DE1002702B - Process for foam swimming preparation, in particular of hard coal - Google Patents
Process for foam swimming preparation, in particular of hard coalInfo
- Publication number
- DE1002702B DE1002702B DEB38507A DEB0038507A DE1002702B DE 1002702 B DE1002702 B DE 1002702B DE B38507 A DEB38507 A DE B38507A DE B0038507 A DEB0038507 A DE B0038507A DE 1002702 B DE1002702 B DE 1002702B
- Authority
- DE
- Germany
- Prior art keywords
- flotation
- hard coal
- procedure according
- foam
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/08—Coal ores, fly ash or soot
Description
Verfahren zur Schaumschwimmaufbereitung, insbesondere von Steinkohle Die Schaumschwimmaufbereitung (Flotation) dient bekanntlich dem Zweck, das feinverteilte Haltige, z. B. Kohle oder Erz, von der Gangart zu trennen. Wenn die Teilchengröße der Gangart nicht zu gering ist, erzielt man unter Verwendung der üblichen Flotationsmittel im allgemeinen eine befriedigende Trennung, d. h., im Schaum reichert sich vorwiegend das Haltige an, während die überwiegenden Mengen der Gangart zu Boden sinken. Häufig liegt jedoch ein beträchtlicher Teil der Gangart -bis zu 30 %- in sehr feiner Verteilung, nämlich als Feinstschlamm, vor. In solchen Fällen bindet dieser Feinstschlamm sehr viel von dem Flotationsmittel, das nun für seine eigentliche Aufgabe, das Haltige zum Aufschwimmen zu bringen, nicht mehr zur Verfügung steht. Ein weiterer Nachteil ist, daß der Feinstschlamm ebenfalls aufschwimmt und das Konzentrat des Haltigen im Schaum verdünnt. Außerdem bildet sich ein sehr zäher und schwer zerstörbarer Schaum.Process for foam swimming preparation, in particular of hard coal As is well known, foam flotation serves the purpose of removing the finely divided Holding, z. B. coal or ore, to separate from the gangue. When the particle size the pace is not too low, can be achieved using the usual flotation agents generally a satisfactory separation, i.e. i.e., accumulates predominantly in the foam the steady on, while the vast majority of the gait sink to the ground. Frequently However, a considerable part of the gait - up to 30% - is very finely distributed, namely as fine sludge. In such cases this fine sludge binds very much much of the flotation agent, which is now used for its actual task, which is what it contains to float is no longer available. Another disadvantage is that the fine sludge also floats and the concentrate of what is contained diluted in the foam. In addition, a very tough and difficult to destroy one forms Foam.
Man hat schon vorgeschlagen, die geschilderten Nachteile durch Verwendung von Flotationszusätzen, wie Wasserglas, löslichen Fluorverbindungen, Stärke, Celluloseacetat und Mannolactam, zu beseitigen. Diese Zusätze sind jedoch nur in ziemlich großen Mengen, etwa 200 bis 4000g auf eine Tonne Haufwerk oder Kohleschlamm, wirksam. Das Verfahren wird dadurch unwirtschaftlich. Die große Menge an Zusätzen bringt je nach ihrer Art noch weitere Nachteile mit sich: Giftige Zusätze verbieten das Ablassen der Flotationsabwässer in den Vorfluter; die organischen Zusätze können schon während des Klärens Fäulnis verursachen.It has already been proposed to use the disadvantages outlined of flotation additives such as water glass, soluble fluorine compounds, starch, cellulose acetate and mannolactam, to eliminate. However, these additives are only in fairly large sizes Quantities, around 200 to 4000g per ton of pile or coal sludge, are effective. That This makes the process uneconomical. The large amount of additives brings depending on There are also other disadvantages of their kind: Toxic additives prohibit draining the flotation wastewater in the receiving water; the organic additives can already be used during cause putrefaction of clarification.
Es wurde nun gefunden, daß Carboxylgruppen oder Sulfonsäuregruppen enthaltende wasserlösliche oder-quellbare höhermolekulare Substanzen, die in größeren Mengen Verdickungsmittel sind, bei geringerer Konzentration, nämlich 0,1 bis 10 g/cbm Trübe, als Drücker für die Feinstschlämme der Gangart wirken. Carboxylgruppen enthaltende Substanzen sind z. B. Celluloseglykolsäureäther, sogenannter Holzäther, hergestellt aus Holz und Chloressigsäure, wie z. B. in der Patentschrift 712 666 beschrieben ist, Polyacrylsäure oder ihre Derivate mit einem K-Wert von 10 bis 150, Mischpolymerisate aus Acrylsäure und Styrol, Acrylsäure und Maleinsäure und deren Derivaten.It has now been found that carboxyl groups or sulfonic acid groups containing water-soluble or swellable higher molecular substances, which in larger Amounts of thickener are, at lower concentrations, namely 0.1 to 10 g / cbm turbidity, act as a trigger for the fine sludge of the gangue. Carboxyl groups containing substances are e.g. B. cellulose glycolic acid ether, so-called wood ether, made from wood and chloroacetic acid, such as B. in patent 712,666 is described, polyacrylic acid or its derivatives with a K value of 10 to 150, Copolymers of acrylic acid and styrene, acrylic acid and maleic acid and their Derivatives.
