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5307938 |
Treatment of iron ore to increase recovery through the use of low molecular weight polyacrylate dispersants
The described invention relates to the processing of iron ore, particularly taconite ore. In particular, the invention relates to the separation of the iron containing component from the silicious...
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5295584 |
Process for selective flotation of phosphorus minerals
The invention relates to a process for the selective flotation of phosphorus minerals, in which process the flotation collectors used are one or more compounds of the formula 1a and/or 1b ##STR1##...
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5295585 |
Method for achieving enhanced copper-containing mineral concentrate grade by oxidation and flotation
The present invention involves a method for separating a first copper-containing mineral from a second copper-containing mineral using froth flotation where one of the minerals has a more readily...
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5248041 |
Process for the separation of plastics by flotation
The invention relates to a process for separating off polyester plastics from a mixture of polyester, polyvinyl chloride and, if present, other plastics, wherein in the flotation the polyester...
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5244492 |
Process for recovery of metallic mercury from contaminated mercury-containing soil
Describes a process for separating metallic mercury from soil containing same by producing an aqueous pulp of the contaminated soil in a mixing tank (12), screening the pulp in screening means (14)...
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5221466 |
Phosphate rock benefication
This invention provides an improved method for the rougher flotation of phosphate ore using sodium carbonate to control the pH at about 9.6-10.5. The method facilitates improved recovery of...
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5182014 |
Method and apparatus for increasing flotation cell recovery and grade of complex copper-containing ores
Micron sized gas bubbles produced by electrolysis (e.g., oxygen and/or hydrogen gas bubbles by the electrolysis of water) are introduced into a flotation cell which is also provided with larger...
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5182039 |
Synergistic fluorinated ore flotation aids
Flotation aids, for use in ore flotation and beneficiation processes, comprising polyamines in the presence of fluorosubstituted organic compounds, either mixed therewith or at least...
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5180511 |
Flotation aid and process for removal of impurities from silicate minerals
A novel flotation aid for use in the flotation removal of contaminates or impurities from mineral slurries. The flotation aid is an alkali aluminate compound. The flotation aid may be incorporated...
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5171428 |
Flotation separation of arsenopyrite from pyrite
Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO 3 - ions at elevated temperature and pH below about 8 for a period sufficient to...
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5161694 |
Method for separating fine particles by selective hydrophobic coagulation
A process of selectively agglomerating coal in an aqueous environment while leaving the mineral matter dispersed has been developed. This process is autogenous for hydrophobic particles in that...
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5147528 |
Phosphate beneficiation process
A process for the froth flotation separation of phosphate containing minerals by the use of a new collector agent is described. The new phosphate collector agent is prepared by mixing a fatty acid,...
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5147572 |
Flotation composition using a mixture of collectors
The present invention relates to improved flotation composition comprising a mixture of (A) at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R 1 is...
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5130037 |
Process for the froth flotation of oxide and salt type minerals and composition
A process is provided for the froth flotation of oxide and salt type minerals utilizing as the collector a combination of a monoester of a dicarboxylic acid of the general formula ##STR1## in which...
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5126038 |
Process for improved precious metals recovery from ores with the use of alkylhydroxamate collectors
Collector compositions for use in froth flotation processes for the benefication of precious metals i.e. gold, silver and platinum group metals (PGM) from sulfide ores containing especially pyrrite...
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5124028 |
Froth flotation of silica or siliceous gangue
Silica and siliceous gangue are separated from desired mineral values, particularly iron and phosphate, by reverse froth flotation in the presence of amine collectors and effective amounts of...
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5120432 |
Process for the selective flotation of metal ores using 2-mercaptothi-azole derivatives
A process for the selective flotation of metal ores is described, wherein ionic organic collectors are utilized, which have the formula: ##STR1## where R and R 1 , like or different from each...
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5110455 |
Method for achieving enhanced copper flotation concentrate grade by oxidation and flotation
The present invention involves a method for separating copper sulfide from rimmed iron sulfide by flotation. Prior to flotation, a slurry containing the sulfides is oxidized and conditioned to...
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5106489 |
Zircon-rutile-ilmenite froth flotation process
This invention relates to a method for recovering a bulk concentrate of zircon and a bulk concentrate of rutile-ilmenite from dry plant tailings. A process has been discovered for froth flotation...
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5094746 |
Flotation process using a mixture of collectors
The present invention relates to improved process for beneficiating an ore-containing sulfide material. In particular, the process is useful for beneficiating ores and recovering metals such as...
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5084254 |
Natural calcium carbonate ores
There is disclosed a process for purifying a calcium carbonate-containing mineral which process comprises the following steps: a) mixing the calcium carbonate-containing mineral with water and a...
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5078860 |
Sequential and selective flotation of sulfide ores containing copper and molybdenum
A sequential flotation process for the separation of components of an ore containing sulfides of copper and molybdenum involves initially effecting selective flotation of the copper component...
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5074993 |
Flotation process
A method of flotation of sulfides wherein pyrrhotite is depressed by use of a water-soluble polyamine while non-ferrous metal-containing sulfide or sulfidized minerals are floated selectively.
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5068028 |
Molybdenite flotation from copper sulfide/molybdenite containing materials by ozone conditioning
A process for recovering molybdenite from feed materials containing copper sulfide and molybdenite (e.g. copper/molybdenum concentrates from flotation processes) wherein the feed material is...
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5057209 |
Depression of the flotation of silica or siliceous gangue in mineral flotation
A flotation process is disclosed wherein the selectivity to the valuable mineral is improved by the depression of silica or siliceous gangue by the use of a hydroxy-containing compound such as an...
