Practice for Laboratory Preparation of Soil-Lime Mixtures Using Mechanical Mixer

2017 ◽  
Author(s):  
Keyword(s):  
Mechanical Mixer

Comparison of Emulsification in a Sieve Emulsification Mixer, Homogenizer and Mechanical Mixer

2020 ◽  
pp. 452-460
Author(s):  
Waldemar Szaferski ◽  
Dorota Siuta ◽  
Bożena Kukfisz ◽  
Krystian Czernek
Keyword(s):  
Mechanical Mixer

scholarly journals Karakteristik Reologi Komposit Serbuk Cangkang Kemiri dan Poliuretan

2019 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
Yovial Mahyoedin ◽  
Kurnia Harlina Dewi ◽  
Wenny Marthiana ◽  
Rizky Arman ◽  
Ridho Azhari
Keyword(s):  
Particle Size ◽  
Taguchi Method ◽  
Rheological Characteristics ◽  
Rotational Viscometer ◽  
Stirring Time ◽  
Mechanical Mixer

AbstrakPenelitian ini bertujuan menentukan karakteristik reologi komposit serbuk cangkang kemiri (SCK) berukuran 45µm<d<75µm dan resin Poliuretan (PU) dengan komposisi bervariasi, yaitu 5%:95%, 10%:90%, 15%:85%. Pencampuran SCK dan PU dilakukan dengan mechanical mixer dengan kecepatan dan lama pengadukan masing-masing 10, 15 dan 20 menit dan 100, 200 dan 250 rpm. Reologi komposit diperoleh dengan pengujian rotational viscometer dan dioptimasi dengan metoda Taguchi. Penelitian menunjukkan viskositas terkecil 218,66 mPa.s, ditemukan pada komposit dengan komposisi 5% 95%, waktu pengadukan 15 menit dan kecepatan pengadukan 100 rpm.  Kata kunci: Serbuk cangkang kemiri, Poliuretan, Viskositas, Reologi.  Abstract This study aimed to determine the composite rheological characteristics of candlenut shells (SCK) with particle size of 45µm <d <75µm and polyurethane (PU) resins with varying compositions, namely 5%: 95%, 10%: 90%, 15%: 85%. Mixing of SCK and PU is carried out using mechanical mixers with a speed and stirring time of 10, 15 and 20 minutes and 100, 200 and 250 rpm, respectively. Composite rheology was obtained by rotational viscometer testing and optimized by the Taguchi method. The results showed the smallest viscosity of 218.66 mPa.s, found in composites with a composition of 5% 95%, stirring time of 15 minutes and stirring speed of 100 rpm. Keywords: candlenut shell, polyurethane, viscosity, rheology

Anaerobic Waste Water Treatment in a Carrier Assisted Sludge Bed Reactor

1983 ◽  
Vol 15 (8-9) ◽  
pp. 233-246 ◽  
Author(s):  
L Martensson ◽  
B Frostell
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Sugar Industry ◽  
Tap Water ◽  
Waste Water Treatment ◽  
Organic Load ◽  
Industry Waste ◽  
Solids Concentration ◽  
The Difference ◽  
Mechanical Mixer

A 40 1 tank reactor, filled to 3 % (v·v−1) with a small size (5-25µm) carrier material and equipped with a mechanical mixer, was used to create a sludge bed system for anaerobic waste water treatment. Solids leaving the tank with the effluent were recycled to the tank from an external settler. Two different substrates were used, fodder molasses diluted with tap water and beet sugar factory waste water. Influent concentrations were 9.3 g COD·1−1 and 4-7 g COD·1−1 respectively, and treatment was performed at 35-37 °C. With the synthetic molasses waste water, an organic load of 5-6 kg COD·m−3·d−1 could be tolerated, with the sugar industry waste water 25 kg COD·m−3·d−1. The difference in loading capacity was ascribed to different types of sludges formed, the molasses waste water resulting in a much more bulky sludge and a lower attainable volatile suspended solids concentration. It was concluded that much care must be exercised before designing sludge bed systems for high loads with unhydrolyzed waste waters.

