scholarly journals Hydrometallurgical enrichment of polymetallic and ferromanganese ore

2021 ◽  
Vol 64 (4) ◽  
pp. 273-281
Author(s):  
O. I. Nokhrina ◽  
I. D. Rozhikhina ◽  
I. A. Rybenko ◽  
M. A. Golodova, ◽  
A. O. Izrail’skii
Keyword(s):  
Raw Materials ◽  
Experimental Studies ◽  
Thermodynamic Calculations ◽  
Technological Scheme ◽  
Theoretical Research ◽  
Technological Parameters ◽  
High Quality ◽  
Nickel Iron ◽  
Series Of Experiments ◽  
Processed Products

The article presents the results of theoretical and experimental studies of leaching of polymetallic manganese-containing and ferromanganese ore. Thermodynamic calculations and experimental studies on enrichment of manganese-containing raw materials made it possible to determine the main technological parameters of the extraction of manganese, iron and non-ferrous metals, and to develop technological schemes for enrichment of various types of manganese-containing raw materials. The studies were carried out for polymetallic and ferromanganese ores of the Kaigadat deposit, the Selezen deposit, the Sugul site, located in the Kemerovo Region – Kuzbass. Before carrying out laboratory studies, the authors have performed thermodynamic analysis of ore leaching, chemical and X-ray structural analyzes of the samples. Laboratory tests were carried out on a multichamber autoclave unit MKA-4-75 using calcium and iron chlorides as solvents. Since the introduction of a reducing agent into the charge during leaching significantly improves the conditions for dissolution of oxides and hydroxides of manganese in calcium chloride, a series of experiments was conducted with the use of charcoal in the charge. Thermodynamic calculations have shown that the leaching process is fully implemented in the temperature range from 323 to 673 K. The results of the experiments confirmed the theoretical research results. The obtained data allowed the authors to propose a technological scheme for hydrometallurgical enrichment of polymetallic and ferromanganese ores to produce high-quality concentrates. All processed products are suitable for use. The use of optimal technological parameters of enrichment allows 95–97 % of manganese, up to 80 % of nickel, up to 99 % of cobalt, and 96–98 % of iron to be extracted from polymetallic manganese-containing raw materials. As a result of the deposition of these elements, high-quality concentrates of manganese, nickel, iron, cobalt are obtained. According to the proposed technological scheme for ferromanganese raw materials with a high content of silicates, it is possible to obtain high-quality concentrates of manganese and iron, while the extraction of manganese is 90–92 %, and of iron – 86–90 %.

A possibility of using nickel concentrate, obtained as a result of hydrometallurgical enrichment of manganese-containing raw materials, at steel alloying

2020 ◽  
Vol 76 (7) ◽  
pp. 709-715
Author(s):  
O. Yu. Kichigina
Keyword(s):  
Raw Materials ◽  
Experimental Studies ◽  
Selective Extraction ◽  
Technological Parameters ◽  
Nickel Iron ◽  
Nickel Recovery ◽  
Nickel Concentrate ◽  
Steel Alloying ◽  
High Degree ◽  
Comprehensive Processing

At production of stainless steel expensive alloying elements, containing nickel, are used. To decrease the steel cost, substitution of nickel during steel alloying process by its oxides is an actual task. Results of analysis of thermodynamic and experimental studies of nickel reducing from its oxide presented, as well as methods of nickel oxide obtaining at manganese bearing complex raw materials enrichment and practice of its application during steel alloying. Technology of comprehensive processing of complex manganese-containing raw materials considered, including leaching and selective extraction out of the solution valuable components: manganese, nickel, iron, cobalt and copper. Based on theoretical and experiment studies, a possibility of substitution of metal nickel by concentrates, obtained as a result of hydrometallurgical enrichment, was confirmed. Optimal technological parameters, ensuring high degree of nickel recovery out of the initial raw materials were determined. It was established, that for direct steel alloying it is reasonable to add into the charge pellets, consisting of nickel concentrate and coke fines, that enables to reach the through nickel recovery at a level of 90%. The proposed method of alloying steel by nickel gives a possibility to decrease considerably steel cost at the expense of application of nickel concentrate, obtained out of tails of hydrometallurgical enrichment of manganese-bearing raw materials, which is much cheaper comparing with the metal nickel.

