湿式ボールミル粉砕回路におけるフィード量変化の影響について

湿式ボールミル粉砕回路の制御に関する研究 (第2報)

抄録

In order to apply some control systems successfully to the process considered, it seems neccessary in the first place to get enough informations about the characteristics of the object to be controlled.
In the previous report some investiaations were carried out on static characteristics of the object-that is, ball mill.
In the present paper some experimental data obtained by laboratory scale wet ball mill were discussed from the viewpoint of static as well as dynamic characteristics of ball milling process.
The main, conclusions can be summarized as follows.
i) The same relationships as previously presented were recognized among the variables feed rate F_MS, hold up H_s and grinding energy E. That is.
H_S ∝√F_MS
E ∝ H_S
ii) Indicial responses of some variables-discharge rate of each size fraction of the product, and the hold up were examined. The response curve of the latter variable could be well approximated by that of an element of first order.
iii) On the basis of the experimental data controllability of a typical closed grinding circuit was discussed. In this case it-was observed that the productivity of the grinding circuit and the stability of the control system could not be compatible.