Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide) 2017-04-04T06:57:31+00:00
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Froth Flotation Automation Camera (7 replies)

Obergruppenfuhrer
1 year ago

My colleagues are developing an artificial vision system that analyses the froth flotation process, I am very interested to get involved in this development but I'm not really familiar with the parameters they are analyzing. I've heard of the following: "Stability, Bubble Size, and Bubble/froth pouring/movement speed". Are there any standards for these parameters? Any information would be much appreciated.

Oberstorm
1 year ago
Oberstorm 1 year ago

I think (but I may be wrong) there is no standard terminology agreed on froth image analysis parameters, but some are rather obvious and self explanatory, e.g. froth velocity and bubble size.

A lot of research on this subject has been done in the Pyhäsalmi Mine flotation plant, and the results have been made publicly available in a doctoral dissertation, which you can freely download from here:http://is.gd/DWhaph

Victor Bergman
1 year ago
Victor Bergman 1 year ago

There are already a number of these types of systems on the market, how is yours going to be different?

See;

Metso-Visiofroth

CANTY-Froth Control System

Outotec-FrothSense

CEMI - Froth Control

Bluecube - Tempotrack

SGS – METCAM

KnowledgeScape–

PlantVision

Amar
1 year ago
Amar 1 year ago

It is very simple. Froth stability or bubble coalescence can be estimated by measuring the bubble size distribution as a function of froth height. This has been published in so many papers.

Obergruppenfuhrer
1 year ago

We are working to eliminate the need of computer servers and create our own embedded system capable of receiving the cameras info, apply the algorithms and then generate results directly into the controller. Let’s say that it should be another remote node that any given controller can detect and recognize by being on the same network.

Oberstorm
1 year ago
Oberstorm 1 year ago

Just being curious, why exactly do you want to eliminate server computers? There are rugged ones that can handle industrial environments. And ultimately, isn't your proposed embedded system a computer?

Obergruppenfuhrer
1 year ago

You are right, an embedded system is basically a computer but working for a specific task. Basically to minimize costs, implementation times, increase compatibility and to bring a collection of instruments that can be perceived as just an addition to the improvement of the process. I don't know if I'm being clear enough, I'm not a native English speaker, if you or any other of you has any more questions feel free to ask.

Tarun Karakoti
1 year ago
Tarun Karakoti 1 year ago

Yes what you say is correct. There are standards we need to look at and adopt. Due to lack of knowledge in operation, many neglect these points. Many operators are discourages for their hard work in plant and went un-noticed. Few such standard parameters are discussed. We need to start writing such standards in ISI standards.

•FROTH BUBBLES: It should be as small as possible. Simple logic for this statement is:

•Imagine 1, 2, 3, 4 Inches bubbles floating. Did anyone calculate the area of space in between bubbles? It is very dangerous and unimaginable when you come to know that we are floating middling and silica along with bubbles in-spite of using cleaners it is difficult to avoid.

•Now imagine small bubbles of 1mm. Calculate inter space you find lot of difference. No one did research on such topics. Innovative technology today developed for such micro bubbles are:

•Jameson cell, Column flotation gas spargers, etc. Where we generate micro bubbles and also wash these bubbles at 0.5 to 1 meter bed with water tiny showering water from top. This water goes inside inter space to remove all silica entrapped and middling to give clean concentrate.

•REAGENT FEED FORWARD AND FEED BACKWARD DIDC CONTROL SYSTEM:

This system was developed in Australia and used in INDIA at HZL since 1988. It analysis slurry for Pb, Zn, Fe in feed, concentrate, and tailing every second, this information given to DIDC to all reagent dosing pumps--to increase or decrease flow rates of reagents to control, Concentrate grade, tailing. This improved 30% yield, Grade, and reagent consumption. Plant is operated form Air conditioned Control room.

•Similarly for other parameters

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