scholarly journals IMPROVEMENT OF THE TECHNO¬LOGY FOR OBTAINING MANGANESE(IV) OXIDE FROM SECONDARY RAW MATERIALS

2021 ◽  
Vol 2 (37) ◽  
pp. 109-113
Author(s):  
D. Yelatontsev ◽  
O. Kharitonova
Keyword(s):  
Raw Materials ◽  
Manganese Content ◽  
Experimental Studies ◽  
Acid Leaching ◽  
Raw Material ◽  
Technological Scheme ◽  
Mineral Fertilizers ◽  
Technological Parameters ◽  
Long Run ◽  
Pure Compounds

Today's level of integrated use of minerals and beneficiation wastes in Ukraine, in particular, at the Kryvbas GOK, is unsatisfactory, as it is generally allowing the production of additional types of construction products. The volume of mining is growing, but only a small percentage of the extracted volume is transferred to the finished product. The residue in the form of waste is returned to the environment, polluting it. The reason for this is the lack of technology for integrated mineral processing and waste disposal. The article presents the results of industrial tests of off-balance manganese ore processing technology of Ordzhonikidze GOK with a manganese content of 15–30%. It is shown that nitric acid leaching of manganese with subsequent precipitation of impurities with soda or alkali allows you to consistently purify manganese from transition and alkaline earth metals. The obtained manganese oxide has a high degree of purity, which allows obtaining pure compounds Mn (NO3)2∙6H2O, MnO2 and metallic manganese for chemical current sources. The use of columnar clarifiers with a fluidized bed with the application of pulsations allowed to eliminate time-consuming filtration processes. Concomitantly formed sodium nitrate serves as a raw material for mineral fertilizers. Experimental studies on the beneficiation of off-balance manganese ores allowed us to determine the main technological parameters of the extraction of components and to develop a technological scheme of beneficiation. According to the proposed technological scheme, it is possible to obtain high-quality concentrates of manganese (IV) oxide. The use of optimal technological parameters of enrichment allows up to 95% of Mn to be extracted from off-balance manganese raw materials. In the long run, this will reduce dependence on imports of manganese raw materials and significantly reduce the cost of domestic manganese products.

scholarly journals Manganese ores of the Kemerovo region – Kuzbass and methods of their enrichment

2020 ◽  
Vol 63 (5) ◽  
pp. 344-350
Author(s):  
O. I. Nokhrina ◽  
I. D. Rozhikhina ◽  
A. I. Edil’baev ◽  
B. A. Edil’baev
Keyword(s):  
Iron Oxide ◽  
Main Part ◽  
Raw Materials ◽  
Experimental Studies ◽  
Economic Feasibility ◽  
Technological Parameters ◽  
High Quality ◽  
Specific Content ◽  
Manganese Ores ◽  
Manganese Concentrates

Manganese ores of the vast majority of domestic deposits are of low quality: with low content of manganese (18 – 24 %) and high specific content of phosphorus (ratio P/Mn > 0.006). They have an increased content of iron and silicon and they are difficult to enrich. The main part of balance reserves of manganese ores – 98.5 million tons (64.2 %) is concentrated in large Usinskoye field in the Kemerovo region. In addition to Usinskoye, there are also deposits in this region Kaigadatskoye (32.7 million tons), Durnovskoye (300 thousand tons), Selezenskoye fields and the Chumay plot. For a comprehensive approach to solving the proposed problem it is needed to assess technical and economic feasibility of all stages (exploration, extraction and enrichment of manganese ores, their subsequent processing and consumption) of involvement of manganese ores from these deposits in production. Using developed technology of calcium-chloride enrichment, high-quality manganese concentrates are obtained from carbonate, including high-phosphorous ores of the Usinskoye field, poor oxide and ferromanganese ores of the Selezenskoye and the Durnovskoye fields. Extraction of manganese from manganese-containing raw materials into concentrate was at least 90 %. The resulting concentrate contains 58 – 64 % of manganese, less than 0.01 % of phosphorus, 0.02 – 0.05 % of iron oxide, 0.5 – 1.0 % of silica and sulfur. Thermodynamic calculations and experimental studies on the enrichment of polymetallic manganese-containing ores from the Chumay plot allowed us to determine the main technological parameters for extracting valuable components. The use of optimal technological parameters of enrichment allows extraction of up to 95 – 97 % of manganese and 98 – 99 % of nickel from raw materials.

scholarly journals STUDY OF THE INFLUENCE OF TECHNOLOGICAL PARAMETERS ON THE GRANULOMETRIC CHARACTERISTICS OF SUBMICRON ALUMINUM OXIDE IN α-FORM

