International Journal of Scientific Bulletin
IJSB follows an open-access policy, ensuring that published articles are freely available to a wide audience. Through this approach, the journal strives to facilitate the rapid global dissemination of scientific knowledge.
Implementing Artificial Intelligence in Financial Services
Financial institutions' operations are altering due to artificial intelligence's (AI) rapid adaption, particularly in terms of its ability to manage risk and efficiency. The purpose of this article is to investigate the relationship between the Eastern Province's financial institutions' usage of AI, its operational efficiency, and the efficacy of risk management. A standardized questionnaire was distributed to banks, insurance businesses, investment firms, and fintech organizations in order to implement the quantitative research approach. Out of 100 surveys distributed, 75 valid replies were obtained, representing a 75% response rate. A five-point Likert scale was used for data measurement, and Pearson correlation analysis was employed for data analysis. The results show a strong positive correlation between the use of AI and both operational productivity and risk control and anti-fraud capabilities. These findings support the study's hypothesis and demonstrate that efficiency and risk management increase with increasing AI usage. The study provides solid empirical data on the use of AI in financial organizations and can be used by practitioners and policymakers, even though the causal linkages cannot be taken into account. To further understand how AI affects financial performance, it is advised that future studies employ larger sample sizes and more advanced analytical techniques.
Copper Ion-Conducting PVP-Based Solid Polymer Electrolyte with TiO₂ Nanofiller for Solid-State Battery Applications Cu Ion Solid Polymer Electrolytes for Energy Storage Devices
The growing demand for sustainable and efficient energy storage solutions has led to the development of rechargeable battery technologies. Solid polymer electrolytes (SPEs) have been considered as a promising alternative to the conventional liquid electrolytes because of their better safety and mechanical flexibility. A series of solid polymer electrolytes based on polyvinylpyrrolidone (PVP) doped with Cu2+ were prepared by solution casting in the present study. The formation of complex was confirmed by FTIR and UV-Visible spectroscopy. The ionic conductivity at room temperature was highest (1.07 × 10⁻3 S cm⁻¹) for the 15% Cu²⁺ doped PVP electrolyte. The conductivity was further improved to 1.65 x 10-3 S cm-1 on incorporation of 0.2% TiO2 nanofiller. Temperature dependent studies showed the optimum operating temperature to be 60 °C with maximum conductivity of 1.97 × 10−3 S cm−1. The Cu2+/PVP/TiO2 composite electrolyte has the potential to be applied in the flexible, all-solid-state and temperature-variable rechargeable battery systems.
Polyvinylpyrrolidone (PVP), Solid polymer electrolyte, UV-Visible spectroscopy, FTIR, Nanofiller, Ionic conductivity
Effect of Biogas Slurry Foliar Application on Growth and Yield Performance of Red Onion (Allium cepa L.)
The study was conducted to evaluate the effect of biogas slurry combined with the inorganic fertilizer on the growth and yield performance of red onion (Allium cepa L.). This study was designed with four treatments having five replicates. Treatments are T1 with recommended fertilizer (control treatment), T2 -1:1, T3-1:2 and T4 -1:3 (slurry: water on the volume basis). Except the control treatment 1/3 of recommended fertilizers by Department of Agriculture (RDOA) were applied to the other treatments. All agronomic practices were done according to the DOA recommendation. Canopy height, number of leaves were measured at weekly interval. Fresh and dry weight of plant, Bulb diameter, number of bulbs and yield were measured at the time of harvesting (6th week after planting). Analysis of variance was performed to determine significant differences among the treatments (p<0.05) by using Minitab 17.0 software. The results showed that these treatments, combining with inorganic fertilizers with biogas slurry significantly enhanced the growth and yield performance (T3 and T4) compared to the control treatment (T1). Especially in the T4 concentration than the other treatments, this treatment significantly enhanced plant height up to 52.14±2.79 cm, leaf number up to 8.60±0.24, and bulb’s diameter up to 2.70±0.05 cm. The findings suggest that biogas slurry can serve as an effective organic foliar fertilizer combined with inorganic fertilizer, contributing to improved growth and potentially higher yield in red onion cultivation.
