COMPARATIVE ASSESSMENT OF TECHNOLOGIES FOR THICKENING GOLD-BEARING FLOTATION CONCENTRATES AND RECOVERING CLARIFIED PROCESS WATER: A LITERATURE REVIEW
This article presents a comparative literature review of technologies for thickening gold-bearing flotation concentrates and recovering clarified process water. The approaches examined include conventional and high-rate thickening, optimisation of flocculation conditions and feedwell hydrodynamics,...

Actual problems in modern technical sciences / 2026 / August

Omonov Ahmat Sherali ugli, Parmonov Sarvar Toshpulatovich, Ubaydullaev Mamasidik Makhammatsolievich

Volume 10 | Issue 8

3 August 2026, 22:03

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CURRENT STATUS AND FUTURE PROSPECTS OF TECHNICAL-GRADE SELENIUM PURIFICATION TECHNOLOGIES: A CRITICAL REVIEW
This review examines the current status and future prospects of technical-grade selenium purification technologies based on published scientific literature. The physicochemical principles and technological capabilities of vacuum distillation, fractional crystallization, zone refining, and combined...

Actual problems in modern technical sciences / 2026 / August

Odilov Akrom Olimjonivich, Parmonov Sarvar Toshpulatovich, Ubaydullaev Mamasidik Makhammatsolievich

Volume 10 | Issue 8

3 August 2026, 22:02

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HYDROMETALLURGICAL EXTRACTION OF MARGANESE FROM LOW AND MIDDLE-SIZE MARGANESE ORES
In Uzbekistan, a significant portion of manganese ores is of low and medium composition and is distributed across the Dautash, Kyzylbayrak, Takhtakarachin, Alisai, and Karatau regions. Existing geological data indicate that Dautash and Kyzylbayrak are volcanogenic-sedimentary, while Alisai belongs...

Actual problems in modern technical sciences / 2026 / July

Parmonov Sarvar Toshpulatovich, Mirzavaliev Dostonbek Bakhodir Ugli, Muzafarova Nafisa Madrakhimovna

Volume 10 | Issue 7

3 July 2026, 22:06

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WORLD PRACTICE AND MODERN TECHNOLOGICAL APPROACHES TO EXTRACTING MARGANES FROM MARGANES-CONTAINING RAW MATERIALS
This review article analyzes global practices for extracting manganese from manganese-containing ores, ferroalloy dust, electrolytic manganese residues, and battery raw materials. Pyrometallurgy, sulfate hydrometallurgy, reduction smelting with oxalate and other organic reducing agents, reduction...

Actual problems in modern technical sciences / 2026 / July

Parmonov Sarvar Toshpulatovich, Mirzavaliev Dostonbek Bakhodir Ugli, Muzafarova Nafisa Madrakhimovna

Volume 10 | Issue 7

3 July 2026, 22:05

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EXTRACTION OF MANGANESE FROM STEEL PRODUCTION SLAG
Manganese is a crucial element in the production of ferroalloys and steel. The process of extracting manganese from ores and slags faces numerous technological and environmental challenges, including high energy consumption and metal losses. This paper examines the main methods of manganese...

Actual problems in modern technical sciences / 2024 / November

Mirzavaliyev Dostonbek Bakhodir Ugli, Parmonov Sarvar Toshpulatovich

Volume 8 | Issue 11

3 November 2024, 21:50

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DEVELOPMENT OF A TECHNOLOGY FOR OBTAINING MANGANESE FROM WASTE
In this work, the optimal conditions for the extraction of manganese from manganese-containing slags by sulfuric acid leaching were studied. Studies have shown that adding iron powder and iron sulfate to the reaction mixture increases manganese extraction from 45% to 52%, making the process more...

Actual problems in modern technical sciences / 2024 / November

Parmonov Sarvar Toshpulatovich, Mirzavaliyev Dostonbek Bakhodir Ugli

Volume 8 | Issue 11

3 November 2024, 21:50

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INVESTIGATING THE IMPACT OF ULTRADESPERSE TITANIUM CARBIDE AND TUNGSTEN CARBIDE NANOPOWDER QUANTITY ON THE DENSITY, HARDNESS, AND FLEXURAL STRENGTH OF TUNGSTEN-COBALT CARBIDE-BASED HARD ALLOY SAMPLES
This article presents the results of studies to determine the influence of the amount of modifiers on the physical and mechanical properties of hard alloy samples based on tungstencobalt carbide. Ultrafine nanopowders of titanium carbide and tungsten carbide were chosen as modifiers. The influence...

Actual problems in modern technical sciences / 2024 / May

Sharipov Kongratbay Avezimbetovich, Parmonov Sarvar Toshpulatovich, Mirzavaliyev Dostonbek Bakhodir Ugli, Firuza Makhmudova Mukhtor Kizi

Volume 8 | Issue 5

3 May 2024, 21:50

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DEVELOPMENT OF CLEANING TECHNOLOGY OF TUNGSTEN CARBIDE POWDER OBTAINED BY ELECTROLYSIS IN ARGON ENVIRONMENT
The article presents the results of studies on the purification of sludge obtained by converting waste tungsten carbide and cobalt hard alloys into a cobalt solution with electrolysis to the state of pure tungsten carbide powders. Conducted scientific and practical studies show that the original...

Actual problems in modern technical sciences / 2024 / May

Sharipov Kongratbay Avezimbetovich, Parmonov Sarvar Toshpulatovich, Ubaydullaev Mamasidik Maxammatsolievich, Pattayeva Zilola Sanjar Kizi

Volume 8 | Issue 5

3 May 2024, 21:50

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TECHNOLOGY OF PRODUCING TUNGSTEN CARBIDE NANOPOWDER BY SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS (SHS) METHOD
The article presents the results of research on the production of nanopowders by synthesizing tungsten carbide powders obtained from waste tungsten carbide-cobalt hard alloy in countercurrent filtration mode. The conducted scientific and practical studies show that with an increase in the amount of...

Actual problems in modern technical sciences / 2024 / April

Parmonov Sarvar Toshpulatovich, Ubaydullaev Mamasidik Maxammatsolievich, Mirzavaliyev Dostonbek Bakhodir Ugli, Pattayeva Zilola Sanjar qizi

Volume 8 | Issue 4

3 April 2024, 21:50

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DEVELOPMENT OF IMPROVED CONSTRUCTION OF SCREW CONVEYOR COMPONENTS AND CALCULATION OF PARAMETERS
The screw conveyor performs a rotational movement when transporting the product along the screw conveyor, its improved design is being developed, and according to the results of scientific research, it is recommended as an important innovation in production. The essence of the work is that on screw...

Actual problems in modern technical sciences / 2021 / March

Juraev Nodirbek Normuradovich, Juraev Anvar Djuraevich, Parmonov Sarvar Toshpulatovich

Volume 5 | Issue 5

3 March 2021, 23:56

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