- Email: [email protected]
5544759 Procedure and apparatus for materials separation by pneumatic flotation
Patents Alert
5540336 METHOD OF PRODUCING IRON ORE CONCENTRATES BY FROTH FLOTATION Schreck Berthol; Koester Rita; GERMANY assigned to Kommanditgesellschaft auf Aktien
Duesseldorf, Henkel
PCT No. PCT/EP92/02224 Sec. 371 Date Apr. 4,1994 Sec. 102(e) Date Apr. 4, 1994 PCT Filed Sep. 25,1992 PCT Pub. No. WO83/06935 PCT Pub. Date Apr. 15, 1993. Iron ore concentrates can be obtained by the flotation of iron clres providing mixtures containing at least one ether canine of formula (I):(*See Patent for Tabular Presentation*) PS in which Rl is a linear or branched chain aliphatic hydrocarbon moiety having 6 to 22 carbon atoms and 0, 1, 2 or 3 double bonds; n and m independently of one another represent the number 1,2 or 3; x=0 or the number 1,2 or 3; and y=2 or 3, and at least one other anionic and/or nonionic collector.
5540337 ALKYLOXYALKANEAMINES USEFUL AS CATIONIC FROTH FLOTA.TION COLLECTORS Riggs William; Andress Carlos; Humble, TX, UNITED STATES assigned to Baker Hughes Incorporated A process of separating at least one mineral, e.g. silica, from an aqueous medium, e.g. one containing iron ore, by froth flotation using cationic alkyloxyalkaneamine collectors free of acrylonitrile is described. Alkyloxyalkaneamines free of acrylonitrile may be made by reacting an alcohol with an alkenenitrile having at least 4 to 13 carbon atoms. This process produces branching on the third carbon from the resulting compound, e.g. nitrogen of the 3-hexoxypentaneamine. In addition to the absence of acrylonitrile, th,e alkyloxyalkaneamines give better selectivity than some conventional etheramines.
5542545 PROCESS FOR PHOSPHATE BENEFICIATION Yu Ying X, Lakeland, FL, UNITED STATES assigned to Yu Ying Xue
653
A process is described for separation of oxidic minerals, such as phosphate. The process is a froth flotation process utilizing a novel collector, which is comprised of: 1. tall oil or any other commercial fatty acids that may contain rosin; 2. fuel oil; 3. N-substituted-N-mixed alkyoxy-propylmaleimic acid derivative; 4. fatty acid sulfonate; 5. alkyl alcohol ether sulfate; 6. alkyl alcohol sulfate;The collector is added to the aqueous slurry of phosphate ore to be conditioned in a conventional manner. The conditioning reagents include alkaline pH modifiers, such as sodium hydroxide, sodium carbonate or ammonia. The conditioning pH value is controlled at 7.0-l 1.5. After conditioning, the reagentized slurry is transferred into a flotation cell and flotation is conducted in a traditional process.
5542546 PROCESS AND APPARATUS FOR NON-AGITATED FLOTATION OF SUBSTANCES WITH A LOW DEGREE OF HYDROPHOBY AND/OR LOW STABILITY IN THE FOAM STRUCTURE, IN PARTICULAR OF SALT MIXTURES Gotte Jest; Schnez Harald; Singewald Arno; Philippsthal, GERMANY assigned to Kali und Salz GmbH A process and apparatus for pneumatic flotation include thinning a conditioned and gassified pulp and then forming them in the separation chamber into an enclosed free jet.
5544759 PROCEDURE AND APPARATUS FOR MATERIALS SEPARATION BY PNEUMATIC FLOTATION Urizar Daniel F; Santiago, CHILE The invention relates to a method and an apparatus for the separation of hydrophobic substances by froth flotation that basically consists of feeding pulp in the form of a thin layer on at least a lower gas-permeable slanted surfaces in which low pressure gas is injected generating small bubbles that collect hydrophobic particles. The froth containing concentrate is separated and washed before removal in a froth reservoir formed by a lower gas-permeable slanted surface and awall at its lower end. At the top of the wall, the froth overtlows
PatentsAlert
654
to a launder for removal. At the bottom of the wall, the pulp containing the tailings discharges through an opening. Froth washing is performed by means of baffles that force the froth to flow underneath water sprays.
air to make the heat vehicle. The ore-reducing gas is heated in downstream heat exchangers before arriving in the three sections of the reactor through the floors. Sponge iron is removed and throat gas extracted from a sponge-collecting section.
