Unit wear consumption of grinding ball in China metal concentrator is usually
higher, especially for iron ore concentrator which can be double higher than
foreign companies. According to some statistics, domestic grinding ball
consumption in 2015 will exceed 2 million tons. Therefore, it can be a huge
energy-saving effect on the national economy to improve the wear consumption.
Here we introduce a test of high chrome cast grinding ball on molybdenum
concentrator application.
Because of that its high hardness (Fe, Cr) 7C3 carbide phase distributed on
the high yield martensitic matrix, high chrome cast grinding ball is
particularly suitable for abrasive wear applications. However, how it performed
under wet grinding conditions? Japan recently reported that the wear rate of the
high-chrome cast grinding ball wet milling of copper ore was 0.4997 g / h, it
shows that although wet milling reduces abrasion resistance, its wear rate is
still much lower.
1. Chemical composition of high chrome cast grinding ball and its casting
process
2. Molybdenum ore mineral composition
The rebelong to andesite type, the target mineral is molybdenite, and
non-target mineral is quartz, feldspar, plagioclase, they are interspersed
symbiotic relationship. In terms of its hardness, the highest hardness of quartz
minerals accounted for 30.5%.
3. Test results comparison between forged ball consumption and high chrome cast grinding ball
consumption
According to the determination, the crushing rate is also very low. During
the test we find that only three ф100 mm balls crack, the break rate is 0.67 ‰,
and ф80, ф60 mm ball breaking was not found. It is certain that high chrome cast
grinding ball has sufficient toughness to prevent the occurrence of balls
breaking. According to preliminary estimates, when change to high chrome cast
grinding ball, 10000 ton of original forged ball can be saved 7000-8000 ton.
