feldspar processing

PTMS MAGNETIC SEPARATOR

what is magnetic separation method in hindi？

   Do you know the correct steps to test the strength of the magnetic field? Detailed description below

In most cases, smaller permanent magnets should be subjected to a half-year tensile test to evaluate the magnetic field strength. These permanent magnets include:

Magnetic Board - Function: Prevents small and medium size contaminants. They are mounted in chutes, nozzles, pipes, and suspended from non-magnetic conveyors and screens.

Magnetic Grille - Function: Removes fine iron filings from dry and free-flowing products. They are designed for steeply inclined hoppers, even for odd and irregular shapes, floor openings, vertically closed chutes and pipes.

Grid in the shell function: When free-flowing products are arranged through multiple grate rows in a custom-made enclosure, the iron contaminants can be removed.

Magnetic Trap - Function: Purifies products in liquid and slurry tubes by removing small particles of scale and iron oxide contaminants.

More in-depth insights

How to perform proper pull test

The pull test procedure begins with cleaning the surface of the magnet. Even a small gap between the tensile test piece and the magnet can adversely affect the test results. Then use the following steps:

Select the appropriate tensile test piece and gasket for the separator based on the guidelines in the tensile test kit - and connect to the scale. Aluminum gaskets are 1⁄4" to 1" thick, and test pieces range from 1⁄4" steel balls to stainless steel rods (for test grate or tubular magnets) to 1 x 3 x 1/8" plates (for Plate magnet).

Use the appropriate tension test piece to zero the scale by rotating the top adjustment knob until the scale line measures zero.

Let the part attract the magnet and make the ruler perpendicular to the magnet surface.

Pull the scale directly away from the surface of the magnet to make it even and even. Be careful because the part may accidentally appear suddenly from the surface of the magnet. The measured value is recorded by reading the red slider down the cylinder of the scale.

Repeat the test to verify the results.

For accuracy, it is recommended that you record an average of three to four pulls. Compare the pull test value every six months and look for a downward trend. If the latest pull test value is less than 10% to 20% of the original pull test value for any given magnet, check that the magnet is likely to be repaired or replaced.

Different test pieces may distort the results

There are many different magnet manufacturers that offer pull test kits. Although the tensile test kits look similar, the test pieces may vary depending on design, weight, diameter, and composition. Different tensile test pieces produce different measurements, which can lead to confusion and misleading results.

For example, measuring the same rare earth tube magnet using a 1/4" diameter test piece from a different magnet manufacturer will produce significantly different results.

Other tensile test kits may only include test pieces with a diameter of 1/2 inch for RE tubes and grate magnets. According to the standard operating procedure, the test piece is too large to accurately measure the tension on the more sensitive RE magnet.

The changes in these test pieces are very important because they allow some magnet manufacturers to claim that their RE tubes and grate magnets produce higher tensile test values ​​than competitors. Tensile testing is widely used to compare the relative strength of a given magnet in any industrial environment, including food manufacturing. The only way to accurately compare the tensile strength of competitive magnet manufacturers' magnets is to use the same test piece for side-by-side comparison.

Pulling the test results can help determine if (or when) the magnet needs to be replaced. Regardless of the test results, the magnet with visible cracks or worn holes should be removed from the operation immediately. For six months to a year, magnets with a 15-20% reduction in retention should also be replaced, especially if the magnet is at a critical control point.