Distillation electric furnaces

2018 ◽  
Author(s):  
Владимир Чередниченко ◽  
Vladimir Cherednichenko
Keyword(s):  
Mass Transfer ◽  
Heat Exchange ◽  
Molten Metal ◽  
Ferrous Metallurgy ◽  
Theory And Practice ◽  
Electric Resistance ◽  
Metal Separation ◽  
Present Book ◽  
Refining Processes ◽  
Commercial Equipment

The book deals with theory and practice of development and operation of distilling electric furnaces wherein electrotrchnological processes of separating and refining mixed metals are ac-companied by heat exchange and mass transfer between molten metal and condensation surfaces, connected by flows of vapor-gas mixtures. There are considered principles of operation and theory of distilling electric resistance furnaces, distilling induction, arc and plasma furnaces which provide for production of pure and ultrapure metals, processing powders used in bag fil-ters and in electrostatic filters, scrubbers, as well as mixed metal separation in ferrous and non-ferrous metallurgy. The book presents the results of realizing distilling process in commercial equipment. The present book is appropriated for the specialist of engineering plants and scientific organ-izations, of design and research institutions, design departments, occupied with development, manufacture and operation of the equipment applied for realizing distilling and refining processes, as well as for students, undergraduates, post-graduates and teachers of various special-ties.

scholarly journals Modern approaches to the intensification of heat and mass exchange in multi-temperature condensation filters

2021 ◽  
Vol 2039 (1) ◽  
pp. 012018
Author(s):  
M V Malevany ◽  
D A Konovalov
Keyword(s):  
Mass Transfer ◽  
Heat Exchange ◽  
Heat And Mass Transfer ◽  
Liquid Flow ◽  
Mass Exchange ◽  
Single Phase ◽  
Heat And Mass Exchange ◽  
Analytical Review

Abstract The article considers the problems and features of heat and mass exchange on developed surfaces in the conditions of both single-phase and vapour-liquid flow during its condensation. We give a brief analytical review of studies of hydrodynamics and heat exchange in such systems. We analyzed the efficiency of the working channel of the condensation filter and identified problematic points. We offer possible methods for intensifying heat and mass transfer on working surfaces.

Mixing, Mass Transfer, and Numerical Models

2021 ◽  
pp. 182-239
Author(s):  
Thorvald Abel Engh ◽  
Geoffrey K. Sigworth ◽  
Anne Kvithyld
Keyword(s):  
Mass Transfer ◽  
Water Vapour ◽  
Molten Metal ◽  
Chemical Engineering ◽  
Numerical Models ◽  
Reactor Design ◽  
Hydrogen Gas ◽  
Molten Metals ◽  
Main Metal ◽  
Contact Areas

We want to eliminate dissolved impurities to another phase: slag, gas, solid, or a molten metal that has limited solubility in the main metal. The various phases may be in the form of droplets, bubbles, particles, or walls. The contact areas with metal should be large. The aim in reactor design and operation is to achieve relatively high velocities and small dimensions. Relations for mass transfer are also included since the behaviour of systems with molten metals may be different from that usually treated in chemical engineering. In the field of turbulence the Prandtl eddy length is important for describing removal to walls. Hydrogen in aluminium and the pick-up of hydrogen in aluminium from water vapour is studied in some detail, measured, and modelled. It is taken into account that hydrogen gas is two-atomic. The approach concerning aluminium may be applied to a range of metals.

Formation and heat exchange during splashing of molten metal in CO2welding

1993 ◽  
Vol 7 (8) ◽  
pp. 632-634
Author(s):  
V T Fed'ko ◽  
S S Kiyanov
Keyword(s):  
Heat Exchange ◽  
Molten Metal

scholarly journals Innovative technology for reducing the rate of sediment formation in the power plants channels

2020 ◽  
Vol 164 ◽  
pp. 01033
Author(s):  
Anatoly Muraviev ◽  
Alexander Nadeev ◽  
Alexander Naumov ◽  
Inna Pereslavtseva
Keyword(s):  
Mathematical Model ◽  
Mass Transfer ◽  
Heat Exchange ◽  
Power Plants ◽  
Particle Distribution ◽  
Innovative Technology ◽  
System Of Equations ◽  
Sediment Formation ◽  
Shell And Tube

This paper considers the increasing the mass transfer intensity due to the use of annular baffles in the tubes of shell-and-tube heat exchange apparatuses. A mathematical model for calculating the system of equations for the evolution of particle distribution in the form of sediments has been developed.

