Yaotai Metallic Magnetic Liner

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Magnetic liners are composed of non-magnetic steel combined with permanent magnets. Theyrely on magnetic attraction to adhere to the inner wall of the mill. The inner working surface ofthe liner features an open alternating N -S magnetic field, which attracts fine grinding mediawithin the ore charge to form a magnetically closed protective layer. This prevents direct contactbetween the material inside the mill and the liner. During mill operation, this protective layer iscontinuously consumed, while the grinding media inside the mill gradually becomes smaller dueto wear and continuously replenishes the protective layer, thereby significantly extending theservice life of the magnetic liner.

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Magnetic Mill Liners

Description

Fundamental of the Metallic Magnetic Liner

Metal magnetic liners are primarily composed of magneticmaterials and a metallic housing used to protect the magnet-ic components.
During installation, the liner is secured to the inner wall ofthe mill through magnetic attraction. During mill operation,with a properly designed magnetic circuit, the liner surfaceforms a dynamic protective layer composed of fine brokenmedia and ferromagnetic minerals. This layer prevents directimpact and wear from grinding media and material on theliner surface, thereby achieving the purpose of extendingservice life.

Advantages of the YT Metal Magnetic Liner

Long service life, 4 - 6 times that of traditionalrubber or steel liners;
Lightweight single plates (total¥weight reduced by at least 30% compared with steliners) and thinner profile;
Easyinstallation, reducing labor intensity for workers;
Safe and environmentally friendly;
Low grinding media consumption;
No slurry leakage;

Compared with traditional liners, magnetic linersdo not require bolt fastening during installation,which not only reduces bolt-related costs but alsoprevents slurry leakage inside the mill. Whileensuring a clean and tidy on-site environment,this design also avoids slurry circulation betweenthe mill and the liner caused by loose bolt holes,thereby protecting the inner wall of the mill.

During mill operation, the collisionbetween the material, grinding media, and theliner protective layer is a rigid-body met-al-to-metal impact. As a result, grinding efficiencyis also improved to a certain extent comparedwith rubber liners.

Properties of the Metallic Magnetic Liner

Simulation data based on real operating conditionsshows that the dynamic protective layer can reducethe impact force between the material and the linerby more than 75%.

A well-designed magnetic field and optimized metalmaterial composition ensure the closure of the mag-netic induction circuit. The surface of the protectivelayer is free of residual magnetism, preventing thematerial from being magnetized and forming mag-netic agglomeration.

The Comparison of Physical Property of the New Magnetic Liner Used In Non-ferrous Metal Mines

	CommonMetallic Magnetic Liner	New Magnetic Liner
Initial hardness of metal shell	190-220HB	≥43HRC
Initial hardness of embedded cast ball	≥52HRC	≥52HRC
Relative permeability	≤1.052	≤1.005

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