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4857174 |
Method of beneficiating phosphate ores
A method of beneficiating a phosphate ore containing apatite and dolomite impurities consisting of reagentizing a sample of the ore with an aqueous solution containing a cationic collector and...
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4853114 |
Method for the depressing of hydrous, layered silicates
A process for the recovery of mineral values from base metal ores is disclosed. Specifically, a froth flotation process is disclosed which comprises contacting an aqueous ore slurry with an...
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4830739 |
Process and composition for the froth flotation beneficiation of iron minerals from iron ores
A process and composition are provided for the froth flotation beneficiation of iron minerals from iron ores containing silicate and phosphate minerals, comprising as collectors a combination of a...
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4830740 |
Pyrite depressants useful in the separation of pyrite from coal
The separation of coal from pyrite is enhanced by the use of an effective amount of a polymeric acid or salt thereof as a pyrite depressant in conventional flotation processes. The polymeric acid...
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4822483 |
Collector compositions for the froth flotation of mineral values
A collector composition for use in froth flotation processes comprises two collectors. One of the collectors is preferably an N-(hydrocarbyl)-alpha, omega-alkanediamine, an (omega-aminoalkyl)...
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4808301 |
Flotation depressants
The flotation of desired mineral ores is selectively depressed by the use of an effective amount of a polycarboxylic acid or salt thereof in a reverse flotation process. As an example, the...
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4806234 |
Ore flotation
A polyamine substituted dithiocarbamate composition is provided. Also provided are minerals depressant compositions for recovering mineral values from an ore or concentrate wherein the values are...
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4804462 |
Beneficiating dolomitic phosphate ores with humic acid
A phosphate ore flotation process for subjecting a phosphate ore containing dolomitic impurities to beneficiation as follows: The flotation feed is first conditioned with fatty acid and fuel oil as...
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4775627 |
Coal desulfurization using bacteria adaptation and bacterial modification of pyrite surfaces
The invention relates to the desulfurization of high sulfur coal, and specifically to the removal of pyrite from high sulfur coal via separation processes based on relative hydrophobicity. The...
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4747940 |
Ore flotation and tri-alkali metal-di(carboxyalkyl) dithiocarbamate and triammonium-di(carboxyalkyl) dithiocarbamate flotation agents for use therein
Tri-alkali metal di(carboxyalkyl) dithiocarbamates and triammonium-di(carboxyalkyl) dithiocarbamates which can be characterized by the formula ##STR1## wherein R and R' can be the same or different...
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4747941 |
Increased reduction of magnesium content by use of inorganic promoters during beneficiation of phosphate ores by flotation
A process for beneficiating phosphate containing ores, wherein promoter reagents are added to the ore slurry prior to the addition of collectors and depressants for flotation of the carbonate and...
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4744892 |
Process for dressing kaolinite by flotation
Process for the selective separation of kaolinite and feldspar by flotation in aqueous pulp, wherein flotation is carried out at the pH-value of the pulp which is naturally obtained during...
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4737273 |
Flotation process for recovery of phosphate values from ore
A process for recovering phosphate values from silica-containing phosphate ores is provided. The ore has a particle size in the range of about 0.6 to 1.2 mm and is subjected to selective flotation...
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4735710 |
Beryllium flotation process
A process and reagents are described for separating beryllium silicate concentrates by flotation from oxidic minerals. The process is especially suitable for the separation of phenacite and...
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4724071 |
Selective resin flotation from coal by controlled oxidation
Disclosed is a process for separating resin from reduced size resin-bearing coal particles by treating the particles with ozone. Particles of reduced size resin-bearing coal are preferably mixed...
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4724075 |
Flotation tank
A flotation tank which is elongate and is divided along its length into individual compartments. Injectors (2) for each compartment are connected laterally to the tank (1) approximately 30 cm to 50...
