Wyniki wyszukiwania - BazTech

1

Prace remontowe betonowych posadzek przemysłowych. Część II

Świątek-Żołyńska Sylwia, Niedostatkiewicz Maciej

Przegląd Budowlany

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2025

|

R. 96, nr 1

74--78

PL

Posadzki betonowe należą do elementów w obiektach budowlanych, których projektowanie wymaga doświadczenia inżynierskiego, wykonawstwo – zachowania reżimu technologicznego, natomiast podczas ich eksploatacji niezbędne jest prowadzenie remontów okresowych. Najczęściej wykorzystywane są jako przestrzeń robocza i komunikacyjna w obiektach przemysłowych. Niezależnie od miejsca wbudowania posadzki betonowe wymagają prowadzenia okresowych prac zabezpieczających, których zakres każdorazowo powinien być indywidualnie dostosowany do aktualnego bądź też planowanego do zmiany sposobu użytkowania obiektu. Niewłaściwy dobór technologii prac konserwacyjnych oraz niepoprawne stosowanie rozwiązań technologicznych związanych z renowacją posadzek mogą spowodować pogorszenie ich stanu technicznego, co może doprowadzić do konieczności ich wyłączenia z użytkowania, a to z kolei może skutkować koniecznością przerwy w użytkowaniu obiektu budowlanego, w tym obiektów produkcyjnych obiektów przemysłowych. W pracy przedstawiono zbiór praktycznych informacji związanych z prowadzeniem prac naprawczych betonowych posadzek przemysłowych. Artykuł ma charakter studium przypadku i odnosi się do konkretnych sytuacji związanych z utratą sprawności technicznej przez betonowe posadzki przemysłowe.

EN

Concrete floors are among the elements in construction facilities whose design requires engineering experience, execution requires maintaining the technological regime, while during their use, periodic repairs are necessary. They are most often used as work and communication spaces in industrial facilities. Regardless of the place of installation, concrete floors require periodic protective works, the scope of which should be individually adjusted to the current or planned change of use of the facility. Incorrect selection of maintenance technology and incorrect use of technological solutions related to the renovation of floors may result in deterioration of their technical condition, which may lead to the need to exclude them from use, which in turn may result in the need to interrupt the use of the construction facility, including production facilities of industrial facilities. The paper presents a set of practical information related to the conduct of repair works on concrete industrial floors. The paper is a case study and refers to specific situations related to the loss of technical efficiency of concrete industrial floors.

2

Wykorzystanie betonu w nowoczesnych projektach architektonicznych

Podgórski Bartłomiej

Materiały Budowlane

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2025

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nr 9

234--235

3

Stochastic Diagnostics of Tool and Workpiece Interaction

Bratan Sergey, Sága Milan, Yakimovich Boris, Bozek Pavol, Pokintelista Nikolay, Yakubov Chingiz

Management Systems in Production Engineering

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2025

|

nr 1 (33)

39--45

EN

Development is an integral part of research, since the study of specifics and characteristics in such a unique topic as the quality of processed products cannot be done without extraordinary equipment, fixtures and a laboratory. Laboratory equipment has been created that combines all hardware aspects of the development of the quality of processed products, where it analyzes the quality of workpieces that depend on the processing technology. However, this depends largely on the technological system used. The paper includes measurements, data acquisition and back-checking of the logic of the study of grinding operations. In the introduction, it must be shown that the correct selection and strength characteristics of the tool associated with the cutting mode of grinding determine the accuracy and quality of the surfaces of the ground part. The impact on the service life of the grinding tool was also monitored. The 4th partial result is also the knowledge that the correct selection of the tool characteristics and cutting mode predicts the quality of the workpiece surface. The operating conditions of the manufactured parts significantly affect the operating values of the production parameters. By appropriate diagnostics in the research process and precise measurements using sensitive sensors, deviations can be minimized. Without this apparatus, it is possible that deviations increase significantly during the operation of the technological system. The size of the deviation during grinding is explained in practice by the presence of vibrations in technological processes. They cause instability of the parameters of the technological system. To stabilize the quality indicators, a mathematical apparatus was also used, which takes into account changes in the technological regime. They are determined by designing adverse conditions, e.g. restoration of the cutting properties of a worn grinding wheel. Therefore, its replacement is logically carried out earlier than its replacement is planned.

