Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: April 2014
Authors: Roland Haubner, Susanne Strobl
From metallographic investigations and RFA data a classification of the slag into three types (Type E1, E2, E3) is possible.
The high amount of wuestite in the slag is supposed to be a result of an interrupted reduction process.
The iron reduction process is nearly finished.
K2O was introduced by charcoal which is used as reduction and heating source.
The high amount of wuestite in the slag is supposed to be a result of an interrupted reduction process.
The iron reduction process is nearly finished.
K2O was introduced by charcoal which is used as reduction and heating source.
Online since: June 2008
Authors: Hiroomi Ogasawara, Noritsugu Maeda, Teru Hayashi
Moreover, in case of the tooth profile
measurement on the horizontal cross-section plane, which is the top priority measurement item in this
system, further reduction of the error factors can be achieved by fixing the test gear spindle that can be
positioned in the vertical axis and defining point P as the origin of the coordinate system.
Therefore, error factors that may affect measurement data, such as thermal deformation and stress-caused deformation are not transmitted to each other.
A reduction unit consisting of precision gears is mounted in the middle of the main spindle mechanism.
An internal spur gear is used as the final step of the reduction unit of this angle indexing mechanism and this internal gear is concentrically connected to the main spindle.
Therefore, error factors that may affect measurement data, such as thermal deformation and stress-caused deformation are not transmitted to each other.
A reduction unit consisting of precision gears is mounted in the middle of the main spindle mechanism.
An internal spur gear is used as the final step of the reduction unit of this angle indexing mechanism and this internal gear is concentrically connected to the main spindle.
Online since: April 2008
Authors: Yong Jun Zhang, Li Yong Ni, Suo Qing Yu, Zhu Bai Liu
The disorganized tissue benefits the
elevation of transversal properties and the reduction of anisotropy and the reasonable distribution of
mechanical properties.
In difficult-to-deform zone, there is almost no the zone of the kind from the angle of the whole reduction, contributing the overall improvement of the forgings tissue.
The reduction ratios were 20%.
Data statistics showed different effects of two forging methods.
In difficult-to-deform zone, there is almost no the zone of the kind from the angle of the whole reduction, contributing the overall improvement of the forgings tissue.
The reduction ratios were 20%.
Data statistics showed different effects of two forging methods.
Online since: October 2010
Authors: Hong Li Zhang, Wei Feng Lang
(11)
Experiments
One of the TUAG merits is reduction of grinding force.
In Fig.3b), when the feed speed of workpiece is low, the ultrasonic vibration leads to a great reduction of normal grinding force.
workpiece Ultrasonic vibration fitting Workpiece clamping Grinding wheel Worktable Principal axis Computer Oscillograph Ultrasonic vibration clamping Ultrasonic generator Kistler dynamometry Charge amplifier Data collector Table 2 Design on the grinding experiment scheme for CG Grinding method CG, dry grinding Grinding wheel 140#stee, Metal bonded CBN grinding wheel, Density 100%, ø50[mm] Workpiece material 45# steel 20[mm]×15[mm]×5[mm] Grinding wheel velocity, vs vs=10.5[m/s] Grinding deep, ap ap=15[µm] Workpiece feed speed, vw vw=100, 350, 700, 1000, 1500, 1700, 2000[mm/min] 0 15 30 45 60 200 600 1000 1400 1800 Workpiece speed,vw (mm/min) CG TUAG Critical speed, vl Tangential grinding force, Ft(N/mm) 0 25 50 75 100 200 600 1000 1400 1800 (mm/min) Normal grinding force, Fn (N/mm) CG TUAG Critical speed, vl Workpiece speed, vw a) Influence of wv on tF b) Influence
Edge-chipping reduction in rotary ultrasonic machining of ceramics: Finite element analysis and experimental verification.
