Grinding & Classification Circuits

Grinding & Classification Circuits 2017-04-04T06:57:16+00:00
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Outotec MillSense real-time mill charge analyzer (3 replies and 1 comment)

Ace Levy
1 year ago
Ace Levy 1 year ago

Has anyone had any experience with the Outotec MillSense real-time mill charge analyzer? It is a very innovative approach but does it work? Are you using it for day to day decision making?

1 year ago
Obersturmbann 1 year ago

No. But I think that the concept by the MillSense is not that accurate. They determine the loading of the mill based on the mill motor current. This type of measurement by nature is rather slow. The current transformer is by definition "a transformer" and as such will have a natural time delay. The big/fast variations are not necessarily pick up or recorded. If the current sensor could be improved to "react faster" then maybe this concept could be used.

The type of measurement done with some sort of vibration sensors on the mill shell are definitely better and will give more information of the load condition of the Mill.

Raje Singh
1 year ago
Raje Singh 1 year ago

Very interesting concept, do you have an indicative cost of purchase and install. Wonder how much optimization can be achieved and how practical is the application on day to day mill operation. As pointed out the instrument relies on current draw when the lifter liner impacts the charge, there are many other factors that impact this. I suppose one can also get an instrument for every other factor/parameter.

Peter Blanz
7 months ago
Peter Blanz 7 months ago
1 like by David

Hi guys,

I'm the product manager responsible for MillSense (as well as our other Sense products for concentrators). It's great to see that there is interest in our volumetric charge measurement, but you should know that the measurement principle of MillSense has been completely changed. We had to abandon the old 'current oscillation' method, since it simply wasn't reliable enough on most mills.

These days, we are using an on-shell sensor that attaches to one of the lifter bar bolts and uses strain gauges and accelerometers to accurately measure the toe (and shoulder) angles. The sensor is attached to a wireless tansmitter and the whole thing is inductively charged to eliminate the need for playing with batteries. The attached photo shows the sensor and transmitter moments before mill start-up.

So far, we have tried the new and improved MillSense on 6 SAG and AG mills around the world, and all installations have been successful. Don't hesitate to ask if you require more information about MillSense or other Outotec products!

7 months ago

Welcome to 911M Peter

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