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 |
|---|---|---|---|---|---|---|
| 301 | Direct flotation of pyrochlore | US261132 | 1981-05-05 | US4342648A | 1982-08-03 | Rudy Biss; Raymond Nadeau |
| Direct flotation of pyrochlore from its ore can be carried out at acidic pH using 1-amidoethyl-2-substituted imidazolines of the formula ##STR1## wherein R and R' are independently alkyl or alkenyl of 8 to 22 carbons, or their salts. In the presence of large amounts of carbonate in the ore, the pulp is acidified with hydrofluoric acid, fluosilicic acid, or their acid reacting compounds. Using this process, pyrochlore concentrates can be obtained by direct flotation from ore containing 0.1% or more of sulphide compounds calculated as FeS.sub.2. | ||||||
| 302 | Gold concentrator | US218977 | 1980-12-22 | US4319985A | 1982-03-16 | William M. Hibbard |
| A gold concentrator comprises a housing at the end of a sluice into which a quantity of sand, rock and gold particles is deposited. A screen on a portion of the sluice serves to segregate larger particles of rock and gold from the finer sand particles. A hose is attached to the rear wall of the housing and water under pressure mixes with the finer sand. The mixture of sand and water strikes a wall and a depending flange within the housing causing the mixture to turn over therein thus creating a suspension of particles within the liquid. The suspension falls onto the sluice and flows downwardly therealong and over the screen at the bottom thereof. A flange at the end of the sluice turns the suspension in the opposite direction where it flows down a forwardly extending second sluice. The forwardly extending second sluice has a rubber mat thereon having a series of transversely extending grooves which function to trap the gold and black sand particles therein. The screen serves to retard the flow of suspension mixture as it advances down the sluice and to remove large particles of rock, gold and silver in the suspension. | ||||||
| 303 | Current mirror circuit | US115522 | 1980-01-25 | US4297646A | 1981-10-27 | James J. LoCascio; Robert B. Jarrett |
| A three terminal current source is disclosed including a current turn around circuit comprising first and second transistors. The emitters of the pair of transistors are coupled to a common terminal with the collector of the first one of the pair of the transistors being coupled to an input terminal at which is supplied a reference current with the collector of the other one of the pair of transistors being coupled in cascode through the emitter collector path of an output transistor to the output terminal of the current source circuit. The base electrodes of the pair of transistors are directly connected to each other with the control electrode of the output transistor being connected to the collector of the first one of the pair of transistors of the current turn around circuit. A single lateral split collector transistor is utilized to improve the current match between the input and output of the current source wherein the emitter of this transistor is connected to the base electrodes of the pair of transistors of the current source with one collector and the base of the split collector transistor being connected to the collector of the second one of the pair of transistors. The other one of the collectors of the split collector transistor is connected directly to the output terminal of the current source. The aforedescribed structure provides a current source having improved matching characteristics over a temperature range which varies from -40.degree. C. to +125.degree. C. | ||||||
| 304 | Process for the recovery of copper and zinc values from sulphidic ore | US129926 | 1980-03-13 | US4279867A | 1981-07-21 | Donald R. Weir |
| A process for the recovery of copper and zinc values from copper and zinc containing sulphidic ore includes subjecting ground ore to a flotation operation. An initial copper concentrate is floated in a first flotation step, and the initial copper concentrate is fed to a second flotation step to float a relatively zinc free copper concentrate. Remaining ore from the first flotation step is fed to a third flotation step to float an initial zinc concentrate, and remaining ore from the third flotation step is fed to a fourth flotation step to float a copper and zinc containing material. An intermediate concentrate containing from about 5 to about 25% copper and from about 2 to about 25% zinc, with a total of at least about 12% copper and zinc, is produced by selecting at least the remaining ore from the second flotation step, and a zinc concentrate containing at least about 20% zinc is produced by at least selecting a portion of the initial zinc concentrate. | ||||||
