| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Activator-frother composition | US140578 | 1993-10-21 | US5389274A | 1995-02-14 | Hector C. Fernandez |
| An activator-frother composition of good selectivity which can be used as additional reagent for the flotation of minerals of finely ground sulfide type and as sole reagent in the treatment of flotation tailings, which consists of about 1% to 10% by weight of pine oil, about 10% to 30% by weight of sodium sulfide, about 20% to 40% by weight of sodium bicarbonate. The composition has the advantage of requiring little time of homogenization and conditioning in order to be sufficiently soluble, to be stable within a wide pH range, and not to be contaminating. | ||||||
| 242 | Phosphate rock benefication | US814437 | 1991-12-30 | US5221466A | 1993-06-22 | Steven C. Garcia; Charles T. Staniek |
| This invention provides an improved method for the rougher flotation of phosphate ore using sodium carbonate to control the pH at about 9.6-10.5. The method facilitates improved recovery of phosphate from its ore; in addition the Bone Phosphate of Lime (BPL) of the phosphate concentrate increases, which provides further advantages in that subsequent steps are improved by virtue of receiving a feed of greater purity. There are also certain environmental advantages obtained when ammonia is replaced with sodium carbonate and the operational safety of the flotation system is enhanced when ammonia is replaced with sodium carbonate. | ||||||
| 243 | Process for the separation of minerals by flotation | US412596 | 1989-09-26 | US5047144A | 1991-09-10 | Bohnslav Dobias; Horst Michaud; Josef Seeholzer |
| The present invention provides a process for the separation of minerals by flotation in the presence of activators and suppressors. Activators are cation-active condensation products and suppressors are anion-active products of aminoplast formers, formaldehyde and amines, ammonium salts, acids or a sulphite, in combination with either an anion-active or cation-active tensides. | ||||||
| 244 | Flotation aid and process for removal of impurities from silicate minerals | US407425 | 1989-09-14 | US5037534A | 1991-08-06 | John M. Harrison |
| A novel flotation aid for use in the flotation removal of contaminates or impurities from mineral slurries. The flotation aid is an alkali aluminate compound. The flotation aid may be incorporated into a flotation reagent system that includes a chemical collector. | ||||||
| 245 | Ore flotation process using carbamate compounds | US538864 | 1990-06-15 | US5015368A | 1991-05-14 | Stephen A. Di Biase; James H. Bush |
| The present invention relates to an improved process for beneficiating an ore. In particular, the process is useful for beneficiating ores and recovering metal values such as gold, copper, lead, molybdenum, zinc, etc., from the ores. In one embodiment, the process comprises(A) forming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is at least one carbamate represented by the formula: ##STR1## wherein each R.sub.1 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.1 taken together with R.sub.2 and the nitrogen atom form a five, six or seven member heterocyclic group; each R.sub.2 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.2 taken together with R.sub.1 and the nitrogen atom form a five, six or seven member heterocyclic group; and R.sub.3 is a hydrocarbylene group having from 1 to about 10 carbon atoms;(B) subjecting the slurry from step (A) to froth flotation to produce a froth; and(C) recovering a mineral from the froth. | ||||||
| 246 | Recovery in the phosphate ore double flotation process | US597113 | 1984-04-05 | US4867867A | 1989-09-19 | Geroge M. Lilley |
| This invention relates to a method of enhanced recovery of phosphate in the double flotation process for the benefication of phosphate ore, more particularly to the use of pH modifiers-silica depressants:sodium silicate;soda ash (Na.sub.2 CO.sub.3); orsoda silicate and soda ash, alone or in combination with one or more ingredients selected from the group consisting of: starch, dextrin, sodium sulfite and trisodium phosphate, added to the casutic or ammonia reagent used to prepare the patty acid-fuel oil mixture in the first stage of the double flotation process. | ||||||
| 247 | Chemical conditioning of fine coal for improved flotation and pyrite rejection | US58909 | 1987-06-05 | US4828686A | 1989-05-09 | Jan D. Miller; Yi Ye |
| A method for enhancing hydrophobicity of high volatile bituminous coal and coals of a lower grade and for separating ash and sulfur (including pyritic sulfur) contaminants from coal in a floatation process. The method comprises the steps of grinding the coal to small particulate size, forming a slurry of the ground coal and mixing the slurry with at least one compound selected from the group comprising inorganic peroxy compounds, the preferred compound being oxone which is a mixture of potassium monopersulfate, potassium hydrogen sulfate and potassium sulfate. This slurry is allowed to react to condition the particulate coal and develop increased hydrophobicity for the coal while depressing the sulfur contaminants and ash during froth flotation. | ||||||