2021 ◽  
Vol 6 (12) ◽  
pp. 84-97
Author(s):  
M. Troubitsin ◽  
N. Volovicheva ◽  
L. Furda ◽  
N. Skrypnikov
Keyword(s):  
Fine Particles ◽  
Raw Materials ◽  
Experimental Studies ◽  
High Yield ◽  
Cylindrical Shape ◽  
Grinding Process ◽  
Activated Alumina ◽  
Technological Parameters ◽  
Granulometric Characteristics ◽  
Kinetics Of

Experimental studies of the influence of technological parameters of grinding alumina raw materials in a ball mill on the kinetics of the grinding process and the granulometric characteristics of activated alumina in the α-form have been carried out. It is found that the use of spherical grinding bodies leads to the formation of a specific four-modal granulometric composition with maxima: 0.5; 4.0; 50.0 and 400.0 microns, respectively. The disadvantage of using spherical grinding bodies is the uneven distribution of the introduced intensifier additive (PEG), which in turn causes adhesion of fine particles and the appearance of aggregates. This is especially pronounced at n = 100 rpm. When using grinding bodies of cylindrical shape, on the contrary, there is a tendency towards a bimodal nature of the distribution of particles with maxima in the regions of 0.4 and 4 μm, respectively, regardless of the rotation speed of the drum (n). The use of cylpebs does not provoke agglomeration of the fine particle fraction, which is observed in the case of spherical grinding bodies. When analyzing the kinetics of grinding alumina raw materials, two main stages of the process are identified. The first stage corresponds to the active fragmentation of large initial aggregates into constituent crystallites by the cleavage mechanism. The second stage corresponds to a change in the grinding mechanism from crushing to abrasion. It is found that carrying out the grinding process for 10 hours using cylindrical grinding bodies at n = 100 rpm and φ = 0.35 provides a high yield of the submicron fraction of the target product (1 μm) - up to 20 wt. %.

scholarly journals INVESTIGATION OF THE APPLICATION OF A NEW METHOD OF EXTRACTION INTENSIFICATION OF PECTIN SUBSTANCES FROM A BEET PULP

2018 ◽  
Vol 4 ◽  
pp. 21-28
Author(s):  
Gregoriy Deynichenko ◽  
Vasyl Guzenko ◽  
Dmytro Dmytrevskyi ◽  
Vitalii Chervonyi ◽  
Tatiana Kolisnichenko ◽  
...  
Keyword(s):  
Raw Materials ◽  
Experimental Studies ◽  
Extraction Process ◽  
New Method ◽  
Acid Extraction ◽  
Regression Equations ◽  
Technological Parameters ◽  
Beet Pulp ◽  
Working Parameters ◽  
Pectin Substances

The aim of research is studying a new method for intensifying extraction of pectin substances during acid extraction of pectin-containing raw materials. The description of the experimental setup and the procedure for processing the results of the investigation of the application of a new method for intensifying the beet pulp extraction are described. The results of experimental studies on the application of a new combined mixing element for intensifying the extraction of pectin-containing raw materials (beet pulp) and its effect on quantitative and qualitative output characteristics are presented. Mathematical models are constructed on the basis of regression equations of the full factorial experiment with the use of a new method of intensifying the extraction process to select input technological parameters for the extraction of pectin substances from pectin-containing raw materials. The rational operating parameters of the process of extraction of pectin substances with the use of a new combinable stirring element are determined. Such working parameters are: the process duration is 1 ... 1.1, the temperature of the working medium is 60 ... 70 ºС, and the hydromodule is 8 ... 10. The research results can be used to study other technological parameters of the extraction process of pectin substances, as well as to develop a technological line for the production of pectin products.

scholarly journals Incoming control parameters for PVC sheets used for the production of plastic cards

2021 ◽  
pp. 25-27
Author(s):  
Olena Nazarenko
Keyword(s):  
Raw Materials ◽  
Experimental Studies ◽  
Parameter Control ◽  
Control Parameters ◽  
High Quality ◽  
Product Quality Control ◽  
Density Surface ◽  
Form Quality ◽  
Strength Uniformity ◽  
Quality Policy

