Elucidation of negative pressure generated by concentrated layer of settled particles and its application

Research Project

Project/Area Number	24651076
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Environmental technology/Environmental materials
Research Institution	Nagoya Industrial Science Research Institute
Principal Investigator	TSUBAKI Junichiro 公益財団法人名古屋産業科学研究所, その他部局等, 研究員 (50109295)
Co-Investigator(Kenkyū-buntansha)	MORI Takamasa 法政大学, 生命科学部, 准教授 (20345929)
Project Period (FY)	2012-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Budget Amount *help	¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000) Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000) Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords	スラリー / 濃縮層 / 負圧 / 固化 / 沈降濃縮層 / 吸水 / 堆積層
Outline of Final Research Achievements	The pressure generated by the concentrated layer of the slurry was investigated by changing the slurry preparation conditions. In order to verify the engineering applicability of the negative pressure generation, the water suction experiment was done by changing the slurry preparation and process conditions. It was found that the negative pressure was observed when using the small particle below a diameter of 1µm. It was also shown that the concentrated layer should be not consolidated and have a relatively high particle concentration to generate the negative pressure. The negative pressure was generated by the medium in the closed space contacted with the atmosphere through the concentrated layer. In addition it was demonstrated that the concentrated layer can suck up water .