106 results about "Froth flotation" patented technology

The invention provides a dosage prediction method and system based on multi-mode flotation froth digital characterization, and relates to the technical field of froth flotation. The method comprises the following steps: collecting multi-modal data of a foam state in a metal ore flotation process, wherein the multi-modal data comprises an RGB image, a video sequence and a three-dimensional point cloud; constructing three foam feature extraction networks, and respectively extracting RGB features, video dynamic features and three-dimensional point cloud features of the multi-modal data; fusing the extracted RGB features, the video dynamic features and the three-dimensional point cloud features based on a cross-modal attention mechanism to generate multi-modal features; constructing an expert knowledge base, wherein the expert knowledge base comprises structured rules and historical cases; and constructing a dosage decision model based on an expert knowledge base and a large language model, converting the multi-modal features into standardized vector representation, retrieving the expert knowledge base by utilizing similarity matching, and generating a dosage adjustment strategy. According to the invention, accurate prediction from foam multi-mode characteristics to dosage adjustment can be realized.

The invention discloses a normal-temperature efficient recovery method for low-grade tungsten in gold, antimony and tungsten multi-metal symbiotic ore. The method comprises the steps that raw ore is ground and then subjected to shaking table reselection, reselected concentrate, reselected middling and reselected tailings are obtained, foam flotation is conducted on the reselected middling, sulfide ore is floated out, coarse-grain tungsten minerals are recycled through reselection of the flotation tailings, ore grinding is conducted on the reselected tailings, gold and antimony bulk flotation is conducted, then scheelite flotation and tungsten concentrate flotation are conducted under the action of a combined collecting agent, and finally tungsten concentrate is obtained. According to the method, aiming at the characteristic that the granularity of the tungsten mineral in the gold-antimony-tungsten symbiotic ore is uneven in thickness distribution, a proper ore grinding separation process and proper ore grinding fineness are selected, the tungsten mineral is prevented from being over-crushed, and underground wastewater is reasonably utilized, so that the use amount of clear water is effectively reduced, and meanwhile, the underground wastewater is recycled; furthermore, an ore pulp heating process is omitted in the tungsten ore concentration stage, the fuel cost is greatly reduced, and therefore the production cost is greatly reduced on the premise that the tungsten concentrate recovery rate is guaranteed.

The utility model discloses an efficient polymetallic ore sorting device, relates to the technical field of froth flotation equipment, aims to solve the problem of mixing efficiency, and comprises a main body, a driving mechanism, a motor frame and a froth scraping frame, the motor frame is arranged above the main body, the driving mechanism is arranged on the motor frame, and the froth scraping frame is arranged on the main body. The foam scraping frame is installed on the upper portion of the interior of the main body, the driving mechanism is connected with the foam scraping frame, the main body comprises a base, a mixing bin and a separating bin, the mixing bin is installed above the base, the separating bin is arranged above the mixing bin, and the separating bin and the mixing bin are machined into a whole. Through cooperative use of the pressurizing cover and the baffle, efficient circulation and washing of ore pulp are achieved, the flotation efficiency is improved, the design of the annular groove and the through holes enables the ore pulp flowing in the annular direction to be sprayed, the contact area of the bubbles and the ore pulp is increased, and the flotation effect is improved.

The utility model discloses a coal mine flotation froth mobile identification device, which relates to the technical field of froth flotation, and comprises a mobile assembly, an automatic identification probe and a cleaning assembly, and the cleaning assembly is arranged above the automatic identification probe; the cleaning assembly comprises an air heater, a cleaning brush assembly and a transverse driving assembly, the air heater and the cleaning brush assembly are installed at the bottom end of the transverse driving assembly, the cleaning brush assembly is used for cleaning the automatic recognition probe, the transverse driving assembly comprises a transverse plate installed on the moving assembly, and the transverse plate is arranged above the automatic recognition probe. The transverse plate is slidably sleeved with a connecting plate, an air heater and a cleaning brush assembly are installed at the bottom end of the connecting plate, an inverted L-shaped frame is installed at the top end of the moving assembly, and a driving part is movably installed between the connecting plate and the L-shaped frame; the problems that in the prior art, after foam is scraped out by a foam scraping plate, water flow sprayed on the side conveys the foam together, in the spraying process, the water flow impacts a concentrate tank, water flow splashed on the tank wall is prone to being sprayed to an automatic recognition probe, and the recognition effect of the probe is affected are solved.

