scholarly journals Selective Separation of Hematite by a Synthesized Depressant in Various Scales of Anionic Reverse Flotation

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 124 ◽  
Author(s):  
Arash Tohry ◽  
Reza Dehghan ◽  
Saeed Chehreh Chelgani ◽  
Jan Rosenkranz ◽  
Omid Rahmani
Keyword(s):  
Iron Oxide ◽  
Iron Ore ◽  
Selective Separation ◽  
Reverse Flotation ◽  
High Quality ◽  
Main Hypothesis ◽  
Iron Concentrate ◽  
Ore Processing ◽  
The World ◽  
Apatite Group

Demand for high-quality iron concentrate is significantly increasing around the world. Thus, the development of the techniques for a selective separation and rejection of typical associated minerals in the iron oxide ores, such as phosphorous minerals (mainly apatite group), is a high priority. Reverse anionic flotation by using sodium silicate (SS) as an iron oxide depressant is one of the techniques for iron ore processing. This investigation is going to present a synthesized reagent “sodium co-silicate (SCS)” for hematite depression through a reverse anionic flotation. The main hypothesis is the selective depression of hematite and, simultaneously, modification of the pulp pH by SCS. Various flotation experiments, including micro-flotation, and batch flotation of laboratory and industrial scales, were conducted in order to compare the depression selectivity of SS versus SCS. Outcomes of flotation tests at the different flotation scales demonstrated that hematite depression by SCS is around 3.3% higher than by SS. Based on flotation experiment outcomes, it was concluded that SCS can modify the pH of the process at ~9.5, and the plant reagents (including NaOH, Na2CO3, and SS gel) can be replaced by just SCS, which can also lead to a higher efficiency in the plant.

STRONTIUM-APATITE: NEW OCCURRENCES, AND THE EXTENT OF Sr-FOR-Ca SUBSTITUTION IN APATITE-GROUP MINERALS

2002 ◽  
Vol 40 (1) ◽  
pp. 121-136 ◽  
Author(s):  
A. R. Chakhmouradian ◽  
E. P. Reguir ◽  
R. H. Mitchell
Keyword(s):  
Ca Substitution ◽  
Apatite Group ◽  
New Occurrences

Electronic structure of minerals: The apatite group as a relevant example

2000 ◽  
Vol 77 (6) ◽  
pp. 991-1006 ◽  
Author(s):  
Vanina Louis-Achille ◽  
Laurent De Windt ◽  
Mireille Defranceschi
Keyword(s):  
Electronic Structure ◽  
Apatite Group

Looking for an Ideal Particle Size for Apatite Flotation

2008 ◽  
Vol 591-593 ◽  
pp. 805-810 ◽  
Author(s):  
R.C. Santana ◽  
A.C.C. Farnese ◽  
S.P. Ceolin ◽  
R.C. Domingues ◽  
M.C.B. Fortes ◽  
...  
Keyword(s):  
Particle Size ◽  
Phosphate Rock ◽  
Size Range ◽  
Phosphorus Recovery ◽  
Column Flotation ◽  
Low Grade ◽  
Phosphate Rocks ◽  
Particle Size Range ◽  
Apatite Group ◽  
Wide Assortment

Today, the phosphate rock processed in the world represents around some 20 billion dollars per year. Some exploitable deposits are characterizing by low grade phosphate rocks, composed of the apatite group in association with a wide assortment of accessory minerals. Usually a combination of beneficiation techniques is used to process a phosphate rock since run of mine, and then a flotation is applied to recovery apatite. This work proposes an evaluation of particle size for apatite recovery by column flotation in bench-scale. The variables collector dosage and depressant dosage were investigated experimentally applying a factorial design. According to the experimental results, the particle size range between 37&m and 105&m is an optimum size used to obtain simultaneously a product with the industry demand grade (at least 33%) and phosphorus recovery, upper than 60%.

scholarly journals The lanthanides and yttrium in minerals of the apatite group; a review

1982 ◽  
Author(s):  
Michael Fleischer ◽  
Z.S. Altschuler
Keyword(s):  
Group A ◽  
Apatite Group
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