Tests and reports

A Test in Time Saves Mine

For more information please download our detailed information sheet.

IMS Magnetic X-ray system will pick up whether the magnets inside your drum have been moved, weakened, damaged or covered with magnetite, drastically reducing the efficiency of magnetic separators.

Tests and reports

We test and Repair Magnetic Wet Drum Separators

We can test them at a scheduled shut down of your line. We can test all your drums in one day.

Having tested in excess of 350 pieces of magnetic equipment throughout NSW and Queensland we have found a number of items that were not working to operator expectations. Statistically this suggests there is other magnetic equipment in YOUR industry not operating correctly.

The companies that were previously unaware of their equipment problems have now taken the corrective action recommended by International Magnetic Solutions and are well on the way to improving the efficiency of their plants.

Description of magnetic setup and testing:

The magnet assembly inside the drums are usually set up in an arc of alternating poles. North, South, North, South, North and so on until the preferred arc angle is reached. A typical arc angle is around 130 deg.

This alternating magnetic pole pattern develops an external alternating magnetic field pattern in both radial (Vertical) and circumferential (Horizontal) directions around the drum.

The IMS testing procedure measures these alternating Field patterns in 3 positions along the axis of the drum. At the Drive End, Centre and Non Drive end.

The test results show the Vertical and Horizontal field patterns separately at each test position. These field patterns directly influence the recovery efficiency of the drum. Any alteration to the magnetic system will be reflected in this field pattern which will also result in higher magnetite losses.

Examples of what we find when there are anomalies in the magnetic test result graphs:

Broken Magnet Banks showing significant differences in magnetic profile

Magnets that Moved showing a very mutilated pattern on the graph

Typical Test Report Layout

What does IMS test?

Our current standard testing procedure is based on the assumption that the current manufacturers of magnetic equipment have optimised the field strength and gradients in their equipment designs. As this is controlled by the geometry of the design the relationship between field density and gradient is fixed.

So measurements of field density indicate relative change in both flux density and effective field gradients. As both of these factors combined control the equipment operation we get a good picture of changes in magnetic efficiency.

Hence our test reports give you comparative information on the magnets in your equipment by comparing the magnetic characteristics of your equipment to other equipment of the same type in service and identifying changes in your Drum’s Magnetic characteristics.

The test results tell the story in two ways:

  • Is your equipment as strong as it should be?
  • Is your equipment’s performance deteriorating?

If it is found that the strength is significantly low or is deteriorating corrective action can be taken before it significantly affects efficiency.


Test results are presented in two formats:

  • Table of readings
  • Graphical report

The graphs have been designed to give a visually meaningful representation of the test results, and compare your specific equipment with our database average for your type of equipment.


(Please click on the image for a larger view of the test report)

The database is designed to identify and combine the results of all tests carried out on any specific drum type. Hence the graphical reports generated as a result of future tests will show all test results on one graph as well as the Mean of our database.

The graphical report provides immediate visual representation of any changes in the magnetic properties of the equipment. Any deterioration is obvious and corrective action will be recommended by International Magnetic Solutions if the change is significant.

If the graph shows no change in magnetic performance yet you identify changes in efficiency the equipment setup should be checked. If the setup is correct it would then be reasonable to assume that the equipment magnets are not the cause of your problems.

These reports should help to make your maintenance job a bit easier.

Reduce magnetite consumption – Improve plant operating efficiency

Adjustment or repair to magnetic mining equipment can reduce magnetite consumption, which can significantly increase plant efficiency and cut operating costs. Whether your plant is operating efficiently and you want to sustain your economies, or your equipment is deteriorating or low in strength, International Magnetic Solutions can help you cut operating costs and improve efficiency.

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