Direct Contact Gas-Liquid Heat Exchange for Energy Recovery

1990 ◽  
Vol 112 (3) ◽  
pp. 216-222 ◽  
Author(s):  
James R. Fair
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat Exchange ◽  
Experimental Work ◽  
Direct Contact ◽  
Energy Recovery ◽  
Gas Discharge ◽  
Transfer Data ◽  
Hot Gas ◽  
Liquid Heat

Energy from hot gas discharge streams can be recovered by transfer directly to a coolant liquid in one of several available gas-liquid contacting devices. The design of the device is central to the theme of this paper, and experimental work has verified that the analogy between heat transfer and mass transfer can be used for design purposes. This enables the large amount of available mass transfer data for spray, packed, and tray columns to be used for heat transfer calculations. Recommended methods for designing the several types of gas-liquid contacting device are summarized.

scholarly journals Hydrodynamics and mass transfer with gel formation in a roll type ultrafiltration membrane

2018 ◽  
Vol 6 (2) ◽  
pp. 350-357 ◽  
Author(s):  
Sergey Babenyshev ◽  
Sergey Babenyshev ◽  
Pavel Nesterenko ◽  
Pavel Nesterenko ◽  
Andrey Bratsikhin ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Raw Materials ◽  
Ultrafiltration Membrane ◽  
Theory And Practice ◽  
Cottage Cheese ◽  
Gel Formation ◽  
Permeate Flux ◽  
Roll Type ◽  
Skimmed Milk ◽  
Milk Solids

At this point in history, mankind faces a daunting challenge: how are we to produce high-grade foods without damage to the environment? The only possible rational solution lies in the efficient use of natural raw materials. However, the practical side of the matter cannot be resolved without innovative food equipment designed on the basis of the latest scientific achievements. The current research features the theory and practice of curd whey and skimmed milk ultrafiltration. It focuses on the main operating parameters of the equipment involved and the maximum permissible value of the milk solids content. The experiment included whey, obtained as a byproduct of cottage cheese processing, and skimmed milk, obtained by whole milk separation. The membrane method in the processing of secondary dairy raw materials allows for an environmentally-friendly waste-free production. It is a promising trend in the modern food industry: it creates opportunities for a large range of novel dairy products, beverages, and animal feed, as well as for other sustainable technologies. The paper describes how the volume of permeate flux mass transfer and the selectivity of polysulfonamide ultrafiltration membranes (PSA-20 and PSA-50) depend on the volume of operating load and circulation rate during whey and skimmed milk separation. The authors analyzed the mass transfer and the hydrodynamics in the channel of a roll type baromembrane, including the gel formation process. They established the influence of the milk solids weight ratio in the liquid polydisperse system on the permeate flux volume and the selectivity of the polysulfonamide ultrafiltration membrane (PSA-50).

scholarly journals Generalization of the Fourier problem of temperature waves in half-space

2021 ◽  
Vol 24 (2) ◽  
pp. 13-21
Author(s):  
Anatoly M. Afanasyev ◽  
Yulia S. Bakhracheva
Keyword(s):  
Mass Transfer ◽  
Heat Exchange ◽  
Moisture Content ◽  
Boundary Conditions ◽  
Half Space ◽  
Seasonal Changes ◽  
Temperature Fluctuations ◽  
Solid Base ◽  
Building Structures ◽  
Temperature Waves

The problem of asymptotic fluctuations of temperature and moisture content in a half-space whose boundary is blown by an air flow with a temperature varying according to the harmonic law is solved by the method of complex amplitudes. The material filling the half-space consists of a solid base (capillary-porous body) and water. The well-known Fourier solution for temperature fluctuations in half-space in the absence of moisture and under the boundary conditions of heat exchange ofthefirst kind is generalized to the case of a wet material under the boundary conditions of Newton for temperature and Dalton for moisture content. The results of the work can be used in geocryology to model seasonal changes in the thermophysical state offrozen rocks and soils, in the theory of building structures to study the thermal regime of indoor premises with fluctuations in ambient temperature, in the theory of drying by electromagnetic radiation to study the processes of heat and mass transfer inoscillating modes.

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