Experimental study and mechanism analysis on bioeffects by nanosecond electromagnetic pulses

1997 ◽  
Vol 40 (3) ◽  
pp. 301-304 ◽  
Author(s):  
Baoyi Wang ◽  
Jiebin Yang ◽  
Qinggong Guo ◽  
Runmin Xu ◽  
Changjun Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Mechanism Analysis ◽  
Electromagnetic Pulses ◽  
Nanosecond Electromagnetic Pulses

Experimental Study on Fault Caused by Partial Arc Steam Forces and Its Economic Solution

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
Daren Yu ◽  
Yanfeng Duan ◽  
Jinfu Liu ◽  
Zhansheng Liu ◽  
Qinghua Hu
Keyword(s):  
Experimental Study ◽  
Temperature Rise ◽  
Mechanism Analysis ◽  
Steam Turbines ◽  
Practical Test ◽  
Full Load ◽  
Control Stage ◽  
Fault Mechanism ◽  
Fault Characteristic

It is noticed in a few steam turbines that there are a pad temperature rise of more than 10°C and a radial journal movement of more than 50 μm in the bearings adjacent to control stage when they operate under partial arc admission at 60–80% of their full load. It is found through fault mechanism analysis and experimental study that the fault is caused by partial arc steam forces acting on control stage. A fault characteristic is concluded to help identify this fault. Diagonal admission is therefore proposed as an economic solution for elimination of this fault and it is proved to be effective through practical test.

The Experimental Study and Mechanism Analysis on Flotation Separation of Tetradymite and Pyrite

2015 ◽  
Vol 1092-1093 ◽  
pp. 1490-1496
Author(s):  
Hai Liang Feng ◽  
Xiao Kui Che ◽  
Qi Zheng ◽  
Li Cheng Ma
Keyword(s):  
Experimental Study ◽  
Chemical Adsorption ◽  
Mechanism Analysis ◽  
Butyl Xanthate ◽  
Mineral Flotation ◽  
Ftir Spectral Analysis ◽  
The Common ◽  
The Difference ◽  
Adsorption Quantity ◽  
Dithiocarbamate Group

The experimental results of flotation of pure tetradymite and pyrite show that HL-1 is an efficient collector for tetradymite flotation. Comparing to the butyl xanthate, HL-1 has stronger collector ability and higher selectivity. It solves the common problem of the separation of tetradymite and pyrite. The difference of adsorption quantity is consistent with results of the single mineral flotation test. Through the measurements of adsorption, zeta-potential, and FTIR spectral analysis, the flotation mechanism of tetradymite with HL-1 has been discussed. It is concluded that the adsorption of HL-1 on tetradymite surface is chemical adsorption through the dithiocarbamate group of the collector chelating the Bi (III) of tetradymite to form metal complex.

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