ROBUST SIEVE ANALYSIS USING SIEVE-BY-SIEVE METHOD

A new fast measuring method for process optimization of sucrose crystallization using image analysis based on high quality images and algorithms is introduced. With the mobile, non-invasive at-line system all steps of the sucrose crystallization can be measured to determine the crystal size distribution. The image analysis system is easy to operate and is as well an efficient laboratory solution with user-friendly and customized software. In comparison to sieve analysis, image analyses performed with the ParticleTech Solution have been proven to be reliable.

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Zeolite Tuff and Recycled Ceramic Sanitary Ware Aggregate in Production of Concrete

Sustainability ◽

10.3390/su11061782 ◽

2019 ◽

Vol 11 (6) ◽

pp. 1782 ◽

Cited By ~ 4

Author(s):

Jacek Szulej ◽

Paweł Ogrodnik ◽

Beata Klimek

Keyword(s):

Phase Composition ◽

Bimodal Distribution ◽

Sanitary Ware ◽

Ceramic Ware ◽

Sieve Analysis ◽

Production Plant ◽

Concrete Production ◽

Aluminous Cement ◽

Ceramic Sanitary Ware ◽

The Impact

The article presents the results of research on the use of ceramic ware waste as aggregate in concrete production. Four concrete mixtures with aluminous cement were prepared, each with a different admixture of clinoptilolite. The only used aggregate was crushed waste ceramic sanitary ware obtained from a Polish sanitary fixture production plant. As part of the studies, a compressive test of cubic samples at different curing times ranging from 7 to 90 days was performed. Prior to the preparation of the samples, a sieve analysis and an elemental analysis of the obtained aggregate were conducted. In the framework of the testing, the bimodal distribution of clinoptilolite grains was determined, as well as its chemical composition. The conducted compressive tests demonstrated high strength of concrete containing ceramic aggregate and aluminous cement with an addition of clinoptilolite. In order to determine the impact that adding zeolite exerts on the phase composition and the structure of concrete samples, an analysis of the phase composition (XRD) and scanning electron microscopy examination (SEM) were performed. Furthermore, tests of abrasion, water penetration under pressure and frost resistance were conducted, determining particular properties of the designed mixtures. The abrasion tests have confirmed that the mixtures are highly abrasion-resistant and can be used as a topcoat concrete layer. The conducted tests of selected properties have confirmed the possibility of using waste ceramic cullet and a mineral addition of clinoptilolite in concrete production.

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Evaluation of Marblewood Dust’s (Marmaroxylon racemosum) Effect on Ignition Risk

Applied Sciences ◽

10.3390/app11156874 ◽

2021 ◽

Vol 11 (15) ◽

pp. 6874

Author(s):

Miroslava Vandličkova ◽

Iveta Markova ◽

Katarina Holla ◽

Stanislava Gašpercová

Keyword(s):

Particle Size ◽

Dust Particles ◽

Wood Dust ◽

Sieve Analysis ◽

Granulometric Analysis ◽

Analysis Measurement ◽

Risk Research ◽

Minimum Ignition Temperature ◽

The Impact

The paper deals with the selected characteristics, such as moisture, average bulk density, and fraction size, of tropical marblewood dust (Marmaroxylon racemosum) that influence its ignition risk. Research was focused on sieve analysis, granulometric analysis, measurement of moisture level in the dust, and determination of the minimum ignition temperatures of airborne tropical dust and dust layers. Samples were prepared using a Makita 9556CR 1400W grinder and K36 sandpaper for the purpose of selecting the percentages of the various fractions (<63, 63, 71, 100, 200, 315, 500 μm). The samples were sized on an automatic vibratory sieve machine Retsch AS 200. More than 65% of the particles were determined to be under 100 μm. The focus was on microfractions of tropical wood dust (particles with a diameter of ≤100 µm) and on the impact assessment of particle size (particle size <100 µm) on the minimum ignition temperatures of airborne tropical dust and dust layers. The minimum ignition temperature of airborne marblewood dust decreased with the particle size to the level of 400 °C (particle size 63 μm).

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Behavior of copper and lead during mineralurgical and hydrometallurgical processing of flash smelting slag

Archives of Civil and Mechanical Engineering ◽

10.1007/s43452-021-00184-9 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Krzysztof Gargul ◽

Bożena Boryczko ◽

Andżelika Bukowska ◽

Adam Hołda ◽

Stanisław Małecki ◽

...

Keyword(s):

Reduction Process ◽

Copper Slag ◽

Original Method ◽

Flash Smelting ◽

Sieve Analysis ◽

Selective Enrichment ◽

Hydrometallurgical Processing ◽

Useful Components ◽

Smelting Slag ◽

The Many

AbstractThere are only a few smelters processing copper concentrates directly into blister copper. Despite the many advantages of this process, a serious challenge of this technology is the need to process the resulting flash smelting slag. It contains 12–15% copper and 2.5–4% lead. In this form, it cannot be considered as waste material and, therefore, a high-temperature reduction process is carried out. This decopperization process is energy- and time-consuming. The use of mineralurgical and hydrometallurgical processes, selective enrichment of the appropriate slag fractions in copper and lead, followed by its hydrometallurgical processing and recovery of Cu and Pb could be an interesting supplement to the methods used so far. The article presents results of research on the possibility of separation of useful components from copper slag using the original method of sieve analysis, gravitational enrichment and magnetic separation. Preliminary results of tests were made on a laboratory scale. Then, selective leaching of copper and lead from flash smelting slag was carried out, obtaining very promising results.

