Wear of periclase-spinellide refractories in the suction nozzle of a batch vacuum degasser

Refractories ◽  
1988 ◽  
Vol 29 (11-12) ◽  
pp. 754-759
Author(s):  
S. G. Sennikov ◽  
E. A. Simun ◽  
I. K. Orlov ◽  
A. N. Sokolov
Keyword(s):  
Vacuum Degasser ◽  
Suction Nozzle ◽  
Batch Vacuum

Reasons for unsatisfactory refractory service in the zone of the metal of a batch vacuum degasser

Refractories ◽  
1989 ◽  
Vol 30 (5-6) ◽  
pp. 389-391
Author(s):  
V. G. Kukareko ◽  
A. I. Ustinov ◽  
M. A. Burtsev ◽  
A. V. Lugovskikh ◽  
O. V. Ladariya ◽  
...  
Keyword(s):  
Vacuum Degasser ◽  
Batch Vacuum

Improvement of Vacuum Degasser Cover

2019 ◽  
Author(s):  
A. Yoshitsune ◽  
K. Setoguchi ◽  
M. Yoshizawa ◽  
K. Sumida
Keyword(s):  
Vacuum Degasser

Multi-criteria optimization of the four-finger gripper mechanism

2020 ◽  
Vol 8 (4) ◽  
pp. 276-286
Author(s):  
Vu Duc Quyen ◽  
Andrey Ronzhin
Keyword(s):  
Multicriteria Optimization ◽  
Kinematic Model ◽  
Objective Functions ◽  
Nsga Ii ◽  
Suction Nozzle

Three posterior algorithms NSGA-II, MOGWO and MOPSO to solve the problem of multicriteria optimization of the robotic gripper design are considered. The description of the kinematic model of the developed prototype of the four-fingered gripper for picking tomatoes, its limitations and objective functions used in the optimization of the design are given. The main advantage of the developed prototype is the use of one actuator for the control of the fingers and the suction nozzle. The results of optimization of the kinematic model and the dimensions of the elements of robotic gripper using the considered posterior algorithms are presented.

Water Modeling on Circulating Flow and Mixing Time in a Ruhrstahl–Heraeus Vacuum Degasser

2021 ◽  
pp. 2000608
Author(s):  
Chang Liu ◽  
Lifeng Zhang ◽  
Fei Li ◽  
Kaiyu Peng ◽  
Fenggang Liu ◽  
...  
Keyword(s):  
Mixing Time ◽  
Water Modeling ◽  
Vacuum Degasser

Composition of Ladle Slag and Refractory Materials and Its Effect on the Wear Resistance of the Lining of an RH Vacuum Degasser

2005 ◽  
Vol 46 (3) ◽  
pp. 193-196 ◽  
Author(s):  
V. A. Rovnushkin ◽  
E. A. Visloguzova ◽  
S. A. Spirin ◽  
E. V. Shekhovtsov ◽  
V. V. Kromm ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Refractory Materials ◽  
Ladle Slag ◽  
Vacuum Degasser

scholarly journals Numerical Simulation of the Behavior of Hydrogen Source in a Novel Welding Process to Reduce Diffusible Hydrogen

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1619 ◽  
Author(s):  
Shinichi Tashiro ◽  
Naoki Mukai ◽  
Yoshihide Inoue ◽  
Anthony B. Murphy ◽  
Tetsuo Suga ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Arc Welding ◽  
Gas Flow ◽  
Operating Conditions ◽  
Shielding Gas ◽  
Diffusible Hydrogen ◽  
Welding Torch ◽  
Deposited Metal ◽  
Suction Nozzle ◽  
Gas Nozzle

This study aims to reduce the diffusible hydrogen content in deposited metal during gas metal arc welding (GMAW) and flux-cored arc welding (FCAW) which induces cold cracking. To achieve this, a novel welding torch with a dual gas nozzle has been developed. This special welding torch decreases the hydrogen source gas evaporated from a welding wire by the suction from the inner gas nozzle. In order to improve the suction efficiency of this evaporated gas, precise control of the suction gas flow is indispensable. In this paper, a simplified numerical simulation model of this process has been described. This model can take account of the evaporation of the hydrogen source gas from the wire while simulating the behavior of the shielding gas and the arc. Using this model, the effect of suction nozzle structure and torch operating conditions on suction gas flow pattern and suction efficiency was also investigated to understand the process mechanism. Furthermore, the diffusible hydrogen content in deposited metal was measured by chromatography as a validation step. Results show that some of the shielding gas introduced from a shielding nozzle was drawn inward and also branched into an upward flow that was sucked into the suction nozzle and a downward flow to a base metal. This branching height was defined as the suction limit height, which decisively governed the suction efficiency. As a result, in order to reduce the diffusible hydrogen, it was suggested that the suction limit height should be controlled towards below the wire position, where the evaporation rate of the hydrogen source gas peaks through optimization of the suction nozzle design and the torch operating conditions.

scholarly journals Pharmacokinetic Study and Optimal Formulation of New Anti-Parkinson Natural Compound Schisantherin A

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Fei Sa ◽  
Bao Jian Guo ◽  
Sai Li ◽  
Zai Jun Zhang ◽  
Hok Man Chan ◽  
...  
Keyword(s):  
Pharmacokinetic Profile ◽  
Absolute Bioavailability ◽  
Drug Candidate ◽  
Vacuum Degasser ◽  
Ultraviolet Detector ◽  
Novel Approach ◽  
Cns Drugs ◽  
Oral Therapeutic ◽  
Shed Light ◽  
Schisantherin A

Our recent studies showed that schisantherin A (StA) is a promising candidate for PD treatment, but the pharmacokinetic profile of StA is largely unknown. The effects of different formulations on the pharmacokinetics and bioavailability of StA were investigated by HPLC equipped with a vacuum degasser, a quaternary pump, a manual sampler, and an ultraviolet detector. The absolute bioavailability of StA in nanoemulsion formulation was significantly increased from 4.3% to 47.3%. To the best of our knowledge, this is the first report of absolute bioavailability for StA in rats and successful increase of bioavailability of StA by nanoemulsion formulation. The pharmacokinetic profiles of StA could be significantly improved by a safe nanoemulsion formulation. This study provides a successful example of advanced delivery system for improving the bioavailability of potential central nervous system (CNS) drug candidate with poor solubility. This novel approach could be an effective alternative solution to overcome the shortcomings of conventional poor drug delivery of CNS drugs. The results of present study not only indicate that StA has potential to be developed as a promising oral therapeutic agent for the management of PD but also shed light on novel way to improve bioavailability of PD drugs.

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