When the thickness of the lining plate is worn by two-thirds, or the wear or tear, or the discharge port is increased to be unable to adjust, the lining plate needs to be replaced, and different replacement ranges can be determined according to the wear and rupture conditions:
(1) The rack and the broken cone liner are all replaced at the same time.
(2) Replace only one of the rack or the crushing cone.
(3) Replace only the frame and crush the lower liner of the cone.
(4) Replace only the lower liner of one of the frame or the crushing cone.
(5) Only partial replacement.
When replacing the rack lining, if the old lining is not taken out, it can be cut by gas welding and the inner surface of the rack can be cleaned. The newly cast concrete on the back of the lining is made of cement No. 500-600 and sand, and the ratio is mixed at a weight ratio of 1:3. Before casting, the lining should be polished to make the concrete and it firmly joined.
After the concrete is cast, it must be trimmed so that the ribs on the back of the lining are in close contact with the frame, and the concrete must be fully cured and dried before it can be put into use, otherwise the service life will be affected.
Replace the broken cone liner: When the lower cone liner is installed, use the adjustment ring at the lower part of the cone to maintain a gap of 1.0 to 2.0 mm between the lower liner and the cone. After the top plate mounted on the compression nut should be attached first, and then cast zinc alloy. Before casting, the cone and the lining plate are preheated at 60-80 °C. The gap between the joints of the lining plate should be plugged with asbestos and clay to prevent the zinc alloy from leaking out. After the liner has been poured into the alloy, the compression nut and the locking plate are attached to make it tightly fixed.
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