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4720339 |
Flotation beneficiation process for non-sulfide minerals
An improved method of separating non-sulfide value minerals from non-sulfide ores is disclosed. The improved method includes the step of adding a depressant selective for siliceous gangue minerals...
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4719009 |
Silica depressant in froth flotation of sulfide ores
Certain water dissipatable polyester materials containing ether groups and metal sulfonate groups are useful as depressants for siliceous gangue in the froth flotation separation of zinc sulfide...
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4710361 |
Gold recovery by sulhydric-fatty acid flotation as applied to gold ores/cyanidation tailings
Gold values are obtained from gold cyanidation tailings or gold bearing ores by treating the same with a flotation collector consisting of 5 to 20% xanthate collector and 80 to 95% fatty acid...
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4708819 |
Reduction of vanadium in recycle petroleum coke
An aqueous dispersion of unreacted particulate petroleum coke substantially comprising carbon and containing a small amount of ash substantially comprising vanadium constituents and other materials...
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4702822 |
Novel collector composition for froth flotation
This invention relates to a novel composition which is useful as a collector for the recovery of nonferrous metal-containing sulfide minerals and sulfidized metal-containing oxide minerals from...
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4702821 |
Ore flotation and di-alkali metal-di(carboxyalkyl)dithiocarbamate and diammonium-di(carboxyalkyl)dithiocarbamate flotation agents for use therein
Carboxyalkyl dithiocarbamates which can be characterized by the formula ##STR1## wherein R is selected from the group consisting of alkylene radicals, wherein R' is selected from the group...
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4702824 |
Ore and coal beneficiation method
This invention relates to a method of beneficiating coal or mineral ores containing a metaliferous sulfide, e.g. iron sulfide or pyrite, and comprises removal of unwanted components, including...
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4697744 |
Process for the production of iron oxide fine powder
A process for producing iron oxide fine powder of high purity from an oxide iron ore such as hematite or magnetite by only physical processing is disclosed, which comprises the steps of: providing...
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4690752 |
Selective flocculation process for the recovery of phosphate
A process for separating and recovering non-metallic minerals, particularly phosphate, from an ore containing non-uniform sized particles, including colloidal particles. The ore is slurried in an...
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4686033 |
Trithiocarbonates as flotation reagents
The efficiency of metals separation using ore flotation is improved by the use of certain substituted hydrocarbylene trithiocarbonates as suppressants for undesired metals.
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4681700 |
Partial oxidation of upgraded petroleum coke
An aqueous dispersion of unreacted particulate petroleum coke substantially comprising carbon and containing a small amount of ash substantially comprising vanadium constituents and other materials...
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4663279 |
Method of beneficiation of complex sulfide ores
A method of beneficiation of complex sulfide ores comprises crushing and grinding complex sulfide ore containing sulfides of copper, zinc, iron and other minerals, subjecting the ground ores to...
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4657669 |
Depressants for froth flotation
The invention concerns the use of 5-hydroxy-3-thiazolidine-2-thiones of the structure I ##STR1## where R 1 =(CHOH) m , R 2 =(CHOH) n where (m+n)=0 to 6, and R 3 is alkyl or hydroxy-alkyl as...
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4650568 |
Trithiocarbonates as depressants in ore flotation
Polyhydroxytrithiocarbonates can be used as depressants in ore flotation.
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4650569 |
Process for the selective separation of base metal sulfides and oxides contained in an ore
The present invention comprises a process for the separation of ore components by flotation comprising: grinding ore to form pulp, mixing said pulp with sulfide ions and cyanide ions, adjusting the...
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4648966 |
Process for beneficiation of dolomitic phosphate ores
An improved phosphate ore beneficiation process wherein phosphate ore containing coarse, weathered dolomite in the flotation feed thereof is subjected to beneficiation as follows: The flotation...
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4640789 |
Ore flotation and flotation agents for use therein
Ammonium dialkylaminoalkyl (thiocarbonyldithio) alkanoates, alkali metal dialkylaminoalkyl (thiocarbonyldithio) alkanoates, their use as flotation agents, and a process for the production of these...
