨礦細度的調整引起礦槳量的變化因而引起浮選的波動。
Classifier opening height and the classifier opening size, classifier opening level, the classifier opening size is during the installation of on-site production. In many plant, because in the equipment installation classifier opening size and height are not adjusted well, and workers in the operation process and not so aware, intangible and affects the grinding operation. Classifier with low opening, the relative is ore precipitation area big, so the returned sand amount will, grinding fineness is relatively fine, classifier under large openings, is relatively ore precipitation area big, the water flow more quietly, so back to the sand content will, grinding fineness is relatively fine, classifier with low opening, returned sand amount is relatively large, grinding fineness is relatively thinner, classifier on a large opening, relative return sand content relatively high, grinding fineness became relatively thinner. Otherwise. We have to assume that other factors that affect the normal, the principle is: in the grinding fineness of certain circumstances, we must maximize the amount of treatment, so that we can effectively improve the production efficiency. (most of the ores, with the exception of the special types of minerals) in relative terms, grinding fineness finer, the dissociation of useful minerals and gangue minerals more fully, to improve metal recovery rate favorable, so in the amount of ore handling certain conditions, as far as possible improve grinding fineness. In addition, grinding is the first part of mineral processing technology, in order to ensure the stability of production, grinding to ensure the stability of the. Under some conditions to the ore, row ore mouth at flush size, to the amount of ore size directly affect the thickness of the fineness of ore grinding, in many domestic mines now did not achieve the grinding automation, the size of the water directly by ball grinder were manual adjustment, because of the large flow, increases and decreases it is difficult to see, so must require careful observation and fine tuning. First of all, we must understand that the energy saving ball mill feed, grinding concentration of dilute, grinding fineness will become rough, on the contrary, energy-saving ball mill feed, grinding concentration becomes large, grinding fineness will become fine. The port of discharge at flushing energy-saving ball mill becomes large, overflow overflow fineness dilute flow. On the contrary, such milling discharge mouth flushing overflow becomes small, thick, thick overflow fineness. So in other conditions including ore quantity is unchanged and in order to improve the grinding fineness, can reduce the energy saving ball mill feed, energy saving ball mill discharging mouth at flushing increases, the best the two conditions are adjusted at the same time, in order to ensure as far as possible to reduce because the grinding fineness adjustment caused by fluctuations in the ore oar volume changes due to the flotation.
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