Wear Resistance

Wear resistance is the ability of refractories to resist the friction and wear (grinding, friction, impact, etc.) of hard materials or gases (including solid materials). It can be used to predict the applicability of refractories in wear and scour environment. It is usually expressed by the volume loss or mass loss of the material after grinding conditions and grinding time.
The abrasion resistance of refractory material depends on its mineral composition, the firmness of microstructure and material particle combination, as well as its own density and strength. Therefore, the hardness of aggregate, particle size composition and sintering degree of materials have influence on abrasion resistance of materials. Normal temperature compressive strength is high, air porosity is low, tissue structure is dense and uniform, good sintered materials always have good wear resistance at normal temperature.
The wear resistance of refractories at room temperature can be carried out according to the test method of national standard GB/T 18301 ≤ 2001 (equivalent to ASTM C 704 ≤ 1994). The test principle is that the test surface of the specified shape and size sample is perpendicular to the sandblasting tube, and the wear medium is sprayed onto the sample through the sandblasting tube with compressed air, and the wear volume of the sample is measured. Calculate the amount of wear according to the following formula:
A = (m1-m2) / pb= m/pb
A-wear quantity, cm3;
pb-bulk density of samples, g/cm3;
M1-sample quality before test, g;
M 2 - after the test, the sample quality, g;
The mass loss of m-sample, g.
It is very important to determine the wear resistance of refractories in high temperature practical use, such as the inner wall of circulating fluidized bed boiler, cyclone separator, pulverized coal pipeline and coal injection pipe, preheating precalciner kiln, lime kiln lining, blast furnace upper lining and coke oven. For the detection of high temperature wear resistance of refractories, there is no corresponding testing standard equipment in our country. Professor Jiang Mingxue of Xi'an University of Architectural Science and Technology has developed a high temperature wear resistance test device for patented products. The device can be used to carry out different materials at different temperatures, different erosion angles and different particle size abrasives. Testing of wear under conditions (expressed in terms of mass loss).