In Fig.3b), when the feed speed of workpiece is low, the ultrasonic vibration leads to a great reduction of normal grinding force.
workpiece Ultrasonic vibration fitting Workpiece clamping Grinding wheel Worktable Principal axis Computer Oscillograph Ultrasonic vibration clamping Ultrasonic generator Kistler dynamometry Charge amplifier Data collector Table 2 Design on the grinding experiment scheme for CG Grinding method CG, dry grinding Grinding wheel 140#stee, Metal bonded CBN grinding wheel, Density 100%, ø50[mm] Workpiece material 45# steel 20[mm]×15[mm]×5[mm] Grinding wheel velocity, vs vs=10.5[m/s] Grinding deep, ap ap=15[µm] Workpiece feed speed, vw vw=100, 350, 700, 1000, 1500, 1700, 2000[mm/min] 0 15 30 45 60 200 600 1000 1400 1800 Workpiece speed,vw (mm/min) CG TUAG Critical speed, vl Tangential grinding force, Ft(N/mm) 0 25 50 75 100 200 600 1000 1400 1800 (mm/min) Normal grinding force, Fn (N/mm) CG TUAG Critical speed, vl Workpiece speed, vw a) Influence of wv on tF b) Influence
Edge-chipping reduction in rotary ultrasonic machining of ceramics: Finite element analysis and experimental verification.
Online since: July 2014
Authors: Bin Wu, Jorge Abad
· Achieved an actual annual energy saving of $7 million, which is equivalent to approximately a saving of 109 million kWh of electricity, and a reduction of CO2 emission of 201,250,000 pounds annually.
After analyzing the data gathered, 9 recommendations were made that could result in cost savings of $132,000.
This simple measure can create a large reduction in the amount of energy used by the lighting system.
“The Complete Cycle to Achieve Industrial Energy Efficiency – Concept, Resources, and Application”, Proceedings of International Academic Conference, HI13-347, Maui, Dec 2012 [2] Wu, B., Promoting Awareness of Industrial Energy Efficiency and Waste Reduction in the University Students Population, Annual Conf. of American Society for Engineering Education, Hawaii, July 2007
After analyzing the data gathered, 9 recommendations were made that could result in cost savings of $132,000.
This simple measure can create a large reduction in the amount of energy used by the lighting system.
“The Complete Cycle to Achieve Industrial Energy Efficiency – Concept, Resources, and Application”, Proceedings of International Academic Conference, HI13-347, Maui, Dec 2012 [2] Wu, B., Promoting Awareness of Industrial Energy Efficiency and Waste Reduction in the University Students Population, Annual Conf. of American Society for Engineering Education, Hawaii, July 2007
Online since: October 2014
Authors: Rastislav Ingeli, Miroslav Čekon, Eva Jankovichová, Minh Nguyen Tien
Tools and measures to accelerate the improvement of the energy performance of buildings and their implementation into the buildings with almost zero energy so that the supply of energy from renewable sources in the building or close by 2020, to achieve at least a 50 % reduction in primary energy.
Balance between the material cost, technical equipment and the overall reduction of the progressive energy performance are the one of looking for optimal solutions.
This solution is applied to a specific site of a residential building, where there was a real wind intensity measured on the basis of monitoring data for the last 3 years by Slovak Hydrometeorological Institute (SHMÚ).
Finally, this study represents app. 8.8 years payback period (there is 32 wind turbine), whereas with any support it might have even more significant reduction from customer’s point of view and finally have potential to meet requirements of recently given targets of European energetic strategy.
Balance between the material cost, technical equipment and the overall reduction of the progressive energy performance are the one of looking for optimal solutions.
This solution is applied to a specific site of a residential building, where there was a real wind intensity measured on the basis of monitoring data for the last 3 years by Slovak Hydrometeorological Institute (SHMÚ).
Finally, this study represents app. 8.8 years payback period (there is 32 wind turbine), whereas with any support it might have even more significant reduction from customer’s point of view and finally have potential to meet requirements of recently given targets of European energetic strategy.
Online since: September 2014
Authors: Zakaria Man, Mohammad Azmi Bustam, Ariyanti Sarwono, Khairun Azizi Azizli
These observations are in line with the literature data [12].
The reduction in urea release shown in Figure 4 was obvious.
The reduction on reswelling capability was observed; however, the films still show good reswelling capability.
The hydrophobicity of lignin leads to reduction of entrapped urea release from the film in soil.
The reduction in urea release shown in Figure 4 was obvious.
The reduction on reswelling capability was observed; however, the films still show good reswelling capability.
The hydrophobicity of lignin leads to reduction of entrapped urea release from the film in soil.
