| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Process for beneficiating particulate solids | US849959 | 1992-03-12 | US5280836A | 1994-01-25 | James K. Kindig |
| The present invention is further directed towards a method for determining the efficiency of separation of a dense media separation process. This method includes determining an apparent distance a particle must travel in a dense media cyclone to be correctly beneficiated. From this apparent distance, an apparent velocity a particle must achieve to be correctly beneficiated is calculated. This apparent velocity is used, along with cyclone geometry and operational parameters to calculate a divergence value which indicates the efficiency of separation. The present invention also includes a method for selecting cyclone geometry and operating parameters which includes determining separation efficiency and adjusting geometry and parameters in a manner to obtain improved efficiency. | ||||||
| 42 | Process for beneficiating particulate solids | US740956 | 1991-08-06 | US5153838A | 1992-10-06 | James K. Kindig |
| A method for determining the efficiency of separation of a dense media separation process is disclosed including determining an apparent distance a particle must travel to be correctly beneficiated and calculation of an apparent velocity for correct beneficiation. Apparent velocity, cyclone geometry, and operating parameters are used to calculate a divergence value which indicates the efficiency of separation. Cyclone geometry and operating parameters may be selected for use in a dense media separation process by adjusting geometry and operating parameters in a manner to obtain desired efficiency. | ||||||
| 43 | Testing method for determining the magnetic properties of ferromagnetic powders | US261769 | 1981-05-08 | US4369649A | 1983-01-25 | Karlheinz Uhle; Horst Kramer |
| The invention relates to a method permitting ferromagnetic powders for use in heavy medium suspensions for the float-sink dressing of minerals to be readily tested as to their efficiency in magnetic separation and demagnetization. To this end, the invention provides(a) for a heavy medium suspension specimen to be removed from the purification cycle directly downstream of the magnetic separation stage, for it to be freed from impurities by decantation, and its relative sedimentation velocity to be determined with the aid of a sedimentometer;(b) for a heavy medium suspension specimen to be removed from the purification cycle downstream of the demagnetization stage, for it to be freed from impurities by decantation, and for its relative sedimentation velocity to be determined with the aid of a sedimentometer; and(c) for the heavy medium suspension specimen according to (b) to be demagnetized in a cyclicly decreasing magnetic alternating field with a maximum field strength which is 1.1 to 1.5 times the maximum field strength of the magnetic separator, and for the relative sedimentation velocity of the specimen to be determined with the aid of sedimentometer. The ferromagnetic powder is reliably separable magnetically and demagnetizable with the aid of a demagnetizing means in the event of the relative sedimentation velocity according to (a) being at least ten times greater than the relative sedimentation velocity according to (c), and the relative sedimentation velocity according to (c) being at most 10% lower than that according to (b). | ||||||
| 44 | Testing method for determining the magnetic properties of ferromagnetic powders | US261744 | 1981-05-08 | US4369648A | 1983-01-25 | Karlheinz Uhle; Horst Kramer |
| The invention relates to a method permitting ferromagnetic powders to be readily tested for their qualification for use in heavy medium suspensions for the float-sink dressing of minerals. To this end, the invention provides(a) for ferromagnetic powder particles with a size within the range 63 to 100.mu. to be admixed with a quantity of a glycerol/water mixture necessary to obtain a heavy medium suspension having a specific density within the range 1.45 to 1.55 g/cm.sup.3 ;(b) for the heavy medium suspension to be demagnetized in a cyclicly decreasing alternating field at maximum field strengths within the range 1200 to 1600 amperes/cm and for its relative sedimentation velocity to be determined by means of a sedimentometer;(c) for the demagnetized heavy medium suspension to be magnetized in a magnetic steady field at field strengths within the range 700 to 900 amperes/cm and for its relative sedimentation velocity to be determined by means of a sedimentometer; and for(d) the magnetized heavy medium suspension to be demagnetized in a cyclicly decreasing alternating field at maximum field strengths within the range 1200 to 1600 amperes/cm and for its relative sedimentation velocity to be determined by means of a sedimentometer.Ferromagnetic powder is fully serviceable for use in heavy medium suspensions in the event of the relative sedimentation velocity determined in step (b) being smaller than 0.25 cm/second, that determined in step (c) being greater than 2.5 cm per second and that determined in step (d) being smaller than 0.4 cm/second. | ||||||
| 45 | Method for monitoring the efficiency of raw material beneficiation apparatus | US213677 | 1980-12-05 | US4345994A | 1982-08-24 | Joseph W. Leonard, III; Joseph W. Leonard, IV |
| A method for determining the efficiency of float-sink raw material separation units which achieve separation by specific gravity sorting of raw material in particle form introduced to a liquid bath. The efficiency is determined by introducing to the bath, with the raw material in particle form for separation, prepared particles of determined size and specific gravity and detecting the separation location of these prepared particles. | ||||||
| 46 | Process for inhibiting the corrosion of heavy pulps for heavy media separation of minerals | US607013 | 1975-08-22 | US4093538A | 1978-06-06 | Joachim Kandler; Klaus Komorniczyk; Mathias Reitz |
| The corrosion of aqueous heavy pulps which contain ferrosilicon with between 8 and 20 weight % of silicon as a heavy medium and are used in the heavy media separation of minerals is inhibited. To this end, the heavy pulp is used in admixture with between 0.1 and 0.8 weight % of a carboxy-alkane-phosphonic acid of the following formulae: ##STR1## in which R stands for hydrogen or alkyl having from 1 to 4 carbon atoms, or ##STR2## | ||||||
| 47 | Flotation of oxidized copper ores | US581267 | 1975-05-27 | US4011072A | 1977-03-08 | James B. Holman; John A. Cronin; Bernhard Lamby |
| Copper is recovered from an aqueous pulp of an ore containing both sulfide minerals and oxidized minerals by continuously monitoring the EMF of the pulp and adding a water-soluble sulfide to the pulp in an amount from 0.05 to 7 pounds of contained sulfur per ton of ore whenever and for so long as the pump EMF is above about -30 millivolts with reference to a standard silver-silver chloride electrode, and discontinuing such addition whenever such EMF in less than about -30 millivolts. Thereafter the pulp is subjected to a froth flotation operation in the presence of a collector for copper sulfide minerals to produce a concentrate containing most of the sulfide minerals and a substantial part of the oxidized minerals of the ore. | ||||||
| 48 | Device and method of density measurement and control of flotation systems | US21922172 | 1972-01-20 | US3834529A | 1974-09-10 | HART P |
| Two open-end tubes are vertically immersed, open-end down at substantially the same level, one near the place of entrance of a liquid in process in a series of treating vessels and the other near the outlet of the liquid whereby densities of the liquid at the respective locations are measured by means of a suitable pneumatic assembly, the density values are translated to and recorded as a pneumatic pressure differential and the pneumatic pressure differential is either (1) automatically converted to and recorded in meaningful values and the indicated adjustments manually made to restore and tend to maintain the optimum density differential, or (2) directed to an optimizer whereby optimum adjustments are automatically made to restore and tend to maintain a maximum density differential. Where a fluctuating level of liquid exists, two probes immersed at different depths to define a fixed stratum may be used in cooperation to obtain one density value.
