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test-piece placed at a right angle to a nozzle through which 1000 grams of size-graded silicon carbide is blasted by air at 450 kPa, for the duration of 450 seconds.


where


A = the amount of loss of material, in cubic centimetres; m1


m = the mass loss of the test piece, in grams;


ρ = the bulk density of the test piece, in grams per cubic centimetre.


As example, from these test the following results have been obtained for a number of extreme erosion resistant refractory materials [acc. to ASTM C-704, fired at 815°C], a.o.:


Actchem 85


Cyclone Mix Super Actchem 75 Curas 90 PF


Resco AA22(S) Actchem 45 TF Pliflow Erozist


ex. Dramicom


ex. Plibrico/Calderys ex. Dramicom


ex. Gouda Refractories ex. Resco products ex. Dramicom


ex. Plibrico/Calderys ≤ 3


2.5 – 3.5 3 – 3.5 3 – 4 3 – 4


3.5 – 6 5.5 – 7.5


cc; cc; cc; cc; cc; cc; cc.


Part 2 of this paper will appear in The Refractories Engineer May 2019.


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ENGINEER THE REFRACTORIES 23


REFRACTORY RECLAMATION AND


= the mass of the test piece before testing, in grams; m2 = the mass of the test piece after testing, in grams;


RECYCLING


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