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4636303 |
Beneficiation of dolomitic phosphate ores
A phosphate ore beneficiation process wherein phosphate ore containing coarse, weathered dolomite in the flotation feed thereof is subjected to beneficiation as follows: Said feed is sent to...
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4617111 |
Method for the separation of a mixture of polyvinyl chloride and polyethylene terephtalate
A method for the separation of a mixture of polyvinyl chloride particles and polyethylene terephtalate particles comprising the steps of applying a solution composed of a low density solvent of...
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4613430 |
Froth flotation separation method and apparatus
An improved froth flotation installation for separating solid particles from an aqueous slurry by delivering a stream of the aqueous slurry directly into a vortex chamber along with a supply of...
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4595538 |
Tri-alkali metal-di(carboxyalkyl)dithiocarbamate and triammonium-di(carboxyalkyl)dithiocarbamate flotation agents
Tri-alkali metal di(carboxyalkyl) dithiocarbamates and triammonium-di(carboxyalkyl) dithiocarbamates which can be characterized by the formula ##STR1## wherein R and R' can be the same or different...
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4584118 |
Metal trithiocarbonates as depressants
Metal trithiocarbonates such as Na 2 CS 3 are useful depressant for such sulfided minerals as copper and iron sulfides in molybdenum recovery.
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4584096 |
Process to beneficiate phosphate and sand products from debris and phosphate tailing ores
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...
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4575419 |
Differential flotation reagent for molybdenum separation
A dry differential flotation reagent for molybdenum-bearing ore is disclosed comprising from about 1 to about 30 percent by weight of NaSH, 0 to 20 percent by weight of NaOH, 60 to 90 percent by...
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4568454 |
Beneficiation of high carbonate phosphate rock
The amount of carbonate mineral impurities is reduced in aqueous phosphate rock slurry by (a) conditioning the slurry with an effective amount of CO 2 , (b) adding an effective amount of an anionic...
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4561984 |
Trithiocarbonate flotation reagents
The efficiency of metals separation using ore flotation is improved by the use of certain substituted hydrocarbylene trithiocarbonates as suppressants for undesired metals.
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4554137 |
Enrichment of minerals by flotation and collector agents employed for this purpose
Process of enrichment of minerals by flotation by means of a collector comprising a thio-compound, the thio-compound being a straight or branched dialkyl or dialkenyl polysulphide.
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4552652 |
Method for removing inorganic sulfides from non-sulfide minerals
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...
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4549959 |
Process for separating molybdenite from a molybdenite-containing copper sulfide concentrate
A process for selectively separating molybdenum from a molybdenite-containing copper sulfide concentrate by a flotation process wherein the molybdenite is selectively floated by the use of a...
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4548673 |
Method and apparatus for deinking
A method and apparatus for deinking a fibre stock or slurry. In order to optimize the separation process the invention proposes to independently control the air injection phase, the mixing phase,...
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4545898 |
Process for froth flotation
A process for froth flotation of phosphate ore with a high content of carbonate, carried out in the presence of a hydrophilic polysaccharide and an amphoteric compound.
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4533466 |
Polycarboxylic acid derivatives and uses
Mercapto polycarboxylic acids, especially the trithiocarbonate derivatives thereof and alkali metal salts, are employed as treating agents in mineral recovery operations.
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4533465 |
Low molecular weight copolymers as depressants in sylvinite ore flotation
Low molecular weight copolymers of the general formula: ##STR1## exhibit excellent concentrative action in the flotation of sylvinite ores thereby resulting in improved selectivity and recovery of...
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4518573 |
Differential flotation reagent and method of preparation
A dry differential flotation reagent for molybdenum-bearing ore is disclosed comprising from about 1 to about 30 percent by weight of NaSH, 0 to 20 percent by weight of NaOH, 60 to 90 percent by...
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