4

Working parts for intensive crushing and grinding of feed from waste raw materials: A review

Iskakov Ruslan, Gulyarenko Alexandr, Hyla Paweł, Bembenek Michał

Advances in Science and Technology. Research Journal

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2025

|

Vol. 19, no. 7

98--131

EN

Processing of waste into feed involves the need to grind it. Therefore, the study of research on this problem is relevant. The study aims to summarize scientific data on developing working parts for grinding feed from waste. In this regard, we analyzed scientific publications. As a result, it was revealed that the trend in grinding feed raw materials is the use of all types of food production and agricultural waste. Ten types of plant waste from the food industry and seven types of animal waste are indicated. It was found that the main working parts for grinding feed are technical devices for cutting, impact, abrasive-crushing, splitting-breaking, and impact-cutting action. It was revealed that an evident trend is improving working parts for intensive grinding based on optimal design developments of working parts, increasing the efficiency of working surfaces and design and technological parameters, and combining several methods of destroying feed raw materials using one type of working part. In general, the disadvantages and advantages of saws (4 types), rollers and disks (7 types), hammers and knives (21 types), and shredder disk knives (4 types) are analyzed and summarized in tables.

5

Optimization of production processes and tool utilization in industrial grinding operations

Malega Peter, Daneshjo Naqib

Advances in Science and Technology. Research Journal

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2025

|

Vol. 19, no. 6

17--31

EN

This paper focuses on the optimization of production processes in a tool-room with a specific emphasis on grinding operations. The main objective is to identify and implement approaches that enhance production efficiency, minimize downtime, and reduce manufacturing costs. Through an analysis of the current state of production processes, key factors negatively affecting productivity were identified, including underutilization of tools and inefficient planning. The paper presents a methodology for evaluating the performance of production systems, which includes the use of the OEE (Overall Equipment Effectiveness) tool and workflow analysis. Based on the collected data, specific improvements were proposed, such as the introduction of modern tools, optimization of workflows, and the implementation of sensor-based predictive maintenance. These measures resulted in a significant reduction in production downtime and an increase in workplace productivity. The results demonstrate that the proper combination of technical innovations, effective planning, and monitoring of production processes can lead to significant improvements in the performance of production systems. The contribution of this study lies in providing practical solutions that can be applied across various industrial sectors while highlighting the importance of integrating modern technological tools into production processes. This article is valuable for professionals in industrial production, quality management, and operations engineering who seek effective strategies for optimizing production operations and increasing the competitive advantage of their enterprises.

6

Wpływ prędkości skrawania na cechy funkcjonalne powierzchni Inconelu 625 po obróbce szlifowaniem

Kopytowski Adrian

Przemysł Chemiczny

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2024

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T. 103, nr 11

1359--1362

PL

Przedstawiono wyniki badań doświadczalnych opisujących wpływ prędkości skrawania w procesie szlifowania Inconelu 625 na właściwości funkcjonalne obrabianych powierzchni i ich morfologię. Stwierdzono, że morfologia obrabianej powierzchni i jej cechy funkcjonalne zmieniały się wraz ze zmianą prędkości skrawania. Wzrost prędkości skrawania prowadził do poprawy właściwości funkcjonalnych powierzchni opisanych parametrami krzywej Abbotta i Firestone’a oraz chropowatości. Zaobserwowano lokalne optimum, dla którego dalsze zwiększenie prędkości skrawania nie prowadziło do istotnej zmiany wartości badanych parametrów.