Biogas, Canopy, Comparison, Concentration, Slurry, Yield.
Comparative Analysis of Hydrometallurgical and Pyrometallurgical Technologies for Lithium Recovery from Spent Lithium-Ion Batteries
The rapid growth in the production and consumption of lithium-ion batteries has led to a significant increase in battery waste, creating both environmental challenges and opportunities for resource recovery. Lithium is considered one of the most critical strategic metals due to its widespread use in energy storage systems, electric vehicles, and portable electronic devices. Therefore, the development of efficient technologies for lithium recovery from spent lithium-ion batteries has become an important research direction. This paper presents a comparative analysis of hydrometallurgical, pyrometallurgical, and hybrid recycling technologies used for lithium recovery from spent lithium-ion batteries. The advantages and limitations of each approach are discussed with respect to lithium extraction efficiency, energy consumption, environmental impact, process complexity, and industrial applicability. Particular attention is given to the recovery of lithium from layered lithium metal oxide cathode materials such as LiCoO₂ and LiNiCoMnO₂. In addition, current industrial recycling processes and their effectiveness in lithium recovery are reviewed. The analysis demonstrates that hydrometallurgical methods provide higher lithium recovery efficiency and product purity, while pyrometallurgical technologies offer better scalability and operational simplicity. Hybrid processes combining both approaches are identified as promising alternatives for achieving sustainable and economically viable lithium recycling. The results highlight the importance of developing integrated recycling technologies to support the circular economy and secure future lithium resources.
Lithium-ion batteries, lithium recovery, hydrometallurgy, pyrometallurgy, battery recycling, lithium extraction, cathode materials, circular economy, sustainable metallurgy, critical raw materials
Study of the Grindability of Oxidized Copper Ores of the Kalmakyr Deposits
The aim of this study is to prepare a process sample of oxidized copper ores from the Kalmakir deposits for laboratory testing. To determine and analyze the chemical, mineralogical, and particle size distribution of the process ore, as well as its moisture content, it is necessary to grind the ores. The sieve characteristics, the distribution of metals by size class of the oxidized ore, and the dependence of the -0.074 mm grade yield on grinding time were determined.
ore, copper, process sample, recovery, grinding method.
Processing of Technological Solutions Generated in the Production of Copper Cuprate at Almalyk MMC JSC
This article studies the issues of complex processing of technological solutions formed during the production of copper sulfate and selective extraction of nickel, one of the valuable components in them. In the modern metallurgical industry, the processing of technogenic solutions, the extraction of valuable metal components from them, and the reduction of production waste are of great scientific and practical importance. Technological solutions formed in the sulfate shop of the “Almalyk KMK” JSC Copper Smelting Plant were selected as the object of research. These solutions contain copper, nickel, zinc, iron, and other components, which have great economic value as secondary raw materials. During the research, various methods of extracting metals from solutions were analyzed, including precipitation in the form of hydroxides, extraction, sorption, and ion flotation. The possibilities of selective separation of copper and nickel ions by controlling the pH value of the solution medium using a solution of slaked lime were studied. The experimental results showed that in the pH range of 6.0–6.5, up to 98.67–99.11% of copper precipitates in the form of hydroxide, while the main part of nickel remains in solution. This creates favorable conditions for the extraction of nickel in the subsequent stages. Based on the results obtained, an effective technological scheme for the selective extraction of nickel from copper sulfate production solutions was developed. The proposed technology allows for the integrated use of metal resources, reducing the amount of technogenic waste, and increasing economic efficiency.
nickel, copper sulfate, technological solution, selective precipitation, hydrometallurgy, hydroxide, extraction, sorption, ion flotation, metal-containing solutions, pH, copper, nickel sulfate.
