Sticking ceramic tile on magnetic separator roller based on wear resistant protecting with abrasion resistant ceramic adhesives
Mine magnetic separator roller using aluminum oxide wear resistant ceramic chip as the abrasion protection is a new kind and domestic initiate of wear resistant material application technology.Because of wear resistant and non-magnetic features of abrasion resistant ceramic chip,has the incomparable high performance more than other metal and non-metallic material,alternative austenitic stainless steel,abrasion resistant rubber,wear resistant non-metallic coating etc.Widely used in iron ore preparation equipment,especially on the magnetic separator cylinder,the service life is more than 5 times higher than the abrasion resistant rubber,the cost performance is more than two times higher than the wear resistant rubber.
The key to the abrasion protective technology of mine magnetic separator roller using alumina wear resistant ceramic chip is the choice of adhesives,due to the particularity requirements of working condition,the used adhesive must have the following features
1. Magnetic separation ore dressing can be divided into dry separation and wet separation,the working temperature of dry separation is general at 100 degrees,the highest temperature is not more than 150 degrees,so we required that the adhesive can withstand the 150 degrees high temperature.Wet separation usually works at room temperature,but it requires the adhesive has excellent water resistance.
2. Magnetic separator roller is the stainless steel material,the bonding force of the adhesive is usually relatively poor to the stainless steel,due to the particularity requirements of the working condition,the using adhesives must have very strong bonding force to the stainless steel.General ceramic adhesives on the market often only pay attention to improving the adhesive shear capacity and ignore the impact resistant ability,under the material continuously scouring,the adhesive appears the stress fatigue to cause the ceramic chip falling off,greatly shorten the service life of roller.
Xiangyang City Hundred Shield Coating Material Co.,Ltd devotes itself to the research & development and application of the engineering adhesives over the years,developed BD121 wear resistant ceramic adhesives (details: http://www.realbond.net/naimotaocijiao/2.html),suitable for the sticking of magnetic separator roller abrasion resistant ceramic chip.BD121 wear resistant ceramic adhesive is made from the toughening modified resin and special curing agent and other additives.High temperature resistance,good toughness,room temperature curing,the viscosity is moderate,in the process of the ceiling and facade construction,not flowing,doesn't fall off.(note: the temperature of construction in winter is low,should heat it up for curing)
Construction:
At first,do the polishing,sand blasting and roughening treatment on the magnetic separator roller,to improve the bonding force.
Then wipe the bonding surface with solvent such as acetone or ethyl acetate etc,and dry it by airing for about 10 minutes,make the bonding surface be dry and clean.
According to the specified ratio(A:B (mass ratio)=4:1),make the two components of the adhesives mix uniformly,then smear it on the bonding surface,on the premise of ensuring no shortage of adhesives,the coatings are the thinner the better,had better smear the double-sided adhesives.Make the ceramic chip after smearing the adhesives be folded and compacted with barrel.
It can be production after the adhesive curing for 24 hours,If you can heat it up to the temperature of 60‘ζ and keep this temperature for 2 hours,then do the post curing,can get the higher comprehensive performance (can improve 30%).Every time the quantity of configuring adhesive should not be too much,and the mixed-up adhesive should be used up before the coating time limit,in order to avoid causing waste.
Through many mines using examination,without appearing the phenomenon of ceramic chip falling off.
