Slurry pump repair special chemical wear abrasion resistant protective epoxy coating
Mine slurry pump repair and wear resistant protective process:
Do the sand blasting treatment on the surface of the guard plate,and clean it with alcohol,acetone,ethyl acetate or
special cleaning agent,the substrate surface after this treatment should be rough,clean and dry.
install the fixed forming mould along the guard plate around,its effect is that prevent wear resistant materials from
overflowing and make the formed surface put in order for easy to install directly.The mould should have certain strength,
it’s not easy to change shapes,the surface of contacting with abrasion resistant material should pass the treatment,
it’s not easy to be bonding by wear resistant material,it’s easy to mold release. (the common methods are: Smear a layer of
mould release agent or engine oil on the contacting surface,paste the adhesive tape paper and newspaper etc.).
3.Using the undercoat:
According to the specified ratio,weigh the weight of the undercoat A and B component,and then mix them uniformly,
then make it brush coating on the pending-repair part uniformly with hair brush.
Configure the material: according to the specified ratio from the packaging or instructions,weigh the weight of the A and B
component exactly and mix them uniformly.Every time the most quantity of configuring adhesives is not more than 2Kg,
too much adhesives are not easy to mix uniformly,moreover the usage period of some abrasive material is short after mixing well,
configure too much adhesives,has not been used up until the adhesive has already cured,result in the waste.
The tools of weighing the A and B component and mixed abrasive material must be separated during configuring adhesives,
in order to avoid appearing the cross contamination for the pending-using adhesives.
Make the mixed-up adhesives press and smear on the maintenance parts.The smearing effect is the best after the undercoat initial curing,
the coatings should be compacted,flat and smooth.When repairing sheath, inside the sheath of horizontal circle above the horizontal
and slightly inclined to repair a week, after being wear-resisting material curing flip the other side to install the mould and at the other
side of the sheath in the circle above the horizontal and slightly inclined to repair a week, after waiting for curing the sheath placed in
a vertical position in the lower approximation level repair period, after initial curing is not flowing, rotating sheath will be next to just
repair parts for a period of repair on the horizontal plane unattended.Then according to this method,turn the sheath in turn,
then repair the pending-repairing parts by subsection until to finish repairing.We must pay attention to that the new repairing segment
should be compacted to the previous segment,each section must be compacted to the original repairing two annule,
make it without obvious interface.
BD7041 super wear resistant coatings can be complete curing for 24 hours at room temperature.BD7011 super abrasion resistant coating
need heating for curing,each paragraph material of finishing smearing should keep the new repairing parts in a horizontal position during
construction,place it in the 80-120 degree temperature drying oven,keep this temperature for 2 to 3 hours for curing.The new smearing
parts must keep in a horizontal position,in order to avoid the material sliding deformation in the process of heating.
Go through the finishing curing workpiece carefully,we should configure the adhesives to repair the defective parts again.
6 Repairing the out of tolerance part:
The part of the out of tolerance influencing the installation should be polished to be the suitable size by angle grinder carefully.
Add water to polish on the polishing parts in the process of polishing,in order to avoid reducing even damaging the abrasion
resistance of the polishing parts based on too high polishing temperature.
7:Using the topcoat:
According to the specified ratio,weigh the weight of the topcoat A and B component,then mix them uniformly,
make it brush coating or blade coating on the surface of repairing parts,finish the process of maintenance after the topcoat curing.