EN

Inconel 625 samples were subjected to the grinding process at 3 levels of cutting speed (13, 23 and 33 m/s). Anal. of topographic features of the machined surfaces and their morphol. was carried out using a scanning profilometer and SEM. The evaluation of the functional properties of the machined surfaces was carried out by analyzing the parameters of the Abbott-Firestone surface curve. The morphol. of the machined surface and its functional properties changed with the change of cutting speed. The increase in cutting speed was accompanied by an improvement in the functional properties of the surface with a local optimum, for which a further increase in cutting speed did not lead to a significant change in the values of the tested parameters.

7

Analysis of Contact Wheel and Tool Interaction in Belt Grinding

Henning Julian Wolfgang, Uhlmann Eckart, Walter MIchael

Journal of Machine Engineering

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2024

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Vol. 24, No. 4

65--74

EN

The belt grinding process is gaining an increasing importance in the industrial sector. Due to its high flexibility regarding the range of workpiece materials and its adaptability to various, even geometrically complex workpiece shapes and designs, belt grinding has a broad field of applications. Typical application cases for this process include sealing surfaces on housing and engine parts, the production of camshafts and crankshafts as well as cylinders with high concentricity accuracy. Despite the extensive application of belt grinding in the manufacturing industry, the respective interactions between grinding belt and contact wheel of the process have not been holistically investigated. Therefore, this article focuses on the deformation of the contact wheel as well as the deformation during the interaction between the contact wheel and the grinding belt. This includes the flattening of the tool under grinding normal force Fn and deformation under centrifugal forces. The empirical data is intended to provide insights into the relationship between tool deformation and elastic effective depth of cut ae.

8

Materiałowe aspekty budowy narzędzi docierarek tarczowych do płaszczyzn

Barylski Adam

Inżynieria Materiałowa

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2024

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Vol. 45, nr 5

13--23

PL

Przedstawiono problematykę doboru materiałów na narzędzia w operacjach docierania i szlifowania powierzchni na obrabiarkach tarczowych. Scharakteryzowano stosowane materiały na tego typu narzędzia oraz wybrane konstrukcje tarcz do obróbki elementów płaskich i płasko-równoległych. Wskazano na korzystne zastosowanie żeliw sferoidalnych w aspekcie aktywizacji powierzchni czynnej docieraków ścierniwem. Przedstawiono analizę modelową aktywizacji docieraków z niestopowego żeliwa sferoidalnego. Omówiono opracowane konstrukcje narzędzi ścierno-metalowych oraz porównano docieranie luźnym ścierniwem i szlifowanie ściernicami segmentowymi na docierarkach tarczowych.

EN

The problem of selecting tool materials in lapping and surface grinding operations on disc machines was presented. The materials used for this type of tools and selected designs of discs for machining flat and flat-parallel elements were characterized. The advantageous use of ductile cast irons in the aspect of activating the active surface of lapping tools with abrasive was indicated. A model analysis of the activation of lapping tools made of unalloyed ductile cast iron was presented. The developed designs of abrasive-metal tools are discussed and lapping with loose abrasive and grinding with segmented grinding wheels on disc lapping machines was compared.

9

Szlifowanie na docierarkach sposobem zmniejszenia skażenia powierzchni ziarnami ściernymi w obróbce wykończeniowej

Barylski Adam

Dozór Techniczny

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2024

|

z. 2

s.9--14

PL

Głównym celem artykułu jest przedstawienie problematyki skażenia powierzchni mikroziarnami ściernymi na przykładzie docierania żeliwa sferoidalnego oraz wskazanie zalecanych metod oceny tego szkodliwego w aspekcie eksploatacyjnym zjawiska. Omówiono również, obecnie intensywnie rozwijany, sposób obróbki przez szlifowanie powierzchni płasko-równoległych na docierarkach dwutarczowych. Jak wykazały wcześniejsze badania, znacząco zmniejsza on skażenie powierzchni ścierniwem.