A Study of Polyvinyl Butyryl Based Binder System in Titanium Based Metal Injection Moulding

2012 ◽  
Vol 520 ◽  
pp. 167-173 ◽  
Author(s):  
G. Thavanayagam ◽  
De Liang Zhang ◽  
K.L. Pickering ◽  
Stella Raynova
Keyword(s):  
Thermal Analysis ◽  
Injection Moulding ◽  
Twin Screw Extruder ◽  
Metal Powders ◽  
Binder System ◽  
Mixing Conditions ◽  
Screw Extruder ◽  
Metal Injection Moulding ◽  
Twin Screw ◽  
Mechanical Mixer

Metal injection moulding (MIM) is an innovative injection moulding technique widely used to produce complex shaped components from feedstock composed of metal powders and thermosetting or thermoplastic binders. In MIM, binder selection and formulation are considered as critical processes since binder characteristics dictate the success of MIM. The purpose of this study is to determine the feasibility of polyvinyl butyryl (PVB) based binder system in Ti-6Al-4V(wt.%)/binder feedstock, as well as to understand the effects of key parameters, such as powder loading and mixing conditions on the rheological properties of a feedstock. In this study, PVB, polyethylene glycol (PEG), and stearic acid (SA) were chosen to formulate a multi-component binder system to prepare Ti-6Al-4V based feedstock with the aid of three types of mixers: a compounder, a modified mechanical mixer and a twin screw extruder. Further, morphological analysis was performed using optical microscopy and scanning electron microscopy. Thermal analysis was performed using simultaneous differential thermal analysis and thermogravimetric analysis. Results showed that binder formulation was reasonably successful with the aid of both mechanical mixer and a twin screw extruder under certain mixing conditions, and the critical powder loading was 68 vol.%, resulting in an optimum powder loading of 63 vol.% .

Fabrication and Mechanical Properties of Glass Fiber/Epoxy Nanocomposites

2006 ◽  
Vol 505-507 ◽  
pp. 37-42 ◽  
Author(s):  
Jia Lin Tsai ◽  
Jui Ching Kuo ◽  
Shin Ming Hsu
Keyword(s):  
Mechanical Properties ◽  
Shear Stress ◽  
Shear Strength ◽  
Glass Fiber ◽  
Shear Failure ◽  
Epoxy Nanocomposites ◽  
Plane Shear ◽  
Epoxy Nanocomposite ◽  
Transverse Normal Stress ◽  
Mechanical Mixer

This research is aimed to fabricate glass fiber/epoxy nanocomposites containing organoclay as well as to understand the organoclay effect on the in-plane shear strength of the nanocomposites. To demonstrate the organoclay effect, three different loadings of organoclay, were dispersed in the epoxy resin using mechanical mixer followed by sonication. The corresponding glass/epoxy nanocomposites were prepared by impregnating the organoclay epoxy mixture into the dry glass fiber through a vacuum hand lay-up process. Off-axis block glass/epoxy nanocomposites were tested in compression to produce in-plane shear failure. It is noted only the specimens showing in-plane shear failure mode were concerned in this study. Through coordinate transformation law, the uniaxial failure stresses were then converted to a plot of shear stress versus transverse normal stress from which the in-plane shear strength was obtained. Experimental results showed that the fiber/epoxy nanocomposite exhibit higher in-plane shear strength than the conventional composites. This increased property could be ascribed to the enhanced fiber/matrix adhesion promoted by the organoclay.

Processing of Silicas Formed by Slip Casting

2014 ◽  
Vol 775-776 ◽  
pp. 525-528 ◽  
Author(s):  
Sabrina Arcaro ◽  
João Batista Rodrigues Neto ◽  
Francielly Roussenq Cesconeto ◽  
Jaime Domingos Teixeira ◽  
Fabiano Raupp-Pereira ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Silica Gel ◽  
Amorphous Silica ◽  
Slip Casting ◽  
Rheological Characterization ◽  
Volume Percentage ◽  
Silica Fibers ◽  
Mechanical Mixer

In this work suspensions containing natural amorphous silica fibers (NASF), amorphous silica gel and nanometric colloidal amorphous silica were prepared and rheologically analyzed. The suspensions were prepared by varying the volume percentage of solids between 22 and 32%, ammonium polyacrylate (APA), as dispersant, from 0 to 5% and polyvinyl alcohol (PVA), as binder, between 1 and 3.5%. The mixtures were obtained in a propeller mechanical mixer and formed by slip casting. The results of rheological characterization indicated that the suspensions with 30% solids, 4% dispersant and 3% binder were those that showed a stable rheological system and suitable for processing by slip casting.

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