Effect of Ultrasonic Pretreatment on Oxidized Coal Flotation

The hydrophilic oxidized layer on the coal surface was effectively removed by ultrasonic cavitation, as identified by PSD, SEM, XPS, and contact angle, which increased the flotability and recovery of oxidized coal. However, prolonged ultrasonic pretreatment proved detrimental to oxidized coal flotation. The fresh exposed surface was reoxidized ...

Improving the flotation performance of an oxidized …

Numerous studies have been conducted describing the challenges with oxidized coal flotation. Common industrial collectors such as fuel oil are typically ineffective under natural conditions for the flotation of oxidized coal sources such as the Coalburg seam from the Central Appalachia coalfields of the U.S. Low plant flotation recovery values of less than 30% were …

Enhancement of Flotation Performance of Oxidized Coal by …

Conventional hydrocarbon oil cannot adhere effectively to oxidized coal, resulting in a low yield of clean coal. In this study, a high-speed homogenizer was used to emulsify LDD (laurylamine dipropylene diamine) and kerosene, which enhanced the flotation efficiency of oxidized coal. The flotation results showed an increase from 4.12% (only kerosene) to 23.33% (emulsified …

Effect of Temperature on Coal Flotation with Waste Vegetable Oil …

ABSTRACT In this study, the effect of pulp temperature on coal flotation was investigated. Waste vegetable oil was used as collector. Experiments were carried out at different temperatures (5, 25, 50, and 75°C) and the pros and cons of each temperature for flotation performance were revealed. While flotation performance was lower in higher pulp …

Improving the flotation performance of an oxidized bituminous coal …

Numerous studies have been conducted describing the challenges with oxidized coal flotation. Common industrial collectors such as fuel oil are typically ineffective under natural conditions for the flotation of oxidized coal sources such as the Coalburg seam from the Central Appalachia coalfields of the U.S. Low plant flotation recovery values of less than 30% were …

Conditioner for flotation of oxidized coal - The Dow Chemical …

What is claimed is: 1. A froth flotation process for beneficiaing coal of flotation size which comprises floating the sized coal in a frothing aqueous medium comprising a fuel oil collector and an effective amount of a conditioner selected from the group consisting of (1) an ether amine or hydroxyalkylated ether amine represented by the formula I: ##STR7## wherein each R' is …

Improving Oxidized Coal Flotation Using Biodiesel as a Collector

Oxidized coal is difficult to float using either kerosene or diesel. ... Performance of Vegetable Oils as Flotation Collectors for the Recovery of Coal from Coal Fines Wastes ... Coal Preparation. Volume 21, 2000 - Issue 4. Published online: 27 Apr 2007. Article. An Electrokinetic Study on the Oil Flotation of Oxidized Coal. W. W. Wen et al ...

o idized coal flotation vege le oil - autolav.fr

Oil Processing Plants - Manufacturer and Exporter. About Us. Emerged in short span as one of India's leading manufacturers,suppliers and exporters of solvent extraction plants, vegetable oil refineries, oil derivative plants, oil milling plants with innovative and updated technology with proven track records for wide range of raw materials like rice bran, soyabean, oil cakes, palm …

US4253944A - Conditioner for flotation of oxidized coal

Certain condensation products of a fatty acid or fatty acid ester and a hydroxyalkylated alicyclic nitrogen-containing compound are useful as conditioners to improve the recovery of clean coal in a froth flotation process. The presence of these condensation products in the flotation medium is particularly effective to enhance the recovery of oxidized bituminous coal.

COAL FLOTATION - Mineral Processing & Metallurgy

The standard practice on coal in England has been to use cell-to-cell "Sub-A" Flotation Machines of the double overflow type. Several hundred of the large No. 30 cells (100 cu. ft./cell) are in use. Super-charging is not generally used. Flotation is carried out at low solids, usually under 10% dilution.

