Hydrometallurgical Technology for Processing of Galvanic Sludges

The problem of processing galvanic sludges, formed as a result of neutralization of technological solutions and wastewater containing heavy non-ferrous metals is considered. At present, sludges are transported to disposal area and are not used in any way. Typically, such sludges contain significant amounts of chromium and nickel, which creates environmental hazard. Investigated sludge contains up to 6.6% Ni and up to 7.4% Cr. The hydrometallurgical technology for processing of these sludges has been developed. Solutions of sulfuric acid and ammonia were used as lixiviants. It is shown that when using a solution of sulfuric acid with pH=1.5, extraction of up to 93.3% Cu, 70.2 Ni, 90.3 Zn is achieved. For selective recovery of nickel from leachates the process of sorption concentration by Lewatit TP207 is proposed. © Published under licence by IOP Publishing Ltd

Magnetic measurements and simulations for a 4-magnet dipole chicane for the International Linear Collider

T-474 at SLAC is a prototype BPM-based energy spectrometer for the ILC. We describe magnetic measurements and simulations for the 4-magnet chicane used in T-474

Mathematical model for research of the hydrodynamics of flows in a contact apparatus for ozonization

This work is devoted to a numerical research of the hydrodynamics of a two-phase medium. The content of this work was the description of the physical and mathematical model, the development of a numerical model and verification of the adequacy of the numerical model. In the course of the work, the adequacy of the proposed numerical model on the experimental setup was confirmed. © 2021 Author(s).Sathyabama Institute of Science and Technology, ChennaiKing Saud University, KSUThe authors acknowledge the Researchers Supporting Project Number (RSP-2021/354) King Saud University, for financial supports, Riyadh, Saudi Arabia. The author Dr. G. Murugadoss thanks the Chancellor, President, and Vice Chancellor, Sathyabama Institute of Science and Technology, Chennai for the support and encouragement

IMPROVEMENT OF EFFICIENCY OF EVAPORATION OF SOLUTIONS IN APPARATUSS WITH NATURAL CIRCULATION

The article presents a method for increasing the circulation head (circulation speed) in evaporators with natural circulation. This method allows increasing the evaporation process

TWO-PHASE FLOW HYDRODYNAMICS RESEARCH IN THE LRW OZONATION CONTACT APPARATUS

The results of CFD research of the two-phase flow hydrodynamics in the packed contact apparatus for LRW ozonation are presented. The results of the film flow VOF- simulations on the distribution device and in the packed channels of the contact apparatus are shown

Recycling of stored galvanic sludges

Целью ВКР является разработка процесса извлечения цветных металлов из гальванического шлама. Предложен вариант аммиачного растворения гальванического шлама, обеспечивающий селективный перевод в раствор никеля. Изучено сорбционное поведение никеля в сернокислых и аммиачных растворах.The object of this work is to develop the process of extraction of non-ferrous metals from galvanic sludge. The variant of electroplating sludge leaching by ammonium solution, providing selective transfer of nickel in solution is proposed. Sorption behavior of nickel in sulfuric acid and ammonia solutions was studied