DE4039470C1 - Useful material obtd. e.g. kieserite from potassium mineral - by milling, adding conditioning agent, adding rock salt to increase surface charge density and sepg. electrostatically - Google Patents
Useful material obtd. e.g. kieserite from potassium mineral - by milling, adding conditioning agent, adding rock salt to increase surface charge density and sepg. electrostaticallyInfo
- Publication number
- DE4039470C1 DE4039470C1 DE19904039470 DE4039470A DE4039470C1 DE 4039470 C1 DE4039470 C1 DE 4039470C1 DE 19904039470 DE19904039470 DE 19904039470 DE 4039470 A DE4039470 A DE 4039470A DE 4039470 C1 DE4039470 C1 DE 4039470C1
- Authority
- DE
- Germany
- Prior art keywords
- rock salt
- added
- kieserite
- sepg
- charge density
- 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.)
- Expired - Lifetime
Links
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 25
- 235000002639 sodium chloride Nutrition 0.000 title claims abstract description 25
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 20
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 title claims abstract description 13
- 229910052928 kieserite Inorganic materials 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 title claims description 9
- 239000003795 chemical substances by application Substances 0.000 title abstract description 3
- 230000003750 conditioning effect Effects 0.000 title abstract description 3
- 238000003801 milling Methods 0.000 title abstract 2
- 229910001577 potassium mineral Inorganic materials 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000007873 sieving Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims abstract 5
- 238000000926 separation method Methods 0.000 claims description 13
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims 2
- 235000011164 potassium chloride Nutrition 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 5
- 239000011149 active material Substances 0.000 abstract 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 abstract 1
- 235000019341 magnesium sulphate Nutrition 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 229910052925 anhydrite Inorganic materials 0.000 description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 5
- WZISDKTXHMETKG-UHFFFAOYSA-H dimagnesium;dipotassium;trisulfate Chemical compound [Mg+2].[Mg+2].[K+].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O WZISDKTXHMETKG-UHFFFAOYSA-H 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical class [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000001143 conditioned effect Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 238000005029 sieve analysis Methods 0.000 description 2
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C7/00—Separating solids from solids by electrostatic effect
- B03C7/003—Pretreatment of the solids prior to electrostatic separation
-
- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C7/00—Separating solids from solids by electrostatic effect
- B03C7/006—Charging without electricity supply, e.g. by tribo-electricity or pyroelectricity
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Erhöhung und Verbesserung der Aufladung bei der elektrostatischen Trennung von Kalirohsalzen.The invention relates to a method for increasing and Improvement of the charge in the electrostatic Separation of potash salts.
Das elektrostatische Verfahren zur Trennung von fein teiligen Stoffen in Freifallscheidern hat insbesondere für die Verarbeitung von Kalirohsalzen große tech nische Bedeutung erlangt.The electrostatic method for the separation of fine particular substances in free-fallers in particular for the processing of potash salts great tech acquired niche significance.
Vor dem eigentlichen Trennprozeß wird das aufgemahle ne Kalirohsalz mit einem Konditionierungsmittel konditioniert, erwärmt und mit Luft definierter Feuchte ins Gleichgewicht gebracht. Das Kalirohsalz lädt sich dabei selektiv auf, wobei das Aufladungs vorzeichen vom Konditionierungsmittel abhängig ist. Anschließend läßt sich das Kalirohsalz im elektro statischen Freifallscheider in seine Komponenten auftrennen. Das elektrostatische Verfahren zur Trennung von Kalirohsalzen ist in "Chemie, Ingenieur, Technik" 55, (1983), 39, ausführlich diskutiert.This is boiled down before the actual separation process a potash salt with a conditioner conditioned, heated and defined with air Moisture balanced. The potash salt charges itself selectively, the charging sign depends on the conditioning agent. Subsequently, the Kalirohsalz can be in the electro static free fall separator in its components separate. The electrostatic separation process by Kalirohsalzen is in "Chemistry, Engineer, Engineering" 55, (1983), 39, discussed in detail.