Pyrometallurgical Methods for the Production of Rare Metals and Analytical Analysis of Their Technological Properties
This article analyzes pyrometallurgical methods for processing rare metals, in particular, refractory and doubly refractory raw materials containing gold and silver. The technological characteristics, advantages and disadvantages of various pyrometallurgical technologies, including smelting on a matte, smelting in electric furnaces, calcination and direct pyrometallurgical processing processes, are considered. The results of the study show that high-temperature smelting processes can effectively concentrate rare metals on a collector matte, separate harmful components and extract gold and silver at a high level. The environmental safety of the process, the possibility of introducing waste-free technologies and factors for increasing processing efficiency are also highlighted. It is substantiated that the use of pyrometallurgical technologies is one of the economically and technologically promising directions in the complex processing of refractory gold-containing raw materials.
rare metals, pyrometallurgy, gold, silver, refractory raw materials, stein, electric furnace, melting, calcination, collector stein, metallurgical processing, ore, metal extraction, environmental safety.
Study of Methods for Recovering Zinc from Garzinc Waste Produced in Galvanization Plants
The article analyzed the composition of hard zinc waste generated at galvanizing enterprises and methods of recovering zinc from it. The physico-chemical properties of zinc and iron, which are the main components of garzink, were studied and pyrometallurgical and hydrometallurgical processing technologies were compared. The results of the study showed that re-extraction of zinc from gartzink waste not only increases economic efficiency, but also reduces the environmental burden of metallurgical enterprises.
garzinc, zinc, galvanization, secondary raw materials, pyrometallurgy, hydrometallurgy, waste processing.
Selective Recovery of Lithium from Spent Lithium-Ion Batteries via Vacuum Carbothermic Pretreatment and Controlled Carbonate Precipitation: Process Optimization and Mechanistic Study
The growing need for lithium-ion batteries has spurred an increase in the development of effective and selective lithium extraction methods from spent battery waste. In the current work, a combined method based on vacuum carbothermic pretreatment and controlled carbonate precipitation was designed for lithium selective extraction from spent lithium-ion batteries (LIBs). The vacuum carbothermic pretreatment technique was used in order to destabilize cathode materials (LiCoO₂, LiNiMnCoO₂, and LiFePO₄) and facilitate the separation of transition metals (Co, Ni, Mn) along with increasing lithium liberation into the solid–liquid phase. The following step was lithium selective recovery in the form of lithium carbonate (Li₂CO₃) by means of controlled precipitation via addition of sodium carbonate at optimized pH, temperature, and reaction time conditions. The effect of processing parameters on the efficiency of lithium recovery, purity, and phase composition of the products was thoroughly studied. The high purity of the recovered Li₂CO₃ and complete impurity metal ion removal were proved by means of XRD and ICP-OES characterization techniques.
Lithium-ion batteries; lithium recovery; vacuum carbothermic reduction; lithium carbonate precipitation; spent battery recycling; selective leaching; process optimization; circular economy; cathode material degradation; hydrometallurgical recovery
The Influence of Design and Performance Parameters on Improving the Efficiency of Air Cooling Units in the Oil and Gas Industry
In this article, the structural and operational factors aimed at increasing the heat exchange efficiency of air-cooled chillers were systematically analyzed. The influence of the geometry of finned tubes, air flow velocity, and tube location on heat exchange was analyzed in depth. It was also found that expanding the heat exchange surface using fins is effective, but it is necessary to take into account aerodynamic resistance. The results of the study substantiate the possibility of increasing energy efficiency by selecting optimal parameters in the design of air-cooled chillers. This work is of scientific and practical importance in improving heat exchange devices.
air-cooled chiller, heat exchange, heat transfer coefficient, finned tubes, optimization, air flow velocity, energy efficiency
Implementation Of The Process of Extracting the Main Organic Componentfrom The Composition Of The Oil Sludge
This article considers mechanical impurities, water content and organic components in oil sludge, as well as methods of their analysis. Special attention is paid to the study of the amount of organic acids. For this purpose, laboratory studies were carried out to determine the physicochemical characteristics of the feedstock. Samples of oil sludge obtained from Bukhara oil refinery were used as material for extraction of organic fraction. Analysis of oil sludge composition showed that they contain a significant amount of petroleum products, mainly consisting of heavy oil fractions. Based on the studies of group composition and physicochemical properties it was found that oil sludge from Bukhara oil refinery is a promising raw material for the isolation of the organic component.
oil products, oil sludge, mechanical impurities, colloidal system, dyna and starka, soxhlet.
