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Production technology
The constant chemical analysis of the raw material, a fully automatized tempering process with a quality control system which is orientated on the Europe nom DIN-ISO 9002, makes it possible, to produce optimized forged steel grinding balls.In comparison tests with other grinding medias like cylpebs, boulpebs or high chromium cast balls it could be proofed, that in the total cost-calculation of the mill process, the forged steel grinding balls achieve a considerably better result.
L & N forged steel grinding balls were produced with the following average chemical composition:
Carbon |
0.40-1.00 % |
Manganese |
0.40 - 1.50 % |
Silicium |
0.15 - 0.60 % |
Chromium |
max. 1.80 % |
Copper |
max. 0.20 % |
Molybdenum |
max. 0.10 % |
Nickel |
max. 0.50 % |
Sulphur |
max. 0.03 % |
Phosphorus |
max. 0.03 % |
Due to the automatized tempering technology for our forged steel grinding balls, we achieve an optimal wear resistance with maximum breakage resistance. Based on a high resistant martensite structure from the heat treatment process, the balls have an extreme high wear resistance for the roll-grinding and also for the cataract process in the mill.
L & N forged steel grinding balls have a volumetric hardness of 59-65 HRC (650-780 brinell). The second positive effect due to the constant tempering process is the roundness of the grinding ball during its lifetime in the grinding process. This constant spherical form guarantees an opimal energy result in the grinding process.
