Development of new technological solutions for recovery of heavy nonferrous metals from technogenic waste of electroplating plants and sludge of water treatment systems
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 2, Issue 10
Abstract
<p>In galvanic cakes and municipal wastewater sludge, there are significant amounts of heavy non-ferrous metals, which are classified as hazard class I ecotoxicants and are currently being disposed. The existing methods of toxic waste processing do not provide for the selection and efficient recovery of valuable components. However, the cost of non-ferrous and precious metals and their industrial content in these types of technogenic waste allow justifying the payback and profitability of their industrial processing.</p><p>Based on the laboratory and large-scale laboratory experiments, flow diagrams of processing of galvanic cakes and wastewater sludge are proposed. The calculated kinetic and thermodynamic characteristics (activation energy, time of complete dissolution, Gibbs free energy value), the recovery parameters of heavy non-ferrous metals (ε<sub>Cu</sub>=99.5 %, ε<sub>Ni</sub>=99.5 %, ε<sub>Zn</sub>=99.9 %) indicate the possibility of industrial implementation of the given flow diagrams. Dependencies of copper recovery on temperature and leaching time are presented. The obtained results allow speaking about the kinetic limitation of the process of galvanic cake leaching (Е<sub>Cu</sub>=15.7 kJ/mol) and demonstrate the possibility of conducting the process at low temperatures (t=40 <sup>o</sup>C), which leads to lower energy consumption.</p><p>The advantage of the proposed options of processing of galvanic cakes and wastewater sludge is the presence of commercial equipment, the use of traditional hydrometallurgical processes, availability and low cost of reactants, short payback periods and anthropogenic load reduction.</p>
Authors and Affiliations
Mikhail Barkan, Anton Kornev
Keywords
Related Articles
- EP ID EP527921
- DOI 10.15587/1729-4061.2018.128532
- Views 89
- Downloads 0
Improving control efficiency in buffering systems using anticipatory indicators for demand forecasting
<p>Optimization of the stock management process is associated with the search for a forecasting model, a method for generation of a forecasting time series, a model of logistic operation, determining a reasonable level o...
Iterative hard-decision decoding of combined cyclic codes
<p>We propose error correction iteratively decodable cyclic codes (IDCC) that consist of two cyclic Hamming codes with different generator polynomials. As a mathematical apparatus, we apply the theory of linear finite-st...
The optimization algorithm for the directions of influence of risk factors on the system that manages the potential of machine-building enterprises
<p>The lines of influence of risk factors on the system of management of financial potential of machine-building enterprises were determined. Their application makes it possible to provide enterprises with complete and r...
Definition of a composite index of glazing rooms
<p>The effect of geometrical parameters of rooms and window openings on the value of the daylight factor (DF) in the reference point on the work surface is considered in the article. This is important, as while using a l...
Influence of the thermal factor on the composition of electronbeam highentropy ALTiVCrNbMo coatings
<p>This paper reports results of studying the element and phase compositions of electron-beam coatings based on the high-entropy alloy AlTiVCrNbMo, depending on the deposition temperature (in the range of 300...700 °С).<...