Advantages and Prospects of Lithium-Iron-Phosphate (LiFePO₄) Batteries
This article investigates the structure, operating principle, key advantages, and application prospects of lithium iron phosphate (LiFePO₄, LFP) batteries. Based on a review of scientific literature and recent publications, the electrochemical properties, thermal stability, cycle life, and economic efficiency of LFP batteries were analyzed. The results indicate that LiFePO₄ batteries exhibit a high level of safety, long service life with 3,000–7,000 charge-discharge cycles, and improved environmental sustainability compared to many other lithium-ion battery technologies. Furthermore, the absence of expensive metals such as cobalt and nickel in the cathode material contributes to lower production costs and reduced dependence on critical raw materials. The study also demonstrates that LFP batteries are widely used in electric vehicles, renewable energy storage systems, telecommunication equipment, and backup power supplies. Future improvements in energy density and manufacturing technologies are expected to further expand the application areas of these batteries.
lithium iron phosphate, LiFePO₄, LFP battery, lithium-ion batteries, energy storage systems, electric vehicles, cathode materials, renewable energy.
Study of the Efficiency and Application of Froth Flotation in Separating Precious Metal Components from Oxidized Copper Ores
This study analyzes the technological possibilities of using the froth flotation method for the recovery of valuable components from oxidized copper ores. The efficiency of the flotation process was investigated in relation to its direct dependence on the physicochemical interactions occurring between solid mineral particles and gas bubbles in an aqueous medium. In addition, the effects of reagents used in the beneficiation of oxidized copper ores, as well as the fundamental principles governing the flotation process, were examined.
mineral raw materials, oxidized ores, froth flotation, interfacial boundary, ore beneficiation, galena, sphalerite, chalcocite, pyrite, sodium hydrosulfide (NaHS), sodium sulfide (Na₂S), methyl isobutyl carbinol (MIBC), ammonium sulfate ((NH₄)₂SO₄).
Study of the Main Properties of Nickel and Titanium-Based Memory Alloys
This article discusses the history of the development of Nitinol, a nickel–titanium-based alloy, its unique properties such as shape memory effect and superelasticity, its practical applications in various fields, and modern technologies for the production of this alloy.
Nitinol alloy, nickel, titanium, shape memory effect, superelasticity, corrosion resistance, deformation, shape recovery, materials science.
Experimental Setup for Producing Synthetic Fuel from Worn Tires
This article examines the process of producing synthetic fuel from worn-out tires using pyrolysis. The feedstock used was tires unfit for further use, pre-crushed into 120 mm² fragments. An experimental setup was developed for the process, including a pyrolysis reactor, collection tanks, a heat exchanger, a refrigerator, pressure gauges, valves, a pump, and a gas burner. During the experiment, 4.18 kg of worn-out tires were subjected to thermal decomposition at a temperature of approximately 500 °C. This resulted in the production of 1.8 liters of pyrolysis oil, 1.32 kg of carbon black, 0.6 kg of metal cord, and pyrolysis gas. The physicochemical properties of the pyrolysis oil, including density, viscosity, flash point, freezing point, and fractional composition, were studied. It was found that the maximum yield of the liquid product is achieved at a temperature of approximately 500 °C and a process duration of approximately 60 minutes. Pyrolysis oil was shown to contain aromatic hydrocarbons, alkenes, dienes, alkynes, and cycloalkanes, and fractional distillation can produce a light fraction in the 35–140°C range. These results confirm the feasibility of recycling used tires to produce valuable organic compounds and synthetic fuel components.
worn-out car tires, pyrolysis, synthetic fuel, pyrolysis oil, carbon black, metal cord, pyrogas, fractional distillation, hydrocarbons, aromatic compounds, thermal decomposition, waste recycling.
Optimization of the Technology of Hydrogenation of Benzene in the Participation of Nickel-Chrome Catalyst to Cyclohexane
This article discusses the process of optimizing the technology of cyclohexane production by hydrogenation of aromatic hydrocarbons formed during oil refining on an industrial scale.
cyclohexane, aromatic hydrocarbon, hydrogenation, benzene.
