Beneficiation of coal and metallic and non-metallic ores by froth flotation process using polyhydroxy alkyl xanthate depressants
In the concentration of metallic and non-metallic minerals by froth flotation with a high content of pyrite and the like iron sulfides, which includes the subjecting of such ores when finely ground and sized to substantially liberate particles of pyrite, to froth flotation process in the presence of any suitabl E and adeuqate collector and frother for desired metallic and non-metallic mineral for the recovery of the same, and in the presence of a polyhydroxy alkyl xanthate wetting and depressing agent for pyrite, the step of adding to a pulp of mineral slurry an amount of the order of 0.01 to 0.10 kg per metric ton of a non-collecting polyhydroxy alkyl xanthate, of which hydroxyl groups of said polyhydroxy alkyl xanthates contain from 3 to 4, and having the following general formula: HOCH/sub 2/(CHOH)mcH(CHO)OCSSK wherein M is an integer from 2 to 3; said polyhydroxy alkyl xanthates, react with pyrite and said iron sulfides of the pulp of mineral slurry to yield a water soluble or insoluble hydrophilic coating depressing the pyrite and said iron sulfides, said polyhydroxy alkyl xanthates being selected from the group consisting of potassium pentose, and potassium hexose xanthates, such as potassium arabinose xanthate, potassium xylose xanthate, potassium glucose xanthate, potassium fructose xanthate.
- Assignee:
- IFI; ERA-06-000018; EDB-80-120839
- Patent Number(s):
- US 4211642
- OSTI ID:
- 5046776
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DESULFURIZATION
ENERGY SOURCES
FLOTATION
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MARCASITE
MATERIALS
MINERALS
ORES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PYRITE
PYRITES
REMOVAL
SEPARATION PROCESSES
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
TRANSITION ELEMENT COMPOUNDS
XANTHATES