One of the main requirements for obtaining high-quality raw materials for production is a clear formulation of the necessary parameters that the manufacturer of materials must comply with in the production of raw materials. The very observance of these parameters in the future will reduce the number of production of unsuitable products and plastic cards with defects. Parameter control is carried out for each separate batch of materials. The sample during inspection should be at least 0.1 % of the total amount of material, the deviation from the parameters should be included in the tolerance. The tasks of the stage of product quality control should ensure the implementation of the quality policy, as well as the general economic policy of the enterprise. Control is an integral part of the activities of any enterprise, a regulator of factors that form quality at all stages of the production process and ensure the release of quality products. Based on the analysis and experimental studies, the main parameters that need to be monitored were determined: geometric dimensions, color, thickness, density, surface tension, tensile strength, uniformity of paint application, shrinkage during sheet sintering

scholarly journals INVESTIGATION OF THE INTENSIVE TECHNOLOGY OF FOOD SPROUTS USING ORGANIC ACIDS

2020 ◽  
Vol 2 ◽  
pp. 45-53
Author(s):  
Olena Kovaliova ◽  
Yuriy Chursinov ◽  
Viktoriia Kalyna ◽  
Tatyana Khromenko ◽  
Ekaterina Kunitsia
Keyword(s):  
Organic Acids ◽  
Raw Materials ◽  
Experimental Studies ◽  
Total Duration ◽  
Food Products ◽  
Quality Parameters ◽  
High Quality ◽  
Growth Stimulator ◽  
Germination Process ◽  
Active Formation

The features of the intensive technology of getting food sprouts with organic acids as an intensifier of germination were studied. The aim was to establish the features of the intensive technology of producing sprouts of different crops with using organic acids at germination (butanedioic, 3-pyridine carbonic, pteroylglutamic). It is important to search new and safe germination stimulators of universal use. Such substances are just the studied organic acids, because positive changes of quality parameters of a ready product are traced at their use in the sprout technology. There was studied the sprout technologies that includes washing, disinfection, step-by-step air-water soaking of grains from different crops and their germination. As a disinfectant and growth stimulator at the stage of grain material soaking, there were used water solutions of the organic acids in the concentration diapason from 0.025 to 2.5 g/l. Due to their use, it became possible to get high-quality healthy food products, namely sprouts of different crops. Organic acid solutions stimulate the germination process and allow to get an essentially higher amount of high-quality sprouts in shorter terms without chemical toxic admixtures. The research results of the influence of the mentioned organic acids on germination indices of different grains materials are presented. Optimal values of concentrations of active substances in solutions have been established. Comparing with the classic technology of using these acids as a growth stimulator for sprouts allows to decrease the total duration of material germination in 1.5–2 times. Due to that it becomes possible to initiate the industrial production of sprouts. The experimental studies proved the effectiveness of using organic acids at getting living sprouts. It is demonstrated, that their use allows not only to intensify grains germination, but also favors more active formation of sprouts. The presented technology of producing sprouts of different crops is innovative. The obtained grain raw materials may be used independently or as an important component of new food products.

scholarly journals PHYSICAL AND CHEMICAL STUDIES OF THE OIL SLUDGE HYDROCARBON COMPOSITION AND THE PROSPECTS FOR THEIR USE IN THE TECHNOLOGY OF EXPANDED CLAY PRODUCTION

2020 ◽  
Vol 5 (443) ◽  
pp. 28-37
Author(s):  
Bisenov Kylyshbai Aldabergenovich, ◽  
◽  
Narmanova Roza Abdibekovna, ◽  
Appazov Nurbol Orynbassaruly, ◽  
◽  
...  
Keyword(s):  
Raw Materials ◽  
Ceramic Body ◽  
Construction Material ◽  
Experimental Studies ◽  
Hydrocarbon Composition ◽  
Organic Content ◽  
Oil Sludge ◽  
Technological Parameters ◽  
Combustion Gas ◽  
Physical And Chemical

The article presents the results of gas chromatographic studies of the oil sludge hydrocarbon composition, physical and chemical and heat-producing properties, which enabled to assess the potential of oil sludge as raw materials, their assortment predisposition and possible manufacturability. It has been established that the main physical and chemical characteristics of the organic part from the averaged samples of oil sludge are similar in properties to raw materials for the production of kerosene-diesel fractions. The expediency of the use of oil sludge and weakly bloating clay materials in the production technology of the popular construction material – expanded clay is substantiated. The results of experimental studies on the development of light and porous heat insulating material by granulation method are presented herein. It is shown that oil sludge from a high viscous state is transferred to a loose conglomerate with a moisture content of 12–15% by co-mixing with finely dispersed sand dune, which ensures uniform distribution when mixed with the basic mass. The peculiarities of granules burning according to a specially developed mode without preliminary drying are considered. It has been established that the addition of oil sludge increases the organic content in the mixture, thereby intensifying the process of combustion, gas generation and bloating of the ceramic body, which will positively affect the technological parameters of obtaining а product. It is found that the proposed technology allows to obtain marketable products, which can be used efficiently. At the same time, the unconditional priority is given to waste-free technologies, as the most environmentally friendly.