Sulfonsäuregruppen enthaltende Substanzen der genannten Art sind z. B. die nach Patentschrift 889 225 in Gegenwart von schwefliger Säure oder ihren Salzen hergestellten oder damit nachbehandelten Harnstoff-Formaldehyd-Kondensationsprodukte. Auch Polystyrolsulfonsäure ist brauchbar.Substances of the type mentioned containing sulfonic acid groups are, for. B. according to patent specification 889 225 in the presence of sulphurous acid or their Urea-formaldehyde condensation products prepared with salts or post-treated with them. Polystyrene sulfonic acid can also be used.
Die genannten Substanzen können für sich oder untereinander gemischt als freie Säuren oder als wasserlösliche Salze angewendet werden. Mischungen der genannten Zusätze haben häufig eine akkumulierende Wirkung.The substances mentioned can be mixed individually or with one another can be used as free acids or as water-soluble salts. Mixtures of the The additives mentioned often have an accumulating effect.
Da die Zusätze schon vor der Flotation in der Trübe gleichmäßig verteilt sein müssen, gibt man sie zweckmäßig beim Zerkleinern des Gemenges oder im Pumpensumpf zu.Because the additives are evenly distributed in the pulp before flotation must be, they are expediently given when crushing the mixture or in the pump sump to.
Als weitere Flotationsmittel werden die üblichen Chemikalien verwendet, z. B. Xanthate, Ester der Dithiophosphorsäure, Alkylaminsalze, Alkylsulfonate, Thiocarbanilid, Thiophenole, Pine 0i1, Mittelöle usw.The usual chemicals are used as additional flotation agents, z. B. xanthates, esters of dithiophosphoric acid, alkylamine salts, alkyl sulfonates, thiocarbanilide, Thiophenols, Pine 0i1, Middle Oils, etc.
Die Vorteile der neuen Zusätze sind, daß sie in sehr geringen Mengen wirken und die weitgehende Trennung von Haltigem und Gangart befördern, sie beeinträchtigen nicht die Wirkung der Flotationsmittel; die Abwässer haben einen sehr geringen Gehalt an Fremdstoffen, die zudem keine Fäulnis herbeiführen. Die geklärten Abwässer können daher ohne weiteres in die Vorflut abgelassen werden.The advantages of the new additives are that they are in very small quantities work and promote the extensive separation of the steady and the gait, impair them not the effect of the flotation agent; the wastewater has a very low content of foreign substances, which also do not cause any putrefaction. The treated wastewater can can therefore be easily drained into the receiving water.
In folgendem Beispiel sei der Erfolg dieser Erfindung, die sich besonders bei der Kohleflotation bewährt, erläutert.The following example is the success of this invention that stands out particularly proven in coal flotation, explained.
Die Flotation des Dickschlammes einer Kohlenwäsche mit 140/, Ascheanteil, bezogen auf Trockenschlamm, ergab die in der Tabelle gezeigten Vergleichswerte: Ausbringen 1) Flotation unter Verwendung von Mittelöl als Flotationsmittel ........ 90 % Kohle mit 4,6 % Asche 2) Flotation wie unter 1) mit 3 g Holzäther als Flotationszusatz ............ 94 % Kohle mit 4,2 % Asche 3) Flotation wie unter 1) mit 1 g Polyacrylsäure (K-Wert 75) als Zusatz .. 95 % Kohle mit 4,2 % Asche Dementsprechend steigt der Gehalt an Aschebildnern in den Flotationsabgängen.The flotation of the thick sludge of a coal washing machine with 140 /, ash content, based on dry sludge, the comparison values shown in the table resulted in: Spreading 1) Flotation using medium oil as flotation agent ........ 90% coal with 4.6% ash 2) Flotation as under 1) with 3 g of wood ether as a flotation additive ............ 94% coal with 4.2% ash 3) Flotation as under 1) with 1 g of polyacrylic acid (K value 75) as an additive .. 95% coal with 4.2% ash Content of ash formers in the flotation outlets.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB38507A DE1002702B (en) | 1955-12-29 | 1955-12-29 | Process for foam swimming preparation, in particular of hard coal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB38507A DE1002702B (en) | 1955-12-29 | 1955-12-29 | Process for foam swimming preparation, in particular of hard coal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1002702B true DE1002702B (en) | 1957-02-21 |
Family
ID=6965525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB38507A Pending DE1002702B (en) | 1955-12-29 | 1955-12-29 | Process for foam swimming preparation, in particular of hard coal |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1002702B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3779380A (en) * | 1971-10-12 | 1973-12-18 | Hercules Inc | Collector composition for ore flotation |