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Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

Energies ◽

10.3390/en12101999 ◽

2019 ◽

Vol 12 (10) ◽

pp. 1999 ◽

Cited By ~ 3

Author(s):

Skoczylas Norbert ◽

Anna Pajdak ◽

Katarzyna Kozieł ◽

Leticia Teixeira Palla Braga

Keyword(s):

Coal Mine ◽

Effective Diffusion ◽

Measurement Data ◽

Sorption Isotherms ◽

Sieve Analysis ◽

Measurement Systems ◽

Upper Silesian Coal Basin ◽

Tectonic Disturbances ◽

Concentration Changes ◽

Time Courses

The goal of this paper is to analyze the phenomenon of gas emission during a methane and coal outburst based on the unipore Crank diffusion model for spherical grains and plane sheets. Two occurrences in the Upper Silesian Coal Basin were analyzed: an outburst in a Zofiówka coal mine in 2005 and an outburst in a Budryk coal mine in 2012. Those two outbursts differed considerably. The first one was connected with an unidentified tectonic disturbance in the form of a triple, interlocking fault, and the other one is an example of an outburst in an area free from tectonic disturbances. The model analysis required laboratory tests in order to determine the sorption properties of coals from post-outburst masses. Sorption isotherms and the values of the effective diffusion coefficient were specified. The post-outburst masses were subjected to sieve analysis and the grain composition curves were plotted. The researchers also used the measurement data provided by proper mine services, such as the methane content, the volume of post-outburst masses, and the time courses of CH4 concentration changes in excavations. They were recorded by methane measurement systems in the mines.

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Factors Influencing the Particle Size Distribution in an Abrasive Waterjet

Journal of Engineering for Industry ◽

10.1115/1.2899714 ◽

1991 ◽

Vol 113 (4) ◽

pp. 402-411 ◽

Cited By ~ 13

Author(s):

T. J. Labus ◽

K. F. Neusen ◽

D. G. Alberts ◽

T. J. Gores

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Cutting Speed ◽

Target Material ◽

Abrasive Waterjet ◽

Sieve Analysis ◽

Size Distributions ◽

Mixing Process ◽

Jet Mixing

A basic investigation of the factors which influence the abrasive jet mixing process was conducted. Particle size analysis was performed on abrasive samples for the “as-received” condition, at the exit of the mixing tube, and after cutting a target material. Grit size distributions were obtained through sieve analysis for both water and air collectors. Two different mixing chamber geometries were evaluated, as well as the effects of pressure, abrasive feed rate, cutting speed, and target material properties on particle size distributions. An analysis of the particle size distribution shows that the main particle breakdown is from 180 microns directly to 63 microns or less, for a nominal 80 grit garnet. This selective breakdown occurs during the cutting process, but not during the mixing process.

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Test Method for Rubber ChemicalsWet Sieve Analysis of Sulfur

10.1520/d4572-21 ◽

2021 ◽

Author(s):

Keyword(s):

Test Method ◽

Sieve Analysis

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Experimental Assessment of Strength Parameters of River Sand for Sandcrete Block Production

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.53.67 ◽

2021 ◽

Vol 53 ◽

pp. 67-75

Author(s):

Babatunde Ogunbayo ◽

Clinton Aigbavboa ◽

Opeoluwa Akinradewo

Keyword(s):

Compressive Strength ◽

Quality Standard ◽

Sieve Analysis ◽

Building Structures ◽

Strength Parameters ◽

River Sand ◽

Sieve Analyses ◽

Aggregate Material ◽

Average Compressive Strength ◽

Minimum Quality

Sandcrete block is a vital building material used in the construction of building structures. The sandcrete blocks are produced by different manufacturers using river sand obtained from different locations as aggregate material without recourse to the minimum quality standard for the blocks produced. The study assessed the strength parameters of river sand used as an aggregate material in block production to determine its quality and suitability in relation to the strength of block produced. Three (3) block manufacturing sites in Nigeria were visited and 27 (twenty-seven) blocks of size 450 mm x 225 mm x 225 mm were selected randomly from the sites. The properties of the river sand was analyzed through sieve analyses, bulk density, silt content and water absorption while the compressive strength of the blocks was also tested. The result of sieve analysis of the river sand used in block production for this study all satisfied the particle size requirements of BS EN 933-1:1997 for general construction work including block production. The result of the study also shows that blocks produced with the river sand after 28days have an average compressive strength of 1.23 N/mm2 (SW), 1.54 N/mm2 (SE) and 1.95N/mm2 (NE). The study, therefore, concluded and recommended that regulatory and professional bodies in partnership with relevant associations should organize seminars for producers of sandcrete blocks on the best practices involved in producing quality sandcrete blocks.

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