DE473702C - Process for cleaning molten cement obtained from phosphates - Google Patents

Process for cleaning molten cement obtained from phosphates

Info

Publication number
DE473702C
DE473702C DEV23710D DEV0023710D DE473702C DE 473702 C DE473702 C DE 473702C DE V23710 D DEV23710 D DE V23710D DE V0023710 D DEV0023710 D DE V0023710D DE 473702 C DE473702 C DE 473702C
Authority
DE
Germany
Prior art keywords
phosphates
cement obtained
cleaning molten
cement
molten cement
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
Application number
DEV23710D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUGO VIERHELLER DR ING
Original Assignee
HUGO VIERHELLER DR ING
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HUGO VIERHELLER DR ING filed Critical HUGO VIERHELLER DR ING
Priority to DEV23710D priority Critical patent/DE473702C/en
Application granted granted Critical
Publication of DE473702C publication Critical patent/DE473702C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Description

Verfahren zur Reinigung von aus Phosphaten gewonnenem Schmelzzement Es ist bekannt, daß der bei der Volatilisierung von Phophor aus Phosphaten gewonnene Schmelzzement noch kleine, jedoch äußerst schädliche und gefährliche Mengen von Phosphiden und Carbiden, des Eisens, Calciums und Almnü*mm enthält. Es ist bis jetzt noch nicht gelungen, diese Verunreinigungen aus dem Schmelzbade so weit zu entfernen, daß sie keinen schädlichen Einfluß mehr auf die Qualität des Zementes oder bei der Verarbeitung ausüben können.Process for cleaning molten cement obtained from phosphates It is known that the phosphate obtained from the volatilization of phosphorus Molten cement still small but extremely harmful and dangerous amounts of Contains phosphides and carbides, of iron, calcium and almnu * mm. It is up to now has not yet succeeded in removing these impurities from the melt pool to such an extent that that they no longer have a harmful influence on the quality of the cement or in the Can exercise processing.

Erfinder hat nun erkannt, daß diese Verunreinigungen jedoch in ausreichend weitgehendem Maße und in wirtschaftUcher Weise unschädlich gemacht werden können, wenn, der Zement nach der VermaMung noch einem oxydierenden Glühprozeß unterworfen wird. Vorteilhafterweise schließt man diesen Prozeß unmittelbar der Verrnahlung an, indem man das die Mühle in sehr heißem Zustande verlassene Zementmehl noch eine beliebige Glüh:vorrichtung durchlaufen läßt, in welcher der Zement in Luft- oder Sauerstofiatmosphäxe bis zum Glü- hen erhitzt werden kann. Dadurch werden ne Phosphide und CarbIdle, die aus dem Schmelzbade nicht mehr entfernt werden können, in unschädliche, zum Teil flüchtige Verbindungen übergeführt, so daß sie als Verunreinigungen des Zementes nicht mehr angesprochen werden können, weil sie keinerlei schädigenden Einfluß mehr ausüben.The inventor has now recognized that these impurities can, however, be rendered harmless to a sufficient extent and in an economical manner if the cement is subjected to an oxidizing annealing process after it has been dimensioned. This process is advantageously immediately followed by grinding by letting the cement powder, which has left the mill in a very hot state, run through any annealing device in which the cement can be heated in an air or oxygen atmosphere until it is glowing. As a result, phosphides and carbides that can no longer be removed from the molten bath are converted into harmless, partly volatile compounds so that they can no longer be addressed as impurities in the cement because they no longer exert any damaging influence.

Claims (1)

PATENTANS-PRUCII: Verfahren zur Reinigung von aus Phosphaten gewonnenem Schmelzzernent, dadurch gekennzeichnet, daß der fertiggemahlene Zement eihern oxydierenden Glühprozeß unterworfen wird.PATENTANS-PRUCII: Process for the purification of phosphates obtained Melting core, characterized in that the ready-ground cement is oxidizing Is subjected to annealing process.
DEV23710D 1928-03-22 1928-03-22 Process for cleaning molten cement obtained from phosphates Expired DE473702C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV23710D DE473702C (en) 1928-03-22 1928-03-22 Process for cleaning molten cement obtained from phosphates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV23710D DE473702C (en) 1928-03-22 1928-03-22 Process for cleaning molten cement obtained from phosphates

Publications (1)

Publication Number Publication Date
DE473702C true DE473702C (en) 1929-03-18

Family

ID=7580704

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV23710D Expired DE473702C (en) 1928-03-22 1928-03-22 Process for cleaning molten cement obtained from phosphates

Country Status (1)

Country Link
DE (1) DE473702C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748873C (en) * 1940-05-21 1944-11-18 Process for extracting or refining metal in a rotary kiln with the simultaneous production of cement or hydraulic lime

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748873C (en) * 1940-05-21 1944-11-18 Process for extracting or refining metal in a rotary kiln with the simultaneous production of cement or hydraulic lime

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