子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 281 | Ore flotation device and process | US380984 | 1989-07-17 | US4960509A | 1990-10-02 | Harry L. McNeill |
| A mineral processing device for floating relatively large particles and middling particles is disclosed. The device provides a uniform upward flow of pulp in a flotation zone. Gas bubbles are introduced into the pulp with minimal agitation. Agitation in the flotation zone is also controlled by a plate with a multitude of holes of varying size. The upward flow velocity in the flotation zone is controlled by means of a variable speed impeller and an adjustable partition. Further, a flotation process utilizing uniform upward flow is provided. | ||||||
| 282 | Method for making low alpha count lead | US406063 | 1989-09-12 | USRE33313E | 1990-08-28 | John A. Dunlop; Robert W. Smyth; Gerald W. Toop |
| Lead with a low alpha particle emission is produced by selecting an orebody wherein lead mineral is present in a coarsely disseminated form and substantially free of impurities. The ore is selected from a host rock that is relatively low in alpha emitters, such as a carbonate rock. The ore is mined and is milled such that the lead mineral can be separated from the host rock and any other minerals. The ground ore may be screened into one or more fractions having a narrow range of particle sizes. Each fraction is formed into a fluid suspension, and each suspension is subjected to gravity separation to remove the host rock and any other minerals which substantially contain the alpha particle-emitting substances, and to recover the lead mineral as a concentrate with a low alpha count. The lead concentrate is subjected to a suitable smelting operation, without the introduction of alpha emitters for the recovery of a low alpha lead. When the lead mineral is galena, the smelting is preferably carried out with sodium carbonate and an oxygen-bearing gas in the presence of sodium chloride as a fluxing agent to form a low melting point slag. The low alpha lead has an alpha count of about 0.02 alpha particles per cm.sup.2 per hour or less, and the count does not substantially increase with time. | ||||||
| 283 | Recovery of elemental sulphur from products containing contaminated elemental sulphur by froth flotation | US220521 | 1989-01-25 | US4952307A | 1990-08-28 | Ion I. Adamache |
| A new "cold" process for the recovery of elemental sulphur from contaminated elemental sulphur products is described. Elemental sulphur is recovered by froth flotation from: contaminated base pads of elemental sulphur blocks, stockpiles of contaminated elemental sulphur; contaminated elemental sulphur rejects from industrial handling and hauling; complex sulphur agglomerate, reject by-product from hot melting processes which is presently unprocessable and discarded (or as is otherwise referred to as "sulphur crete melt residue"); contaminated products resulting from the exploitation processes using wells for the application of heat to reservoirs in order to recover elemental sulphur; and also from other sources of contaminated elemental sulphur in the oil and gas and other industries. This process comprises the steps of coarse screening, crushing, wet grinding, sizing, classifying. Then, the wet ground slurry at ambient temperature is treated by froth flotation, removing the elemental sulphur in the froth, and transporting the undesirable contaminants to storage ponds or subsequent land reclamation. The initial elemental sulphur froth from the first stage of flotation is cleaned one or more times by reflotations. The cleaned elemental sulphur-bearing froth is then filtered to remove excess water and to produce a filter cake. | ||||||
| 284 | Method for making low alpha count lead | US362495 | 1989-06-07 | US4915802A | 1990-04-10 | John A. Dunlop; Edward F. G. Milner; Robert W. Smyth; Gerald W. Toop |
| Lead with a low alpha particle emission is produced by selecting an orebody wherein lead mineral is present in a coarsely disseminated form and substantially free of impurities. The ore is selected from a host rock that is relatively low in alpha emitters, such as a carbonate rock. The ore is mined and is milled such that the lead mineral can be separated from the host rock and any other minerals. The ground ore may be screened into one or more fractions having a narrow range of particle sizes. Each fraction is formed into a fluid suspension, and each suspension is subjected to gravity separation to remove the host rock and any other minerals which substantially contain the alpha particle-emitting substances, and to recover the lead mineral as a concentrate with a low alpha count. The lead concentrate is subjected to a suitable reduction operation that may include a conversion of the concentrate into a reducible form, without the introduction of alpha emitters, for the recovery of a low alpha lead. When the lead mineral is galena, suitable reductions include the smelting with sodiuim carbonate with or without an oxygen-bearing gas and electrolytic reduction in a molten bath of lead chloride. The low alpha lead recovered from these operations has an alpha count of about 0.02 alpha particle per cm.sup.2 per hour or less, and the count does not substantially increase with time. The recovered low alpha lead may be further purified by electro-refining. | ||||||