5545338 5544760 FLOTATION OF LEAD SULFIDES USING RAPESEED OIL Benn Freddy; Dattilo Mario; Cornell William L; Rolla, MO, UNITED STATES An improved method for recovering lead sulfides from a mineral deposits. Pulverized mineral deposit material is mixed with water, agitated with pH adjustment from about 8 to about 10.5 to form a slurry. Rapeseed oil is added to the conditioned shnry to render the surface of the lead sulfide particles hydrophobic. After agitating and adding a frothing agent, air bubbles are injected into the resultant composition to cause hydrophobic lead sulfide particles to become attached to the air bubbles and to rise and form a froth fraction which is then separated and recovered. The process uses substantially non-toxic rapeseed oil as a hydrophilizing agent. The process is less environmentally damaging, less costly and more specific in separating lead sulfides from iron containing minerals which are normally present in ores together with the lead sulfides.
5545251 METHOD OF AND DEVICE FOR DIRECTLY REDUCING FINE-PARTICLE ORES AND CONCENTRATES THEREOF Knop Klaus; Bottrop, GERMANY assigned to MAN Gutehoffnungshuml utte Aktiengesellschaft The present invention concerns a method of and a device for directly reducing fine-particle ore in a horizontal reactor with an ore-reducing gas and a heat vehicle, also a gas, in a fluid&d bed. The ore-reducing vessel itself comprises a horizontal fluidized-bed reactor. The ore is blown into it from below. The heated ore-reducing gas is blown into the reactor through oncoming-gas floors. The heat needed for the endothermic reaction is supplied to the reactor at different temperatures through heat exchangers and transferred to the bed. Heat is supplied counter to the ore-reducing gas. Fuel in the form of gas is burned with
METHOD FOR FILTERING MINERAL SLURRIES Ginn Michael; Cobb Gary L; Broxton Lawrence E; McNeely Kelly R; Wrightsville, GA, UNITED STATES assigned to ECC International Inc PCT No. PCT/US93/00562 Sec. 371 Date Jul. 21, 1994 Sec. 102(e) Date Jul. 21,1994 PCI Filed Jan. 19, 1993 PCI Pub. No. WG92/14205 PCI Pub. Date Aug. 20, 1992. A method for filtering an aqueous mineral slurry and collection of the mineral as product. The slurry is flowed through a filter plate of the type characterized by a porous support layer and an overlying microporous metal filtration layer, with flow through the filter plate during filtration being from the filtration layer side toward the base layer and being effected by establishing a fluid pressure differential across the filter plate. The filtration layer preferably comprises a sintered metal, with a relatively narrow pore size distribution, i.e. one wherein sub&ntially all of the pores are less than 5 mum. Discharge of the filter cake which accumulates upon the plate during filtration, is facilitated by subjecting the support layer side of the plate to one or more positive water pressure pulses, to effect a transient reverse water flow through the plate, thereby generating via the uniform pore structure of the filtration layer a uniform back pressure and a lubricating iihn of water at the interface between the filtration layer and the filter cake. Controlled oscillations or vibrations are simultaneously or shortly thereupon imparted to the surface of the porous filtration layer to facilitate separation of the filter cake.
