CH148049A - Process for the production of white cement from colored, iron-containing raw materials. - Google Patents

Process for the production of white cement from colored, iron-containing raw materials.

Info

Publication number
CH148049A
CH148049A CH148049DA CH148049A CH 148049 A CH148049 A CH 148049A CH 148049D A CH148049D A CH 148049DA CH 148049 A CH148049 A CH 148049A
Authority
CH
Switzerland
Prior art keywords
raw materials
iron
production
colored
white cement
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft M Industrie
Original Assignee
Miag Muehlenbau & Ind Ag
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 Miag Muehlenbau & Ind Ag filed Critical Miag Muehlenbau & Ind Ag
Publication of CH148049A publication Critical patent/CH148049A/en

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  • Manufacture And Refinement Of Metals (AREA)

Description

  

  Verfahren zur Herstellung von weissem Zement aus gefärbten, eisenhaltigen Rohstoffen.    Die Erfindung stellt ein Verfahren zur  Herstellung von weissem Zement dar, das dem  Bekannten gegenüber den Vorteil aufweist,  dass es sich ohne weiteres auf alle Rohstoffe  anwenden lässt, deren Gehalt an Eisen gross  oder klein ist.  



  Das neue Verfahren ist dadurch gekenn  zeichnet, dass man die gefärbten, eisenhaltigen  Rohstoffe, aus denen ein weisser Zement er  brannt werden soll, gegebenenfalls unter Bei  fügung von Koks oder andern Reduktions  mitteln, reduzierend brennt, die entstandenen  Klinker zerkleinert, das metallische Eisen  entfernt und hiernach die zerkleinerten Klinker  mit einem Oxydationsmittel behandelt.  



  Beispielsweise werden die üblichen     Zement-          rohstoffe        im        Gemisch        mit    6     %        Koks        im        Dreh-          ofen    gesintert odergeschmolzen.     Bai    Erreichung  einer Temperatur von 700-900 0 C werden  die Eisenoxyde in der entstehenden Kohlen  oxydatmosphäre zu Metall reduziert, das in  Form feiner Flitter oder Kügelchen in dem  erhaltenen Klinker verbleibt.

   Nach der Zer  kleinerung der Klinker werden die Metallteile    mit Hilfe eines     Magneten    herausgelesen und  dann die     gepulverte        Xlinkermasse    etwa eine  halbe Stunde auf etwa 500 0 C unter Luft  zutritt erhitzt. Dabei verbrennt der etwa  vorhandene überschüssige Koks, und das durch  die Schwefelbeimengungen des     Brennstoffes     entstandene     Schwefelcalcirrm    wird in un  schädlichen Gips übergeführt. Den Zement  rohstoffen kann man natürlich auch noch       Flussmittel    zur Herabsetzung der     Sintertenr-          peratur    hinzusetzen.



  Process for the production of white cement from colored, iron-containing raw materials. The invention represents a method for the production of white cement, which has the advantage over the known that it can be easily applied to all raw materials whose iron content is high or low.



  The new process is characterized in that the colored, iron-containing raw materials from which a white cement is to be burned is burned, if necessary with the addition of coke or other reducing agents, the clinker formed is crushed, the metallic iron is removed and then the crushed clinker is treated with an oxidizing agent.



  For example, the usual cement raw materials mixed with 6% coke are sintered or melted in a rotary kiln. When a temperature of 700-900 ° C. is reached, the iron oxides are reduced to metal in the resulting carbon dioxide atmosphere, which remains in the clinker obtained in the form of fine flakes or beads.

   After the clinker has been crushed, the metal parts are read out with the aid of a magnet and the powdered Xlinker mass is then heated for about half an hour to about 500 ° C. under the influence of air. Any excess coke that may be present burns, and the sulfur calcium produced by the sulfur admixtures in the fuel is converted into un harmful gypsum. Of course, flux can also be added to the cement raw materials to reduce the sintering temperature.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von weissem Zement durch Brennen von gefärbten, eisen haltigen Rohstoffen, dadurch gekennzeichnet, dass man die Rohstoffe reduzierend brennt, die entstandenen Klinker zerkleinert, das metal lische Eisen entfernt und hiernach die zer kleinerten Klinker mit einem Oxydations mittel behandelt. PATENT CLAIM: Process for the production of white cement by burning colored, iron-containing raw materials, characterized in that the raw materials are burned in a reducing manner, the clinker formed is crushed, the metallic iron is removed and the crushed clinker is then treated with an oxidizing agent.
CH148049D 1929-09-25 1930-05-08 Process for the production of white cement from colored, iron-containing raw materials. CH148049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE148049X 1929-09-25

Publications (1)

Publication Number Publication Date
CH148049A true CH148049A (en) 1931-07-15

Family

ID=5672399

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148049D CH148049A (en) 1929-09-25 1930-05-08 Process for the production of white cement from colored, iron-containing raw materials.

Country Status (1)

Country Link
CH (1) CH148049A (en)

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