The Experts below are selected from a list of 93279 Experts worldwide ranked by ideXlab platform
Lin Yong-zhang - One of the best experts on this subject based on the ideXlab platform.
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Reclamation of used sodium silicate sand
Hebei Journal of Industrial Science and Technology, 2006Co-Authors: Lin Yong-zhangAbstract:The principle and method of physical Reclamation of sodium silicate sand,which include dry Reclamation,wet Reclamation and thermal Reclamation,are introduced summarily,and the research and application of these methods are introduced.The principle of chemical Reclamation of sodium silicate sand through cognition of harden mechanism is presented.The research and present application condition about chemical Reclamation are also related.
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Reclamation of Used Waterglass Sand
Research Studies on Foundry Equipment, 2005Co-Authors: Lin Yong-zhangAbstract:The principle and method of physical Reclamation of sodium silicate sand,which include dry Reclamation,wet Reclamation and thermal Reclamation,are introduced summarily,and the application of these methods is introduced.The principle of chemical Reclamation of sodium silicate sand through recognition of harden mechanism is presented.The research and present application condition about chemical Reclamation is also related.
Jinsong Yang - One of the best experts on this subject based on the ideXlab platform.
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Reclamation negatively influences arbuscular mycorrhizal fungal community structure and diversity in coastal saline-alkaline land in Eastern China as revealed by Illumina sequencing
Applied Soil Ecology, 2016Co-Authors: Junli Hu, Junhua Wang, Jinsong YangAbstract:Abstract Arbuscular mycorrhizal (AM) fungi play a vital role in the succession of the plant community, as well as the enhancement of nutrient uptake and stress tolerance in their host plants. To obtain a better understanding of changes in the AM fungal community composition and diversity in response to Reclamation with vegetation successions, Illumina sequencing was performed with samples that were collected from the coastal saline-alkaline fields of Eastern China. This study consisted of 3 Reclamation stages consisting of 2 years (since 2011), 6 years (since 2007), and 34 years (since 1979) in combination with 4 vegetation statuses, namely bare land, seepweed ( Suaeda salsa ), couch grass ( Imperata cylindrical ), and corn ( Zea mays ). A total of 742 OTUs (Operational Taxonomic Units) from 20,474 sequences affiliated with 4 Glomeromycota families were obtained, with Glomeraceae and Glomus being the most abundant family and genus, respectively. Gigasporaceae, the second-most dominant family, primarily inhabited bare land at the early Reclamation stage (2–6 years). With vegetation successions, there were decreasing trends for both Acaulosporaceae and Gigasporaceae and an increasing trend in Glomeraceae, along with a decreasing trend in soil electrical conductivity (EC) and an increasing trend in soil NO 3 − -N content. The diversity indices of Shannon ( H' ), abundance ( ChaoI ) and dominance ( D ) for AM fungi also decreased with decreasing soil EC or increasing soil NO 3 − -N content, and the Alatalo evenness index ( E a ) of AM fungi increased, and it was inversely correlated with soil pH. Our results clearly showed changes in community structure and decreases in diversity indices for soil AM fungi in coastal saline-alkaline lands during the past 30 years of Reclamations.
Fu Jia-feng - One of the best experts on this subject based on the ideXlab platform.
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Analysis on factors limiting Reclamation towns development a case study of the Heilongjiang Reclamation Area
Urban Studies, 2002Co-Authors: Fu Jia-fengAbstract:With the building of the state farms, Reclamation towns developed and are now playing an important role as central cities in the Reclamation system. They provide services to Reclamation area, and promote towns development vice versa.However, the notable changes occurred under the market economy system greatly impacted the overall environment of Reclamation towns. Some of them are suffering restriction for further development. This paper identifies and deeply analyses the restricting factors aiming at raising the awareness and knowledge and prevoking practical measures so as to enhance the development of Reclamation towns from now on.
Rafał Dańko - One of the best experts on this subject based on the ideXlab platform.