10

New layering strategy and the gradient microstructure distribution of surface metamorphic layer for 8Cr4Mo4V steel by grinding

Zhang Bohan, Liu Haitao, Zhang Mingliang, Dai Chuyan, Xie Zhenwei, Ma Xinxin, Sun Yazhou

Archives of Civil and Mechanical Engineering

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2024

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Vol. 24, no. 1

art. no. e42, 2024

EN

As high-alloy steel, 8Cr4Mo4V steel has been widely used in the field of high-speed aerospace bearings in recent years because of its excellent thermal strength, thermal fatigue, corrosion resistance, hardness, and thermal stability. In this article, the heat-treated high-strength tempered martensitic 8Cr4Mo4V steel is taken as the object of study with the investigation of advanced technology, such as X-ray diffractometer, scanning electron microscope, electron backscattered diffraction, etc. An in-depth and comprehensive discussion of the effects of different grinding parameters, such as depth, wheel linear velocity, cooling conditions, etc., on the microstructure of the surface metamorphic layer was carried out, and it was found that the surface metamorphic layer has an obvious microstructure gradient distribution. A new layering strategy for the metamorphic layers is proposed, from the surface to the interior in the following order: the large plastic deformation layer, the no acicular martensite layer, the mixed layer, and the matrix layer. Ultimately, the key to the formation of the large plastic deformation layer is the re-nucleation of surface austenite due to high temperatures, and the wheel assists the process of crystal orientation. Similarly, the mixed layer or the no acicular martensite layer appears as the tempered martensite reaches the phase transition temperature. The manufacturing parameters have a great influence on the gradient distribution of microstructure, and this study is intended to be a practical guide for the grinding of 8Cr4Mo4V steels.

11

The Influence of Gradation and Type of Abrasive Material on Strength of Adhesive Joints of Steel Sheets

Rudawska Anna, Penkała Piotr, Kozicka Zuzanna, Kowalska Karolina, Ťavodová Miroslava

Advances in Science and Technology. Research Journal

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2024

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Vol. 18, no. 6

341--350

EN

The purpose of the work is to present issues related to the influence of surface treatment on the strength of adhesive joints of C45 steel sheets by grinding based on experimental research. These issues were related to determining the impact of the gradation and type of abrasive material on the strength of adhesive joints of the steel sheets. The grinding was carried out manually using an angle grinder with a disc diameter of 125 mm and a rotational speed of 11,060 min-1, using abrasive materials with grains made of: ceramics, zirconium and electro-corundum with a gradation of P40, and sandpaper with grains made of electro-corundum with various grain sizes with three gradations P40, P220, P400 (according to European FEPA standards). To make the adhesive joints of steel sheets, the epoxy adhesive was used, which contains an epoxy resin based on bisphenol A and a triethyleneteramine curing agent. A profilographometer from Hommel - Etamic was used to determine selected 2D and 3D surface roughness parameters, and the strength tests of the steel sheets adhesive joints were performed on a ZWICK/ROELL Z150 testing machine. The analysis of the tests showed a significant impact of the surface treatment method on the attained shear strength of the steel sheets adhesive joints. Comparing the samples prepared with electrocorundum of the variable gradation, the tests exhibited that the samples prepared with P40 paper had the highest roughness, while samples prepared with P400 paper had the highest shear strength. Roughness analysis indicated that in the comparison group of samples prepared with abrasives of the various abrasive materials, ceramics showed the highest roughness parameters and the shear strength of the adhesive joints after this treatment.