FR2358200A1 (en) * | 1976-07-16 | 1978-02-10 | Chem Y | FLOTATION PROCESS USING A SULPHONIC ACID POLYMER AS DEPRESSOR |
US4162966A (en) * | 1976-06-16 | 1979-07-31 | Nalco Chemical Company | Flotation of deep mined coal with water-in-oil emulsions of sodium polyacrylate |
FR2414958A2 (en) * | 1978-01-19 | 1979-08-17 | Nalco Chemical Co | PROCESS FOR IMPROVING THE YIELD OF CHARCOAL EXTRACTED IN A DEEP MINE SUBJECT TO CONCENTRATION BY FLOTATION |
US4222862A (en) * | 1978-10-06 | 1980-09-16 | Nalco Chemical Company | Flotation of oxidized coal with a latex emulsion of sodium polyacrylate used as a promoter |
US4222861A (en) * | 1978-06-08 | 1980-09-16 | Nalco Chemical Company | Treatment and recovery of larger particles of fine oxidized coal |
US4268379A (en) * | 1977-12-23 | 1981-05-19 | American Cyanamid Company | Selective flocculation for increased coal recovery by froth flotation |
EP0338778A2 (en) * | 1988-04-19 | 1989-10-25 | The Dow Chemical Company | Pyrite depressants useful in the separation of pyrite from coal |
-
1955
- 1955-12-29 DE DEB38507A patent/DE1002702B/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3779380A (en) * | 1971-10-12 | 1973-12-18 | Hercules Inc | Collector composition for ore flotation |
US4162966A (en) * | 1976-06-16 | 1979-07-31 | Nalco Chemical Company | Flotation of deep mined coal with water-in-oil emulsions of sodium polyacrylate |
FR2358200A1 (en) * | 1976-07-16 | 1978-02-10 | Chem Y | FLOTATION PROCESS USING A SULPHONIC ACID POLYMER AS DEPRESSOR |
US4268379A (en) * | 1977-12-23 | 1981-05-19 | American Cyanamid Company | Selective flocculation for increased coal recovery by froth flotation |
FR2414958A2 (en) * | 1978-01-19 | 1979-08-17 | Nalco Chemical Co | PROCESS FOR IMPROVING THE YIELD OF CHARCOAL EXTRACTED IN A DEEP MINE SUBJECT TO CONCENTRATION BY FLOTATION |
US4222861A (en) * | 1978-06-08 | 1980-09-16 | Nalco Chemical Company | Treatment and recovery of larger particles of fine oxidized coal |
US4222862A (en) * | 1978-10-06 | 1980-09-16 | Nalco Chemical Company | Flotation of oxidized coal with a latex emulsion of sodium polyacrylate used as a promoter |
EP0338778A2 (en) * | 1988-04-19 | 1989-10-25 | The Dow Chemical Company | Pyrite depressants useful in the separation of pyrite from coal |
EP0338778A3 (en) * | 1988-04-19 | 1991-01-16 | The Dow Chemical Company | Pyrite depressants useful in the separation of pyrite from coal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2329454A1 (en) | METHOD FOR RAPIDLY SELECTIVE FLOCKING OF KAOLIN SLURRY | |
DE1002702B (en) | Process for foam swimming preparation, in particular of hard coal | |
CH417311A (en) | Process for preparing purified aqueous dispersions of fibrous materials | |
DE2758873C3 (en) | Process for the precipitation of synthetic resin paint particles from air in paint mist wet separators in spray painting systems | |
CH694289A5 (en) | Cutting methods and cutting oil. | |
DE2900620A1 (en) | METHOD FOR BRIGHTENING NATURAL CALCITE-CONTAINING ORES OR MINERALS | |
EP0475969A1 (en) | Used of mixed hydroxy ethers as aids for drying solids materials. | |
DE1089906B (en) | Cleaning agent with low foaming power | |
DE347750C (en) | Swimming method for concentrating minerals | |
DE1769543A1 (en) | Foam inhibitor for aqueous systems | |
DE828839C (en) | Process for separating polyglycols from mixtures with addition products of alkylene oxides with hydroxyl- or carboxyl-containing organic compounds | |
DE1082270B (en) | Process for stabilizing up to 3% phenylphenols contaminated by ª ‡ -naphthol | |
DE2740548C2 (en) | Process for increasing the yield of oxidized coal subjected to froth flotation and treatment agents for such coal | |
DE622872C (en) | Process for the extraction of minerals from ores by the floating process | |
DE1094570B (en) | Flotation agent for clearing waste water containing solids from the pulp, paper and cardboard industries | |
DE745207C (en) | Process for cleaning pulp containing Trueben, such. B. Waste water from papermaking | |
DE973320C (en) | Preparations for treating water containing paper stock for the purpose of flocculation and cleaning | |
AT225651B (en) | Process for de-oiling petroleum deposits | |
DE662868C (en) | Process for clearing industrial and urban waste water | |
DE864382C (en) | Flotation of fine coal from 1 to 10 mm using the foam floating method | |
DE495949C (en) | Process for improving the dewatering of foam swimming concentrates | |
DE578819C (en) | Process for processing non-sulfidic ores and minerals using the floating process | |
DE537336C (en) | Process for the clarification of fibrous slurries | |
DE365678C (en) | Procedure for abolishing emulsions | |
AT116143B (en) | Method of concentrating minerals by swimming. |