Arr-maz Products. L.p.

Arr-maz Custom Chemicals, Inc.

Guoxin Wang

Zhengxing Gu

Timothy Cameron

Yu Xiong

Lucas R Moore

George M Lilley

Edward W Gannon

David Taylor

Francisco J Sotillo

Kevin Price

Jeffrey Walker

A process of phosphate flotation comprising: pulping phosphate ore with water to about 55% to 75% solids to produce an ore slurry; conditioning the ore slurry with a new reagent scheme to produce a conditioned slurry; subjecting the conditioned slurry to flotation to produce an underflow and an overflow; and collecting the overflow as phosphate concentrate. The new reagent scheme may comprise a combination of fatty acid, fuel oil, and fatty acid soap, and may not comprise a pH modifier. The process may also work effectively at a lower percent solids than conventional reagent schemes.

Reagent scheme for sedimentary phosphate flotation

The invention is related to a flotation process using an improved collector to remove alkaline earth metal carbonate impurities from phosphate ores. The flotation feed may be conditioned with the improved carbonate collector at acidic pH, and subjected to a reverse flotation. The cell overflow may be collected as waste in which carbonate minerals dominate, and the cell underflow may be the phosphate concentrate. The collector may be a combination of chemicals, comprising: (1) any kind of fatty acids, either conventional fatty acid, saponified fatty acid, or modified fatty acid; (2) chemicals with sulfonate or sulfate groups, such as dodecylbenzene sulfonic acid (DDBSA) or its salt, sodium dodecyl sulfate (SDS), sodium lauryl sulfate (SLS), sodium coco sulfate (SCS), etc.; and (3) phosphorous-bearing chemicals, such as sodium tripolyphosphate (STPP), sodium hexametaphosphate (SFMP), trisodium phosphate (TSP), Tetrasodiumpyrophosphate (TSPP), etc. With the improved collector, the separation selectivity and phosphate recovery may be significantly improved.

Collector for beneficiating carbonaceous phosphate ores

A method of removing impurities from silicates or clays through selective flocculation. The method comprises mixing a chemical product with silicates or clays, where the chemical product comprises a copolymer of acrylic acid, acrylamide, or a combination of acrylic acid and acrylamide with at least one of the following monomers: hydroxyl ethyl methacrylate, 2-acrylamido-2-methyl propane sulfonic acid, and/or 3-allyloxy-1,2-propanediol, or a derivative thereof; allowing impurities to separate from the silicates or clays; and removing the impurities from the silicates or clays. The chemical product may further comprise tannic acid, where the active tannic acid to active polymer concentration is 1% to 25% tannic acid, or more particularly 1% to 5% tannic acid.

Selective flocculation of impurities from silicates and clays

All natural defoaming compositions useful in high strength acid media utilizing phosphatide emulsifiers that are considerably more effective at reduced application rates than prior art compositions are described.

Defoaming composition for high acid strength media

Some mineral processing plants encounter difficulties in dewatering pulps using clarifier/thickener (C/T) equipment due to a layer of fine particles, air bubbles and chemicals formed at the top of the liquid in the thickener. Such layers are very stable and form a cap on the C/T. The dewatering performance of the C/T then deteriorates under these conditions, and a high percentage of solids is contained in the thickener overflow. A process for removing water from rock slurry containing a wide range of particle sizes in mineral processing operations has been developed. The process includes: (a) classifying the feed slurry into two size fractions, namely a coarse fraction and a fine fraction, (b) treating the fine fraction (and the coarse fraction if required) with a selected flocculant, and (3) thickening the flocculated slurry in sedimentation equipment to separate liquid from solids.

Enhancing sedimentation performance of clarifiers/thickeners

This invention relates to the pH modifier in alkaline froth flotation processes to treat oxide and semi-soluble salt ores, such as phosphates, sulfates, carbonates and halides, to increase the recovery while generally maintaining or improving selectivity, thus the grade of desired minerals. The invented pH modifier is used to replace traditional alkaline pH modifiers - hydroxides, carbonates and bicarbonates, such as sodium hydroxide, sodium carbonate, lime and ammonia in anionic flotation processes. The pH modifier is aqueous solution, comprised of combinations of sodium hydroxide, sodium carbonate, and sodium silicate, along with sulfonated surfactant products, such as sulfonated petroleum oil, fatty acids, alkylates, ethoxylated alcohol ethers, and also sulfosuccinamates; and anionic polymers. The pH modifier is also used as a promoter for anionic collectors and as a depressant for gangue minerals.

Froth flotation process with pH modification

A process for use in a phosphate ore beneficiation process to minimize the long-term environmental impact of the use of petroleum based hydrocarbon materials mixed with fatty acid based primary floatation reagents for froth flotation in the flotation of phosphate ores, wherein the process comprises substituting the petroleum based hydrocarbon materials with methyl and/or ethyl esters of fatty acids.

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Lakeland, FL, United States of America

Guoxin Wang