Cement Grinding Unit Into a Mixing Apparatus

A seof which the averaged material may he carried to a suitable mixing apparatus, as shown in Fig. 4.. In Fig. 1, for the purpose of clearness, I show the belts 16 and 21 as being extended 011 different planes; but preferably these belts are arranged side by side, as shown in Fig. 2. .The said mixing apparatus comprises two bins or receptacles 22 23, one for containing cement-rock and the other for containing limestone. capacity-say one hundred tons each. A movable feed-spout 2 1 is pivoted above the two bins, whereby material from the belt 21 may be deposited into one or the other of said bins. Each of the bins 22 and 23 is provided with a roller-feed 25 therein, and located beneath said roller-feeds are smaller receptacles 26 and 27,cement grinding unit carried on platform-scales 28 and 29, of any desired construction. rial from the receptacles 26 and 27 may be controlled in any suitable way. From the receptacles 26 and 27 the material may be drawn off by means of spouts 30 and deposited into a mixing apparatus 31, of any suitable type. I illustrate diagrammatically a well-known form of rotary mixer for this purpose, said mixer being provided with ribs extending longitudinally thereof to thoroughly agitate the material.

Located beneath the mixing apparatus 31 is a hopper 32, into which the mixed material may be deposited, said hopper being provided with a roller-feed 33 for feeding the mixed material therefrom onto an endless conveying-belt 34, leading to a suitable storagev stock-house for the mixed material.In order to carry the material from the crushing plant, I prefer to employ a conveying-belt 35, between which and the conveyer 4 may be located a sampling apparatus 36 of any suitable type, arranged to automatically remove from the material falling from the belt 35 a small sample at regular intervals of timefor instance, one pound each minute. These samples from the sampling-machine are conveyed by means of a chute 37 to a sample-receptacle 38. v