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5051165 |
Quality of heavy mineral concentrates
The specification discloses a process for substantially reducing the radioactivity of heavy mineral concentrates or mineral mixtures. The process comprises the removal of radioactive minerals...
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5049612 |
Depressant for flotation separation of polymetallic sulphidic ores
A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with conventional collector agents and forthing agents in the...
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5047144 |
Process for the separation of minerals by flotation
The present invention provides a process for the separation of minerals by flotation in the presence of activators and suppressors. Activators are cation-active condensation products and...
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5030340 |
Method for the depressing of hydrous silicates and iron sulfides with dihydroxyalkyl polysaccharides
A process for the recovery of mineral values from base metal and precious metal ores is disclosed. Specifically, a froth flotation process is disclosed which comprises contacting an aqueous ore...
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5022983 |
Process for cleaning of coal and separation of mineral matter and pyrite therefrom, and composition useful in the process
A flotation process is disclosed for cleaning of particulate coal and separation therefrom of pyrite and ash. A flotation pulp is prepared comprising a particulate coal feed material and an anionic...
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5019246 |
Frothing procedure using polymeric sulfide mineral depressants
Various acrylic acid allyl/thiourea polymers and their use as depressants in the beneficiation of sulfide minerals from ores are disclosed.
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5011596 |
Method of depressing readily floatable silicate materials
The invention resides in the use of a bacterial cellulose as a depressant for readily flotatable silicate minerals in an ore flotation process. Depending on the particular ore being treated, from...
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5008006 |
Chemical conditioning of fine coal for improved flotation and pyrite rejection
A method for separating ash and sulfur (including pyritic sulfur) contaminants from coal in a flotation process. The method comprises the steps of grinding the coal to small particlate size,...
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4997550 |
Method for improved flotation of discoloring impurities from kaolinite
Flotation of a kaolin clay slurry to remove titanium-based impurities is improved by adding a biocide to the slurry prior to the flotation and effecting the flotation in the presence of the...
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4995998 |
Surfactant mixtures as collectors for the flotation of non-sulfidic ores
Fatty alcohol polyglycol ethers terminally blocked by hydrophobic radicals are used as co-collectors together with cationic or ampholytic surfactant components in the flotation of non-sulfidic ores.
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4966688 |
Ore flotation employing amino mercaptothiadiazoles
A process for separating and recovering minerals, such as molybdenum or graphite, from ores with which they occur by addition of an amino mercaptothiadiazole to an ore flotation process.
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4952329 |
Separation of polymetallic sulphides by froth flotation
A new depressant composition is provided for the enhanced separation into separate value metal concentrates of copper, nickel, zinc, lead present in polymetallic and massive sulphide ores. The...
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4948512 |
Multistep method for separating dissolved organic compounds from a solution
A process for separating dissolved organic solutes from a solution is provided. The process includes the steps of mixing the solution with a surfactant in order that the surfactant adsorbs...
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4946597 |
Low temperature bitumen recovery process
A low temperature process for separating bitumen from tarsands comprises slurrying tarsands in water at a temperature in the range of above about freezing to 35° C., preferably in the range of 2°...
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4915706 |
Coal-water fuel production
A process and apparatus for producing coal-water fuel comprises crushing and primary grinding of the coal to form a liberated granular material, multiple stage froth flotation of the granulated...
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4904375 |
Sodium silicate as a phosphate flotation modifier
This invention is directed to an improved froth flotation separation for beneficiating phosphate containing ores wherein an ore is preliminarily conditioned with an anionic agent and then subjected...
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4904373 |
Fossil resin flotation from coal by selective coagulation and depression of coal
disclosed is a process for separating resin from a mixture of resin-bearing coal particles by increasing the pH of a froth flotation process to a value of at least 12. Particles of reduced size...
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4888106 |
Method of using polymeric sulfide mineral depressants
Various acrylamide/allyl thiourea polymers and their use as depressants in the beneficiation of sulfide minerals from ores are disclosed.
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4883586 |
Process for beneficiating ores containing fine particles
Ores containing mineral values are separated into two slurries, one having primarily fine particles and gangue and the other having primarily coarse particles. The slurry having fine particles and...
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4879022 |
Ore flotation process and use of mixed hydrocarbyl dithiophosphoric acids and salts thereof
The present invention relates to an improved process for beneficiating an ore containing sulfide materials with selective rejection of pyrite, pyrrhotite and other metals and gangue. In particular,...
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4877518 |
Ore flotation employing dimercaptothiadiazoles
A process for separating and recovering minerals, such as molybdenum or coal, from ores with which they occur by addition of a dimercaptothiadiazole to an ore flotation process.
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4874534 |
Method for removal of organic solvents from aqueous process streams
An improved method of separating organic solvents from aqueous process streams is disclosed in connection with a copper solvent extraction/electrowinning process. An aqueous solution having...
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4867867 |
Recovery in the phosphate ore double flotation process
This invention relates to a method of enhanced recovery of phosphate in the double flotation process for the benefication of phosphate ore, more particularly to the use of pH modifiers-silica...
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4867868 |
Selective flotation of inorganic sulfides from coal
Pyritic sulfur is removed from coal or other carbonaceous material through the use of humic acid as a coal flotation depressant. Following the removal of coarse pyrite, the carbonaceous material is...
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4866150 |
Polymeric sulfide mineral depressants
Various acrylamide/allyl thiourea polymers and their use as depressants in the beneficiation of sulfide minerals from ores are disclosed.
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