Construction of the attainable region candidates for ball milling operations under downstream size constraints

This study investigated the influence of the attainable region technique to ball milling as applied in reactor technology. Flow rate, ball filling, mill speed, ball size and mill density were varied. When each was varied, the rest of the parameters were kept constant in-order to determine the influe...

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Bibliographic Details
Main Author: Dlamini, Mlandvo Brian Thembinkosi
Other Authors: Mulenga, Francois
Format: Others
Language:en
Published: 2019
Subjects:
Online Access:http://hdl.handle.net/10500/25813
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spelling ndltd-netd.ac.za-oai-union.ndltd.org-unisa-oai-uir.unisa.ac.za-10500-258132019-10-05T03:22:33Z Construction of the attainable region candidates for ball milling operations under downstream size constraints Dlamini, Mlandvo Brian Thembinkosi Mulenga, Francois Attainable region Population balance model Ball milling MODSIM 660.28320113 Ball mills -- Computer simulation Statistical tolerance regions -- Computer simulation Chemical reactors -- Computer simulation Chemical kinetics -- Computer simulation Fluid dynamics -- Computer simulation This study investigated the influence of the attainable region technique to ball milling as applied in reactor technology. Flow rate, ball filling, mill speed, ball size and mill density were varied. When each was varied, the rest of the parameters were kept constant in-order to determine the influence of each parameter on the process of milling. Selection function and breakage function parameters were selected for the mill model. These were kept constant for all four circuit configurations: open milling circuit, normal closed circuit, reverse closed circuit, and combined closed circuit. Flow rate was varied from 10 tph to 150 tph. It was observed that in all circuit configurations the optimum results were obtained from 90 tph upwards. When ball filling was varied, the optimum results were obtained between 30 % and 40 % of ball filling. At this range the mill is neither experiencing under-filling nor over-filling. When the mill speed was varied, at 60 – 80 % of critical speed the product specification was achieved and for grinding balls, sizes of between 60 mm and 90 mm yielded the optimum results. Varying the mill density resulted in insignificant changes. From the results, the combined closed circuit produced more of the product specification. School of Engineering M. Tech. (Engineering: Chemical) 2019-10-04T10:07:38Z 2019-10-04T10:07:38Z 2019-09 Dissertation http://hdl.handle.net/10500/25813 en 1 online resource (xiv, 102 leaves) : illustrations (chiefly color), color graphs application/pdf
collection NDLTD
language en
format Others
sources NDLTD
topic Attainable region
Population balance model
Ball milling
MODSIM
660.28320113
Ball mills -- Computer simulation
Statistical tolerance regions -- Computer simulation
Chemical reactors -- Computer simulation
Chemical kinetics -- Computer simulation
Fluid dynamics -- Computer simulation
spellingShingle Attainable region
Population balance model
Ball milling
MODSIM
660.28320113
Ball mills -- Computer simulation
Statistical tolerance regions -- Computer simulation
Chemical reactors -- Computer simulation
Chemical kinetics -- Computer simulation
Fluid dynamics -- Computer simulation
Dlamini, Mlandvo Brian Thembinkosi
Construction of the attainable region candidates for ball milling operations under downstream size constraints
description This study investigated the influence of the attainable region technique to ball milling as applied in reactor technology. Flow rate, ball filling, mill speed, ball size and mill density were varied. When each was varied, the rest of the parameters were kept constant in-order to determine the influence of each parameter on the process of milling. Selection function and breakage function parameters were selected for the mill model. These were kept constant for all four circuit configurations: open milling circuit, normal closed circuit, reverse closed circuit, and combined closed circuit. Flow rate was varied from 10 tph to 150 tph. It was observed that in all circuit configurations the optimum results were obtained from 90 tph upwards. When ball filling was varied, the optimum results were obtained between 30 % and 40 % of ball filling. At this range the mill is neither experiencing under-filling nor over-filling. When the mill speed was varied, at 60 – 80 % of critical speed the product specification was achieved and for grinding balls, sizes of between 60 mm and 90 mm yielded the optimum results. Varying the mill density resulted in insignificant changes. From the results, the combined closed circuit produced more of the product specification. === School of Engineering === M. Tech. (Engineering: Chemical)
author2 Mulenga, Francois
author_facet Mulenga, Francois
Dlamini, Mlandvo Brian Thembinkosi
author Dlamini, Mlandvo Brian Thembinkosi
author_sort Dlamini, Mlandvo Brian Thembinkosi
title Construction of the attainable region candidates for ball milling operations under downstream size constraints
title_short Construction of the attainable region candidates for ball milling operations under downstream size constraints
title_full Construction of the attainable region candidates for ball milling operations under downstream size constraints
title_fullStr Construction of the attainable region candidates for ball milling operations under downstream size constraints
title_full_unstemmed Construction of the attainable region candidates for ball milling operations under downstream size constraints
title_sort construction of the attainable region candidates for ball milling operations under downstream size constraints
publishDate 2019
url http://hdl.handle.net/10500/25813
work_keys_str_mv AT dlaminimlandvobrianthembinkosi constructionoftheattainableregioncandidatesforballmillingoperationsunderdownstreamsizeconstraints
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