Modifier compositions, improved sparge compositions for froth flotation separation containing the modifier compositions, and improved methods of froth flotation using the modifier compositions have been developed, as well as kits including the modifier composition for industrial use. The modifier compositions obtain both improved yield and a higher grade of a targeted mineral product in froth flotation of one or more phosphate, lithium, and / or iron ores, while avoiding excess foam formation during the flotation.

Methods of improving the stability of froth flotation overflows and underflows include adding 1 ppm to 1000 ppm by weight of a cationic polymer to an overflow or an underflow including 1 wt% to 20 wt % of a particulate product in a medium, wherein the particulate product is a valuable mineral product or a gangue. In particular, the addition of cationic polymer to a tailings flow – that is, a gangue in a fluid medium - reduces or eliminates "sanding", a term of art used to describe the technical problem of deposition of gangue solids from tailings flows transported through pipes, tubes, and runways during transportation thereof e.g. to a thickener bed.

A process for beneficiating a sulphide ore comprising one or more sulphide minerals into at least one value mineral-rich froth concentrate is provided. The process includes subjecting an aqueous slurry or pulp of particles of the sulphide ore, in the presence of a depressant selected from the group consisting of cyanuric acid trisodium salt (C3H4N3NaO3), sodium cyanate (NaOCN), cyanuric acid (C3H3N3O3), and mixtures of two or more of these, to froth flotation by aerating the slurry or pulp thereby to produce at least one value mineral-rich froth concentrate and an aerated slurry or pulp that includes gangue. Said at least one value mineral-rich froth concentrate is then separated from the aerated slurry or pulp.

The present invention discloses a treatment method for improving the recovery and separation of carbonaceous materials in stone coal vanadium ore, comprising the following steps: 1) heating and activating the stone coal vanadium ore, cold quenching and pulping fine grinding to obtain a pulp; 2) flotation of the pulp to enrich and recover the carbonaceous materials. The present invention pre-treats the stone coal vanadium ore by using an additive heating activation method combined with cold quenching and pulping fine grinding, effectively improving the degree of dissociation of carbonaceous materials from gangue and improving the flotation effect, recovering the carbonaceous resources in stone coal, and making comprehensive use of stone coal resources; then enriching and recovering the carbonaceous materials in the stone coal vanadium ore by froth flotation, reducing the impact of carbonaceous materials on leaching and vanadium extraction, avoiding the pollution caused by roasting and decarbonization, and having great environmental and economic advantages; at the same time, the carbonaceous concentrate is separated from the stone coal vanadium ore by froth flotation technology, which can be used as fuel or combustion ingredients for power generation and heat supply, thereby achieving clean, environmentally friendly, and energy-saving emission reduction of stone coal vanadium extraction.

The present invention relates to a process for extracting Ni and Cu from an ore comprising Ni and Cu and separating Ni from Cu, the process comprising the steps of: a) subjecting the ore to a first froth flotation to provide a first concentrate comprising Ni and Cu and a first underflow, b) subjecting the first concentrate to a second froth flotation to provide a second concentrate and a second underflow, and c) recovering Cu in the second concentrate and Ni in the second underflow, wherein the second froth flotation is conducted in the presence of H2O2.