12

The relationships between the kinetic grinding parameters with interstitial fillings and the liberation degree of a chromite ore

Umucu Yakup, Deniz Vedat, Gursoy Hakan Y., Tokcan Isıl, Arsoy Zeyni

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 5

art. no. 168254

EN

In this study, the relationships between the liberation degree and the kinetic breakage parameters of a chromite ore obtained from the Burdur (Türkiye) were examined under the laboratory conditions. Firstly, liberation degrees for chromite particles were determined by the particle counting method in a metal microscope for 4 different size groups. Secondly, the breakage parameter of chromite ore which was dry ground with a ball mill was obtained using standard test methods. Additionally, the model parameters were also determined for the fractional interstitial fillings (U) of the chromite sample. Thirdly, the kinetic grinding parameters were compared with the liberation degree of the chromite sample. As a result of the tests, a very good correlation was obtained with R2=0.998, and regression analysis in the grinding processing of the chromite ore was used to verify the validity of the relationship parameter of Si that was produced. To these, it was found that interstitial fillings (U=0.6, 0.8, 1.0, and 1.2) have an effect on the grinding.

13

Technological and economical investigation of glaze preparation using dry stirred media mill

Ergin Hasan, Yıldırım Yıldız, Çırpın Arife, Turgut Hatice, Kayacı Kağan

Physicochemical Problems of Mineral Processing

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2023

|

Vol. 59, iss. 5

art. no. 166261

EN

Ceramic tiles are the most common building material for floor and wall coverings in many countries. Glazed tiles are produced from mixture of frits and some additional raw materials applied on the surface of green tiles and subjected to a firing process. A new method of processing of glaze that is dry stirred media mill was investigated in a pilot grinding plant. The produced glaze particle size, shape and surface area are measured. The comparison was made with the product of conventional wet discontinue ball mills using the same wall tile glaze recipes. The results indicated that dry stirred media mill can provide product that have finer particle size distribution, more stable product compared to the conventional wet ball milling. The glaze thermal expansion and optical properties such as colour (L, a and b parameters) of the produced glazes were measured and comparison was also made in details. Finally, the microstructural characteristics of the produced glazes were determined using scanning electron microscopy (SEM). The results have shown that dry stirred media mill enhances glaze properties and process economy considerably.

14

Analysing the impact of cutting force and vibration on surface roughness in external cylindrical grinding of SKH2 steel

Hoang Long, Nguyen Linh Tuan

Journal of Machine Engineering

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2023

|

Vol. 23, No. 3

130--140

EN

The surface roughness of a part during external cylindrical grinding is directly impacted by cutting force and vibration, which are intermediate parameters. To improve the quality of finished parts, studying and controlling these parameters is essential. In this research, the Taguchi method combined with ANOVA analysis was utilized to analyse the effects of feed rate, cutting depth, and rotational speeds on cutting force and vibration amplitude. The test material used was SKH2 steel, which was heat-treated to a hardness of 60 HRC. The research aimed to investigate the relationship between cutting force, vibration, and surface roughness. The study concludes with an analysis of the influence of cutting force and vibration on the surface roughness of parts during external cylindrical grinding. The results show that as cutting force and vibration increase, the surface roughness of the workpiece in external grinding will also increase, and conversely when cutting force and vibration decrease, the surface roughness will decrease.

15

Mechanochemically Activated Shungite as an Additive to Improve Bitumen Characteristics

Zhambolova Ainur, Ongarbayev Yerdos, Kenzhegaliyeva Aliya, Abdikhan Dinmukhamed

Journal of Ecological Engineering

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2023

|

Vol. 24, nr 11

218--226

EN

One of the urgent problems of improving the quality of road surfaces is to improve the properties of bitumen used as binders. For this purpose, various modifiers are used, which are mainly obtained synthetically. Modification of bitumen with natural raw materials is favorable from an economic and environmental points of view. The modification of road oil bitumen with samples of shungite from the Koksu deposit (Kazakhstan) was carried out in the work. The shungite samples were previously crushed by mechanochemical activation to improve their surface and adhesive properties. As a result of modification with shungite, an increase in the softening temperature and a decrease in the extensibility and penetration of bitumen were observed. The optimal amount of added shungite turned out to be 1 mass %. The shungite of carbonate origin on a mineral basis is more favorable as a modifier compared to samples of shale origin.

