Handbook of Flotation Reagents: Chemistry, Theory …
Chemisorbed fatty acids become more important at pH above the iso-electric point (IEP) of iron oxides, but their concentration rapidly declines due the relatively weak …
A review of zinc oxide mineral beneficiation using flotation …
Flotation of oxidized zinc using fatty acids. The recovery of single mineral flotation is appropriated using oleic acid at pH around 10.0 [3], [15]. The negative zeta potential increases due to adsorption of oleic anions on the mineral surface when smithsonite is treated with oleic acid. As it has been revealed by FTIR analyses, the …
(PDF) Flotation of Iron Ores: A Review
This paper reviews the industrial practices and fundamental research surrounding iron ore flotation. The advantages and disadvantages of direct flotation, cationic reverse flotation, and anionic ...
THE FLOTATION OF SOUTH AFRICAN CHROMITE ORES …
As early as the 1930's many attempts were made to solve the problem of selective flotation of chromite ores. In early attempts mainly anionic collectors such as fatty acids were used [4, 5]. Morawitz studied the effect of pH regulators on pure chromite minerals [6]. He found that all amines with HCl and NaOH gave satisfactory
Selective flotation of chromite ores
I preferably use a fatty acid with three double bonds such as an ammonium salt of linoleic or ammonium linoleate. Beneficial results are derived if a frother is used, and petroleum aliphatic acids, steam distilled pine oil or cresylic acid may be used for this purpose. ... 2 Der ton of solution. A bulk flotation of the chromite is obtained in ...
AN INVESTIGATION OF THE FLOTATION QF CHROMITE
Previous investigations of chromite flotation have generally involved the use of fatty acids, amines, alkyl sulfates, soaps, and various additives^,^,^,^> 11,16,19) ^ In particular …
Flotation of Chromite Ore
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Chrome Ore Beneficiation Process | Chromite Processing
AN INVESTIGATION OF THE FLOTATION QF CHROMITE …
with fatty acid flotation, and in some cases, the high sur face area of the mineral. Previous investigations of chromite flotation have generally involved the use of fatty acids, amines, alkyl sulfates, soaps, and various additives^,^,^,^> 11,16,19) ^ In particular Weinig suggested the use of caustic, kerosene,
FLOTATION BEHAVIOR OF SUDANESE CHROMITE ORES
1.5 to 5.5 with a long chain fatty acid collector as reported by Havens (1946). The selectivity of the process is enhanced by adding a soluble fluoride compound such as hydrofluoric acid, sodium fluoride or sodium silicofluoride in the flotation medium. The flotation process is typically conducted by adding 0.5 to 5.0 pounds fatty acid, 0.1
A comparative study between the adsorption …
Micro-flotation experiments, zeta potential, and FTIR spectroscopy analysis were done using the same reagent concentration. The results of the experiments showed that: Four depressants under study have had no …
(PDF) Rare Earth Flotation Fundamentals: A Review
The high selectivity in the flotation xenotime with fatty acid salts observed in the present work was also noticed for apatite flotation with the use of fatty acid collectors, in studies carried ...
Flotation of chromite and serpentine
Dextrin has a strong depressing effect in the alkaline pH range depressing chromite's flotation by 55% at pH 10–12, while cyclodextrin activates chromite's …
Flotation in Mineral Processing | SpringerLink
Abstract. Few of the metals or minerals required by modern civilisation are mined naturally pure and ready to use. Instead they occur in complex aggregates of up to twenty different minerals of which only one or two will be of value. There are some two hundred of these 'value' minerals amoung the several thousand minerals that go to form ...
A critical review on natural surfactants and their potential for
In this study, unsaturated C 18 fatty acids have shown the flotation efficiency of hematite ore compared to saturated fatty acids. Because hematite recovery and hydrophilicity of BioS tend to increase with the fatty acid unsaturation degree. ... chromite, and talc (Liu et al. 2006). In this study, the depressive action of …
Effect of type of modifier and pH value on chromite flotation.
The modifying action of carboxymethyl cellulose, fluorosilic acid, ethylene diamine-tetraacetic acid, dextrin and cyclodex- trin during chromite flotation by SO is presented in Fig. 4.