Development of a technology for producing liquid mineral fertilizer with Ca–K–N composition from cement clinker dust
This article studies the issue of developing a technology for obtaining liquid mineral fertilizer with a Ca–K–N composition from dust waste generated during clinker burning at cement plants. In the study, the chemical, mineralogical and granulometric composition of clinker dust was evaluated using XRF, XRD and physicochemical analysis methods. The results obtained indicate the presence of calcium oxide, potassium oxide, magnesium oxide and sulfate compounds in the dust, justifying its use as a promising secondary raw material for obtaining mineral fertilizer. It was determined that potassium, sulfate and chloride ions go into solution during aqueous extraction, and it was shown that the effective separation of calcium and magnesium requires an additional neutralization stage. As a result of neutralization with nitric acid, the pH value was brought to the range of 6.0–6.5 and a liquid mineral fertilizer containing nitrate nitrogen, calcium, potassium and magnesium was obtained. The product's storage stability and environmental safety indicators for heavy metals were also evaluated. The research results will allow for the recycling of cement industry waste, the effective use of local mineral resources, and the creation of an economically viable fertilizer product for agriculture.
cement clinker dust, CKD, liquid mineral fertilizer, Ca–K–N fertilizer, aqueous extraction, nitric acid neutralization, calcium, potassium, clinker dust processing, industrial waste, agrochemistry, environmental safety.
Investigation on the Impact of Mobile phones and Mobile apps in paddy cultivation in Ampara District
This study investigates the impact of mobile phones and mobile applications on paddy cultivation in the coastal divisions of Ampara District, Sri Lanka specifically Akkaraipattu, Ninthavur, and Addalaichenai. Although Information and Communication Technology (ICT) is widely recognised as a transformative force in agriculture, empirical evidence from Sri Lanka’s leading paddy producing region remains limited. To address this gap, the study adopted a quantitative research design and employed Structural Equation Modelling (SEM) to test the relationships between mobile phone usage (PU), mobile application usage (UOMA), and paddy production and the socio-economic level of farmers (PPSELOF). Primary data were collected from 388 paddy farmers through a structured questionnaire and analysed using SPSS and AMOS. Confirmatory Factor Analysis confirmed acceptable model fit (Normed χ² = 3.485, CFI = 0.981, RMSEA = 0.080). Path analysis revealed that both mobile phone usage (β = 0.366, p < 0.001) and mobile application usage (β = 0.289, p < 0.001) exerted statistically significant and positive effects on PPSELOF, supporting both hypotheses. The findings demonstrate that mobile technologies act as essential enablers of improved productivity, informed decision-making, and socio-economic advancement among rural paddy farmers. The study contributes context-specific empirical evidence to the discourse on digital agriculture in South Asia and offers practical implications for policymakers, extension officers, and technology developers seeking to design farmer-centred ICT interventions in Sri Lanka.
ICT in agriculture; mobile phones; mobile applications; paddy cultivation; Structural Equation Modelling; Ampara District; Sri Lanka.
Study and Assessment of the Impact of Air Pollution by Oil and Oil Products on the Human Body
The article scientifically analyzes the negative effects of petroleum products dispersed in atmospheric air on the human body. The adverse impact of gases, aerosols, and volatile organic compounds formed during the extraction and processing of petroleum on the respiratory, nervous, and cardiovascular systems is examined. It has been established that long-term exposure to these substances may lead to the development of various diseases, allergic conditions, and oncological risks. The results of the study indicate the need to develop preventive measures aimed at reducing atmospheric pollution and protecting public health. At the same time, the importance of improving and updating highly accurate analytical methods for continuous atmospheric air monitoring is emphasized.
petroleum products, atmospheric air, immune system, toxic effects, permissible limit, carcinogenic substance.
