Bucket teeth of excavator working condition is the myriads of changes, not only different mines, construction siteconditions are different, even in the same mines because of geological conditions, the control object of hardness,and there are great differences. Bucket tooth conditions approximately have six kinds:
1, the mining object high hardness (Platts hardness coefficient =16 18), the material block degree (weight>500 kgaccounted for 30%), the Qing (eating) foundation work, this is the worst condition. As in Lianyungangportconstruction, mining rock are gneissic granite, bucket teeth service life is very short, only 8 - 12 days. The common high manganese steel bucket teeth of each pay the final yield was between 3 - 40000 tons.
2 mining high hardness (f=14 - 18), the material block is a little (a single weight more than 500 kg total <10%),clearfoundation work accounted for the operation time is less than 20%. Such as mining magnetite ore inAnshan iron ore, bucket teeth life 15 days. Common high manganese steel bucket teeth each pay the final yield was 4 - 70000tons.
3 Mining object with high hardness (f=12 - 4), the material block is a little (a single weight more than 500 kgweight,<5%) clear foundation work accounted for the operation time is less than 15%. As the primary iron orein Daye iron ore mining and diorite (r=10 - 34), bucket teeth of the service life of up to 20 - 35 days, common high manganese steel bucket teeth each pay the final yield of 10-14 million tons, the last conditionmetallurgical and mining industry that is can be used to compare the standard condition.
4 mining object low hardness (i=6 - 8), the material block is a little (a single weight more than 500 kg total <5%), clearfoundation work accounted for the operation time is less than 10%. As the mining of marble in Daye iron ore (F=6 - 8), the skarn collapse (r=8 - 10). Common high manganese steel bucket teeth pay per finishedsee 14]9 million tons,service life of bucket tooth between 35 - 45 days.
5 mining object low hardness (such as / =8 - 10), the material block is a little (a single weight more than 300 kgtotal <5%), clean-up work accounted for the operation time is less than 5%. such as mining iron ore in thePanzhihua Steel Vanadium and titanium in Lanjian Iron mine. Service life of bucket tooth for 50 - 65 days,common high manganese steel bucket teeth each pay final yield can reach to 25 - 300000 tons.
6 mining object with very low hardness (really factory =3 - 5), the material block is very small (less than 200kgweight), as in the Yima Mining Bureau, Fuxin, west of Fushun coal mining coal seam, dew days, edge rock,shale,bucket teeth of the service life of 120 - 380 days. The common high manganese steel bucket tooth pay per final yieldcan reach to 80 - 1500000 tons.
