A review of characterization techniques of heterocoagulation between mineral particles in mineral separation process

2021 ◽  
pp. 119699
Author(s):  
Pengfei Hu ◽  
Qiang Li ◽  
Long Liang
Keyword(s):  
Separation Process ◽  
Mineral Separation ◽  
Mineral Particles ◽  
Characterization Techniques

Multiple Imputation for Missing Data in Life Cycle Inventory

2009 ◽  
Vol 610-613 ◽  
pp. 21-27 ◽  
Author(s):  
Yu Liu ◽  
Xian Zheng Gong ◽  
Zhi Hong Wang ◽  
Wei Liu ◽  
Zuo Ren Nie
Keyword(s):  
Missing Data ◽  
Multiple Imputation ◽  
Separation Process ◽  
Iron Production ◽  
Validity And Reliability ◽  
Environmental Loads ◽  
Mineral Separation ◽  
Standard Procedures ◽  
Plausible Values

The major environmental loads of mineral separation process in China iron production (with missing data) are analyzed. And the inner relationship between these loads data is qualified and the missing data are imputed using a statistic method called multiple imputation (MI), aimed to improve the quality of LCA datasets and allow industry to easily conduct a highly reliable LCA. By using computer simulation, MI replaces each missing value with a set of plausible values which represent the uncertainty of the missing data. The multiply imputed datasets are then analyzed by the standard procedures for completing data and combining the results from these analyses. The result proves that MI Method is an effective and reasonable method to solve the problem of missing data and therefore can ensure the validity and reliability of LCA.

scholarly journals Efficiency of centrifugal flotation during the refining of gold-bearing enrichment products

2018 ◽  
Vol 56 ◽  
pp. 03016
Author(s):  
Svetlana Salomatova
Keyword(s):  
Foam Layer ◽  
Inclined Plane ◽  
Hydrophobic Properties ◽  
Flotation Machine ◽  
Mineral Separation ◽  
Mineral Particles ◽  
Ore Processing ◽  
Series Of Experiments ◽  
Gold Bearing

The results of enriching the products of gold-antimony ore processing using centrifugal flotation are presented. A series of experiments was conducted on a laboratory centrifugal flotation machine with peripheral unloading of concentrate (CFM) and on a laboratory mechanical flotation machine (FM). The selectivity of deposition of mineral particles from the flotation mineralized foam flowing on an inclined plane after flotation under different conditions (with a collector and without the use of a collector) has been studied. It has been shown that it is possible to regulate the intensity and selectivity of deposition of material from the foam layer by using a collector. It is established that the combination of the effect of the centrifugal force of fluid rotation and the hydrophobic properties of minerals makes it possible to strengthen the selectivity of mineral separation, flotation in a centrifugal flotation machine can be used for purification operations with the aim of improving the quality of concentrate.

The analysis of “Gels” in polymer films

1989 ◽  
Vol 47 ◽  
pp. 362-363
Author(s):  
G. M. Brown ◽  
D. F. Brown ◽  
J. H. Butler
Keyword(s):  
Molecular Weight ◽  
Film Industry ◽  
Local Stress ◽  
Melt Index ◽  
Polyethylene Films ◽  
Crosslinked Polymer ◽  
Polymeric Gels ◽  
Mineral Particles ◽  
Polymeric Species ◽  
Special Concern

The term “gel”, in the jargon of the plastics film industry, may refer to any inclusion that produces a visible artifact in a polymeric film. Although they can occur in any plastic product, gels are a principle concern in films where they detract from the cosmetic appearance of the product and may compromise its mechanical strength by acting as local stress concentrators. Many film gels are small spheres or ellipsoids less than one millimeter in diameter whereas other gels are fusiform-shaped and may reach several centimeters in length. The actual composition of gel inclusions may vary from miscellaneous inorganics (i.e. glass and mineral particles) and processing additives to heavily oxidized, charred or crosslinked polymer. The most commonly observed gels contain polymer differing from the bulk of the sample in its melt viscosity, density or molecular weight.Polymeric gels are a special concern in polyethylene films. Over the years and with the examination of a variety of these samples three predominant polymeric species have been observed: density gels which have different crystallinity than the film; melt-index gels in which the molecular weight is different than the film and crosslinked gels which are comprised of crosslinked polyethylene.