Die DE-PS 16 67 814 beschreibt die Gewinnung des Minerals Kieserit und offenbart die verwendeten Kondi tionierungsmittel. Je reiner die zu gewinnenden Materialien sein sollen, je weniger Fremdsalze kommen als entgegengesetzte Ladungsträger in Betracht. Es müssen deshalb große Mengen des zu gewinnenden Mate rials im Kreise gefahren werden.DE-PS 16 67 814 describes the recovery of the Minerals Kieserite and reveals the used Kondi tionierungsmittel. The purer the ones to be won Be materials, the less foreign salts come as opposite charge carriers into consideration. It therefore, have large amounts of the winning mate rials in circles.
In der DE-PS 11 80 331 wird z. B. Alundum, das aus geschmolzenen Aluminiumoxid-Kügelchen besteht, in Form von Stücken, auf denen Konditionierungsmittel absorbiert sind, dem Trenngut zugegeben, um so eine Verbesserung der Trennbedingungen zu erreichen. In DE-PS 11 80 331 z. B. Alundum, that consists of molten alumina beads, in Shape of pieces on which conditioners are absorbed, added to the material to be separated, so a Improvement of the separation conditions to achieve.
Es wurde nun überraschenderweise gefunden, daß durch Zugabe von Steinsalz, um dessen Abscheidung es in entscheidenem Maße selbst geht, eine bemerkenswerte Verbesserung der Trennergebnisse erzielt werden kann.It has now surprisingly been found that by Addition of rock salt to its deposition in it decisive degree goes by itself, a remarkable one Improvement of the separation results can be achieved.
Dabei wird das Steinsalz in einer definierten Korn größe, vorzugsweise 1-4 mm, angewandt und dem bereits konditioniertem Gemenge zugegeben; durch Vermischen und damit verbundener gegenseitiger Reibung erhöht sich die Oberflächenladungsdichte auf den Salzen. Als besonders wirksam erweist sich das zugegebene Steinsalz dort, wo sich der Wertstoff bereits in angereicherter Form befindet, wie z. B. bei angerei cherten KCl- bzw. Kieseritfraktionen.Here, the rock salt in a defined grain size, preferably 1-4 mm, applied and already conditioned mixture added; by mixing and associated mutual friction increases the surface charge density on the salts. The added one proves particularly effective Rock salt where the recyclable material is already in Enriched form is such. For example, at a job protected KCl or Kieseritfraktionen.
Vorteilhafterweise wird die grobe NaCl-Fraktion nach dem Aufladungsvorgang, aber vor der Aufgabe auf das elektrostatische Feld, durch Siebung abgetrennt, zurückgeführt und wiederverwendet , um weiteres Ma terial dem gleichen Aufladungsvorgang zu unterziehen.Advantageously, the coarse NaCl fraction is after the boot process, but before posting on the electrostatic field, separated by sieving, returned and reused to further Ma material to undergo the same charging process.
Das NaCl kommt in einer Menge von 5 bis 50%, vorzugs weise 10-30%, zur Anwendung.The NaCl comes in an amount of 5 to 50%, preferably Wise 10-30%, for use.