EFFICIENCY OF FLAX SEEDS DISINTEGRATION IN THE CENTRIFUGAL HULLING MACHINE

2019 ◽  
Author(s):  
В.А. ЗУБЦОВ ◽  
С.В. ЗВЕРЕВ ◽  
Ю.Ф. РОСЛЯКОВ ◽  
В.В. ГОНЧАР
Keyword(s):  
Dietary Fiber ◽  
Raw Materials ◽  
Coarse Fraction ◽  
Technological Scheme ◽  
Series Of Experiments ◽  
Flax Seeds ◽  
Kernel Yield

Рассмотрены результаты обрушивания семян масличного льна сорта Северный (Барнаул, ООО «АгроЛен») различной степени обработки – нативные, обезвоженные, бесслизевые на центробежном шелушителе. В серии экспериментов с обезвоженным до 2–3% и бесслизевыми семенами процент выхода ядра был значительно выше, чем при шелушении нативных семян льна влажностью 5–6%: 30 и 28% против 21% соответственно. Представлена формула для расчета необходимой производительности оборудования по сырью при задании производительности по продукту и с учетом коэффициента возврата недоруша, образующегося в процессе шелушения крупной фракции, на доизмельчение. Предлагаемый вариант технологической схемы обрушивания семян льна позволяет достаточно эффективно выделить из семян льна фракцию с повышенным содержанием белка, масла и оболочки с повышенным содержанием лигнанов и пищевых волокон. Results hulling of seeds of oil flax varieties of the Severnyy (Barnaul, LLC «Agrolen») of various degrees of processing – native, dehydrated, non-syllable in the centrifugal hulling machine are considered. In a series of experiments with dehydrated to 2–3% and non-syllable seeds the percentage of kernel yield was significantly higher than with peeling of native flax seeds with humidity of 5–6%: 30 and 28% against 21%, respectively. The formula for calculating the required performance of the equipment for raw materials when setting the performance of the product and taking into account the return factor of the seeds that have remained undisturbed formed in the process of peeling the coarse fraction for regrinding is presented. The proposed variant of the technological scheme of flaking of flax seeds allows you to allocate effectively to select from them a fraction with a high content of protein and oil and shell with a high content of lignans and dietary fiber.

scholarly journals Study of thermal resistance of cold mixtures with clay addition

2021 ◽  
Vol 316 (1) ◽  
pp. 91-97
Author(s):  
A. A. Alina ◽  
◽  
V. Y. Kulikov ◽  
P. V. Kovalev ◽  
A. M. Dostayeva ◽  
...  
Keyword(s):  
Technological Parameters ◽  
High Quality ◽  
Curing Conditions ◽  
Gaseous Products ◽  
Dispersed Medium ◽  
Experimental Laboratory ◽  
Steel Castings ◽  
Series Of Experiments ◽  
Kinetics Of

The article analyzes the results of heat resistance of cold-harmful mixtures with the addition of clay. The article presents the results of an experimental laboratory study of the properties of samples from CTS, obtained by various methods. The scientific novelty of the technology lies in the fact that the technology of casting in cold-rolled steel ensures high quality of the casting surface, the absence of gas defects and blockages in the casting. The selection of the composition and technological parameters for the manufacture of the mold, contributing to the production of high-quality defect-free castings, will significantly reduce their cost, which will have a positive effect on the economy of our country. The study of the change in density over time depending on the applied load was studied in a series of experiments. The density of the mixture was determined every thirty seconds during the entire time of the formation of the dispersed medium. These experiments showed that at the beginning of the formation of the shell, its density increases significantly. In works on the thermal stability of polymers, the general laws of thermal decomposition and carbonization of cyclic, spatially crosslinked hot curing polymers were investigated and it was shown that the kinetics of destruction, the composition of gaseous products, the amount of coke formed and its properties depend on the properties of the initial polymers - the degree of crosslinking of molecular chains, chemical structure, the presence of impurities of catalysts and other curing conditions, as well as the heating conditions - speed and temperature. The article summarizes some of the results of the study, which is most appropriate for thin-walled steel castings to use the following mixture composition: filler - quartz sand; binder - clay of the Kazakhstani deposit, epoxy resin, hardener.

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