Development of Coconut Milk Based Yoghurt Enriched with Aloe Vera (Aloe Barbadensis Miller) and Hibiscus (Hibiscus Sabdariffa) Extracts
Lactose intolerance, vegan preferences and 0consumers on health-conscious diets looking for natural substitutes are driving up demand for dairy-free yoghurt substitutes. Coconut milk (Cocos nucifera), abundant in Sri Lanka which provides an ideal base with its creamy texture, potassium richness, fats, carbohydrates, vitamins, dietary fibers and bioactive compounds (flavonoids, phenols) that support Lactobacillus fermentation superior to traditional bases. This research developed and optimized coconut milk-based yoghurt enriched with aloe vera (Aloe barbadensis Miller) extract for antimicrobial properties and texture enhancement and hibiscus (Hibiscus sabdariffa) flower extract for natural anthocyanin coloring (cyanidin-3-sophoroside) and antioxidants. Aloe vera extract (0-20%) and fixed hibiscus extracts were added to coconut milk yoghurt. Physicochemical analysis were conducted by AOAC methods revealed that moisture content increased from 72.20-74.05%, ash from 0.22-0.29%, pH values decreased, while fat (2.06-1.26%) and sugars (14.90-13.60°Brix) decreased with the increase in aloe vera concentration. T3 (10% aloe vera) had the best flavor, texture, bluish-purple color and overall acceptability, according to a sensory analysis conducted by twenty trained panel members using a 7-point hedonic scale. The antimicrobial properties of aloe vera increased the refrigerated shelf life to seven days. The enhanced nutritional composition, improved physicochemical properties and high sensory acceptability of the coconut milk yoghurt fortified with Aloe vera and Hibiscus extracts make it suitable for use as a functional plant-based alternative to dairy milk based yoghurt, especially for lactose intolerant, dairy-allergic and vegan populations.
Aloe vera extract, Coconut milk yoghurt, Consumer preference, Hibiscus extract, Physio-chemical properties, Sensory attributes.
Technologies for the Recovery of Iron (Fe) and Vanadium (V) from Fly Ash Generated at Thermal Power Plants
This article presents a comprehensive analysis of the chemical composition of ash waste generated at thermal power plants and the technologies for extracting valuable metal elements, particularly iron (Fe) and vanadium (V). The study evaluates the efficiency of pyrometallurgical, hydrometallurgical, and combined processing methods based on recent scientific research. The results indicate that integrated roasting–leaching technology provides the highest extraction efficiency. In addition, a technological flow scheme is proposed, and the feasibility of its application under laboratory conditions is substantiated. The findings demonstrate that fly ash can be considered a promising secondary resource for the recovery of strategic metals.
fly ash, vanadium, iron, hydrometallurgy, pyrometallurgy, leaching, roasting, secondary raw materials, V₂O₅, metal recovery
Relationship Between Work-Based Learning Programs and Future Economic Output in Key Growth Sectors
This paper will look at the relationship between the work-based learning programs and the future economic development of major sectors. Work-based learning integrates theoretical knowledge with an industrial experience in the real world. It has turned into an education tactic in reaction to the demand of graduates prepared and eager to join the labor market. The research question is what is the effect of involvement in such programs on industry innovation, productivity, and skill development. It also examines the contribution of these factors towards the future economic performance in various sectors. The research will use quantitative research methods to gather the necessary data among the stakeholders in the chosen growth sectors to assess measurable outcomes in terms of employability, labor productivity and sectoral value addition. The targeted outcomes will demonstrate how work-based learning can enhance the competitiveness of the workforce, minimize skill mismatches, and accelerate economic growth. The study will offer evidence based knowledge that can be used to inform future modifications in education, vocational training, and industry alliances. It adds to the debate of how to balance learning systems with the labor market requirements.
Study Of Methods for Determining the Composition of Industrial Waste Oils and Purification
This article deals with the processing of industrial wastewater and the determination of the amount of petroleum oils in its content. The aim is to determine the initial composition of the oil in industrial waste.
wastewater, degreaser, petroleum oil, deasphalting.