Das Verfahren der Erfindung wird durch die nachfolgen den Beispiele näher erläutert. Es wird ein Kaliroh salz mit 11,7% K2O angesetzt, das im einzelnen fol gende Mineralzusammensetzung hat:The method of the invention is explained in more detail by the following examples. It is a Kaliroh salt with 11.7% K 2 O is used, which has the following fol lowing mineral composition:
18,1% Sylvin
29,1% Kieserit
1,2% Langbeinit
0,5% Anhydrit
51,1% Steinsalz + Sonstiges18.1% Sylvin
29.1% kieserite
1.2% langbeinite
0.5% anhydrite
51.1% rock salt + other
Siebanalyse des Rohrsalzes:Sieve analysis of the tube salt:
Auf einer großtechnischen Anlage werden jeweils 100 t/h Kalirohsalz mitOn a large-scale plant will be respectively 100 t / h Kalirohsalz with
20 g/t Salicylsäure
60 g/t Fettsäure
100 g/t Ammoniumacetat20 g / t salicylic acid
60 g / t fatty acid
100 g / t ammonium acetate
konditioniert und in einem Fließbettaufwärmer mit Luft bei einer relativen Feuchte von 10% fluidi siert, dabei triboelektrisch aufgeladen, auf einen Röhrenfreifallscheider in einem elektrostatischen Feld bei einer Feldstärke von 4 KV/cm getrennt. Ergebnisse gemäß der Erfindung und nach dem Stand der Technik enthalten die folgenden Beispiele:conditioned and in a fluidized bed warmer with Air at a relative humidity of 10% fluidi siert, while triboelectrically charged, on one Tubular free-fall separator in an electrostatic Field separated at a field strength of 4 KV / cm. Results according to the invention and to the state The technique includes the following examples:
Fig. 1 beschreibt einen vollständigen Versuch nach dem Stand der Technik. Man erhält an der positiv geladenen Elektrode in einer Menge von 75,6 t/h und einen Gehalt von 14,9 % K2O. Fig. 1 describes a complete experiment according to the prior art. The positively charged electrode is obtained in an amount of 75.6 t / h and a content of 14.9% K 2 O.
Die Mineralanalyse ist:The mineral analysis is:
23,4% Sylvin
8,8% Kieserit
0,3% Langbeinit
0,3% Anhydrit
67,2% Steinsalz + Sonstiges.23.4% Sylvin
8.8% kieserite
0.3% langbeinite
0.3% anhydrite
67.2% rock salt + other.
Die Fraktion am negativen Pol wird in der zweiten Trennstufe nachgetrennt gemäß Fig. 1, und man be kommt in der dritten Trennstufe schließlich angerei cherten Kieserit in einer Menge von 24,4 t/h und einen Gehalt von 1,9 % K2O und der Mineralzusammen setzung vonThe fraction at the negative pole is separated in the second separation stage shown in FIG. 1, and be be in the third separation stage finally enriched chert kieserite in an amount of 24.4 t / h and a content of 1.9% K 2 O and the mineral composition of
1,6% Sylvin
92,0% Kieserit
3,9% Langbeinit
1,1% Anhydrit
1,4% Steinsalz + Sonstiges1.6% Sylvin
92.0% kieserite
3.9% langbeinite
1.1% anhydrite
1.4% rock salt + other
Bei dem Versuch der Erfindung, der in Fig. 2 iden
tisch ist, erhält man folgende Ergebnisse:
In Trennstufe I gibt es einen Rückstand in einer
Menge von 74,7 t/h und einen Gehalt von 15%
K2O und die Mineralzusammensetzung vonIn the experiment of the invention, which is identical in Fig. 2 table, gives the following results:
In separation stage I, there is a residue in an amount of 74.7 t / h and a content of 15% K 2 O and the mineral composition of
23,7% Sylvin
7,7% Kieserit
0,3% Langbeinit
0,3% Anhydrit
68,0% Steinsalz + Sonstiges23.7% Sylvin
7.7% kieserite
0.3% langbeinite
0.3% anhydrite
68.0% rock salt + other
Der Unterschied zum Stand der Technik erklärt sich durch die geänderte Zurückführung aus der Trenn stufe II. Nach der Trennstufe I wird der dort an fallenden Menge von ca. 50-60 t/h nämlich grobes NaCl in einer Menge von ca. 5-20 t/h und der fol genden Siebanalyse zugesetzt. The difference to the state of the art is explained by the changed repatriation from the separation stage II. After the separation stage I will be there falling amount of about 50-60 t / h namely coarse NaCl in an amount of about 5-20 t / h and the fol Sieben analysis added.
Siebanalyse des groben Steinsalzes:Sieve analysis of coarse rock salt:
Gemeinsam wird hiermit der Aufladungsvorgang voll zogen und bei 1,5 mm abgesiebt. Der Unterlauf des Siebes geht auf die II. Trennstufe, der Grobanteil wird wiederverwendet.Together this completes the charging process pulled and screened at 1.5 mm. The lower reaches of the Siebes goes to the II. Trennstufe, the coarse fraction will be reused.