5545384 PROCESS FOR PRODUCTION OF ALUMINUM HYDROXIDE FROM ORE CONTAINING ALUMINA Harato Taku; IshidaTakahim; Kumagae Yoshio; Inami Michikazu, Ishibashi Kazuhisa; Mnralmmi Mitsuaki; Nii JAPAN assigned to Sumitomo Chemical Co Ltd A process for the production of aluminum hydroxide from an alumina-containing ore comprising, in a
5540336 METHOD OF PRODUCING IRON ORE CONCENTRATES BY FROTH FLOTATION Schreck Berthol; Koester Rita; GERMANY assigned to Kommanditgesellschaft auf Aktien
Duesseldorf, Henkel
PCT No. PCT/EP92/02224 Sec. 371 Date Apr. 4,1994 Sec. 102(e) Date Apr. 4, 1994 PCT Filed Sep. 25,1992 PCT Pub. No. WO83/06935 PCT Pub. Date Apr. 15, 1993. Iron ore concentrates can be obtained by the flotation of iron clres providing mixtures containing at least one ether canine of formula (I):(*See Patent for Tabular Presentation*) PS in which Rl is a linear or branched chain aliphatic hydrocarbon moiety having 6 to 22 carbon atoms and 0, 1, 2 or 3 double bonds; n and m independently of one another represent the number 1,2 or 3; x=0 or the number 1,2 or 3; and y=2 or 3, and at least one other anionic and/or nonionic collector.
5540337 ALKYLOXYALKANEAMINES USEFUL AS CATIONIC FROTH FLOTA.TION COLLECTORS Riggs William; Andress Carlos; Humble, TX, UNITED STATES assigned to Baker Hughes Incorporated A process of separating at least one mineral, e.g. silica, from an aqueous medium, e.g. one containing iron ore, by froth flotation using cationic alkyloxyalkaneamine collectors free of acrylonitrile is described. Alkyloxyalkaneamines free of acrylonitrile may be made by reacting an alcohol with an alkenenitrile having at least 4 to 13 carbon atoms. This process produces branching on the third carbon from the resulting compound, e.g. nitrogen of the 3-hexoxypentaneamine. In addition to the absence of acrylonitrile, th,e alkyloxyalkaneamines give better selectivity than some conventional etheramines.
5542545 PROCESS FOR PHOSPHATE BENEFICIATION Yu Ying X, Lakeland, FL, UNITED STATES assigned to Yu Ying Xue
653
A process is described for separation of oxidic minerals, such as phosphate. The process is a froth flotation process utilizing a novel collector, which is comprised of: 1. tall oil or any other commercial fatty acids that may contain rosin; 2. fuel oil; 3. N-substituted-N-mixed alkyoxy-propylmaleimic acid derivative; 4. fatty acid sulfonate; 5. alkyl alcohol ether sulfate; 6. alkyl alcohol sulfate;The collector is added to the aqueous slurry of phosphate ore to be conditioned in a conventional manner. The conditioning reagents include alkaline pH modifiers, such as sodium hydroxide, sodium carbonate or ammonia. The conditioning pH value is controlled at 7.0-l 1.5. After conditioning, the reagentized slurry is transferred into a flotation cell and flotation is conducted in a traditional process.
5542546 PROCESS AND APPARATUS FOR NON-AGITATED FLOTATION OF SUBSTANCES WITH A LOW DEGREE OF HYDROPHOBY AND/OR LOW STABILITY IN THE FOAM STRUCTURE, IN PARTICULAR OF SALT MIXTURES Gotte Jest; Schnez Harald; Singewald Arno; Philippsthal, GERMANY assigned to Kali und Salz GmbH A process and apparatus for pneumatic flotation include thinning a conditioned and gassified pulp and then forming them in the separation chamber into an enclosed free jet.
5544759 PROCEDURE AND APPARATUS FOR MATERIALS SEPARATION BY PNEUMATIC FLOTATION Urizar Daniel F; Santiago, CHILE The invention relates to a method and an apparatus for the separation of hydrophobic substances by froth flotation that basically consists of feeding pulp in the form of a thin layer on at least a lower gas-permeable slanted surfaces in which low pressure gas is injected generating small bubbles that collect hydrophobic particles. The froth containing concentrate is separated and washed before removal in a froth reservoir formed by a lower gas-permeable slanted surface and awall at its lower end. At the top of the wall, the froth overtlows
PatentsAlert
654
to a launder for removal. At the bottom of the wall, the pulp containing the tailings discharges through an opening. Froth washing is performed by means of baffles that force the froth to flow underneath water sprays.
air to make the heat vehicle. The ore-reducing gas is heated in downstream heat exchangers before arriving in the three sections of the reactor through the floors. Sponge iron is removed and throat gas extracted from a sponge-collecting section.
