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Dewatering with Piston Press - Backing Mesh and Temperature Effects
2015 (English)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Purpose:The purpose of the thesis is to investigate if and how backing mesh characteristics affects filtration and moist content in the product of a slurry, along with an investigation of if and how different slurry temperatures affects the backing mesh and results, when using a piston press.Background:The tube press, a high pressure filtration application, is designed to filter fine particles. Inside the tube press, there is a filter cloth, supported by a backing mesh behind the filter cloth, to prevent the filter cloth of being damaged by the high pressure in the tube press. Since there are no current reports on the subject of how the backing mesh affects the filtration in tube presses, this study aims to find out if and how the differences appear, in terms of filtration time and moist content in the slurry product, when different backing meshes are used. A parameter that usually affects filtration results of a slurry is the slurry temperature, which is also analyzed in this report. The way it is analyzed is by comparing if different temperatures of the slurry affects the backing mesh differently, depending on the backing mesh used. This is done by exposing and testing the backing meshes to three different temperatures, and then comparing if the results differ between each backing mesh.Method:Collection of information through experiments with a piston press, of which five different backing mesh compositions are tested for three different temperatures of the same slurry.Conclusion:The conclusion made regarding the temperature of the slurry, is that it clearly affects the filtration time for the piston press, regardless of which backing mesh is used. There was a reduction in filtration time as the temperature of the slurry was higher, due to lower viscosity, which appeared regardless of the backing mesh used.The moist content in the product cannot be proven to change depending on the slurry temperature, but the moist content seem to get lower with a higher slurry temperature, independent by the type of backing mesh used.

Place, publisher, year, edition, pages
2015. , 69 p.
Keyword [en]
Keyword [sv]
Teknik, Filter cake, tube press, piston press, moist content, slurry, backing mesh
URN: urn:nbn:se:ltu:diva-58415Local ID: efef8073-04d9-4be3-a612-41dd50f639d8OAI: diva2:1031803
Subject / course
Student thesis, at least 15 credits
Educational program
Mining and Geotechnical Engineering, bachelor's level
Validerat; 20141218 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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