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| 49 | Heavy liquid separation of brucite from associated minerals of brucitic ores | US3720308D | 1970-04-20 | US3720308A | 1973-03-13 | JEPSEN T |
| Brucite in finely divided condition is collected as a high grade concentrate of brucitic ores and other magnesium hydroxides by selective temperature control of heavy liquid media during continuous treatment. Ore is initially assayed to determine the specific gravity of its brucite content and methylene bromide as heavy liquid media will be used at its usual specific gravity of 2.48 at ambient temperature. If higher grade product is desired, changes in temperature of media are developed to obtain density drop to 2.40, for example. To change back to normal production media temperature is adjusted and no change in media composition is required.
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| 50 | Method and apparatus for controlling specific gravity in a heavy medium process | US23694462 | 1962-11-13 | US3246750A | 1966-04-19 | CHASE PAUL W; HENDRICKSON LUTHER G |
| 51 | Slime control in heavy-media ore separation | US4488760 | 1960-07-25 | US3098035A | 1963-07-16 | APLAN FRANK F |
| 52 | Separating apparatus with constant flow rate control | US38601653 | 1953-10-14 | US2833411A | 1958-05-06 | MICHIEL BOSMAN; BECKERS JOZEF M H |
| 53 | Method and apparatus for heavymedia separation | US49874343 | 1943-08-16 | US2428777A | 1947-10-14 | BITZER EDMUND C |
| 54 | Apparatus for gravity separation of granular material | US37351241 | 1941-01-07 | US2320519A | 1943-06-01 | ALGERNON HIRST ARTHUR |
| 55 | Concentration of ores and other minerals by the sink and float process | US23374538 | 1938-10-07 | US2206574A | 1940-07-02 | ANDREW PEARSON |
| 56 | Concentration | US1521735 | 1935-04-08 | US2135957A | 1938-11-08 | ERB WUENSCH CHARLES |
| 57 | Non-attrition process of and apparatus for washing and sorting coal. | US9677416 | 1916-05-11 | US1224350A | 1917-05-01 | ADAMS HENRY |
| 58 | Improvement in condensers for steam-engines | US210519D | US210519A | 1878-12-03 | ||
| 59 | Process for reducing sulfur emissions with calcium-containing sorbents | US876496 | 1992-04-30 | US5368617A | 1994-11-29 | James K. Kindig |
| An improved process for reducing sulfur oxide emissions from the combustion of coal is disclosed wherein a fuel mixture comprising calcium-containing sorbent and coal is fed to the burners and sulfur oxides react with calcium from the sorbent in a high temperature sulfur capture region, followed by additional sulfur capture in a lower temperature, high humidity sulfur capture region prior to separation of particulates from the flue gas. Sulfur capture using calcium-containing sorbents can be combined with aggressive coal beneficiation techniques to further enhance reduction of sulfur oxide emissions. The process of the invention provides a process for reducing sulfur oxides that efficiently uses calcium-containing sorbents to enhance sulfur capture while reducing the need for expensive equipment or process modifications. | ||||||
| 60 | Coal cleaning process | US988417 | 1992-12-09 | US5348160A | 1994-09-20 | James K. Kindig |
| Fine particle coal is beneficiated in specially designed dense medium cyclones to improve particle acceleration and enhance separation efficiency. Raw coal feed is first sized to remove fine coal particles. The coarse fraction is then separated into clean coal, middlings, and refuse. Middlings are comminuted for beneficiation with the fine fraction. The fine fraction is deslimed in a countercurrent cyclone circuit and then separated as multiple fractions of different size specifications in dense medium cyclones. The dense medium contains ultra-fine magnetite particles of a narrow size distribution which aid separation and improves magnetite recovery. Magnetite is recovered from each separated fraction independently, with non-magnetic effluent water from one fraction diluting feed to a smaller-size fraction, and improving both overall coal and magnetite recovery. Magnetite recovery is in specially designed recovery units, based on particle size, with final separation in a rougher-cleaner-scavenger circuit of magnetic drum separators incorporating a high strength rare earth magnet. | ||||||
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