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Article
Extraction of Nonferrous Metals and Arsenic from Thin Dusts of Copper Fuel Production by Combined Technology
Thin dust from copper smelting production is a valuable raw material for the extraction of heavy nonferrous, noble, and rare metals. One feature of dusts is the high content of arsenic in them, which must be r...
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Article
Choice of a Sorbent for Purification of Sulfate Zinc Solutions from Fluorine Ions
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Article
Utilization of Industrial Liquid-Waste Effluents of the Titanium–Magnesium Production
The results of studying the utilization of waste effluents of a metallurgical enterprise using centrifugation and vacuum-sublimation methods are presented. The objects of study are industrial effluents of tita...
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Article
Research into the Influence of Process Parameters on the Efficiency of Zinc Electrolysis from Alkaline Solutions
The effect of the main zinc electrolysis parameters from an alkaline zincate solution on the current efficiency and power consumption is studied in laboratory conditions. The zinc concentration (initial and fi...
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Article
Influence of Thermal Treatment on Copper Extraction from Electronic Wastes
The results of studying the influence of the preliminary thermal treatment of crushed electronic waste (EW) at a temperature of 450°C on the copper extraction degree during the subsequent leaching of materials...
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Article
Investigation into regularities of leaching sulfated cinders of roasting copper–zinc middlings
Results of an analysis of thermodynamic characteristic and the investigation into kinetic regularities of leaching a new type of sulfated copper–zinc middlings formed with the removal of sulfide materials that...
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Article
Improving the precipitation of arsenic trisulfide from washing waters of sulfuric-acid production of copper smelteries
Disadvantages of the sulfide method of purifying washing waters of the sulfuric-acid production are the formation of finely dispersed (particle size from 0.3 to 1.5 μm) difficult-to-filter precipitates of arse...
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Article
Features of Shaimerden Deposit Oxidized Zinc Ore Leaching
The object studied is Shaimerden oxidized zinc ore deposit containing zinc, lead, copper, iron, calcium, magnesium, aluminum, manganese and silicon. Chemical and mineralogical composition of the ore are invest...
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Article
Nitric Acid Leaching of Copper-Zinc Sulfide Middlings
Nitride leaching of copper-zinc sulfide middlings that are difficult to concentrate is studied with the aim of clarifying and supplementing results obtained previously. It is shown that organization of two-sta...
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Article
Study of Zinc-Lead-Containing Cake Leaching Features
The research subject is an intermediate product of zinc production containing lead, zinc, iron, copper, and silver. Thermodynamic analysis is performed for all probable transformations during sulfuric acid lea...
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Article
Optimum Parameters of the Electroextraction of Copper from Nitrate-Bearing Solutions
Results are presented from potentiodynamic studies of the electroextraction of copper from nitrate solutions. The results yield new information on the effect of the composition of the electrolyte, current dens...
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Article
Investigation into the kinetic regularities of impurity transfer during the sulfuric acid leaching of the zinc-containing intermediate product of two-stage Waelz process of zinc cakes: Part I. leaching kinetics of individual model oxides
Kinetic regularities of impurity transfer into the solution when leaching the calcined Waelz oxide of zinc production are determined by leaching the individual iron, copper, and lead oxides. The escape of impu...
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Article
Investigation into the kinetic regularities of impurity transfer during the sulfuric acid leaching of the zinc-containing middlings of two-stage Waelz process of zinc cakes: Part II. regularities of sulfuric acid leaching the industrial samples of calcined Waelz oxide of zinc production
Kinetic regularities of leaching the actual industrial sample of calcined Waelz oxide of zinc production are determined. The basic reaction mechanism is established. The dissolution of solid-phase particles ca...
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Article
Nitric acid leaching of polymetallic middlings of concentration
Investigations into the nitric acid leaching of polymetallic middlings with the purpose of the maximal recovery of copper and zinc into the solution are performed. Using methods of mathematical planning of the...
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Article
Status of the organized recycling of cadmium-bearing secondary raw materials
The main methods being used in metallurgy to systematically recycle cadmium-bearing secondary raw materials are examined. Hydrometallurgical methods which use sequestering reagents that can be regenerated are ...
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Article
Technology for the hydrometallurgical processing of a complex multicomponent sulfide-based raw material
An analysis of the methods currently used for the metallurgical processing of polymetallic middlings from the beneficiation of sulfide ores shows that the oxidant which is the most promising for use as an agen...
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Article
Processing of technogenic lead-containing intermediates using complexing agent solutions
Methods are reviewed for processing technogenic lead-containing waste from nonferrous metallurgy enterprises. Use of different amine and phosphorus-containing complexing agents is considered. Process character...
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Article
Synthesis and structure of Schiff bases derived from 3-formyl-4-hydroxycoumarin and diamines
The mono- and diimine products from the condensation of 3-formyl-4-hydroxycoumarin and various diamines were synthesized. It was shown by 1H NMR and mass spectrometry that the obtained compounds in DMSO-d6 soluti...
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Article
Electroextraction of lead from a lead trilonate solution
Laboratory studies of the cathode process of the electroextraction of zinc from the trilonate electrolyte obtained after the purification of solutions after leaching lead cakes of zinc production are performed...
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Article
Kinetics of leaching of copper concentrates by nitric acid
Based on the study of the kinetics of leaching of copper concentrates by nitric acid, the limiting stages, reaction rate constants, activation energies, and general and partial orders of reactions of the compo...