| 248 | Pyrite depressants useful in the separation of pyrite from coal | US187115 | 1988-04-28 | US4826588A | 1989-05-02 | Richard R. Klimpel; Robert D. Hansen; Michael J. Fazio |
| The separation of coal from pyrite during a froth flotation process is enhanced by the use of an effective amount of a pyrite depressant. The depressant is a hydrophilic nitrogen-sulfur-containing compound. | ||||||
| 249 | Froth flotation of bastnaesite | US933845 | 1986-11-24 | US4772382A | 1988-09-20 | Srdjan Bulatovic |
| A process is described for the mineral separation of rare earth metal compounds, such as bastnaesite, contained in oxidic minerals. The process is a froth flotation process utilizing a novel collector emulsion, which is an emulsified mixture of:a secondary amine modified sulphonated fatty acid,a high rosin containing tall oil fatty acid,an anionic petroleum sulphonate, anda high molecular weight primary amine.The collector emulsion mixture is added to the aqueous slurry of the comminuted rare earth metal compound containing oxidic mineral, which has been previously conditioned in a conventional manner. The conditioning reagents may include alkaline pH modifiers and gangue depressants such as citric acid, oxalic acid, sodium silicates and fatty acids.The rare earth metal compounds will be concentrated in the froth, and are separated in the conventional manner. | ||||||
| 250 | Method for the froth flotation of coal | US46351 | 1987-05-06 | US4770767A | 1988-09-13 | Robert D. Hansen; Richard R. Klimpel |
| The froth flotation of coal is conducted in the presence of a conditioner of an oxygen containing compound of the formula:R.sub.1 --O--R.sub.2).sub.n (I)wherein R.sub.1 and each R.sub.2 are independently saturated hydrocarbyls and n is from 1 to about 3. | ||||||
| 251 | Process for increasing the selectivity of mineral flotation | US41272 | 1987-04-22 | US4735783A | 1988-04-05 | Srdjan Bulatovic |
| An aqueous solution containing a water soluble polyvalent metal sulphate, an alkali metal silicate and an alkali metal metabisulphite is described which is added to a slurry of a copper mineral bearing ore to be subjected to a froth flotation step for obtaining a copper concentrate. The aqueous solution is added to enhance the selectivity of conventional flotation collectors and depressants when the valuable minerals are finally disseminated in the host ore, which is then required to be ground to very small particle sizes to achieve the desired liberation. Other valuable minerals such as those bearing zinc and lead, may be recovered from the tailing. | ||||||
| 252 | Flotation of upper zone copper sulfide ores | US574717 | 1984-01-30 | US4585549A | 1986-04-29 | Subhaschandra G. Malghan |
| The present invention comprises a method of recovering copper minerals from ores containing both sulfide and oxidized copper sulfide minerals, such as found, for example, in surface oxidized porphyry ores. Accordingly, one embodiment of the present invention comprises first conditioning a pulp of an ore containing copper sulfide and oxidized copper sulfide minerals in the presence of an alkaline agent, next subjecting the so conditioned ore to a second conditioning step in the presence of a collector, subsequently adding a surface modifying agent to the so treated ore at a rate and in an amount sufficient to decrease the platinum electrode potential of the pulp when measured against a saturated calomel electrode to a minimum of -100 mV, then conditioning the ore only for a time sufficient to achieve intimate contact between the ore particles, and thereafter subjecting the so treated ore to conventional flotation. | ||||||
| 253 | Process for the froth flotation of complex metal compounds | US545510 | 1983-10-26 | US4561970A | 1985-12-31 | Seppo O. Heimala; Kaarlo M. J. Saari |
| The invention relates to a process for the froth flotation of complex ores. In accordance with this invention, froth flotation is carried out by using a collector and froth flotation conditions for which it has been calculated in advance that the said mineral and the collector form stable surface compounds. The conditions include the electrochemical potential of the system, the concentration of the collector, the pH, and other physical factors. According to this invention it has been observed that by adjusting the potential and the concentration of the collector separately for each mineral, each mineral can be frothed out separately from the slurry, the process being in this case specific for the mineral. When so desired, the different minerals of the ore slurry can also be frothed simultaneously by selecting the conditions where the Pourfaix-type diagrams of all minerals in said complex ore overlap under the conditions in question. | ||||||