Significance of liberation characteristics in the fatty acid flotation
Phosphate flotation has been used by industry for more than a half century but still faces many technical challenges. Such challenges include not only the selection of the chemical reagents but the characteristics of the feed itself. This paper deals with the investigation of feed characteristics and how these characteristics affect the flotation …
Froth flotation of chromite with fluoride
The results of the locked flotation tests indicated that the middlings would not build up 35 aqueous pulp of such an ore in the Presence of hydrofluoric acid, and a long-chain fatty acid at a pulp acidity of between pH 1.5 and pH 5.5, and separating a chromium-containing froth as a concentrate.
Amine flotation of chromite from acidic pulps
In the first method chromite ore which has been deslimed is subjected to flotation at a pH of 1.5 to 5.5 with a long chain fatty acid collector as shown in U.S. Pat. No. 2,412,217. The selectivity of the process is enhanced by the inclusion of a soluble fluoride ion containing compound such as hydrofluoric acid, sodium fluoride or sodium ...
Flotation Behavior of Sudanese Chromite Ores
Froth flotation was used to upgrade this chromite ore. Oleic acid was used as collector. ... the first method chromite ore which has been deslimed is subjected to flotation at a pH of 1.5 to 5.5 with a long chain fatty acid collector as reported by Havens (1946). The selectivity of the process is enhanced by adding a soluble fluoride compound ...
(PDF) Rare Earth Flotation Fundamentals: A …
In general, fatty acids and hydroxamates are the most common collectors used in the flotation of REE minerals; however, different depressant schemes must be used on a deposit basis to selectively ...
Selective flotation of iron oxide
to those obtained with fatty acids is required. First, the selective flotation of hematite from earthy ores has proven difficult with either fatty acids or sulfo nates. In this study a concentrate containing 61.5% was obtained from such an ore with a modest addition of hydroxamate. Secondly, the spiral tailings used in this study are
Effect of depressants on flotation separation of magnesite …
The flotation separation of magnesite from calcium-containing minerals has always been a difficult subject in minerals processing. This work studied the inhibition effects of carboxymethyl cellulose (CMC), sodium lignosulphonate, polyaspartic acid (PASP) and sodium silicate on flotation behaviors of magnesite, dolomite and calcite, providing …
(PDF) Flotation of chromite and serpentine
In these studies, generally, anionic flotation of chromite mineral has been carried out successfully by using fatty acids in an …
A study on the recovery of fine chromite from UG2 tailings
In this regard, fatty acids (in the study, two collectors, from Hoechst and Cytec respectively being used) offered good grades and recovery; no region for selective flotation was established for chromite with negative surface charge. Güney and Atak (1997), in an investigation into the flotation of chromite from olivine, involving adsorption ...
CA2729297C
Methods of froth flotation for the beneficiation of an ore that use a collector and compositions and kits that include a collector. In some examples, a method of froth flotation for the beneficiation of an ore can include contacting a slurry that includes an ore with a collector and recovering a beneficiated ore. The collector can include one or more …
Application of multiple linear regression (MLR) analysis …
these studies, generally, anionic flotation of chromite mineral has been carried out successfully by using fatty acids in an alkaline medium. However, especially, Na-Oleate flotation of a chromite ...
Flotation of chromite and serpentine
Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. A good knowledge of the flotation behaviour of chromite and the establishment of conditions for its selective separation from the gangue minerals might help the future exploitation of chromite deposits. In this paper, the floatability of …
Study on the flotation behavior and interaction
Compared to conventional separation methods, the best result was obtained after rougher flotation concentrate was treated with acid surface pretreatment and three cleaning flotation stages, producing a concentrate with a TiO 2 grade of 47.68% and a TiO 2 recovery of 26.66%. Taken together, acid surface pretreatment is a potential and novel ...
Application of multiple linear regression (MLR) analysis …
task in shedding light on the use of the flotation method in chromite concentration to be carried out on the plant scale in the following years. Many studies have been done on the flotation of chromite with anionic collectors such as petroleum sulphonate, oleic acid and Na-oleate which is one of the oleic acid salts (Havens, 1946; Palmer et al.,
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