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Physical and chemical characteristics of after-Reclamation dust from used sand moulds
Arabian Journal of Geosciences, 2016Co-Authors: Rafał Dańko, Jan Jezierski, Mariusz HoltzerAbstract:The paper presents the results of investigations of physical and chemical properties of after Reclamation dust that is generated in the foundry industry. Universally applied mechanical Reclamation processes of spent moulding sands generate large amounts of after-Reclamation dusts containing mainly rubbed spent binding agents and quartz dusts. An amount of after-Reclamation dusts—in dependence of the Reclamation system efficiency and the reclaim dedusting system—can reach 5–10 % in relation to the total reclaimed spent moulding sand. After-Reclamation dusts originated from spent moulding sands with different kinds of resins mostly belong to dangerous wastes, since they contain chemo-setting binders with dangerous substances removed in the Reclamation process. None of the companies producing mechanical Reclamation systems offers presently the complex technology and equipment for utilisation of after Reclamation dusts, which would meet technical and economic expectations of foundry plants. The paper presents the results of research carried out at the Faculty of Foundry Engineering AGH UST in Cracow which aims on the determination of possibilities of using the post-Reclamation dust generated during mechanical Reclamation of used moulding sands with organic resins as a source of energy. Different dusts generated in the mechanical Reclamation process of used organic sands, delivered from foundries, were tested to determine their chemical composition, granular characterisation and physicochemical properties. As a result of the investigations, possible ways to utilise the dusts are presented.
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Reclamation of Used Molding Sands
Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings, 2015Co-Authors: Rafał DańkoAbstract:In this chapter, the main attention is focused on the theoretical and practical aspects of the Reclamation of the molding and core sands. The definition and methods of Reclamation characteristics for the initial and proper processes associated with the basic operations of the matrix from spent molding sands are shown. Within the theoretical description of the mechanical Reclamation process the occurrence of these so-called elementary operations were highlighted, that result in the removal of waste of binding materials from the surface of the matrix (sand grains), and which include friction, abrasion and crushing. The next section discusses the most common, practical solutions for reclaimers used in methods for the dry Reclamation—the vibrating reclaimer used for reclaiming the molding sands matrix, which has a good susceptibility to Reclamation of spent furan sands, the pneumatic reclaimer, which is used to reclaim the molding sands matrix that are harder to reclaim, and the thermal regenerator, used in the case of the Reclamation of molding sands with organic binders, where the effect of the removal of the binding material from the grains is up to 100 %. It also presents methods for combined pneumatic-thermal-pneumatic Reclamation, used mostly for the Reclamation of various sands from different technologies. The so-called unconventional methods of Reclamation are mentioned at the end, where mechanical-cryogenic Reclamation performed at about −80 °C is discussed.
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investigations of physicochemical properties of dusts generated in mechanical Reclamation process of spent moulding sands with alkaline resins
中国铸造：英文版, 2014Co-Authors: Overseas Foundry, Rafał Dańko, Mariusz Holtzer, J DankoAbstract:Mechanical Reclamation processes of spent moulding sands generate large amounts of post- Reclamation dusts mainly containing rubbed spent binding agents and quartz dusts. The amount of post- Reclamation dusts, depending in the Reclamation system efficiency and the reclaim dedusting system, can reach 5%-10% in relation to the total reclaimed spent moulding sand. The proper utilization of such material is a big problem facing foundries these days. This study presents the results of investigations of physicochemical properties of post- Reclamation dusts. All tested dusts originated from various Polish cast steel plants applying the mechanical Reclamation process of moulding sands with alkaline resins, obtained from different producers. Different dusts, delivered from foundries, were tested to determine their chemical composition, granular characterization, physicochemical and energetic properties. Presented results confirmed assumptions that it is possible to utilize dusts generated during mechanical Reclamation of used sands with organic resins as a source of energy.
Theo N. Olsthoorn - One of the best experts on this subject based on the ideXlab platform.
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Distribution of grain size and resulting hydraulic conductivity in land Reclamations constructed by bottom dumping, rainbowing and pipeline discharge
Water Resources Management, 2019Co-Authors: Marloes Ginkel, Theo N. OlsthoornAbstract:Spatially constant porosity and hydraulic conductivity are usually applied in hydrological studies related to land Reclamations. However, the grain sorting and the degree of compaction within land Reclamations differ per placement method. A study area at Maasvlakte II, the Netherlands, and the four other land Reclamations that could be found in the literature are considered that were constructed by a combination of bottom dumping, rainbowing and discharging the sand-water mixture by pipeline. The structures of the porous media are derived for each placement method and validated by comparison with semi-variograms of cone-penetration tests. It is found that all placement methods lead to some degree of heterogeneity, so that the hydraulic conductivity in these land Reclamations is not constant. This is due to the degree of segregation of the grain sizes that differs between placement methods. Segregation even varies within a specific placement method because of its characteristics and site-specific circumstances such as settling depth, grain-size distribution and angularity resulting from grain type. If land Reclamations are considered for aquifer storage and recovery for freshwater supply, it should be considered that the recovery efficiency will be affected by both the properties of the material in the borrow area and by the placement methods including their spatial configuration as applied during construction of the Reclamation.