Methods of improving the stability of froth flotation overflows and underflows include adding 1 ppm to 1000 ppm by weight of a cationic polymer to an overflow or an underflow including 1 wt % to 20 wt % of a particulate product in a medium, wherein the particulate product is a valuable mineral product or a gangue. In particular, the addition of cationic polymer to a tailings flow—that is, a gangue in a fluid medium-reduces or eliminates “sanding”, a term of art used to describe the technical problem of deposition of gangue solids from tailings flows transported through pipes, tubes, and runways during transportation thereof e.g. to a thickener bed.

The subject invention provides safe, environmentally-friendly, compositions and methods for extracting minerals and / or metals from rock, ore, tailings, and / or coal combustion wastes. More specifically, the subject invention provides for enhanced froth flotation, including direct flotation or reverse flotation, of rock, ore, tailings, and / or coal fly ash using a composition comprising one or more biosurfactants.

Improved partitioning compositions for froth flotation of mineral ores, and improved methods of froth flotation using the partitioning compositions have been developed. The partitioning compositions are suitably added to a mineral ore slurry in a single addition to provide a sparge composition that is ready for sparging. The use of the partitioning compositions obviates the need to adjust the pH of the ore slurry before or after the addition, and further avoids the use of compounds having a flashpoint of 60 °C or less. Meanwhile, the partitioning compositions obtain improved grade and recovery of phosphate product (P2O5) in froth flotation of phosphate ores, when compared to conventional chemistry and methods used for froth flotation of a phosphate ores.

The application provides a method and system for predicting the amount of reagent based on multi-modal flotation froth digital characterization, relating to the technical field of froth flotation. The method comprises: collecting multi-modal data of the froth state in the metal ore flotation process, including RGB images, video sequences and three-dimensional point clouds; constructing three froth feature extraction networks to extract the RGB features, video dynamic features and three-dimensional point cloud features of the multi-modal data respectively; fusing the extracted RGB features, video dynamic features and three-dimensional point cloud features based on a cross-modal attention mechanism to generate multi-modal features; constructing an expert knowledge base, which includes structured rules and historical cases; constructing a reagent dosage decision model based on the expert knowledge base and a large language model, converting the multi-modal features into standardized vector representations, retrieving the expert knowledge base using similarity matching, and generating a reagent dosage adjustment strategy. The application can realize accurate prediction from froth multi-modal features to reagent dosage adjustment.

The invention provides a flotation separation method for molybdenite and bismuthite. The flotation separation method comprises the following steps that an ore sample containing the molybdenite and the bismuthite is sorted, crushed and ground to serve as a flotation sample; minerals and water are mixed to form ore pulp, and the pH value of the ore pulp is adjusted to a certain value; adding a certain amount of oxidizing agent into the ore pulp and stirring; adding a certain amount of inhibitor into the ore pulp, and stirring; a certain amount of collecting agent is added into the ore pulp, and stirring treatment is conducted; adding a certain amount of foaming agent into the ore pulp, and stirring; and S5, carrying out foam flotation on the ore pulp obtained in the step S5, respectively filtering, drying and testing a foam product and a tank bottom product after flotation, and calculating the recovery rate. The efficient and environment-friendly collecting agent and selective inhibitor are provided, efficient separation of molybdenite and bismuthite can be achieved, the utilization efficiency of mineral resources is improved, the influence on the environment is further reduced, and technical support is provided for sustainable development of mines.

A process for separating iron-bearing impurities from silica sand is described. The process comprises the steps of subjecting a silica sand slurry to froth flotation in the presence of a collector, frother and depressant selected to concentrate the iron-bearing impurities of the silica sand in a flotation froth, thereby producing a silica sand depleted in iron-bearing impurities in a tail product. The collector comprises ≥60 to ≤70 w / w % tall oil acids, ≥10 to ≤30 w / w % poly-α-hydroxyl alkyl ethers and up to 3 w / w % tall oil rosin. The frother comprises a non-ionic surfactant, in particular one or more alkyl polypropoxy CnPm and / or polyethoxy CnEm frothers, wherein n=0-6 and m=1-3. The depressant comprises sodium silicate.

