Process and Composition for Froth Flotation

a technology of froth flotation and composition, which is applied in the direction of flotation, solid separation, etc., can solve the problems of increased carcinogenicity and toxicity, high toxicity of materials, and largely discontinued use of these materials

Inactive Publication Date: 2012-05-31
FILLER PAUL A +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While in the past collectors included hydrocarbons produced as coke-oven byproducts, the use of these materials has been largely discontinued since they contain phenols and other toxic aromatic hydrocarbons that pose ecological problems.
The problem with these middle distillate hydrocarbons is that they may contain significant amounts of polynuclear aromatics by up to 15% by wt., which result in increased levels of carcinogenicity and toxicity.
These materials are also highly toxic and pose problems with ground water contamination.

Method used

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  • Process and Composition for Froth Flotation
  • Process and Composition for Froth Flotation
  • Process and Composition for Froth Flotation

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025]A plant trial at a coal mine was conducted over a three day period. The equipment employed was a typical froth flotation cell operated in a continuous fashion. The slurry composition employed, i.e., the feed to the froth flotation cell, contained 8.54% by wt. solids and the balance water, approximately 50% by wt. of the solids being feed ash. The particle size of the coal was typical with 95% being between 60 and 320 mesh. The flow rate of the slurry to the cell was approximately 1,000 gal / m while the addition rate of the collector was approximately 2 ml / min. The collector used was 100% Collector A1 on day one, 80% Collector A1 on day two, and 60% Collector A1 on day three, the balance on days 2 and 3 being Collector B. Collector A1 was ODC-15 as described above and Collector B was V-154L as described above. It was found that the average recovery of coal over the test period was 80.53% by wt. with a gangue (tailings) recovery of 82.4% by wt.

example 2

[0026]The procedure of Example 1 was followed except that in this case the collector employed was a commercially available diesel. Using the diesel as a collector, coal recovery was 80.49% by wt. while gangue recovery was 81.92% by wt.

[0027]Thus it can be seen by comparing the results of Examples 1 and 2 that the collectors of the present invention perform as well as or better than conventional collectors (diesel) in terms of achieving recovery of coal.

example 3

[0028]The procedure of Example 1 was followed except that in this case the collector employed was Collector C and additionally, the slurry composition, i.e., the feed to the froth flotation cell, contained 8% by wt. solids and the balance water, approximately 45% by wt. of the solids being feed ash. The particle size of the coal was typical, 95% being between 60 and 320 mesh.

[0029]The flow rate of the slurry to the cell was approximately 5,000 gal / min while the addition rate of Collector C was approximately 200 ml / min. Using Collector C, the following results were obtained:

Tailings Ash (Gangue) 78.2% wt.Froth Ash14.86% wt.Recovery (Combustible Matter)  45% wt.Yield (Coal)53.91%

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Abstract

A method for conducting froth flotation using a collector which is primarily hydrocarbon in nature or is a mixture of hydrocarbons with certain oxygenates, the collectors being substantially free of polynuclear aromatics, sulfur and nitrogen.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of U.S. Ser. No. 11 / 658,783, filed Oct. 7, 2008 which is a 371 application of PCT / US06 / 04379 filed Feb. 8, 2006, which claims priority from U.S. Provisional Application No. 60 / 650,857 filed Feb. 8, 2005, all of which are incorporated herein by reference for all purposes.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to froth flotation of solid materials and, more particularly, to a process and composition for the froth flotation of coal, molybdenum, graphite, and other materials having hydrophobic materials.[0004]2. Description of Prior Art[0005]When coal is mined, the raw product consists of coal and rock, with rock naturally occurring as small partings within the coal that cannot be avoided during the mining process. To concentrate the coal, large fragments of non-combustible mineral / matter are removed by screening or gravity separation techniques. Froth fl...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B03D1/02B03D1/006B03D1/001
CPCB03D1/008B03D1/006B03D2201/02
InventorFILLER, PAUL A.LEWIS, DUANE J.
OwnerFILLER PAUL A