| 285 | Method for making low alpha count lead | US237747 | 1988-08-29 | US4887492A | 1989-12-19 | John A. Dunlop; Edward F. G. Milner; Robert W. Smyth; Gerald W. Toop |
| Lead with a low alpha particle emission is produced by selecting an orebody wherein lead mineral is present in a coarsely disseminated form and substantially free of impurities. The ore is selected from a host rock that is relatively low in alpha emitters, such as a carbonate rock. The ore is mined and is milled such that the lead mineral can be separated from the host rock and any other minerals. The ground ore may be screened into one or more fractions having a narrow range of particle sizes. Each fraction is formed into a fluid suspension, and each suspension is subjected to gravity separation to remove the host rock and any other minerals which substantially contain the alpha particle-emitting substances, and to recover the lead mineral as a concentrate with a low alpha count. The lead concentrate is subjected to a suitable reduction operation that may include a conversion of the concentrate into a reducible form, without the introduction of alpha emitters, for the recovery of a low alpha lead. When the lead mineral is galena, suitable reductions include the smelting with sodium carbonate with or without an oxygen-bearing gas and electrolytic reduction in a molten bath of lead chloride. The low alpha lead recovered from these operations has an alpha count of about 0.02 alpha particle per cm.sup.2 per hour or less, and the count does not substantially increase with time. The recovered low alpha lead may be further purified by electro-refining. | ||||||
| 286 | Process for beneficiating ores containing fine particles | US208170 | 1988-06-16 | US4883586A | 1989-11-28 | Laurence W. Bierman; Samuel M. Polinsky; Roger B. Humberger |
| 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 gangue is adjusted to a solids content of less than about 15 percent, as necessary, and then conditioned by the addition of appropriate promoter reagents, a flotation collector, and a froth modifier. The gangue, containing a disproportionate share of impurities, is floated in a column flotation cell wherein the fine particulates are not mechanically agitated, and removed. The remaining fine particulate underflow, containing a disproportionate share of the minearl values, is then processed directly, or combined with the slurry containing the coarse particulate to yield a flow having reduced impurity content and increased recovery of the mineral values. | ||||||
| 287 | Apparatus and process to separate and remove extraneous matter from a liquid stream | US225871 | 1988-07-29 | US4832854A | 1989-05-23 | Kathy L. Keeter; Thomas L. Keeter |
| Waste water contaminents are treated and/or removed in a process and a separator that incorporates a hydrocyclone, a constrictive collection passageway for lighter materials to be removed from the water by a skimmer and skimmer ramp that effectively entrap and remove floatable contaminents while clarified water is removed from the separator at a point below the skimmer and above the hydrocyclone. | ||||||
| 288 | Apparatus and process to separate and remove extraneous matter from a liquid stream | US133129 | 1987-12-14 | US4780201A | 1988-10-25 | Kathy L. Keeter; Thomas L. Keeter |
| Waste water contaminents are treated and/or removed in a process and a separator that incorporates a hydrocyclone, a constrictive collection passageway for lighter materials to be removed from the water by a skimmer and skimmer ramp that effectively entrap and remove floatable contaminents while clarified water is removed from the separator at a point below the skimmer and above the hydrocyclone. | ||||||
| 289 | Drilling mud cleaning machine | US876117 | 1986-06-19 | US4670139A | 1987-06-02 | Walter L. Spruiell; Jerry L. Spruiell |
| A machine for cleaning drilling muds by removing entrained solids and impurities and returning cleansed and for recycling. The machine comprises a centrifuge desander operatively connected to a plurality of cooperating conical desilters to remove gases and separate materials of varying densities. Initially muds containing solid materials are pumped at a controlled pressure from the cleaning bed into an initial cyclone chamber, where, under increasing centrifugal force, the processed mud is separated into relatively heavier and lighter components, which are transmitted via separate pathways to twin chambers in the lower level compartment of a particle separating drum. The first chamber of the drum receives heavier materials and transmits them to a large desander cone where the heaviest impurities are removed; the second drum chamber receives the lighter components which are further separated and delivered to a network of desilter cones which output properly cleansed mud. The purified output of the large densander cone is transmitted directly back into the cleaning bed reservoir, and "dirty" mud is thus recycled continuously until "clean enough" to escape the loop by exiting through the desilter cones. Freed air and gasses are discharged at controlled rates to be burned or dispersed into the environment through a third stage, which is in fluid flow communication with the initial stage and the desilter stage. Through the gas removal construction disclosed, the efficiency of the various stages of the cleaning processes is increased, and drilling mud losses are minimized. | ||||||