A hydrometallurgical apparatus and method for direct leaching of copper, gold, and silver sulfide and oxide minerals of intermediate particle size, called Templar Technology, is disclosed. It comprises a closed reactor equipped with an agitation and transport mechanism using an internal shaftless helical screw with a spiral of 35 to 50 mm structural thickness, arranged concentrically within a cylinder with an anti-corrosive and anti-slip lining inert to chloride-oxidizing media. The reactor is hermetically interconnected in its upper section to a system for the condensation, capture, and continuous recirculation of gaseous phases by means of pure oxygen injection to induce premature oxidation of the mineral, guiding the gases to a horizontal condenser with an inverted asymmetric return of condensed liquid gases into the reactor.The method comprises the activation, desliming, and mixing of the ore in a controlled, closed-circuit grinding system to a cut size of between 200 and 400 µm, with 300 µm being the target. A hydro-desilter and a deep-cone settler are coupled to self-regulate a feed pulp moisture content of between 22% and 25%, which is then fed into a reactor loading hopper. There, sodium chloride, sulfuric acid, and optionally additional oxidizing agents are dosed in a fractional and sequential manner. The method includes a subsequent stage of agglomeration and static chemical curing in heaps with a resting period of 15 to 60 days for sulfides and 1 to 15 days for oxides.After settling, the material is washed and repulped with acid raffinate to a solids density of 30% to 40% in agitators with controlled residence times of up to 120 minutes. The pulp is then sent to a classifier system coupled with hydrocyclones, where the coarse sand fraction of the underflow is discharged semi-dry, and the fine slime fraction of the overflow feeds a clarifier to obtain a solids-free, rich solution (PLS). The thick underflow is then directed to a filter press for the recovery of any remaining impregnated PLS. This system eliminates froth flotation circuits, reduces energy consumption in milling, and optimizes mass transfer by eliminating losses due to passivation.

The present invention relates to stable ionic xanthate compositions in aqueous solution for prolonged periods of time that are useful as collector reagents in the froth flotation process. The stable ionic xanthates of the present invention are dissolved in aqueous solution at their maximum water solubility (28-30%), being highly stable and safe ionic products, preventing the instability and flammability of the solid products which allows safe handling, both for operators in mining work and for the environment.

A froth flotation unit for treating mineral ore particles suspended in slurry includes a tank, a gas supply for introducing flotation gas into the slurry to form froth, and a first froth collection launder including a first froth overflow lip facing towards the centre of the tank. The froth flotation unit has a pulp area of at least 15 m2 measured at a mixing area. The froth flotation unit further includes a second froth collection launder with a first froth overflow lip facing the perimeter of the flotation tank, and a froth blocker arranged between the first froth overflow lip and the second froth overflow lip. A froth flotation line, its use, and a froth flotation method are also disclosed.

The invention discloses a method for enriching aluminum oxide by using silicon ore tailings and preparing a mullite refractory material. The method comprises the steps that firstly, silicon ore tailings are subjected to ball milling till the content of the-74-micron particle fraction is 60%-70%, then foam flotation treatment is conducted, and efficient separation of aluminum-containing minerals and gangue is achieved by adjusting the pH value of ore pulp, the concentration of the ore pulp, the using amount of a collecting agent, the air amount, the thickness of a foam layer and other technological parameters. When the content of aluminum oxide in the tailings is insufficient, fly ash, bauxite tailings, low-grade bauxite or waste refractory material powder can be added as supplementary raw materials. And finally, aluminum-rich concentrates with the aluminum oxide content of 63 + / -1%, 67 + / -1%, 73 + / -1% and 75 + / -1% are obtained, and homogenized materials of different grades are formed. And the obtained concentrate is subjected to vacuum pugging, molding, drying and sintering to prepare the mullite or corundum-mullite refractory product with excellent performance.

