The Effect of Preparation Conditions on Microbubble Flotation Process of Ultra Clean Coal Using Box Behnken Design Model

The properties analyzing of flotation feed sample told that this fine coal sample is high-ash and hard-to-float coal slime. The ash reduction comparison of the step-by-step release flotation test with high intensity conditioning (HIC) or not, and the comparison of flotation test with HIC and adding depressant were made. The results showed that HIC can significantly improve the flotation effect for high-ash and hard-to-float coal slime. Comparing with the traditional step-by-step flotation process, if it meets the demand of ash content is 10.00% and 8.00%, the clean coal yield with HIC will increase 18 and 29 percentage points respectively; comparing with the effect of floatation adding depressant, HIC has more help to reduce the ash content and increase the yield of clean coal. In addition, HIC will save a lot of flotation reagents.

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Biogenic approach to synthesize rod shaped Gd 2 O 3 nanoparticles and its optimization using response surface methodology‐Box–Behnken design model

Biotechnology Progress ◽

10.1002/btpr.2823 ◽

2019 ◽

Vol 35 (4) ◽

Cited By ~ 1

Author(s):

Tammineni Venkata Surendra ◽

Selvaraj Mohana Roopan ◽

Maksudur R. Khan

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Design Model ◽

Box Behnken Design

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Biodegradation of pyrene by Pseudomonas sp. ISTPY2 isolated from landfill soil: Process optimisation using Box-Behnken design model

Bioresource Technology Reports ◽

10.1016/j.biteb.2019.100329 ◽

2019 ◽

Vol 8 ◽

pp. 100329 ◽

Cited By ~ 5

Author(s):

Swati ◽

Pooja Ghosh ◽

Indu Shekhar Thakur

Keyword(s):

Design Model ◽

Pseudomonas Sp ◽

Process Optimisation ◽

Box Behnken Design ◽

Soil Process

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Optimization of Coal Washery Tailings by Flotation Process

Energies ◽

10.3390/en12203956 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3956 ◽

Cited By ~ 1

Author(s):

Changliang Shi ◽

Gan Cheng ◽

Shengnan Wang

Keyword(s):

Inflation Rate ◽

Calorific Value ◽

Ash Content ◽

Cultivated Land ◽

Clean Coal ◽

Flotation Process ◽

Flotation Tailings ◽

Flotation Performance ◽

Coal Washery ◽

By Products

Flotation tailings are by-products of coal preparation plants, which do not only occupy cultivated land but also cause pollution. The high ash content and low calorific value of tailings limit their applications. Deashing is the precondition for the reutilization of flotation tailings. However, it is more difficult to remove ash content from flotation tailings compared with raw coal. Based on the analysis of coal properties, the flotation performance of different collectors was compared in this study. Flotation flows and the mechanism of depressants were explored. The optimized flotation conditions were as follows: pulp concentration of 100 g/L, inflation rate of 0.25 m3/(m2·min), collector (C4) dosage of 300 g/t, frother dosage of 500 g/t, and revolving speed of 2200 rpm. The ash content of clean coal was also reduced by adding a depressant. The flotation performance was best when the amount of sodium hexametaphosphate (used as the depressant) was 4 kg/t; the recovery of clean coal was 71.88%, and the ash content was 10.64%.

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Biodecolorization of azo dye Acid Black 24 by Bacillus pseudomycoides: Process optimization using Box Behnken design model and toxicity assessment

Bioresource Technology Reports ◽

10.1016/j.biteb.2019.100311 ◽

2019 ◽

Vol 8 ◽

pp. 100311 ◽

Cited By ~ 6

Author(s):

Naveen Kumar ◽

Surbhi Sinha ◽

Tithi Mehrotra ◽

Rachana Singh ◽

Simran Tandon ◽

...

Keyword(s):

Process Optimization ◽

Azo Dye ◽

Toxicity Assessment ◽

Design Model ◽

Box Behnken Design

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Interpretation of irradiation-induced changes in electron diffractograms and images of extinction contours at low temperatures

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111458 ◽

1984 ◽

Vol 42 ◽

pp. 268-269

Author(s):

E. Knapek ◽

H. Formanek ◽

G. Lefranc ◽

I. Dietrich

Keyword(s):

Low Temperatures ◽

Carbon Films ◽

Organic Crystals ◽

Wide Spread ◽

Lens System ◽

Preparation Conditions ◽

Thin Carbon ◽

Electron Diffractograms ◽

Diffraction Patterns ◽

Induced Changes

A few years ago results on cryoprotection of L-valine were reported, where the values of the critical fluence De i.e, the electron exposure which decreases the intensity of the diffraction reflections by a factor e, amounted to the order of 2000 + 1000 e/nm2. In the meantime a discrepancy arose, since several groups published De values between 100 e/nm2 and 1200 e/nm2 /1 - 4/. This disagreement and particularly the wide spread of the results induced us to investigate more thoroughly the behaviour of organic crystals at very low temperatures during electron irradiation.For this purpose large L-valine crystals with homogenuous thickness were deposited on holey carbon films, thin carbon films or Au-coated holey carbon films. These specimens were cooled down to nearly liquid helium temperature in an electron microscope with a superconducting lens system and irradiated with 200 keU-electrons. The progress of radiation damage under different preparation conditions has been observed with series of electron diffraction patterns and direct images of extinction contours.

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The 3-Dimensional Molecular Structure of the Actin Filament Revisited

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100119223 ◽

1985 ◽

Vol 43 ◽

pp. 480-481

Author(s):

U. Aebi ◽

R. Millonig ◽

H. Salvo

Keyword(s):

Actin Filament ◽

Supramolecular Assembly ◽

Specimen Preparation ◽

X Ray Diffraction ◽

Single Filament ◽

X Ray ◽

3 Dimensional ◽

Filament Diameter ◽

Preparation Conditions ◽

Apparent Diameter

To date, most 3-D reconstructions of undecorated actin filaments have been obtained from actin filament paracrystal data (for refs, see 1,2). However, due to the fact that (a) the paracrystals may be several filament layers thick, and (b) adjacent filaments may sustantially interdigitate, these reconstructions may be subject to significant artifacts. None of these reconstructions has permitted unambiguous tracing or orientation of the actin subunits within the filament. Furthermore, measured values for the maximal filament diameter both determined by EM and by X-ray diffraction analysis, vary between 6 and 10 nm. Obviously, the apparent diameter of the actin filament revealed in the EM will critically depend on specimen preparation, since it is a rather flexible supramolecular assembly which can easily be bent or distorted. To resolve some of these ambiguities, we have explored specimen preparation conditions which may preserve single filaments sufficiently straight and helically ordered to be suitable for single filament 3-D reconstructions, possibly revealing molecular detail.

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