Long-term variations in individual particle types in the aerosol of Phoenix, Arizona, as determined using automated electron microprobe analysis and multivariate statistical techniques

1993 ◽  
Vol 51 ◽  
pp. 742-743
Author(s):  
Karen A. Katrinak ◽  
James R. Anderson ◽  
Peter R. Buseck
Keyword(s):  
Electron Microprobe ◽  
Fine Fraction ◽  
Coarse Fraction ◽  
Motor Vehicles ◽  
Multivariate Statistical Methods ◽  
Multivariate Statistical ◽  
X Ray ◽  
Mineral Particles ◽  
Anthropogenic Air Pollutants

Aerosol samples were collected in Phoenix, Arizona on eleven dates between July 1989 and April 1990. Elemental compositions were determined for approximately 1000 particles per sample using an electron microprobe with an energy-dispersive x-ray spectrometer. Fine-fraction samples (particle cut size of 1 to 2 μm) were analyzed for each date; coarse-fraction samples were also analyzed for four of the dates.The data were reduced using multivariate statistical methods. Cluster analysis was first used to define 35 particle types. 81% of all fine-fraction particles and 84% of the coarse-fraction particles were assigned to these types, which include mineral, metal-rich, sulfur-rich, and salt categories. "Zero-count" particles, consisting entirely of elements lighter than Na, constitute an additional category and dominate the fine fraction, reflecting the importance of anthropogenic air pollutants such as those emitted by motor vehicles. Si- and Ca-rich mineral particles dominate the coarse fraction and are also numerous in the fine fraction.

IMPLEMENTATION OF LOW-TRAUMATIC TECHNOLOGY OF GRAIN SEPARATION FROM A WHEAT EAR: RESULTS OF THE PILOT STUDIES

2020 ◽  
Author(s):  
V.I. Pakhomov ◽  
◽  
S.V. Braginets ◽  
O.N. Bakhchevnikov ◽  
A.I. Rukhlyada ◽  
...  
Keyword(s):  
Separation Process ◽  
Experimental Device ◽  
Cereal Crops ◽  
Pilot Studies ◽  
Traditional Technology ◽  
Air Jet ◽  
Cereal Breeding ◽  
Grain Damage ◽  
Partial Abrasion

Low-traumatic technology of grain separation from an ear is developed. It consists in influence of an air jet on an ear.It leads to rolling of an ear on a surface of the threshing device concave and causes its partial abrasion which is followed by grains separation. Process of wheat ears low-traumatic threshing in the experimental device yields satisfactory results, provides reduces grain endosperm damage on 10-12% in comparison with traditional technology. Germ of grain damage decreases by 5%.Crushing of grain made no more than 0,5%. Use of the developed technology of the low-traumatic threshing will allow to reduce grain damage of cereal crops in case of the harvesting. It is important by cereal breeding.

Phytosome Drug Delivery of Natural Products: A Promising Technique for Enhancing Bioavailability

2017 ◽  
Vol 7 (03) ◽  
Author(s):  
Rani Anjana ◽  
Kumar Sunil ◽  
Sharma Hitender ◽  
Khar R. K.
Keyword(s):  
Drug Delivery ◽  
Natural Products ◽  
Plant Extract ◽  
Herbal Extract ◽  
Present Review ◽  
Absorption Profile ◽  
Promising Technique ◽  
Characterization Techniques ◽  
Advanced Form

The phytosome technology was developed by Indena markedly enhancing the bioavailability of selected phytomedicines, by incorporating phospholipids into standardized plant extract, which improve their absorption and utilization. Phytosome are advanced form of herbal extract that shows better absorption profile than conventional herbal extract. The present review focus on the preparation and characterization techniques of phytosomes, merits and various landmarks in the field of phytosomes.

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