| 290 | Method of beneficiation of complex sulfide ores | US883280 | 1986-07-11 | US4663279A | 1987-05-05 | Hiroichi Miyashita; Hajime Nakazawa; Masayuki Hisatsune |
| 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 differential flotation to obtain a bulk copper-zinc concentrate which is separate from pyrite and gangue, and passing the bulk copper-zinc concentrate through a high-gradient magnetic separator having an open-bore magnetic field filled with a matrix element, so as to recover separately a magnetic copper concentrate and a non-magnetic zinc concentrate. By combining the differential flotation with high-gradient magnetic separation, the present invention enables individual separation of copper and zinc concentrates without using many reagents in high volumes and by a simple process control. | ||||||
| 291 | Process for the recovery of precious metals from a roaster calcine leach residue | US676354 | 1984-11-29 | US4579589A | 1986-04-01 | William A. Yuill; Barbara A. Krebs; Gretchen L. Graef |
| A process for separating precious metals from a roaster calcine leach residue from a process wherein copper or zinc sulfides are roasted to produce a copper or zinc calcine; the calcine is leached with an aqueous sulfuric acid leaching solution to produce a copper or zinc-containing leaching solution and a roaster calcine leach residue and the copper or zinc-containing leaching solution is separated from the roaster calcine leach residue wherein the process comprises:(a) intimately contacting the roaster calcine leach residue with an aqueous sulfuric acid leach solution containing from about 5 to about 200 grams per liter of sulfuric acid to produce a slurry of leach solution and roaster calcine leach residue and to dissolve precious metal from roaster calcine leach residue;(b) adding copper or zinc sulfide solids to the mixture of leach solution and said roaster calcine each residue;(c) agitating the copper or zinc sulfide solids in intimate contact with the mixture of leach solution and roaster calcine leach residue under oxidizing conditions for a time from about 5 to about 20 minutes to collect precious metal on the copper or zinc sulfide solids;(d) separating the leach solution from the roaster calcine leach residue and the copper or zinc sulfide solids; and,(e) separating the copper or zinc sulfide solids from the roaster calcine leach residue by a froth flotation process. | ||||||
| 292 | Mineral separating process and apparatus | US483634 | 1983-04-11 | US4525270A | 1985-06-25 | John C. McCann |
| Heavy minerals such as gold, silver, platinum, etc., along with gemstones such as diamonds, rubys, sapphires, etc., occuring in nature in the free state or having been mechanically released by crushing, screening and/or sorting into a free state, can be separated from the common material, into which they are mixed, by applying water to the mixture of materials and allow their different specific gravities to separate them into the bottom of a grooved trough. In the novel mineral concentrator described, to minimize the loss of water, a recirculating pump re-uses the same water from a reservoir repeatedly. The free minerals and gemstones settle out of the main water flow and are trapped into grooves and other pockets and crevices. Some of the pump's water flow is allowed into a feed hopper to wash down the hopper's walls, and in conjunction with shaped apertures in the hopper bottom, automatically regulate the flow of material entering the main trough or sluice. All of the lighter material which leaves the sluice section, passes into a filter bag which retains the particulate matter, thus separating the waste material from the water which is left in a clean condition. | ||||||
| 293 | Process for recovering pyrochlore mineral containing niobium and tantalum | US511253 | 1983-07-06 | US4493817A | 1985-01-15 | Rudy Biss |
| Niobium and tantalum containing pyrochlore is recovered from high silicate gangue content ore with good selectivity and yield employing collectors of formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are independently 8 to 16 carbon straight or branched chain alkyl groups, at pH 1.5 to 6.5. | ||||||
| 294 | Method of preparing highly purified kiln dried solar salt | US451005 | 1982-12-20 | US4488958A | 1984-12-18 | Joy L. Williams; David L. Rose; Louis M. Haas |
| Partially purified salt containing less than about 00.4 weight percent insolubles is further purified to reduce the insolubles until the milk pad rating is 3 or better for certain industrial uses and 1 for human consumption. The entry salt is washed in clarified brine to dislodge insoluble impurities adhered to the salt surfaces. The washed salt is then scrubbed with fresh water sprays to displace the wash brine from salt surfaces. The washed salt is drained and then dried in a kiln where flowing air blows away some impurities. The dried salt is passed through a magnetic separator, doubly sifted to remove both large and small impurities, and, where food grade salt is required, passed through a color sorter that removes relatively dark impurities. | ||||||
| 295 | Hydrometallurgical process for the recovery of valuable metals from sulfidic, silicate-containing raw materials | US396461 | 1982-07-08 | US4483827A | 1984-11-20 | Seppo O. Heimala |