The invention relates to the technical field of mineral flotation, in particular to a copper sulfide molybdenum ore bulk flotation device and method. The copper sulfide molybdenum ore bulk flotation device is used for conducting froth flotation on ore pulp and comprises a main body, an impeller mechanism and a scraper mechanism, the impeller mechanism is arranged in the center of the main body and stirs liquid in the main body and generates micro-nano bubbles, and the copper sulfide molybdenum ore bulk flotation device further comprises a feeding and mixing mechanism, at least one set of mixing device is arranged between the impeller mechanism and the scraper mechanism and comprises a mixing shell, a slurry inlet disc, a mixing pipe and a collecting agent storage assembly. And the confluence mixing mechanism is arranged in the mixing shell and comprises a confluence plate and a multidirectional mixing assembly. According to the copper sulfide molybdenum ore bulk flotation device, the flotation effect can be guaranteed under the condition that the using amount of a collecting agent is reduced. Moreover, the proportion of the collecting agent is further adjusted, the adhesion selectivity of copper and molybdenum minerals is improved, and therefore the use amount of the needed composite collecting agent is reduced under the condition that the flotation effect is guaranteed.

The present invention relates to compositions that are stable over time in an aqueous medium and comprise thionocarbamate-derived compounds, and to the preparation method thereof. The invention also relates to aqueous collector compositions that are stable for extended periods of time and suitable for use in processes involving the froth flotation of sulfide minerals for the extraction of valuable metals, the compositions comprising compounds derived from thionocarbamate that are stable in an aqueous medium, compounds derived from mono- and dithiophosphates, stable ionic xanthate solutions and lignin.

This invention relates to a controlled-foam flotation method for fine-grained zinc oxide ore, belonging to the field of mineral processing technology. Addressing the problems of deteriorating separation indices due to slime recycling, large and poorly fluid foam, stable and highly viscous foam layers, and poor flotation performance in the flotation process of fine-grained zinc oxide ore, this invention improves the flotation process and recovery indices by innovating the flotation process and developing novel flotation reagents. Specifically, it employs a fine scavenging operation to process middlings separately, avoiding their return to roughing and cleaning operations, thus preventing repeated recycling of slime in these operations and directly producing zinc concentrate. Furthermore, it uses a foam control agent to regulate the flotation foam of fine-grained zinc oxide ore, thereby increasing its ore-carrying capacity and improving the stability, viscosity, and fluidity of the foam layer. This facilitates the smooth flotation process of fine-grained zinc oxide ore, achieving higher flotation indices and promoting the efficient recovery of complex and difficult-to-process zinc ore resources.

A froth flotation unit including a flotation tank, a froth collecting launder having a froth overflow lip and a near coarse launder having a second lip. The second lip is arranged closer to the bottom of the flotation tank than the froth overflow lip. A froth flotation method for treating coarse particles suspended in slurry in the froth flotation unit is also provided.

The utility model belongs to the technical field of gas purification, and particularly relates to a desulfurization regeneration tank liquid level adjusting and froth flotation device which comprises a communicating pipe, the top of the communicating pipe is fixedly connected with an outer cylinder, the top of the outer cylinder is connected with an upper cover, the top of the upper cover is provided with a balance air inlet, and a threaded rod penetrates through the top of the upper cover in a threaded mode. According to the utility model, the shifting block shifts the movable block to drive the bayonet lock to contract, then the indicating rod is inserted from the first connecting sleeve, penetrates through the upper cover and then is inserted into the second connecting sleeve, at the moment, the shifting block is loosened, and the bayonet lock pops up under the action of the spring and is inserted into the bayonet lock, so that the indicating rod is mounted and fixed; in the process that the electric screw lifter drives the threaded rod to rotate to adjust the height of the inner cylinder, the annular sleeve can rotate along the interior of the annular groove, so that the top of the connecting rod can drive the indicating rod to ascend and descend together, and then the height of the inner cylinder can be accurately checked according to the position of the graduated scale; and the practicability of the device is improved.