| 305 | Bioadsorption alteration of iron sulfide surfaces | US87698 | 1979-10-23 | US4269699A | 1981-05-26 | Ronald G. L. McCready; Richard D. Coleman; Charles E. Capes; Alan G. Kempton; Nayera A. M. Moneib |
| The sulfide surfaces of finely-divided impure iron sulfide-containing minerals such as pyritic ores or coals are rendered hydrophilic by the adsorption of conditioned, inorganic sulfide-oxidizing bacteria. This adsorption of conditioned bacteria occurs in a short time to render the surfaces hydrophilic and allows these altered sulfide particles to be separated from hydrophobic solids by flotation, oil-agglomeration or the like. This bioadsorption process has particular applicability to pyritic coal beneficiation. | ||||||
| 306 | Methods and apparatus for transporting and processing solids | US143160 | 1980-04-23 | US4265737A | 1981-05-05 | Clay D. Smith; Douglas V. Keller, Jr. |
| The transporting of solids using selected fluorochlorocarbons as carriers. Techniques of recovering the carrier are also disclosed as are novel solids handling and processing systems in which the compositions employed as carriers are also used to effect a heavy liquid resolution of solids. | ||||||
| 307 | Recovery of minerals from ultra-basic rocks | US966886 | 1978-12-06 | US4256267A | 1981-03-17 | Phillip F. Burton; Risto T. Hukki |
| A process for the metallurgical treatment of pyroxenite-type ore, which comprises comminuting the ore to a particle size range of between about 40 and 600 micron, or alternatively between about 40 to 1000 micron, and thereafter subjecting the comminuted ore to dry HIMS to recover a non-attracted apatite concentrate from weakly attracted silicate minerals contained in the pyroxenite ore. Another aspect of the invention relates to the recovery of phlogopite and/or vermiculite from more weakly attracted diopside and non-attracted apatite by dry HIMS. A further aspect of the invention relates to particle size fractionation by pneumatic classification followed by dry HIMS, electrostatic separation and dry HIMS, and electrostatic separation alone, applied respectively to fine, medium, and coarse particle size fractions respectively to recover apatite from silicate minerals contained in pyroxenite ore. | ||||||
| 308 | Recovering of phosphates from phosphate ore | US926558 | 1978-07-19 | US4220523A | 1980-09-02 | J. D. Raulerson, Jr. |
| A process for recovering phosphate values from phosphate ore containing phosphates and silica in which scrubbed and screened ore is subjected to a flotation process which floats finer silica particles but not heavier silica particles, and which does not tend to float phosphates, and removing the floated material thereby forming a concentrate while discarding silica fines. The concentrate is next screened to remove components of the ore which are of sizes greater than the sizes of silica particles which will be removed by said flotation, and removing from the process finer particles which are passed by the screen and predominately contain phosphates because the finer silica particles had previously been floated off, and then comminuting the material retained on said screen and reintroducing it to the process. | ||||||
| 309 | Treatment of iron concentrate slurry to improve filtration | US763264 | 1977-01-27 | US4107028A | 1978-08-15 | Robert C. Emmett, Jr.; Stanley D. Heden; Roger P. Summerhays |
| An improved process for filter dewatering of an iron ore concentrate slurry produced from iron ore by selective flocculation followed by flotation wherein acid and then a surface tension reducing agent of the sulfosuccinate class is added to the concentrate slurry before the slurry is filtered. | ||||||
| 310 | Process for separating solids from high-boiling hydrocarbons in a plurality of separation stages | US652589 | 1976-01-26 | US4040958A | 1977-08-09 | Roland Rammler |
| Solids are separated from solids-containing, high-boiling hydrocarbons by mixing a lower-boiling liquid diluent with the solids-containing, high-boiling hydrocarbons, clarifying the mixture to separate same into a solid-enriched phase and a low-solids liquid phase, separating the high-boiling hydrocarbons from the low-solids phase by distillation, and recovering and reusing the diluent. The high-boiling hydrocarbons can be heavy oil or heavy tar from the thermal treatment of hard coal, brown coal, tar sands, oil shale or the like. | ||||||
| 311 | Method for beneficiation of magnesite ore | US531446 | 1974-12-10 | US3936372A | 1976-02-03 | Anthony Z. Frangiskos |
