Gravimetric feeder for glass balls and chips.

(Nuclear industry)

Goals:  Feed repeatedly and reliably small amounts of   glass  balls or glass chips to be mixed with the nuclear fuel cycle ends. The difficulty is to dose materials with very differentes flow characteristics (free flowing , but difficult to control for the balls and difficult to extract for the chips).
  The metering accuracy required, and + / - 0.5 g. The system was skid mounted and tested in our workshops.     

Benefits of MCPI Fine dosing solution: The ability to control the feeding of the balls with a  repeatable overshoot value which ensures accuracy. This feeder also provide an accurate operation with poor flowing glass chips . MCPI Fine dosing feeders are insensitive to the wear generated by the extreme aggressiveness of glass chips. A fast discharge of the feeder is provide by the second outlet is a great benefit for the operator: it offers the flexibility of using both products with minimal changeover time.

Performances / technical data:

Pictures:

General view of the  skid mounted feeder .

Detail view of the swiveling bowl and load cell (protected in a stainless steel housing).

Extractor outlet.	Discharge of ingredient with reverse motion and a second outlet

Results

Dosing of glass balls, diameter 4 mm:  60g in 12 sec, standard deviation: 0.19 g

Fine dosing SPA-A : Indium balls Ø 1.5 mm - set point: 6 g  - Standard deviation: 0.028 g

MCPI weighing controllers for an easier operation and a better process control

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