Coal milling equipment for sale in india

07/06/2014 Pet Care Products

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At that point, the overload current of the particular drive motor 25 or 26 concerned, actinm hrc.ugh its associated current transformer, either 2~ or 31, will actuate its particular overload-sensitive device,<a href="">coal crushing plant</a> either the magnetic float relay 20 or he magnetic float relay 29, to close electrical circuit 32, and to thereby change the condition of magnetic switch 33 so the normally contacting switch-contacts 33b are thrown out of contact, and those which are not normally in contact are throwv into contact. In this manner, motor 33 is reversed whenever a condition of overload in either of the machines of the plant is reached, the setting of the variable reactance device 25 is appropriately changed, and movement of orefeeder &2 is decreased, resulting, of course, in iessening the quantity of ore I i fed into boot 4, and thereby relieving the overload condition.

It can easily be seen that, should a ball mill, classifier, and other ore-processing equipment also form a part of the plant, a proportionate number of additional magnetic float relays could be connected into electrical control circuit 32 for enabling such equipment to share in determining the rate of feed of ore II to the plant as a whole 4. It is advantageous that the increase in the rate of feed,<a href="">gold milling equipment</a> up to the point where some machine of the system reaches an overload, be gradual, and also, that the control not be exercised so frequently as to place undue stresses on the feed a mechanisms or on the control mechanisms themselves. Accordingly, it is preferred that regulation of the feed be confined to periods of suitable length which occur at predetermined regular time intervals.

For this purpose, a time switch 40 of conventional design may be connected into electrical circuit 34 so that the switch contacts 40a thereof, open and close such circuit 34 periodically, as determined by the setting of the time mechanism . B. It is advantageous that the time mechanism be electrically driven, as by the electrical circuit 41.

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