Enhanced dissolution of tantalite/columbite following milling
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A tantalum/niobium concentrate has been ball-milled for up to 50 h in a laboratory mill without apparent phase change, other than a decrease in unit cell symmetry and some amorphisation. The extent of dissolution in a mixture of hydrochloric acid and sodium fluoride increased with milling time. For a powder milled for 50 h, over 95% of the concentrate were solubilised in 24 h compared with ∼ 50% in 48 h for a 2-h milled powder. The kinetics of dissolution changed with the milling time,...[Show more]
dc.contributor.author | Welham, N | |
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dc.date.accessioned | 2015-12-10T23:34:37Z | |
dc.identifier.issn | 0301-7516 | |
dc.identifier.uri | http://hdl.handle.net/1885/69505 | |
dc.description.abstract | A tantalum/niobium concentrate has been ball-milled for up to 50 h in a laboratory mill without apparent phase change, other than a decrease in unit cell symmetry and some amorphisation. The extent of dissolution in a mixture of hydrochloric acid and sodium fluoride increased with milling time. For a powder milled for 50 h, over 95% of the concentrate were solubilised in 24 h compared with ∼ 50% in 48 h for a 2-h milled powder. The kinetics of dissolution changed with the milling time, indicating a change in the rate-determining step due to milling. These effects were attributed to the decrease in crystallinity of the powder, giving a substantial increase in the lattice strain and in unsatisfied surface bonds where dissolution was thought to occur. | |
dc.publisher | Pergamon-Elsevier Ltd | |
dc.source | International Journal of Mineral Processing | |
dc.subject | Keywords: dissolution; milling; mineral processing; ore Dissolution; Mechanical activation; Milling | |
dc.title | Enhanced dissolution of tantalite/columbite following milling | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 61 | |
dc.date.issued | 2001 | |
local.identifier.absfor | 020406 - Surfaces and Structural Properties of Condensed Matter | |
local.identifier.ariespublication | MigratedxPub2042 | |
local.type.status | Published Version | |
local.contributor.affiliation | Welham, N, College of Physical and Mathematical Sciences, ANU | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 3 | |
local.bibliographicCitation.startpage | 145 | |
local.bibliographicCitation.lastpage | 154 | |
local.identifier.doi | 10.1016/S0301-7516(00)00032-6 | |
dc.date.updated | 2015-12-10T11:34:48Z | |
local.identifier.scopusID | 2-s2.0-0035090149 | |
Collections | ANU Research Publications |
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