Manufacturer – 3Sigma
Product – Diatomaceous Earth & Molybdenum
Case History #116
Rio Tinto, a western mining operation, was in process in opening a new Greenfield facility. Within this process they required two volumetric feeders to feed two products, diatomaceous earth and molybdenum, in a pulseless fashion to their mills. This is critical in allowing the mills to run without excessive loading thereby eliminating surges, yielding a more tightly defined product.
A local supplier, who was awarded a large contract with the mine, contacted 3Sigma in order to provide the solution their customer desired. Their requirements:
-Provide a pulseless dry material feed for diatomaceous earth at a rate of 400 PPH.
-Provide a pulseless dry material feed for molybdenum at a rate of 7,600 PPH.
-Provide two identically sized dry material vibratory feeders to minimize spares and ease of operator use.
-Provide load cells, which will be connected to the client’s PLC, to maintain a constant head pressure.
-Provide a trouble free system that will allow for proper operation for years with minimal maintenance issues.
To Meet These Requirements 3Sigma Provided:
-Two 18” GeoMate dry material vibratory feeders, each coupled with 15 CF MassMate mass flow hoppers and each with a three point scale.
-The scale is integrated with the client’s control system to maintain the hopper level at all times.
-The MassMate hopper has been designed for mass flow and with the hopper outlet designed to be greater than the products arching dimension to ensure mass flow.
-The loss-in-weight vibratory feeder is flexibly connected at the inlet and discharge to provide dust tight operation.
15 CF MassMate Mass Flow Hopper
Three Point Scale System
Flexible Sleeve to Isolate the FeedTray from the Hopper
18” SS GeoTray with a 6” dia. outlet
-The loss-in-weight GeoMate dry material feeders was installed in the third quarter of 2012.
-The loss-in-weight dry material feeder operates within the customer's accuracy requirements freeing the operator from constant rework.
-No more squealing from screw conveyors. No more "pretzeled screws". No more maintenance.
-To date the feeder system has met all requirements without any downtime.
18” GeoMate Dry Material Feeder Post Production Testing