| A method for beneficiation of magnesite ore wherein the ore is subjected to calcination to decrease the bulk density of the magnesite relative to the gangue. Accordingly, after such calcination, conventional gravimetric separations can be conducted with greatly increased efficiency. When the calcination is conducted in a reducing atmosphere, initially non-magnetic gangue material is converted to a magnetic form and conventional magnetic separation procedures are conducted with enhanced efficiency. | ||||||
| 312 | Process for the treatment of mineral slimes | US501620 | 1974-08-29 | US3932275A | 1976-01-13 | Arthur Raymond Mewes; Robert W. Styron; Mark Harris Smith |
| A method of dewatering mineral slimes by adding fly ash and then a polyelectrolyte and blending slowly and thoroughly. The clear water supernatant may be drawn off from the sedimented coagulated solids. The coagulated solids may be further dewatered or treated in ecologically beneficial ways. | ||||||
| 313 | Method and apparatus for classifying viscous slurries | US51055674 | 1974-09-30 | US3928182A | 1975-12-23 | EDER THEODOR |
| A method and apparatus for classifying viscous slurries in order to sharply separate fine particles from coarse particles suspended therein. At a first classification stage fine particles are centrifugally separated from coarse particles by utilizing a liquid cyclone installation. The coarse particles derived from the first stage are delivered to a second stage where a gravitational wet classification is provided for separating coarse particles at the second stage by gravitational settling thereof with respect to the fine particles which overflow at the second stage. The slurry with fine particles therein separated at the second stage is delivered to a third stage where a further wet classification takes place to separate the fine particles derived from the second stage into coarse and fine particles at the third stage. The fine particles which are separated at the third stage are returned to the first stage while the coarse particles derived from the third stage are combined with at least part of the fine particles derived from the first stage to form the output of the system.
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| 314 | Benefication of siderite contaminated sand | US36894173 | 1973-06-11 | US3914385A | 1975-10-21 | SLADE WOODROW W |
| Disclosed is a method for removing iron and other impurities from sand containing kaolin clay, siderite (FeCO3) and other mineral impurities, by subjecting the sand to the sequential processing steps of washing, anionic mineral froth floating, cationic sand froth floating, and acid leaching of the froth floated sand with sulfuric acid to yield a flint glass quality sand containing less than about 0.025% by weight of iron as Fe2O3.
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| 315 | Recovering metal values | US3657997D | 1969-02-18 | US3657997A | 1972-04-25 | VELLELLA VINCENT A |
| Materials containing metal values and contaminants are subjected to a grinding operation to selectively pulverize the contaminants while minimizing grinding action on the metal values. Selective grinding is effected by controlling power input to the grinding operation. The material is ground as a pulp, and pulp density is controlled for continuous operation of the grinding mill. Pulverized contaminants are hydraulically separated from metal values in turbulators operated in parallel-flow arrangement to permit continuous discharge from the grinding mill. Underflow from turbulators passes into a rake classifier. Underflow from the classifier is dried in a hot gas blast, where separation of piggyback slimes is effected. Dried concentrate is briquetted. In a preferred embodiment, residues from grinding stainless steels are subjected to selective grinding to break away grinding wheel components bonded to the metal particles and to pulverize grinding wheel components and other contaminants while minimizing work hardening of the metal particles to avoid impairment of the ability of the metal particles to be briquetted.
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| 316 | Portable ore milling plant | US56258866 | 1966-07-05 | US3402896A | 1968-09-24 | DAMAN ARTHUR C |
| 317 | Phase desliming and concentration of potash ores | US27440563 | 1963-04-22 | US3259237A | 1966-07-05 | SCHOELD EDMUND A; EGBOM CLARENCE W |
| 318 | Method of and arrangement for dressing moist raw materials with solid undesired inclusions | US33956763 | 1963-12-05 | US3254882A | 1966-06-07 | HELMING BERND H |
| 319 | Method of preparing metamorphosed iron ores for concentration | US12615861 | 1961-07-24 | US3148838A | 1964-09-15 | EDGAR CAVANAGH PATRICK |
| 320 | Reflotation concentration of sylvite | US13594861 | 1961-09-05 | US3137650A | 1964-06-16 | SMITH RANDAL E; REITER JOSEPH S |
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