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Degassing of magnesium alloy by rotating impeller

2018-6-15  Abstract. A mathematical model was used to simulate the removal of hydrogen from magnesium alloy by a rotary impeller. It has been shown that the degassing efficiency is mainly dependent on the total surface area of the inert gas bubbles that is related to the rotation speed and the gas flowrate as well as the design of the impeller.

Rotary degassing GIESSEREILEXIKON.COM

Rotary degassing or impeller degassing is mainly used for the purification and hydrogen degassing of aluminum melts (see Hydrogen solubility). The device is placed on the crucible or treatment container or, if it is designed as a free-standing device, the rotor goes into the ladle below it (impeller station).

Effects of rotating impeller degassing on microstructure

[en] The rotating impeller degassing technique was used for degassing of A356 scrap melt which had been protected and purified with an RE-containing JDN-I flux. Results indicated that the modification of eutectic silicon was faded and the mechanical properties of the alloy became worse after rotating impeller degassing and that the tensile strength and elongation of the scrap A356 alloy which

Research on water simulation experiment of the rotating

2009-1-15  Chemical and physical methods can be used in the degassing process, and the rotating impeller degassing (RID) process is one of the most popular and effective techniques at present . Because of the non-transparency of the liquid Al alloy, it is difficult to observe the shape and motion state of the gas bubbles in the liquid Al alloy directly.

Effects of rotating impeller degassing on microstructure

The rotating impeller degassing technique was used for degassing of A356 scrap melt which had been protected and purified with an RE-containing JDN-I flux. Results indicated that the modification

Effects of rotating impeller degassing on microstructure

The rotating impeller degassing technique was used for degassing of A356 scrap melt which had been protected and purified with an RE-containing JDN-I flux. Results indicated that the modification of eutectic silicon was faded and the mechanical properties of

(PDF) Physical Modelling of an Aluminium Degassing

A hydrodynamic study of aluminum degassing by the rotating impeller technique was developed through experimental measurements obtained in a water physical model

Analyses of the Influencing Factors of Rotating Impeller

On the basis of similarity principle a water-simulative study of the process of rotating impeller degassing (RID) was executed by means of self-made purifying system. The influencing factors on the RID process were studied and laid a theoretical basis for the further development of this kind of technique. The shape of vortex originated in rotating of impeller and its adverse effect on

Physical Modelling of an Aluminium Degassing Operation

2018-6-16  A hydrodynamic study of aluminum degassing by the rotating impeller technique was developed through experimental measurements obtained in a water physical model stirred with different impellers and air injection. The purpose of the work was to better understand degassing operation in molten aluminum through the analysis of the hydrodynamics of

Silicon Nitride Degassing Rotor Impeller Shaft UNIPRETEC

Silicon Nitride Degassing Rotor Impeller Shaft. Because of its superior high strength, thermal shock resistance and corrosion resistance, silicon nitride degassing rotor can operate stably in high speed rotation. And because of its excellent resistance to high temperature, silicon nitride degassing rotor can maintain high performance under 1200

Rotary degassing GIESSEREILEXIKON.COM

Rotary degassing or impeller degassing is mainly used for the purification and hydrogen degassing of aluminum melts (see Hydrogen solubility). The device is placed on the crucible or treatment container or, if it is designed as a free-standing device, the rotor goes into the ladle below it (impeller station).

Effects of rotating impeller degassing on microstructure

The rotating impeller degassing technique was used for degassing of A356 scrap melt which had been protected and purified with an RE-containing JDN-I flux. Results indicated that the modification

Degassing of magnesium alloy by rotating impeller

2013-7-19  (2010). Degassing of magnesium alloy by rotating impeller degasser Part 2 effect on microstructure and mechanical properties. Materials Science and Technology: Vol. 26,

Physical Modelling of an Aluminium Degassing Operation

2018-6-16  A hydrodynamic study of aluminum degassing by the rotating impeller technique was developed through experimental measurements obtained in a water physical model stirred with different impellers and air injection. The purpose of the work was to better understand degassing operation in molten aluminum through the analysis of the hydrodynamics of

ON THE DEGASSING KINETICS IN A LADLE EQUIPPED

2011-10-11  Impeller “B” is a hollow impeller with lateral nozzles and impeller “C” has nozzles, a hole and notches. Fig. 2 shows the designs of the impellers employed in this work. Fig. 1. Schematic of the experimental setup. 1 Acrylic tank, 2 Impeller, 3 Exterior acrylic tank, 4 shaft, 5 rotating

Mathematical modeling and computer simulation of

Rotary degassing is widely used in the foundry industry for removing hydrogen gas and solid impurities from molten aluminum alloys. In this method, a specially designed impeller rotates inside the melt and gas is purged into the molten alloy through holes located at the bottom of the impeller.