Integrated Characterization and Sustainable Valorization of Zinc Galvanizing Flue Dust via Hydrometallurgical and Functional Material Routes
Hot-dip galvanizing flue dust (GFD) is a hazardous by-product generated during steel galvanizing processes, characterized by fine particle size, high zinc content, and complex chemical composition. Despite its relatively low generation volume, GFD represents a valuable secondary resource due to its zinc concentration reaching up to 45 wt.%. This study presents a comprehensive review of existing experimental investigations on the characterization, hydrometallurgical processing, and advanced material valorization of galvanizing flue dust. Detailed physicochemical analyses reveal that zinc is primarily present in chloride- and ammonium-based phases, which exhibit high reactivity in acidic leaching systems. Hydrometallurgical treatment using hydrochloric and sulfuric acids enables zinc recovery efficiencies exceeding 95% under optimized conditions, supported by thermodynamic feasibility analyses. Beyond conventional metal recovery, leachates derived from GFD have been successfully utilized as precursors for the synthesis of ZnO ceramic nanofibers via electrospinning and calcination. The influence of leaching media on nanofiber morphology is discussed, highlighting opportunities for tailoring material properties. These findings demonstrate that combining zinc recovery with functional material synthesis offers a sustainable, circular-economy-oriented pathway for minimizing hazardous waste disposal and enhancing resource efficiency in the galvanizing industry.
Circular economy; electrospinning; galvanizing flue dust; waste valorization; zinc recovery; ZnO nanofibers.
Research into the Process of Neutralization and Precipitation of Waste Solutions Generated in the Chemical Industry
The article studies the chemical composition of acidic and alkaline waste solutions generated in the chemical industry, and the possibilities of their mutual neutralization are investigated. The study of the precipitation process as a result of neutralization showed that it is possible to separate metals up to 98%.
chemical industry, metals, neutralization, precipitate composition, chemical analysis, technological.
Processing of Zinc Production Wastes and Recycling Opportunities
The generation of large volumes of waste during zinc production presents both an environmental challenge and a potential secondary resource for valuable metal recovery. This study investigates the physicochemical characteristics of zinc-containing wastes and evaluates effective processing methods for improving metal extraction efficiency. Special attention is given to the decomposition of zinc ferrite through lime-assisted roasting followed by sulfuric acid leaching. Thermodynamic analysis and experimental data indicate that the proposed approach significantly enhances zinc recovery compared to conventional methods. The results demonstrate that waste recycling can contribute to sustainable metallurgy and resource conservation.
zinc cake, zinc ferrite, waste recycling, hydrometallurgy, roasting, leaching, mineralogical analysis, zinc recovery.
Research on the Separation of Precious Metals from Zinc Production by-Product and Waste
The waste generated in the zinc production technology contains rare metals. This article studies the presence of indium, gallium, germanium, and cadmium in the intermediate products and clinker, and considers the possibilities of their extraction.
Zinc waste processing, clinker, well furnace, rare metals, hydrometallurgy, pyrometallurgy, magnetic separation, extraction, indium, germanium, gallium.
Study of Thermodynamic Calculations for Chloride Substance of Gold-Containing Magnetic Fraction
This article presents a thermodynamic analysis of all possible reactions occurring during chloride-sublimation roasting of a gold-bearing magnetic fraction. Based on this thermodynamic analysis, the necessity of oxidative roasting to convert iron into difficult-to-chlorinate oxides is demonstrated.
Magnetic fraction, reaction, process, thermodynamic analysis, temperature, research, gold, chlorine.
Study of the Possibility of Extracting Gold and Silver from the Magnetic Fraction
This article analyzes technologies for extracting gold and silver from the magnetic fraction generated during gold mining. The analysis suggests hydrochlorination and chloride sublimation processes for extracting precious metals from the magnetic fraction.
Gold, silver, magnetic fractionation, hydrochlorination, chloride removal, technological.
Studying the Characteristics of the Small Dust Formed During the Melting of Sulfide Copper Concentrate in a Vanyukov Furnace
This article examines the dust composition formed during the smelting of sulfide copper concentrate in the Vanyukov furnace, the need for its processing, existing problems, and proposed technological solutions. In particular, an effective technological scheme for processing finely dispersed dust obtained from an electrostatic precipitator at the Almalyk MMC copper smelting plant and directions for its complex separation have been substantiated.
Dust, gas, drying, electrolysis, neutralization, electrostatic precipitator, liquid bath, press filter, hydrometallurgy, processing, leaching.