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 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 %.

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 Substantiation of parameters for the inertial mixer in a biodiesel production reactor

2021 ◽  
Vol 5 (6 (113)) ◽  
pp. 39-45
Author(s):  
Nursultan Orynbayev ◽  
Marat Aldabergenov ◽  
Kemal Zhaхylyk ◽  
Nurlan Abdildin
Keyword(s):  
Methyl Alcohol ◽  
Raw Materials ◽  
Experimental Studies ◽  
Material Balance ◽  
Molecular Composition ◽  
Biodiesel Production ◽  
Reactor Operation ◽  
Input And Output ◽  
High Degree ◽  
Minimal Power Consumption

This paper reports results of the theoretical and experimental studies into the processes of transesterification of oils with methyl alcohol, which determined the material balance and established the molecular weight of the components involved in the process of transesterification as input and output products. The theoretical and experimental studies were carried out to calculate the indicators of the process of transesterification of fat-containing wastes depending on a change in the reaction duration and diameter of the inertial mixer of the reactor to accelerate the process of transesterification of oils with methyl alcohol. The process of transesterification is one of the basic methods for modifying the molecular composition of fat raw materials. With transesterification, the composition of fat fatty acids does not change, their statistical redistribution occurs in a mixture of triacylglycerols, which leads to a change in the physicochemical properties of fat mixtures as a result of changes in molecular composition. Transesterification of high-melting animal and vegetable fats with methyl alcohol improves the conversion of oils for the production of biodiesel from fat-containing waste. The results of the theoretical and experimental studies have helped determine the value of the flow rate of the reaction mixture, as well as the values of the geometric dimensions of the reactor, were determined (the diameter of the mixer, d=100÷500 mm; the length of the reactor is 1.5÷2.0 m). Processing of the reaction mixture made it possible to obtain a high degree of homogeneity in the concentration of components with large diameters of the inertial mixer ‒ 300...500 mm at average rotational speeds. The oil conversion has been improved, as well as productivity, by using equipment to produce biodiesel from fat-containing waste. Optimal pump performance is also ensured with minimal power consumption and reactor operation

scholarly journals Resource-saving Technology for Disposal of Phenol-containing Industrial Wastewater Decontamination

2019 ◽  
Author(s):  
Keyword(s):  
Industrial Wastewater ◽  
Raw Materials ◽  
Phenol Formaldehyde ◽  
Technological Parameters ◽  
Resource Saving ◽  
Wood Polymer ◽  
Sodium Phenolate ◽  
Technogenic Raw Materials ◽  
Poly Condensation ◽  
High Degree

We have developed a resource-saving, low-waste technology for the disposal of highly toxic phenol-containing wastewater that enables to utilize phenol and formaldehyde as an organic binder. The technology involves the use of technogenic raw materials («overresin» water from the production of phenol-formaldehyde resins, soft wood waste, waste from the production and processing of laminated plastics) and processes of regeneration, recovery and conversion of phenol. The optimal technological parameters of phenol sorption on wood sorbent and secondary poly/condensation were experimentally established. This in turn provides a high degree of neutralization and extraction of resin-forming components from wastewater and subsequent production wood-polymer thermoplastic structural composite and sodium phenolate on their basis.

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 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.

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 Relating to the rational utilization of manganese-containing raw materials

2019 ◽  
Vol 75 (1) ◽  
pp. 48-56
Author(s):  
O. I. Nokhrina ◽  
I. D. Rozhikhina ◽  
I. E. Proshunin ◽  
M. A. Golodova ◽  
I. E. Khodosov
Keyword(s):  
Solid Phase ◽  
Raw Materials ◽  
Reducing Agent ◽  
Flow Chart ◽  
Technological Parameters ◽  
High Quality ◽  
Metallogenic Province ◽  
Manganese Ores ◽  
Nickel Concentrate ◽  
Manganese Concentrate

Data on main manganese ores deposits by Russian Federation subjects presented. It was shown, that main part of manganese ore raw materials prognostic resources are concentrated in Altaj-Sayan and Enisej-East-Sayan metallogenic provinces. Estimation of metallurgical value of manganese ores deposits, located at the territory of Altaj-Sayan metallogenic province, carried out. A technological flow-chart of manganese-containing raw materials elaborated, comprising high quality manganese concentrate obtaining, its preparation, synthesis of marokite and mono-phase CaMnO3 material, marokite briquetting with a reducing agent and application for steel processing in ladle-furnace facility. A possibility shown to utilization of CaMnO3 mono-phase material mixed with a reducing agent and high quality manganese concentrate for production of metal manganese. Thermodynamic calculations and experiment studies on polymetallic manganese-containing raw material beneficiation enabled to determine main technological parameters of extraction and elaborate a technological flow-chart of beneficiation. The elaborated technology enables to obtain high quality manganese, nickel, iron and cobalt concentrates. Application of optimal technological parameters of beneficiation enables to extract from a polymetallic manganese-containing raw materials up to 95–97% of manganese, 98–99% of nickel, 96–98% of iron. It was shown, that it is reasonable to use the manganese concentrate for low phosphor metal manganese smelting, that will enable to decrease the dependence from manganese-containing materials import. A technology of steel alloying by obtained nickel concentrate elaborated. The substitution of metal nickel by nickel concentrate will considerably reduce expenses for alloying. A technology of metalized iron production by a solid-phase reducing method from an iron concentrate also elaborated, which will enable to decrease impurities content in steel during its application.

scholarly journals DEPENDENCE OF STRENGTH OF FIBERBOARDS FROM TERMS OF PREPARATION OF WOOD FIBER SEMI-FINISHED PRODUCTS

2020 ◽  
pp. 467-474
Author(s):  
Venera Nurullovna Matygulina ◽  
Natalya Geraldovna Chistova ◽  
Alexander Yuryevich Vititnev
Keyword(s):  
Raw Materials ◽  
Wood Fiber ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Solid Wood ◽  
Strength Characteristics ◽  
Production Environment ◽  
Technological Parameters ◽  
Laboratory Facilities

Despite the reduced demand for fiber boards, research related to their manufacture is relevant, since the production of wood-based materials significantly contributes to solving the problem of the integrated use of wood raw materials. The paper presents the results of experimental studies reflecting the dependence of the strength characteristics of dry and wet wood fiber boards on the structural and technological parameters of grinding plants of various modifications. The experiments were carried out in laboratory facilities and in the production environment on existing industrial equipment. Based on the results of processing multifactor experiments implemented in a second-order B plan, a mathematical description was obtained of the dependence of the tensile strength during static bending of solid wood fiber boards of the dry and wet production method on the gap between the grinding disks, wear of the segments and the concentration of wood fiber mass. The obtained regression models are adequate to the process and can be applied in practice to predict the strength characteristics of fiberboards depending on the parameters of the grinding process. As a result of the analysis of the calculated and graphical dependences obtained on the basis of studies in the production environment on the existing equipment, it is possible to determine what parameters on the grinding equipment must be set in order to obtain the necessary physical and mechanical properties of the fiberboard.

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