(PDF) Effect of the Impeller Design on Degasification

2017-4-10  The model was employed to evaluate the relative performance of the degassing kinetics of four impeller designs, i.e., nozzles with and without notches, and with four and five blades.

Simulation of Bubble Behavior in a Water Physical Model

2019-5-29  As one of the most important dehydrogenation technologies of molten aluminum,[1,2] the rotating impeller degassing technique has been widely investigated in the degassing industry, which can improve the metallurgical quality of aluminum alloy significantly.[3,4] To further explore the factors that affect purification, water modeling and numerical simulation have been recognized as useful tools

Mathematical Modeling of Fluid Flow in a Water Physical

2012-12-14  Simulations show the flow structure of a physical model of an aluminum ladle for degassing with an injector-rotating impeller. The flow is 3D in nature, but the angular component of the velocity dominates the motion of the liquid due to the momentum exchange between the impeller and the bath. Only at high gas flow rates (40 L/min) and low

Study of Aluminum Degasification with Impeller-Injector

A full-scale water physical model of a degassing unit is built and used to evaluate the performance of several impeller designs. Four impeller designs are tested: a) one smooth not commercial impeller for reference purposes, b) a commercial design by FOSECO®, called standard impeller in this work, c) a commercial design by FOSECO® with notches, and d) a new design proposed in this work

Degassing of magnesium alloy by rotating impeller

2013-7-19  (2010). Degassing of magnesium alloy by rotating impeller degasser Part 2 effect on microstructure and mechanical properties. Materials Science and Technology: Vol. 26,

Physical modelling of an aluminium degassing operation

A hydrodynamic study of aluminum degassing by the rotating impeller technique was developed through experimental measurements obtained in a water physical model stirred with different impellers and air injection. The purpose of the work was to better understand degassing operation in molten aluminum through the analysis of the hydrodynamics of

Silicon Nitride Degassing Rotor Impeller Shaft UNIPRETEC

Silicon Nitride Degassing Rotor Impeller Shaft. Because of its superior high strength, thermal shock resistance and corrosion resistance, silicon nitride degassing rotor can operate stably in high speed rotation. And because of its excellent resistance to high temperature, silicon nitride degassing rotor can maintain high performance under 1200

ON THE DEGASSING KINETICS IN A LADLE EQUIPPED

2011-10-11  Impeller “B” is a hollow impeller with lateral nozzles and impeller “C” has nozzles, a hole and notches. Fig. 2 shows the designs of the impellers employed in this work. Fig. 1. Schematic of the experimental setup. 1 Acrylic tank, 2 Impeller, 3 Exterior acrylic tank, 4 shaft, 5 rotating

Simulation of Bubble Behavior in a Water Physical Model

2019-5-29  As one of the most important dehydrogenation technologies of molten aluminum,[1,2] the rotating impeller degassing technique has been widely investigated in the degassing industry, which can improve the metallurgical quality of aluminum alloy significantly.[3,4] To further explore the factors that affect purification, water modeling and numerical simulation have been recognized as useful tools

Mathematical Modeling of Fluid Flow in a Water Physical

2012-12-14  Simulations show the flow structure of a physical model of an aluminum ladle for degassing with an injector-rotating impeller. The flow is 3D in nature, but the angular component of the velocity dominates the motion of the liquid due to the momentum exchange between the impeller and the bath. Only at high gas flow rates (40 L/min) and low

Effect of Rotating Magnetic Field on Two-phase Flow in

Schematic of RH degassing vessel water model experi-ment system. Fig. 2. Effect of impeller input power on gas bubbles distribution in up-leg of RH vessel, Q 0.5m3/h. (a) 0W, (b) 20W, (c) 25W and (d) 35W. Fig. 3. Effect of impeller input power on circulation flow rate of RH vessel.

Study of Aluminum Degasification with Impeller-Injector

A full-scale water physical model of a degassing unit is built and used to evaluate the performance of several impeller designs. Four impeller designs are tested: a) one smooth not commercial impeller for reference purposes, b) a commercial design by FOSECO®, called standard impeller in this work, c) a commercial design by FOSECO® with notches, and d) a new design proposed in this work

DRILLING FLUID DEGASSING KEEN IND LTD,CA

I claim 1. A drilling fluid degassing unit comprising a chamber having a drilling fluid inlet and a drilling fluid exit, means for withdrawing gases from and providing a sub-atmospheric gaseous pressure within said chamber, a rotary impeller arranged to intercept incoming drilling fluid and means for rotating said impeller to agitate said fluid and fling it into the chamber interior, baffle

Nitrogen Generator for Aluminum Degassing Parker

2018-9-6  Nitrogen gas is introduced into the molten metal either by way of a static lance or a rotating impeller. The static lance method is less expensive, but also less efficient than a rotating impeller, especially in humid environments. Static lance. The static lance is