Another essential feature of the flotation process is that the ore pulp is deflocculated with an alkaline dispersing agent during the flotation and the flotation is carried out in an alkaline pulp.
Talc Beneficiation Process Flotation Talc Market Specifications Talc has a wide variety of uses and markets specifications for which call for certain standards of grain size shape color chemical and mineral composition weight per unit volume oil absorption and hardness.
Aug 15 1972nbsp018332TALC BENEFICIATION United States Patent 3684197 Abstract A novel method of preparing talc powder compositions by selectively exfoliating platy talc ore to produce a unique low bulk density platy high slip and lusterous powder base composition Talc is a magnesium silicate mineral having natural flotability and by this property it.
The preparation of fatty acid alkanolamides including those of the type employed in carrying out the present in 3 vention is described in US 2 094 609 to Wolf Kritchevsky US 2 173 909 also to Kritchevsky deals with the use of fatty acid alkanolamides in ore flotation.
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In putting my invention into practice the ore may be coarsely ground by conventional means such as a jaw crusher and milled to a size e g minus 200 mesh sufiicient to liberate the mineral values When using whole ore it is preferable to wet mill the crushed ore in order to prevent smearing of the gangue by talc which would reduce talc recovery.
As an alternative to the addition of the dispersant in the grinding circuit the dispersant may be added to a pulp of the ground ore In this case the pulp should be thoroughly agitated conditioned with the dispersant.
It is also within the scope of this invention to incorporate a small amount e g from 0 1 to 1 lb ton of a water soluble polyvalent metal salt preferably an aluminum salt into the pulp before the pulp is conditioned with a frother The salt may be incorporated into a dilute solution of sodium silicate dispersant to form a stable hydrosol before the pulp is dispersed with the sodium silicate Reference is made to my copending application Ser No 415 503 filed Dec 2 1964 now US 3 337 048 for a detailed description of the preparation of the hydrosols.
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Talc Beneficiation Process Flotation Talc Market Specifications Talc has a wide variety of uses and markets specifications for which call for certain standards of grain size shape color chemical and mineral composition weight per unit volume oil absorption and hardness The paint industry is by far the largest user of talc but the Get Price.
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