Methods of improving the stability of froth flotation overflows and underflows include adding 1 ppm to 1000 ppm by weight of a cationic polymer to an overflow or an underflow including 1 wt% to 20 wt % of a particulate product in a medium, wherein the particulate product is a valuable mineral product or a gangue. In particular, the addition of cationic polymer to a tailings flow – that is, a gangue in a fluid medium - reduces or eliminates "sanding", a term of art used to describe the technical problem of deposition of gangue solids from tailings flows transported through pipes, tubes, and runways during transportation thereof e.g. to a thickener bed.

The invention relates to the field of nonmetallic mineral processing, in particular to a froth flotation method for barium sulfate minerals. The invention discloses a formula for an agent for barite flotation. Sodium oleate (lauryl sodium sulfate) is used as a collecting agent, water glass is used as an inhibitor, terpilenol is used as a foaming agent, the content of barium sulfate in barite mineral powder in foam flotation can be increased by adjusting the content of the collecting agent and the content of the inhibitor, and impurities are enriched in tailings. The collecting agent for barite flotation is prepared from the following raw materials in percentage by weight: 0.05 to 0.1 percent of sodium oleate (lauryl sodium sulfate) and 0.1 to 0.2 percent of water glass; the flotation agent is high in selectivity and strong in ore loading capacity, and can achieve an excellent flotation effect on barite ore in Longnan Wenxian County, Gansu Province, and concentrate with higher purity and higher recovery rate are obtained. The density of the purified barite powder is remarkably improved, and the obtained barite product can meet the density requirements of grade II products and even grade I products as a weighting agent of drilling mud. The method is simple in process, excellent in collecting agent effect, low in cost, environmentally friendly and capable of being deployed in factories on a large scale.

The present invention provides methods and composition for improving a froth flotation process for the removal of mineral values from aqueous solutions. The method uses mercaptide microemulsions to improve the separation effectiveness of a collector. The present invention provides a method of enhancing the performance of a collector in a froth flotation separation of mineral ore in a medium, the method comprising the steps of: forming a slurry by blending a collector microemulsion, the mineral ore in a medium, and optionally other additives, —and removing concentrate from the ore by sparging the slurry; wherein the collector microemulsion comprises a continuous phase which is an aqueous carrier fluid and a dispersed phase comprises a mercaptide.

The present invention relates to compositions of long-term stable ionic xanthates in aqueous solutions that can be used as collector reagents in froth flotation processes. The stable ionic xanthate of the present invention is dissolved in an aqueous solution with its maximum water solubility (28-30%) as an ionic product with high stability and safety, avoiding the instability and flammability of solid products, which enables safe operation by an operator in mining work and is also safe to the environment.

The application discloses a method for recovering phosphate in a digestion sludge system and separating products. The method uses the difference between the hydrophilicity and hydrophobicity of the vivianite particles and the digestion sludge in the digestion sludge system, uses a collector to improve the hydrophobicity of the vivianite, uses an inhibitor to improve the hydrophilicity of other impurity particles such as silicon dioxide, separates the vivianite particles and the impurities such as silicon dioxide in the digestion sludge through a froth flotation method, and can realize efficient separation and recovery of phosphorus resources.

A terpolymer composition, and method of preparing the same, said terpolymer composition comprising 5 to 90 mol% of recurring units having an uncharged functional group, 5 to 40 mol% of recurring units having a sulfur-containing functional group, and 5 to 90 mol% of recurring units having a charged functional group, based on total mols of the terpolymer composition, wherein the terpolymer composition comprises a weight averaged molecular weight (Mw) in a range of 1000 Da to 15000 Da. The present invention also relates to a method of selectively recovering sulfide minerals comprising conditioning a process ore slurry with the terpolymer composition, and conducting a froth flotation process to separate the process ore slurry into a non-value mineral stream and a value mineral stream.