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Arr-maz Custom Chemicals, Inc.

George M Lilley

Guoxin Wang

Francisco J Sotillo

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

The method of beneficiating phosphate tailings and debris waste material is disclosed for producing enriched phosphate ore and a sand product which is usable for glass, cement and the like or for land reclamation. The method includes treating the phosphate tailings and waste material with a cationic reagent and subjecting the tailings and waste material to a flotation process to overflow the sand product therefrom. The underflow phosphate ore is subjected to a conventional double flotation process to produce a high grade phosphate product. The sand product may either be directly pumped into an existing phosphate quarry for land reclamation or may be deregentized and treated with anionic reagents to remove remaining impurities providing a sand product suitable for glass, cement and the like.

Process to beneficiate phosphate and sand products from debris and

A method is disclosed for improving the recovery of a conventional single or double stage flotation process for the benefication of phosphate ore. The method includes treating the discarded froth product of the conventional phosphate proces with waste slime from the flotation process. The slime and froth product is agitated to completely deactive the cationic reagent prior to the anionic treatment with new phosphate ore in a conventional flotation process.

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Lakeland, FL, United States of America

George M Lilley