Parametric studies on cell flotation of Mazidağı phosphate rock

Download

index.pdf

Date

2003

Author

Öztin, Z. Elif

Metadata

Show full item record

Item Usage Stats

183
views

0
downloads

Phosphate is one of the essential minerals for all living organisms. It has to be supplied to the soil in order for plant growth. In Turkey, most of the soils lack phosphate mineral. Although this can be overcome by the use of phosphate fertilizers, in Turkey there are no phosphate mines being utilized; and this brings about the need to import phosphate rock and phosphate fertilizers. The estimated phosphate rock reserve of Turkey is around 300 million tons, but it cannot be utilized since no economical method of upgrading has been proved to work yet. The aim of this study has been two-fold; to determine the effects of several parameters on the cell flotation of Mardin-Mazidagi phosphate rock and to increase the grade of the product above 30% P2O5 content with a reasonable recovery rate, so that it could be used commercially. Phosphate rock upgrading was made by using flotation in a cell. There are many factors affecting the recovery and grade of the product such as, particle size, pulp pH, collector volume, acid and collector conditioning times and temperature. Phosphate rock samples used contained 14% P2O5, 43% CaCO3 and 1% SiO2 with a CaO/P2O5 ratio of 3.1. Due to the low silica content, one-stage flotation was made. In the experiments, effects of the important parameters were tested at constant pulp density (10% solids by weight). Particle sizes were between 53 m and 150 m, while the pH values were kept between 5,0 - 6,5 using amounts of acid within the range of 6 - 19 kg H3PO4/ton of rock. The collector (mixture of kerosene and oleic acid in 1:3 volumetric ratio) was used in the range of 0,6 ml (0,96 kg collector/ton rock) and 5,4 ml (8,64 kg collector/ton rock). Acid and collector conditioning times were changed between 10-110 s and 10-80 s, respectively. The temperature range was between 15-35 °C. At the end of the parametric studies a grade of 36% P2O5 with a

Subject Keywords

Flotation, Phosphate rock, Phosphate rock, Mardin (Turkey)

URI

http://etd.lib.metu.edu.tr/upload/2/1091602/index.pdf
https://hdl.handle.net/11511/13715

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

SYNTHESIS OF TiO2 NANOSTRUCTURES VIA HYDROTHERMAL METHOD Bilgin, Nursev; Agartan, Lutfi; PARK, JONGEE; Öztürk, Abdullah (2014-10-16) Titania (TiO2) nanostructures were produced via hydrothermal method using amorphous TiO2 powders synthesized by the sol-gel precipitation process. The hydrothermal system was isolated from the environment and hydrothermal reactions were allowed to execute at 130 degrees C for 36 h at autogeneous pressure, and at a stirring rate of 250 rpm. Scanning electron microscopy (SEM) analysis revealed that TiO2 nanofibers formed instead of nanotubes upon utilization of amorphous TiO2 precursor. After hydrothermal syn...
A density functional study on some cyclic N10 isomers Türker, Lemi (Elsevier BV, 2019-4) Polynitrogen compounds, comprising only nitrogen atoms, are rare. They are considered as promising candidates of clean (green) high energy density materials because of their high energy content and their sole decomposition product is N2. Extending the previous work which was on cyclic N8 isomers, in this study some cyclic N10 isomers having 1e4 cycles are considered within the limitations of density functional theory at the levels of B3LYP/6-311þþG(d,p) and B3LYP/cc-PVTZ. Some of the structures, includ...
Combined effect of point defects and layer number on the adsorption of benzene and toluene on graphene Akay, Tugce Irfan; Toffoli, Daniele; Toffoli, Hande (Elsevier BV, 2019-06-30) Understanding the adsorption properties of organic molecules on graphene-based substrates is important for such applications as air and water filters. Pristine graphene is often the model substrate used in the theoretical investigations of this problem. While useful, pristine single-layer graphene is however an idealized model. In this work, we assess the effect of the presence of point defects (single vacancy, divacancy, and the Stone-Wales defect) in single-layer and bilayer graphene on the energetics of ...
Distinct patterns of sedimentary phosphorus fractionation and mobilization in the seafloor of the Black Sea, Marmara Sea and Mediterranean Sea Akçay, İsmail; Yücel, Mustafa (2023-03-10) Phosphorus (P) is a key element to all life that is used for structural and functional component of all organisms. The cycling of sedimentary P may differ depending on the redox-conditions of the overlying waters affecting the dynamics, and distribution of P-fractions and the elements that are highly coupled to P cycle. Though biogeochemistry of water column in the three interconnected marine basins of Black, Marmara and Mediterranean Seas have been studied extensively, few studies were carried out to under...
Impact of dietary calcium tetraborate supplementation on the mineral content of egg and eggshell of laying quails İflazoğlu, Sera; İflazoğlu Mutlu, Seda; Şimsek, Ülkü Gülcihan; Mutlu, Muhsin; Tatlı Seven, Pınar; Yılmaz, Ayşen (2021-04-01) Boron (B) is a trace element that plays an important role in the mineral, cell membrane, hormone, and enzyme metabolism of animals and humans. The aim of this study was to examine the effect of dietary calcium tetraborate (CaB4O7) supplementation on the mineral composition of egg content and eggshell of laying quails. For this purpose, a total of 20 male and 40 female quails, 6-week-old, were equally divided into 2 groups (control and additive groups) in 5 replicates (6 birds/replicate) and given CaB4O7...

Citation Formats

Z. E. Öztin, “Parametric studies on cell flotation of Mazidağı phosphate rock,” M.S. - Master of Science, Middle East Technical University, 2003.