A Practical Solution for Reducing Critical Height in Drain Sink Problem during Ladle Teeming Process
Online since: October 2015
Authors: Leandro S. Oliveira, Raniro Coelho, Roberto Schor, Vítor P. Monken
As the steel is drained, at a certain height from the bottom of the ladle, a draining funnel is formedand, when it reaches a critical height,due to the reduction in thedifferential static pressure between the slag-molten steel interface and the nozzle entrance, the slag starts to be carried down along with the steel to the tundish, producing exogenous inclusions in the final product.
The obtained data showed a deviation of less than 5%.
The time step of 0.01 seconds was selected since further reduction did not affect the solution accuracy (FIG. 3).
Conclusion An innovative device, comprised of an air-suctioning spear placed above the slag layer in a molten steel ladle, was proposedfor the reduction of the critical draining height in the steel ladle teeming process.
The obtained data showed a deviation of less than 5%.
The time step of 0.01 seconds was selected since further reduction did not affect the solution accuracy (FIG. 3).
Conclusion An innovative device, comprised of an air-suctioning spear placed above the slag layer in a molten steel ladle, was proposedfor the reduction of the critical draining height in the steel ladle teeming process.
Online since: August 2013
Authors: Ž. Domazet, F. Lukša
Figure1 Roll design and groove distribution
Table 1 Pass schedule &experimentally determined rolling forces
Pass No.
1
2
3
4
5
6
7
8
Pass shape
box
box
box
box
box
oval
square
oval
Groove dimensions [mm]
100x82
100x66
67x80
67x59
66x52
80x34
40
58x20
Cross-section [mm2]
9850
8015
6474
5398
4032
3280
2286
1578
1075
Width [mm]
100
104
108
71
76
65
82,5
53,5
60,5
Initial height [mm]
100,0
82,0
108,0
80,0
76,0
52,0
82,5
40,0
Height after pass [mm]
82,0
66,0
80,0
59,0
52,0
34,0
51,0
20,5
Absolute draught [mm]
18,0
16,0
28,0
21,0
24,0
18,0
31,5
19,5
Absolute reduction [mm2]
1835
1541
1076
1366
752
994
708
503
Elongation coefficient
1,23
1,24
1,20
1,34
1,23
1,43
1,45
1,47
Working diameter [mm]
372,5
393,5
372,5
398,5
396,5
419,5
397,25
433
Length [m]
3
3,69
4,56
5,47
7,33
9,01
12,93
18,73
27,49
Projected length of arc of contact [mm]
57,84
56,10
72,08
64,68
68,97
61,44
79,10
64,97
Projected area of contact [mm2]
5900
5947
4938
4754
4276
4531
3461
3265
Rolling time [s]
1,58
1,74
2,26
Fig.5shows experimentally obtained diagram of A.A.Dinnik [4],deformation resistance of low carbon steel St3 for the reduction size 30% and different deformation speed.
For another reduction on the same diagram correction factor ais used.
Based on this data it is obvious that the rolling forces increment is about 15% for lowering initial rolling temperature from 1200°C to 1150°C and about 30% for lowering initial rolling temperature from 1200°C to 1100°C.
Fig.5shows experimentally obtained diagram of A.A.Dinnik [4],deformation resistance of low carbon steel St3 for the reduction size 30% and different deformation speed.
For another reduction on the same diagram correction factor ais used.
Based on this data it is obvious that the rolling forces increment is about 15% for lowering initial rolling temperature from 1200°C to 1150°C and about 30% for lowering initial rolling temperature from 1200°C to 1100°C.
Online since: October 2013
Authors: Mario Tello, Carolina Hernández, Alex González, Paulina Pradel, Maria Paz Villarroel, Gino Corsini
However, molecular analyzes failed to detect the presence of this gene in the S. equorum LMA-2 (data not shown).
Campos-Garcia, Reduction and efflux of chromate by bacteria.
Hasnain, Reduction of toxic hexavalent chromium by Ochrobactrum intermedium strain SDCr-5 stimulated by heavy metals, Bioresour.
Patel, Hexavalent Chromium Reduction by Staphylococcus Sp.
Campos-Garcia, Reduction and efflux of chromate by bacteria.
Hasnain, Reduction of toxic hexavalent chromium by Ochrobactrum intermedium strain SDCr-5 stimulated by heavy metals, Bioresour.
Patel, Hexavalent Chromium Reduction by Staphylococcus Sp.