16

The numerical techniques application in the ball mill comminution process modelling

Pawlos Witold, Dominiczak Przemysław

Cuprum : czasopismo naukowo-techniczne górnictwa rud

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2023

|

nr 1-2

47--53

EN

The preliminary results of comminution process numerical simulations have been presented in this paper. The numerical prediction has been based on discrete elements method (DEM) for solid modelling and smoothed particles hydrodynamics method (SPH) for modelling a continuous medium – liquid. The one way numerical coupling between solid and liquid has been applied. The ball mill working in production line in O/ZWR has been modelled. The considered ball mill is used to copper ore comminution process. The numerical calculations have been carried out for different mill rotation speed.

PL

W artykule przedstawiono wstępne wyniki numerycznych symulacji procesu rozdrabniania. Prognozowanie numeryczne zostało oparte na metodzie elementów dyskretnych (DEM), wykorzystanej dla modelowania cząstek stałych, oraz na metodzie symulacji hydrodynamicznej (SPH) dla modelowania w ośrodku ciągłym – ciecz. Zastosowano jednokierunkowe sprzężenie numeryczne pomiędzy fazą stałą a ciekłą. Młyn kulowy, zainstalowany w ciągu technologicznym ZWR, został wytypowany jako obiekt modelowania. Rozpatrywany młyn pracuje jako urządzenie rozdrabniające rudę miedzi. Obliczenia numeryczne przeprowadzono dla różnych prędkości obrotowych młyna.

17

Subsurface deformation and burr formation in nickel-based single-crystal superalloy under grinding

Liang Chunyou, Gong Yadong, Li Pengfei, Sun Jingyu, Jin Liya, Yin Guoqiang, Wen Xuelong, Bo Xin

Archives of Civil and Mechanical Engineering

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2023

|

Vol. 23, no. 2

art. no. e126, 2023

EN

Machined subsurface and burr of nickel-based single-crystal superalloys (SXs) were identified as a key factor to the aero-engine industrial requirements concerning high service performance and the precision of edge geometry, in particular the finishing operations as grinding. To clarify subsurface deformation behaviors and the mechanisms of burr formation when grinding SXs, first, the present investigation predicted slip stresses acting on slip systems in workpiece subsurface under grinding based on the theory of resolved shear stress in single crystal, and correlated theoretical possible slip traces with experimental observed slip band systems. Second, grinding experiments on nickel-based SXs with [00-1]/[010], [11-3]/[332], [-110]/[111] and [-1-1-1]/[-110] orientations were performed to determine the anisotropy deformational behaviors of workpiece subsurface. Lastly, the unreported free surface of burr was adopted to investigate the formation mechanisms for side burrs and exit burrs during grinding. Results show that subsurface deformation patterns present anisotropy and resolved shear stress contribute to slip in nickel-based SXs. High shear density layers/zones consisting of interacted slip bands are found in grinding-induced sub-surfaces. Slip induced plasticity is the dominant deformation mechanism in the formation process of side burrs and exit burrs in grinding of nickel-based SXs.

18

Kinetics of copper leaching from direct‑to‑blister copper flash smelting slag by sulfuric acid

