views:
1, the ball mill protective cover is not hurt. Since the construction unit is not constructed according to the technical requirements, the in-hole door of the protective cover does not have a door cover, resulting in dust into the gear in the protective cover. In particular, there is no seal in the midst of the ball mill air mandrel and the protective cover, which has no seal, so that the fly ash in the big dethium is intensified. The boiler's preheater is 3 bidding, all the way is the secondary wind of the blower, and the other is the hot air of the fan. Since the wind pressure is too high, the preheater is carried from the flue gas side. Gray (breeze-bead Al2O3 containing high hardness) blows away, while many of the pipe welds in the hot air system are unqualified, causing severe leakage. The vented dust enters the gear wear in the gear shield.
2, each ball mill is equipped with an automatic fuel injection device produced by US Lin-Coln, including pneumatic pump, lubricant, multi-level nozzle, 4 along the large tooth wheel width. The nozzle, the trial operation is set once every 2 min fuel injection, the fuel injection time 2 s, each nozzle is approximately 1.3 g. Because the teeth of the ball mill are tumored, it is not easy to reserve oil on the tooth surface, so the injection time is more frequent. After putting into production, it was changed to 15 min fueling once, and then the phenomenon of gentle gear tooth surface was worn, gum, phenomenon and other phenomena, and change the injection interval to 8 minutes. In the early stage of production of the 5th, it was found that the upper cover of the fuel injection device was placed in the ball mill, while the lower oil bucket did not know. Although the fuel injection device is still working, it is not oil but also air, which has also exacerbates the pixment of the gear.3, according to the regulations, the temperature difference of the two ends along the small tooth wheel width is not more than 8 ° C; the high temperature of the tooth surface is not higher than 100 ° C; the gap of each part can be measured normally Enter (small tooth wheel bearing housing and table board) position lock. When the temperature difference is greater than 8 ° C, the temperature of the low temperature is appropriately raised. Due to the large amount of workload, the A, B, C, D, E ball mills at No. 5 furnace E ball mills and No. 6 furnace have not been entered into the positioning pin, which is a reason for the wear of tooth surface. It is also a reason why the individual small tooth velocity is high and the temperature difference between the two ends is relatively large.