| 254 | 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. | ||||||
| 255 | Collector compositions for froth flotation and process for making same | US398428 | 1982-07-14 | US4410439A | 1983-10-18 | Ronald D. G. Crozier |
| Dialkyl xanthogen formates are known collectors, but the reaction that produces them, between an alkaline alkyl xanthate and an alkaline chloroformate, also causes side reactions which produce varying amounts of xanthic anhydride, carbonyl sulfide and dialkyl carbonate as by-products, and yield of formate may be as low as 30%. There are here disclosed processing schemes for controlling the amount and type of products and by-products produced in the reaction, and flotation tests show that certain product mixtures are significantly improved collectors for sulfide ores. | ||||||
| 256 | Process for the enhanced separation of impurities from coal and coal products produced therefrom | US267777 | 1981-05-28 | US4406664A | 1983-09-27 | Lester E. Burgess; Karl M. Fox; Phillip E. McGarry; David E. Herman |
| An improved process for the beneficiation of coal and the separation of impurities therefrom comprising subjecting coal to surface treatment by contact with an aqueous medium comprising polymerizable monomer, polymerization catalyst and liquid organic carrier, thereby rendering said coal hydrophobic and oleophilic, the improvement comprising the high shear intermixing of the surface treated coal with at least one water wash medium thereby providing for the removal of further hydrophilic impurities, such as mineral ash from the coal. Apparatus for carrying out the process and the products prepared therefrom are also provided. | ||||||
| 257 | Humic flotation of wet process phosphoric acid as a pretreatment step in the recovery of uranium | US248125 | 1981-03-27 | US4402920A | 1983-09-06 | Jose G. Lopez; Victor J. Barnhart |
| An acidic solution containing metal values and also containing humic acid impurities, is purified by: (1) forming a gas in the acid solution, (2) adding high molecular weight anionic organic flocculant in a volume ratio of gas containing acid solution: flocculant of 1,000:0.002 to 0.10, to form a bottom, purified, aqueous acidic phase containing metal values and a top flocculated humic acid impurities froth phase and (3) removing the humic acid froth phase. | ||||||
| 258 | Preparation of dialkyldithiophosphinates | US232102 | 1981-02-06 | US4308214A | 1981-12-29 | Allan J. Robertson; Tony Ozog |
| Dialkylphosphine is added to a mixture of sulfur and water at 50.degree.-90.degree. C. After approximately 25% of the dialkylphosphine is charged, an alkali, such a sodium hydroxide, is added to neutralize the dialkyldithiophosphinic acid that forms. At this elevated temperature the neutralization reaction proceeds rapidly thereby preventing any alkali from reacting with the sulfur to form sulfides. Dialkyldithiophosphinate yields from this process are on the order of about 95-98%. | ||||||
| 259 | Froth promotor for flotation of coal | US161244 | 1980-06-20 | US4308133A | 1981-12-29 | Wilfred C. Meyer |
| Aromatic polycyclic, hydrocarbon compounds bearing at least one nuclear sulfonic acid or sulfonate moiety are useful as froth promoters to improve the recovery of clean coal in the froth flotation of finely-divided coal. Disulfonated diphenyl ether compounds bearing at least one nuclear alkyl group of from 10 to 22 carbon atoms are particularly efficacious. | ||||||
| 260 | Method for brightening natural calcitic ores | US26362 | 1979-04-02 | US4293097A | 1981-10-06 | Herbert I. Lewis; Anthony D. McConnell; William M. Price |
| A method is disclosed for processing a natural calcitic ore to yield a finely divided calcium carbonate particulate of very high brightness characteristics. The natural calcitic ore is initially coarse-milled to produce a product wherein no more than 5% by weight of the particulate is +325 mesh, and no more than 35% by weight of the particles are of less than 2 microns E.S.D. This coarse-milled product is then subjected as an aqueous slurry containing less than 40% and preferably less than 30% solids by weight, to a froth flotation, which separates with the froth the relatively coarse colorbodies liberated in the initial grinding. Preferable compositions for use in the froth flotation comprise 1-substituted-2-alkyl imidazolines or the salt derivatives thereof, with such compounds being utilized in admixture with a substantially non-polar aliphatic compound having from 10 to 20 carbon atoms in its longest straight chain. The purified underflow from the flotation step is dewatered to at least 60% solids by weight, and is wet-milled, as for example in a sand mill, to yield an output product wherein at least 80% by weight of the resultant particulate has an E.S.D. of less than 2 microns, the product being further characterized by a brightness of at least 95 on the G.E. scale. | ||||||
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