Flotation characteristics of oxidized coal - ScienceDirect

There is a good correlation between contact angles, zeta potentials and flotation results and as shown in 40 2 0 ~- 0 a _o -2 0 N -4 0 o- O Zeta potential p 'I. Recovery Contact angle i i I I I 2 4 6 pH e to 12 m _m b 80 _ so 6 u 40 3 T 20 41 0 4 0 a Figure 7 Correlation of the zeta potential and contact angle of oxidized coal and its flotation ...

collectors for enabling flotation of oxidized coal

University of Kentucky UKnowledge Theses and Dissertations--Mining Engineering Mining Engineering 2012 COLLECTORS FOR ENABLING FLOTATION OF OXIDIZED COAL Raghav M. Dube University of Kentucky, [email protected] Recommended Citation Dube, Raghav M., "COLLECTORS FOR ENABLING FLOTATION OF OXIDIZED COAL" (2012). Theses and …

COLLECTORS FOR ENABLING FLOTATION OF OXIDIZED COAL

OF THESIS COLLECTORS FOR ENABLING FLOTATION OF OXIDIZED COAL The coalburg seam coal is an example of difficult to float bituminous coal. Laboratory tests conducted on coalburg flotation feed sample revealed recovery values around 28% with 15% product ash when using fuel oil as collector under natural pH conditions. A detailed study showed that increasing …

US Patent for Conditioner for flotation of oxidized coal Patent …

Certain condensation products of a fatty acid or fatty acid ester and a hydroxyalkylated alicyclic nitrogen-containing compound are useful as conditioners to improve the recovery of clean coal in a froth flotation process. The presence of these condensation products in the flotation medium is particularly effective to enhance the recovery of oxidized bituminous coal.

Flotational Enrichment of Low-Quality and Oxidized Coal …

Abstract The flotation of low-quality Russian and Mongolian coal by means of spent motor oil is investigated. Ozonization is used to improve the flotational properties of the spent oil. The optimal ozonization depth of oil used to enrich coal of poor metamorphic development is 5–6 g/kg. Ozonization increases the oil's content of oxygen-bearing …

Conditioner for flotation of oxidized coal (Patent) | OSTI.GOV

Conditioner for flotation of oxidized coal. Full Record; Other Related Research; Abstract. Certain ether amines and their derivatives are useful to improve the recovery of clean coal in a froth flotation process. The presence of these ether amines and derivatives in the flotation medium is particularly effective to enhance the recovery of ...

Oxidized Coal Flotation Vegetable Oil

On the basis of the contrastive research into the flotation performance of several vegetable oil fatty acids, the rapeseed oil fatty acid with better performance was screened out from many fatty acids, and its linolenic acid c183content is15.81, then through modifying and compounding, new magnesium removal collector emls01was obtained. with the use of this agent in.

O Idized Coal Flotation Vege Le Oil - jeff-studio.fr

coal dryer is available for drying all kinds of coal, such as anthracite, lean coal, needs are also met by importing bituminous and anthracite coal and crude petroleum. cone crusher and other sandstone equipment;ball mill, flotation machine, o idized coal flotation vege le oil romania ball mill manufacturer best stone

Oxidized Coal Flotation Vegetable Oil

Abstract coal fines cf of 7500 mesh were agglomerated using vegetable oils sesame oil and castor oil with varying dosages from 51020. other parameters under this study were ash rejection ar and yield. forndil dosage the yield was found to be 84.93 using castor oil while for sesame oil it was merely 74.22.

An Electrokinetic Study on the Oil Flotation of Oxidized Coal

The electrokinetic behavior of the oxidized coals and the hydrocarbon emulsion droplets were studied by an electrophoresis technique. Generally the isoelectric point (IEP) of the coals decreased with increasing degree of oxidation. A model of selective flotation of oxidized coal is postulated on the basis of the electrokinetic results.

o idized coal flotation vege le oil - gokdziadowakloda.pl

A process for the flotation of particles of lignitic coal, subbituminous coal or oxidized bituminous coal contained within a slurry of coal and gangue, comprising the steps of dispersing a surfactant throughout the slurry, first conditioning the slurry such that the surfaces of the particles of coal are selectively coated by the surfactant to produce activated particles of coal, dispersing an ...

Electrokinetic study on the oil flotation of oxidized coal.

@article{osti_5952205, title = {Electrokinetic study on the oil flotation of oxidized coal. [Separation from ash materials and pyrite]}, author = {Wen, W W and Sun, S C}, abstractNote = {The objective of this investigation was to study the electrokinetic behavior of oxidized coals and of hydrocarbon emulsion droplets of flotation reagents to indicate the feasibility of separating …

Improving Oxidized Coal Flotation Using Biodiesel as a Collector

Oxidized coal is difficult to float using either kerosene or diesel. In this investigation, we compared the flotation results obtained using biodiesel with those using diesel as a collector. It was found that the biodiesel could improve flotation of oxidized coal. FTIR study results show that the biodiesel contains much more abundant unsaturated fatty acids than diesel and the …