Journal ArticleDOI
Powder coating in a rotary mixer with rocking motion
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In this article, the authors investigated the mechanism of coating a coarse powder by a fine adhesive powder in a rotary-type mixer with rocking motion and found that the shearing and friction forces generated by the rotational movement of the mixer turned out to exert a strong and positive effect on the rate of coating.About:
This article is published in Powder Technology.The article was published on 1988-10-01. It has received 27 citations till now. The article focuses on the topics: Powder coating & Coating.read more
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Powder mixing: Some practical rules applied to agitated systems
TL;DR: In this article, the essential points to be examined for the treatment of solids mixing are reviewed and the definitions of the quality of a mixture, the mixing mechanisms, the possibilities for the choice of solid mixer, the experimental assessment of homogeneity and mixing indexes and the numerical simulation of mixing processes are reported.
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Quantitative in-line monitoring of powder blending by near infrared reflection spectroscopy
TL;DR: In this article, a method for quantitative in-situ measurements of the chemical content of powder mixtures is presented by means of near infrared spectroscopy (NIR) and a fiber-optic diffuse reflection probe inserted into the powder in the blender, determinations of the powder mixture content can be made during processing.
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Mechanism of the combined coating-mechanofusion processing of powders
TL;DR: In this article, the authors extended the mechanism of coating of a coarse granular material by a fine cohesive powder in a rocking-type mixer, presented in a previous publication, to the case of mixers with higher mechanical energy input, such as high-speed-stirred mixer and high-shear mill.
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A phenomenological study of a batch mixer using a positron camera
TL;DR: In this paper, the particle tracking of a large radioactive tracer particle has revealed information on the detailed flow behavior in the mixer, by determining not only axial, radial and angular locations but also axial and angular velocity distributions.
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The effect of random positioning on the packing of particles adhering to the surface of a central particle
TL;DR: In this paper, the average distance between the centers of two contiguous outer particles is found to be 4/3 times their diameter, and the corresponding number of randomly packed particles equals 1/λ2 (= 0.56) times the maximum possible (hexagonal-packed) number of particles which can adhere to a given central particle.
References
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Diffusional mixing in an ideal system
TL;DR: In this paper, a quantitative theory is presented which describes the mixing of two identical powders in a horizontal barrel mixer, and it is proposed that when two components are loaded end-to-end in a simple barrel mixers, mixing can occur only by diffusion.
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Stochastic diffusion model of non-ideal mixing in a horizontal drum mixer
TL;DR: In this paper, two parameters appearing in the Kolmogorov diffusion equation, the diffusion coefficient and drift velocity, have been determined from one-step tracer experiments, and their physical significances have been discussed.
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Powder mixing: theory and practice in pharmacy☆
TL;DR: The use of homogeneity assessment for mixer performance and for degree of mixing in pharmaceutical practice is described, and with cohesive materials, ordered mixing may be as important as randomisation for producing pharmaceutical mixtures.
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The Continuous Measurement of the Flow and Mixing Characteristics of Solid Particles in a Mixer Using an Optical Method
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Flow and Mixing Characteristics for a Rotary-type Solid Mixer with Rocking Motion
TL;DR: In this paper, three sets of optical fiber probes have been installed in the mixer vessel to investigate the flow and mixing characteristics of the solid mixer, and it has been shown that two different mixing rate coefficients φ1 and φ2 represent the different mechanisms, convective and shearing or diffusive mixing.