Abstract:
Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.
Abstract:
Agent for dressing phosphate ores The invention relates to a flotation agent for phosphate ore, comprising a fatty acid as collector and alkoxylated alkylphenols as dispersing agents, characterized in that the alkylphenols are composed of a) 8 to 20% by weight of one or more dialkylphenols having alkyl radicals from 8 to 12 carbon atoms b) 80 to 92% by weight of one or more monoalkylphenols having alkyl radicals from 8 to 12 carbon atoms, which have been alkoxylated with 2 to 6 mol of ethylene oxide.
Abstract:
In accordance with the present invention, there is provided a method of improving the separation of mineral values from their associated gangue. The method itself involves the addition of an effective amount of a treatment reagent to the froth flotation process which enhances the ore recovery. The treatment reagents of the method of the present invention comprise water-soluble organophosphonates which when added to the flotation feed slurry enhance the recovery of ore values thertefrom. The organophosphonate treatment reagent may be used alone or in combination with a polymeric dispersant.
Abstract:
An improved method for purifying titania contaminated kaolin clay by froth flotation which features the use an hydroxamate flotation collector at a neutral or mildly alkaline pH wherein a slurry of the impure clay is conditioned for the flotation step in a baffled conditioning apparatus provided with mean for imparting sufficient mechanical energy to heat a dispersed slurry of the impure clay before flotation.
Abstract:
Kaolin clays are conditioned for the removal of colored titaniferous impurities by (A) first mixing the kaolin clay with a collector to condition the impurities, in the absence of a dispersant, but in the presence of sufficient water to yield a mixture having a solids content of at least 65 percent by weight and (B) then deflocculating the kaolin clay mixture at a pH of at least 4.0 with a dispersant in amounts sufficient to yield a kaolin clay slurry which is suitable for subsequent processing to remove colored titaniferous impurities.
Abstract:
An improved flotation process for removal of colored titaniferous impurities from kaolin clay uses as collector a hydroxamate compound, or a mixture of compounds, having the formula ##STR1## in which R is an alkyl, aryl, or alkylaryl group having 4-28, and preferably 6-24 carbon atoms, and M represents an alkali metal, an alkaline earth metal or hydrogen. The process does not require the use of activators to make the collector adsorb selectively on the colored impurities.
Abstract:
A method for separating inorganic gangues from coal particulates dispersed in a coal refuse slurry comprises the selective flocculation of the coal refuse slurry by initially adding an anionic dispersant followed subsequently by adding an anionic flocculant, allowing the flocculating coal slurry obtained to settle and collecting a concentrated settled coal slurry having a lowered ash value. The dispersed inorganic gangues may be recovered by the addition of a cationic flocculant/coagulant with subsequent recycle of the aqueous phase.
Abstract:
A method for removing inorganic sulfides from finely ground, non-sulfide minerals is provided. A polymeric agent having a molecular weight of from about 1,000 to about 300,000 and with a plurality of xanthate groups per molecule is admixed into an aqueous suspension including inorganic sulfides and non-sulfide minerals. The polymeric agent adsorbs onto the inorganic sulfides and maintains them as a dispersion while the remaining minerals are selectively separated, as by flocculation.