ed hardy bikinit -377m bulk feeder chamber Failure

Shengdanjiui

-377m bulk feeder chamber Failure Analysis and Countermeasure

Figure 3. Because the bottom has a certain rigidity, determines the two sets of spring-mass system is not independent of each other, their movement is constrained to each other; because the bottom has a plastic, two sets of parallel spring mass system can not be considered. Now divided into 2 kinds of situations to discuss the mechanical state of the movement of feeder: (1) smooth the upper blanking ore bin, feeder loaded uniformly, that is M = m,ed hardy bikinit, the two sets of spring-mass system vibration frequency, phase, amplitude, phase Dong Tai Yuen, Phoenix Copper, engineers, 244 041, Tongling, Anhui Phoenix Mountain. Dong Da-Yuan: a 377m bulk feeder chamber Failure Analysis and Countermeasure F 2003 10 Figure 3 feeder spring mass system with the mechanical model. Feeder direction of the exciting force by the office of a particle and its direction of movement is always parallel to the side of the vertical plane, not perpendicular to the vertical plane of the force, the exciting force Fsinwt only maintained in the vertical feeder plane vibration. (2) feeder loaded unevenly, M>, the amplitude, according to the formula we can see two sets of spring-mass system vibration frequency, the same phase and the amplitude of different feeder trajectory in a cone, and its dynamic map shown in Figure 4. The difference between M and the greater the difference between the amplitude of the larger cone angle of the cone is larger, in the same phase, the exciting force Fsinwt along the vertical plane of the force parallel to the smaller FsinwtcosO along the perpendicular to the vertical contribute to the greater FsincotcosO straight plane. The former provides an effective exciting force spring mass system; the latter along the width of the feeder to the force, with different phases, the size of the force, direction changes periodically, is a cyclic loading, the greater the amplitude, destructive stronger. 3 The analysis shows that corrective measures: internal cracking body vibration motor is two (on the next page 42) Figure 4M> hour feeder motion lateral arrangement of the mechanical model, external cause is non-uniform feeder loaded. Material directly from the ore bin mine stope, the middle has not been broken, difficult to control the ore block size, feeder loaded non-uniform can not be avoided. Therefore, we chose to change the vibration motor layout program. (1) welding ribs, triangular support, appropriate increase in the end, side to enhance the thickness of the feeder body stiffness. (2) a high-power vibration motor installed in the lower bottom feeder (the feeder along the width direction is in the middle of the vertical dotted line position as shown in Figure 1) instead of the original form of bilateral arrangement, so that the feeder into a multi-spring The spring mass system in parallel. (3) increasing appropriate feeder and associated moving parts of other devices, with the gap between facilities in order to prevent the loading of non-uniform feeder is tilted in motion interference. After the rectification, the feeder has not run since 1997 and large cracks appeared deformation of body, life to achieve design goals, the fact that the reform measures based on theoretical analysis is correct. (Received 2003-08-20) Figure 4 pre-optimized bacterial oxidation process, and to the gold particles exposure.(3) bacterial oxidation pretreatment process of arsenopyrite oxidation follow a direct impact on carbon leaching rate of gold leaching stage, the more complete oxidation of arsenopyrite, the higher the rate of gold leaching. (4) gold Chongyang pretreatment conditions of bacterial oxidation test, get the gold oxidation pretreatment optimization process: oxidation of sulfur concentrate 4d, C Concentrate 2d, tailings oxidation of 1d. This process not only solves the carbon flotation concentrate and tailings from the recovery of gold in the issue, but also reduces the amount of ore pretreatment bacterial oxidation. References 1FraserKS, WaltonH. WellsJA, ProcessingofRefractoryGoldOre. MineralsEngineering, 1991.4:102910412 hair in the sand. Li Ximing. Luan United Lang, et al. Microbial pretreatment process of removing arsenic arsenic smelting of gold of gold. Chemical Metallurgy, 1996,7.20 o ~ 2043 Min Guo Wei, Luo Zhongxing. On the gold extraction process refractory gold ores. Mining Engineering, 1996,16:49 ~ 534 Wei to and. Chung Kang years, and so on. Chongyang microbial oxidation of refractory gold (semi-continuous experiment). Metallic Ore Dressing Abroad, 1996 (3): 21 ~ 255 rock and mineral analysis of studies. Rock and mineral analysis,abercrombie outlet, the first volumes (third edition). Beijing: Geological Publishing House, 19916 Beijing General Research Institute of Mining and Metallurgy Office ed. Non-ferrous metal ores and Analysis Handbook. Beijing: Metallurgical Industry Press,oakley brasil, 1990 (Received 2003-06-12) * 49 *

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