Gargul Krzysztof, Boryczko Bożena, Handzlik Piotr, Noga Piotr, Palimąka Piotr

Archives of Civil and Mechanical Engineering

|

2023

|

Vol. 23, no. 1

art. no. e29, 2023

EN

Coppermaking from sulfide concentrates entails two major steps: smelting and converting. In continuous direct-to-copper smelting process these two steps are combined into one. The principal advantages of this process are: isolation of SO2 emission to a single, continuous, SO2-rich gas stream, minimization of energy consumption and minimization of capital and operating costs. Disadvantages of the process are that about 25% of the Cu entering a direct-to-copper smelting furnace ends up dissolved in the slag (when compared with < 10% in traditional Peirce-Smith converting) and the cost of recovering this Cu is significant. Decopperization process is based on the reduction of cuprous oxide and other metals, mainly lead and iron, in the liquid state in an electric furnace in the presence of coke and technological additives. This paper presents the results of laboratory tests on flash smelting slag leaching with sulfuric acid solutions. Hydrometallurgical treatment of the slag could be an alternative route to the presently used way of processing. The influence of a number of leaching parameters such as sulfuric acid concentration, amount of H2O2 added, liquid to solid phase (l/s) parameter and process temperature on the copper leaching efficiency was investigated. Under optimized process conditions, 95.6% of the copper contained in the original sample of slag was transferred into a solution. The experimental results obtained in the study were supplemented with the analysis of the kinetics of the copper leaching process from the flash smelting slag. The commonly known from the literature diffusion model and chemical reaction model were used. The activation energy of copper leaching from flash smelting slag was estimated in the range from 12.77 to 17.34 kJ/mol.

19

The latest innovations in wheat flour milling: a review

Dziki Dariusz

Agricultural Engineering

|

2023

|

Vol. 27, No. 1

147--162

EN

The milling process has evolved over time, employing various techniques to produce flour with different particle sizes and applications. This paper discusses the advancements in the wheat flour milling process and examines their impact on flour quality. The concept of wheat milling value is also introduced, which refers to the ability of wheat to produce flour with desirable properties and high yield. The importance of wheat cleaning in the milling process is highlighted, along with technological advancements such as color sorting machines and debranning of wheat grains before grinding, which facilitate efficient cleaning and increase flour yield. The progress of wheat conditioning in preparing wheat for milling is also discussed, along with current trends in grinding the wheat kernel. These advancements collectively contribute to enhancing flour quality, production efficiency, and overall milling performance.

PL

Sposób przemiału ziarna pszenicy ewoluował na przestrzeni ostatnich lat, poprzez wykorzystanie nowych technik, pozwalających na uzyskanie mąki o zmiennym składzie granulometrycznym i różnych zastosowaniach. W niniejszej pracy omówiono najnowsze trendy związane z produkcją mąki pszennej, analizując wpływ różnych metod i technologii na jej jakość. Omówiono także wartość przemiałową ziarna, pod kątem otrzymywania mąki o wysokim wyciągu i pożądanych właściwościach wypiekowych. Skupiono się również na innowacjach w procesie oczyszczania pszenicy, omawiając maszyny do sortowania ziarna względem barwy oraz urządzenia do obłuskiwania. Przeanalizowano także postęp w procesie kondycjonowania i rozdrabniania ziarna pszenicy. Wszystkie omówione innowacje przyczyniają się do poprawy jakości mąki oraz efektywności i wydajności produkcji mąki.

20

The effect of shape and roughness on flotation and aggregation of quartz particles

Guven Onur

Physicochemical Problems of Mineral Processing

|

2022

|

Vol. 58, iss. 6

art. no. 154021

EN

A combination of grinding and abrasion processes was applied to control the shape and roughness of quartz particles to investigate their roles in flotation recoveries and aggregation rates at different collector concentrations. The results showed that while the roundness values (Ro) of quartz particles varied in the range of 0.56-0.58 (Ro) at 480 and 1920 sec grinding, the roughness values of particles varied between 3.12-4.02 μm at 60 and 240 min abrasion. The flotation and aggregation tests showed while the flotation recovery increased from 31.3 % to 34.2 % in reverse proportion to their roundness values at 1x10-6 M DAH concentrations, a similar increasing trend from 34.1% to 38.1 % as a function of their roughness value from 3.12 μm to 4.02 μm. On the other hand, in the case of aggregation tests, while the turbidity values decreased from 40.6 NTU to 32.1 NTU at 1x10-6 M DAH concentrations for rounder particles, it was found as 36.2 NTU to 31.8 NTU for rougher ones. The overall results of this study indicated that tuning the morphology of quartz particles may be used to adjust both the flotation and aggregation rate of particles.