DE1966154C - Process for the electrostatic preparation of salt mines - Google Patents
Process for the electrostatic preparation of salt minesInfo
- Publication number
- DE1966154C DE1966154C DE1966154C DE 1966154 C DE1966154 C DE 1966154C DE 1966154 C DE1966154 C DE 1966154C
- Authority
- DE
- Germany
- Prior art keywords
- kieserite
- salt
- separation
- dehydrated
- electrostatic
- 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
Links
- 150000003839 salts Chemical class 0.000 title claims description 5
- 239000011780 sodium chloride Substances 0.000 title claims description 5
- 238000000034 method Methods 0.000 title description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L mgso4 Chemical class [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 8
- 230000003750 conditioning Effects 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 235000010755 mineral Nutrition 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical class [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003463 adsorbent Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052928 kieserite Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000015450 Tilia cordata Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 150000004688 heptahydrates Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Description
Das deutsche Patent 1 249 783 betrifft ein Verfahren zur elektrostatischen Aufbereitung von Mineralgemischen, insbesondere Salzmineralien oder Salzgemengen in bekannten Scheidern, insbesondere Freifallscheidern, mit chemischen Konditionierungsmitteln, welches dadurch gekennzeichnet ist, daß nach hintereinander erfolgender, kontinuierlich oder diskontinuierlicher Behandlung des Mineralgemisches mit hochdispersen Wasseradsorptionsmitteln in pulveriger oder körniger oder granulierter Form, wie Kieselsäuren, Natronkalk, durch intensives Mischen in etwa 1 Minute bis etwa 1 Stunde, vorzugsweise in 1 bis S Minuten, und mit chemischen Konditionirungsmitteln, gegebenenfalls in umgekehrter Reihenfolge, die Trennung ein- oder mehrstufig durchgeführt ■wird und daß die Trennung bei Temperaturen erfolgt, die zwischen Raumtemperatur und der Zersetzungsbzw. Verdampfungstemperatur, insbesondere bei 60° C erfolgt.The German patent 1 249 783 relates to a method for the electrostatic processing of mineral mixtures, in particular salt minerals or salt mixtures in known separators, in particular free-fall separators, with chemical conditioning agents, which is characterized in that after successively, continuously or discontinuously Treatment of the mineral mixture with highly dispersed water adsorbents in powdery form or in granular or granulated form, such as silicas, soda lime, by intensive mixing in about 1 minute to about 1 hour, preferably in 1 to 5 minutes, and with chemical conditioning agents, optionally in the reverse order, the separation carried out in one or more stages ■ and that the separation takes place at temperatures between room temperature and Zersetzungbzw. Evaporation temperature, especially at 60 ° C he follows.
Die nach diesem Verfahren verwendeten hochdispersen Wasseradsorptionsmitteln, die in pulvriger, körniger oder granulierter Form eingesetzt werden, wirken durch physikalische Adhäsion des Wassers, indem das Aufbereitungsgut ganz oder teilweise von anhaftenden Wasserfilmen befreit wird.The highly dispersed water adsorbents used in this process, which are in powdery, granular or granulated form are used, act through physical adhesion of the water, by completely or partially freed from adhering water films.
Es wurde nun ein Verfahren zur elektrostatischen Aufbereitung von Salzmineralien in bekannten Scheieiern mit chemischen Konditionierungsmitteln gefunden, welches dadurch gekennzeichnet ist, daß nach Behandlung des Kalirohsalres mit entwässertem Kieserit und mit Fettsäure als chemisches Konditionierungsmittel die Trennung in ein K2O-haltiges Konzentrat und in einen Rückstand bei niedriger Temperatur erfolgt und daß die Trennung bei einer relativen Luftfeuchte zwischen 5 und 30%, vorzugsweise von 20%, erfolgtA method for the electrostatic processing of salt minerals in known Scheiern with chemical conditioning agents has now been found, which is characterized in that after treatment of the potash with dehydrated kieserite and with fatty acid as chemical conditioning agent, the separation into a K 2 O-containing concentrate and a Residue takes place at low temperature and that the separation takes place at a relative humidity between 5 and 30%, preferably 20%
Das Verfahren der Erfindung wird durch folgendes Beispiel erläutert:The method of the invention is carried out by the following Example explained:
Aufbereitungsgut:Processing goods:
Hartsalz 15,6% K2OHard salt 15.6% K 2 O
32,0% MgSO4 32.0% MgSO 4
Absolute Luftfeuchte 6 g/m3 Absolute humidity 6 g / m 3
Relative Luftfeuchte 20%Relative humidity 20%
Trenntemperatur 300CSeparation temperature 30 0 C.
H2OH 2 O
2020th
400 g/t entwässerter
Kieserit ...400 g / t dehydrated
Kieserite ...
150 g/t Fettsäure150 g / t fatty acid
KjO-GehaUe, % Konz.KjO housing,% Conc.
34,834.8
ROckstandResidue
1,71.7
K2O-Anteile, Konz.K 2 O shares, conc.
60,060.0
RückstandResidue
4,04.0
Dieses Beispiel zeigt, daß bei Einsatz von entwässertem Kieserit als Absorptionsmittel für Wasser die elektrostatische Aufbereitung von Kalirohsalzen zur Gewinnung eines K2O-reichen Konzentrats bei Raumtemperatur ohne vorherige Luftentfeuchtung möglich ist, worin ein erheblicher technischer Fortschritt liegt. Entwässerter Kieserit steht aus dem Mineral Kieserit in großen Mengen zur Verfügung, so daß erst durch chemische Verfahren zu erzeugende hochdisperse Wasseradsorptionsmittel, wie feinteilige Kieselsäure, in Fortfall kommen.This example shows that when dehydrated kieserite is used as an absorbent for water, the electrostatic processing of crude potash salts to obtain a K 2 O-rich concentrate is possible at room temperature without prior air dehumidification, which represents a considerable technical advance. Dehydrated kieserite is available in large quantities from the mineral kieserite, so that highly dispersed water adsorbents, such as finely divided silica, which can only be produced by chemical processes, are no longer necessary.
Der überraschende technische Effekt der Wasserabsorption durch Kieserit beruht auf der raschen Absorption über die Stufe des Monohydrats bis zum Heptahydrat. Es kann also auch eine erhebliche Menge Wasser durch entwässerten Kieserit absorbiert werden, wobei die erforderliche Menge von der relativen Feuchte der Luft abhängig istThe surprising technical effect of water absorption by kieserite is based on the rapid Absorption through the level of the monohydrate to the heptahydrate. So it can also be a significant one Amount of water to be absorbed by dehydrated kieserite, the required amount being the relative Humidity of the air is dependent
Claims (2)
Family
ID=
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