5545338 5544760 FLOTATION OF LEAD SULFIDES USING RAPESEED OIL Benn Freddy; Dattilo Mario; Cornell William L; Rolla, MO, UNITED STATES An improved method for recovering lead sulfides from a mineral deposits. Pulverized mineral deposit material is mixed with water, agitated with pH adjustment from about 8 to about 10.5 to form a slurry. Rapeseed oil is added to the conditioned shnry to render the surface of the lead sulfide particles hydrophobic. After agitating and adding a frothing agent, air bubbles are injected into the resultant composition to cause hydrophobic lead sulfide particles to become attached to the air bubbles and to rise and form a froth fraction which is then separated and recovered. The process uses substantially non-toxic rapeseed oil as a hydrophilizing agent. The process is less environmentally damaging, less costly and more specific in separating lead sulfides from iron containing minerals which are normally present in ores together with the lead sulfides.
5545251 METHOD OF AND DEVICE FOR DIRECTLY REDUCING FINE-PARTICLE ORES AND CONCENTRATES THEREOF Knop Klaus; Bottrop, GERMANY assigned to MAN Gutehoffnungshuml utte Aktiengesellschaft The present invention concerns a method of and a device for directly reducing fine-particle ore in a horizontal reactor with an ore-reducing gas and a heat vehicle, also a gas, in a fluid&d bed. The ore-reducing vessel itself comprises a horizontal fluidized-bed reactor. The ore is blown into it from below. The heated ore-reducing gas is blown into the reactor through oncoming-gas floors. The heat needed for the endothermic reaction is supplied to the reactor at different temperatures through heat exchangers and transferred to the bed. Heat is supplied counter to the ore-reducing gas. Fuel in the form of gas is burned with
METHOD FOR FILTERING MINERAL SLURRIES Ginn Michael; Cobb Gary L; Broxton Lawrence E; McNeely Kelly R; Wrightsville, GA, UNITED STATES assigned to ECC International Inc PCT No. PCT/US93/00562 Sec. 371 Date Jul. 21, 1994 Sec. 102(e) Date Jul. 21,1994 PCI Filed Jan. 19, 1993 PCI Pub. No. WG92/14205 PCI Pub. Date Aug. 20, 1992. A method for filtering an aqueous mineral slurry and collection of the mineral as product. The slurry is flowed through a filter plate of the type characterized by a porous support layer and an overlying microporous metal filtration layer, with flow through the filter plate during filtration being from the filtration layer side toward the base layer and being effected by establishing a fluid pressure differential across the filter plate. The filtration layer preferably comprises a sintered metal, with a relatively narrow pore size distribution, i.e. one wherein sub&ntially all of the pores are less than 5 mum. Discharge of the filter cake which accumulates upon the plate during filtration, is facilitated by subjecting the support layer side of the plate to one or more positive water pressure pulses, to effect a transient reverse water flow through the plate, thereby generating via the uniform pore structure of the filtration layer a uniform back pressure and a lubricating iihn of water at the interface between the filtration layer and the filter cake. Controlled oscillations or vibrations are simultaneously or shortly thereupon imparted to the surface of the porous filtration layer to facilitate separation of the filter cake.
5545384 PROCESS FOR PRODUCTION OF ALUMINUM HYDROXIDE FROM ORE CONTAINING ALUMINA Harato Taku; IshidaTakahim; Kumagae Yoshio; Inami Michikazu, Ishibashi Kazuhisa; Mnralmmi Mitsuaki; Nii JAPAN assigned to Sumitomo Chemical Co Ltd A process for the production of aluminum hydroxide from an alumina-containing ore comprising, in a