In der II. Trennstufe erscheint nun der angereicherte Kieserit in einer Menge von 25,3 t/h und 1,8% K2O und einer Mineralanalyse vonIn the II. Separation stage, the enriched kieserite now appears in an amount of 25.3 t / h and 1.8% K 2 O and a mineral analysis of
1,5% Sylvin
92,2% Kieserit
3,9% Langbeinit
1,1% Anhydrit
1,3% Steinsalz + Sonstiges1.5% Sylvin
92.2% kieserite
3.9% langbeinite
1.1% anhydrite
1.3% rock salt + other
Aus dem Vergleich der Zahlen ergibt sich eine größere Kieseritmenge und damit auch eine höhere Kieseritausbeute.From the comparison of the numbers results one larger Kieseritmenge and thus a higher Kieseritausbeute.
Nach der Erfindung erhält man eine MgSO4-Ausbeute von 80,6%, nach dem Stand der Technik lediglich eine solche von 77,5%.According to the invention gives a MgSO 4 yield of 80.6%, according to the prior art, only one of 77.5%.
Damit ist die positive Auswirkung des erfinderischen Verfahrens belegt.This is the positive impact of the inventive Procedure occupied.
Claims (7)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904039470 DE4039470C1 (en) | 1990-12-11 | 1990-12-11 | Useful material obtd. e.g. kieserite from potassium mineral - by milling, adding conditioning agent, adding rock salt to increase surface charge density and sepg. electrostatically |
| CA 2057165 CA2057165C (en) | 1990-12-11 | 1991-12-06 | Method of improvement of the yield of electrostatic separation of salts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904039470 DE4039470C1 (en) | 1990-12-11 | 1990-12-11 | Useful material obtd. e.g. kieserite from potassium mineral - by milling, adding conditioning agent, adding rock salt to increase surface charge density and sepg. electrostatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4039470C1 true DE4039470C1 (en) | 1992-01-30 |
Family
ID=6420037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19904039470 Expired - Lifetime DE4039470C1 (en) | 1990-12-11 | 1990-12-11 | Useful material obtd. e.g. kieserite from potassium mineral - by milling, adding conditioning agent, adding rock salt to increase surface charge density and sepg. electrostatically |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2057165C (en) |
| DE (1) | DE4039470C1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4214950C1 (en) * | 1992-05-06 | 1994-01-05 | Kali & Salz Ag | Increasing yield in electrostatic sepn. of hard salt contg. carnallite - by recycling residue from potash purificn. stage to potash sepn. from kieserite |
| RU2369558C2 (en) * | 2007-08-07 | 2009-10-10 | ОАО "Сильвинит" | Device for processing of sylvinite-carnallite raw materials |
| US7635822B2 (en) | 2006-08-04 | 2009-12-22 | K+S Aktiengesellschaft | Method for treating ground crude potassium salts that contain kieserite |
-
1990
- 1990-12-11 DE DE19904039470 patent/DE4039470C1/en not_active Expired - Lifetime
-
1991
- 1991-12-06 CA CA 2057165 patent/CA2057165C/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| Chem.-Ing. Techn. 55(1983), Nr. 1, S. 39-45 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4214950C1 (en) * | 1992-05-06 | 1994-01-05 | Kali & Salz Ag | Increasing yield in electrostatic sepn. of hard salt contg. carnallite - by recycling residue from potash purificn. stage to potash sepn. from kieserite |
| US7635822B2 (en) | 2006-08-04 | 2009-12-22 | K+S Aktiengesellschaft | Method for treating ground crude potassium salts that contain kieserite |
| RU2369558C2 (en) * | 2007-08-07 | 2009-10-10 | ОАО "Сильвинит" | Device for processing of sylvinite-carnallite raw materials |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2057165C (en) | 1996-07-09 |
| CA2057165A1 (en) | 1992-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8100 | Publication of the examined application without publication of unexamined application | ||
| D1 | Grant (no unexamined application published) patent law 81 | ||
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: KALI UND SALZ BETEILIGUNGS AKTIENGESELLSCHAFT, 341 |
|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: K + S AKTIENGESELLSCHAFT, 34119 KASSEL, DE |