Reduction of pH modifying agent in the flotation of copper miner

Details Reduction of pH modifying agent in the flotation of copper miner Reduction of pH modifying agent in the flotation of copper miner

1998-07-13

2000-07-25

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209166, 209167, B03D 102, B03B 104, B03B 100

Patent

active

06092666&

ABSTRACT:
A method is provided for reducing the consumption of alkaline pH modifier in a mineral separation circuit which employs sulfoxy radical-containing reagents. The method comprises the addition of a non-oxidizing gas to the mineral separation circuit prior to and/or simultaneously with the addition of the sulfoxy radical-containing reagent. The non-oxidizing gas is added in a quantity sufficient to achieve a chemical environment conducive to the flotation separation of minerals. The inventive process is suitable for a wide range of valuable minerals including sulfidic copper minerals or mixtures of sulfidic and non-sulfidic copper minerals, sulfidic iron minerals (particularly pyrite) and non-sulfidic gangue material. It is particularly suitable for sedimentary copper deposits, copper skarns, porphyry copper/molybdenum/gold deposits and super gene enrichments.

REFERENCES:
patent: 1505323 (1924-08-01), Eberenz
patent: 2154092 (1939-04-01), Hunt
patent: 4735783 (1988-04-01), Bulatovic
Xu et al., "Sphalerite Reverse Flotation Using Nitrogen," Proc. Electrochem Soc., vol. 92-17, Proc. Int. Symp. Electrochem. Miner. Met. Process. III, 3rd, pp. 170-190 (1992).
Kongolo et al., "Improving the efficiency of sulphidization of oxidized copper ores by column and inert gas flotation," Proceedings of COPPER 95--COBRE 95 International Conference, vol. II, The Metallurgical Society of CIM, pp. 183-196, 1995.

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