dc.contributor.author |
Wijewardhana, TDU |
|
dc.contributor.author |
Ratnayake, AS |
|
dc.contributor.editor |
Dissanayake, DMDOK |
|
dc.contributor.editor |
Samaradivakara, GVI |
|
dc.date.accessioned |
2022-03-23T03:23:24Z |
|
dc.date.available |
2022-03-23T03:23:24Z |
|
dc.date.issued |
2019-08 |
|
dc.identifier.citation |
Wijewardhana, T.D.U., & Ratnayake, A.S. (2019). The upgradability of beach ilmenite found in Sri Lanka by mechanically activated carbothermic reduction [Abstract]. In D.M.D.O.K. Dissanayake & G.V.I. Samaradivakara (Eds.), Proceedings of International Symposium on Earth Resources Management & Environment 2019 (p. 123). Department of Earth Resources Engineering, University of Moratuwa. |
en_US |
dc.identifier.uri |
http://dl.lib.uom.lk/handle/123/17433 |
|
dc.description.abstract |
A large amount of high-quality titanium ore minerals are required for future
development of the titanium industry. Although ilmenite (FeTOs) is a type of
low-grade titanium ore, it has a significant utility value in the production of
titanium dioxide (TiOi). The existence of ilmenite percentage (70%-72%) is much
higher than the rutile percentage (8%) i n the northeastern coastal area of Sri Lanka.
The results of a large number of chemical and physical investigations have been
published regarding the reduction of ilmenite but the effective and improved
reduction of ilmenite is relatively limited. The long reduction time, slower reduction
rate are the major problems in the existing electric furnace process. I n this study, the
carbothermic reduction behavior and optimum temperature under specific
conditions for milled ilmenite were investigated. Magnetically separated ilmenite
sample was supplied by Lanka Mineral Sands, Pulmoddai. Activated carbon was
used as a reducing agent. A mixture of ilmenite and activated carbon (4 to 1 ratio)
was subjected to high energy ball milling for one to four hours separately.
Subsequently, milled samples were heated for two hours at different temperature of
800°C, 900°C, 1000°C, 1100°C, and 1200°C. Phase identification and functional
groups of the treated samples were determined using X-ray Diffractometer (XRD)
and Furrier Transform Infrared (FTIR), respectively. The particle sizes of the initial
and milled samples were determined using a dry sieving method. In contrast with
initial ilmenite, relative peak heights, sharpness of peaks, the number of titanium
dioxide (TiOi), XRD peaks in treated samples, and metallization of the iron were
increased with the time during the studied four hours. Many corresponding
ilmenite peaks were disappeared after four hours milling and annaling at 1000°C,
1100°C and 1200°C. FTIR analysis indicates initial ilmenite contains Fe-O and OH
stretching vibrations. The upgraded ilmenite sample contains Ti-O stretching
vibrations w i t h more broadness. The dso particle size of initial ilmenite sample and
four hours milled samples were 0.10 mm and 0.075 mm, respectively. Mechanical
activation significantly improve effiency of carbothermic reduction due to particle
size reduction and increasing of specific area. The annealing temperature can be
reduced up to 1000°C during the studied four hours. Therefore, beach ilmenite
found in Sri Lanka can be upgraded by mechanically activated carbothermic
reduction. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Department of Earth Resources Engineering |
en_US |
dc.subject |
Annealing |
en_US |
dc.subject |
Ball milling |
en_US |
dc.subject |
Low grade |
en_US |
dc.subject |
Reduced |
en_US |
dc.subject |
Titanium dioxide |
en_US |
dc.title |
The upgradability of beach ilmenite found in Sri Lanka by mechanically activated carbothermic reduction |
en_US |
dc.type |
Conference-Abstract |
en_US |
dc.identifier.faculty |
Engineering |
en_US |
dc.identifier.department |
Department of Earth Resources Engineering |
en_US |
dc.identifier.year |
2019 |
en_US |
dc.identifier.conference |
International Symposium on Earth Resources Management & Environment 2019 |
en_US |
dc.identifier.place |
Colombo |
en_US |
dc.identifier.pgnos |
p. 123 |
en_US |
dc.identifier.proceeding |
Proceedings of International Symposium on Earth Resources Management & Environment 2019 |
en_US |
dc.identifier.email |
dilmiwijewardhana94@gmail.com |
en_US |