| The invention relates to a process for the recovery of valuable metals from sulfidic, silicate-containing raw materials by slurrying the raw material in water, by subjecting the slurry to a selective leach under atmospheric conditions and in an acidic milieu, and by separating the valuable-metal containing solution from the solid leach residue.When the leach is carried out by introducing an oxygen-bearing gas into the slurry which contains finely-divided sulfide and carbon, the acidity of the slurry drops in a controlled manner so that a high efficiency of oxygen, and a high selectivity of the leach as regards valuable metals, are obtained. Owing to the presence of carbon the oxygen is reduced very easily and so oxygen efficiency is high and the rate of dissolving of the valuable metals increases in the slurry mixture. | ||||||
| 296 | Method and apparatus for cleaning drilling fluids | US339533 | 1982-01-15 | US4459207A | 1984-07-10 | Grant A. Young |
| Method and apparatus for making a sharp separation of solids into components which are finer than the screen mesh and coarser then the screen mesh. The solids ladened fluid is introduced onto a screen to separate coarse solids from fine solids. A tray containing a body of aqueous liquid is vibrated causing the aqueous liquid to repeatedly contact the solids while on the screen to provide the needed mobility for fine particles to pass through the screen with the liquid. The aqueous liquid returns to the tray and the vibration of the tray aids in removal of the fine solids which have passed through the screen from the tray. Aqueous liquid is continuously added to the tray or sprayed above the screen to keep accumulated solids from increasing the viscosity of the aqueous liquid in the tray. | ||||||
| 297 | Flotation process | US35634 | 1979-05-03 | US4441993A | 1984-04-10 | Frank P. Howald |
| A process for recovering metallic values by putting the values into solution and separating undesired mineral matter from the solution using countercurrent flotation is provided. The process involves leaching metallic values from host rock, conditioning the resultant ore pulp with the required reagents to achieve selective flotation of mineral matter in the metallic values solution, introducing the conditioned ore pulp into flotation cells, along with counterflow of solution from an immediately subsequent flotation step, wherein simultaneous washing and flotation is achieved, and the mineral matter is removed leaving a solution of the metallic values. The resultant mineral matter froth product is subjected to subsequent stages of flotation and simultaneous washing with counterflow of solution removed from each subsequent stage of flotation, water and/or barren solution being used for washing in the final flotation stage. The addition of water and/or barren solution to the final stage is controlled to maintain the desired concentrations of the advancing solutions. | ||||||
| 298 | Process of removing iron impurities from ores | US333256 | 1981-12-21 | US4405588A | 1983-09-20 | Alejandro J. Caballero; Ricardo I. Holcombe |
| A process of removing iron impurities from ores, particularly useful for removing stains of iron impurities adhered to silica sand particles, comprises grinding the ore, washing and desliming the ground ore to remove the major part of the clay-type binder, attrition-scrubbing the deslimed particles to release further amounts of binder therefrom, washing and desliming to remove said binder, drying and heating the ore particles, treating the hot particles with a chemical agent suitable to conver the iron impurities into water soluble iron compounds, attrition-scrubbing the hot suspension of chemically treated particles to release the stains of iron impurities, and washing with cold water and desliming to recover the purified ore particles. | ||||||
| 299 | Flotation recovery of lead, silver and gold as sulfides from electrolytic zinc process residues | US306707 | 1981-09-29 | US4385038A | 1983-05-24 | Jussi K. Rastas; Kaarlo M. J. Saari; Vaino V. H. Hintikka; Jaakko O. Leppinen; Aimo E. Jarvinen |
| A process is disclosed for the recovery of lead, silver and gold from the iron-bearing residue of an electrolytic zinc process by froth-flotating a slurry of the iron-bearing residue in the presence of a sulfidic collector agent in order to froth-flotate the sulfides and to separate them from the iron-bearing residue. The iron-bearing residue is sulfidized selectively in order to convert the lead, silver and possibly gold substantially quantitatively to sulfides before the iron-bearing residue is froth-flotated. | ||||||
| 300 | Hydrometallurgical process for the recovery of lead, silver and gold, as well as zinc, from impure jarosite residues of an electrolytic zinc process | US306673 | 1981-09-29 | US4366127A | 1982-12-28 | Jussi K. Rastas; Jens R. Nyberg |
| The impure jarosite residue of an electrolytic zinc process is leached in a sulfuric-acid-bearing solution in order to produce a leach residue which contains lead, silver and gold and a ferrisulfate-bearing solution and to separate them from each other, whereafter the leach residue is sulfidized and froth-flotated in order to recover a combined concentrate which contains lead, silver and gold, and the ferrisulfate-bearing solution is fed to a ferritic treatment stage, in which ferrisulfate and ferrites react in the presence of ions of alkali and ammonium at 80.degree.-105.degree. C. and form pure jarosite and zinc sulfate. | ||||||
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