DE641541C - Process for the production of colorless (white) cements - Google Patents

Process for the production of colorless (white) cements

Info

Publication number
DE641541C
DE641541C DES109317D DES0109317D DE641541C DE 641541 C DE641541 C DE 641541C DE S109317 D DES109317 D DE S109317D DE S0109317 D DES0109317 D DE S0109317D DE 641541 C DE641541 C DE 641541C
Authority
DE
Germany
Prior art keywords
white
colorless
cements
production
calcium chloride
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
DES109317D
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.)
CIMENTS FRANCAIS ET DES PORTLA
Original Assignee
CIMENTS FRANCAIS ET DES PORTLA
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 CIMENTS FRANCAIS ET DES PORTLA filed Critical CIMENTS FRANCAIS ET DES PORTLA
Application granted granted Critical
Publication of DE641541C publication Critical patent/DE641541C/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
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C04B7/42—Active ingredients added before, or during, the burning process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Verfahren zur Herstellung von farblosen (weißen) Zementen In dem Hauptpatent ist ein Verfahren zur Herstellung von farblosen (weißen) Zementen beschrieben, und zwar soll nach dem in jener Patentschrift offenbarten Vorschlag der Klinker unmittelbar aus der heißesten Zone der Brennvorrichtung in eine Kühlvorrichtung übergeführt werden, in welcher das gebrannte Gut unter Anwendung besonderer Kühlmittel und unter der Fernhaltung von Luft oder anderen Gasen mit größerem Sauerstoffgehalt eine rasche Abkühlung erfährt. Es wurde nun festgestellt, daß die nachteiligen Folgen, die sich aus den nicht ganz vermeidlichen betrieblichen Unregelmäßigkeiten bei diesem Verfahren bezüglich der Färbung des Produktes noch ergeben können, weitestgehend durch Zusatz von Flußspat oder Chlorcalcium oder durch Zusatz eines Gemisches beider Stoffe hintangehalten werden können. Die Erfindung wird praktisch so ausgeführt, daß den Ausgangsstoffen die genannten Zuschläge in einer Menge von 2 bis 6 °/o vor dem Brennprozeß zugegeben werden. Die Anwendung von Flußspat und Chlorcalcium als Sintermittel ist bereits bekannt. Desgleichen ist auch bereits vorgeschlagen, zwecks Herstellung von weißem Zement eisenhaltigen Rohmaterialien Chlorcalcium zuzusetzen und sodann auf die hocherhitzte Masse Wasserdampf einwirken zu lassen, um die Eisenoxyde in flüchtige Chlorürverbindungen überzuführen.Process for the production of colorless (white) cements In the main patent describes a process for the production of colorless (white) cements, and according to the proposal disclosed in that patent specification, the clinker should be used directly transferred from the hottest zone of the burning device to a cooling device be in which the fired material using special coolants and under Keeping away air or other gases with a higher oxygen content a quick one Experience cooling. It has now been found that the adverse consequences that arise from the not entirely avoidable operational irregularities in this process with regard to the color of the product can still result, as far as possible through addition with fluorspar or calcium chloride or by adding a mixture of both substances can be. The invention is practically carried out so that the starting materials the said surcharges were added in an amount of 2 to 6 ° / o before the firing process will. The use of fluorspar and calcium chloride as sintering agents is already in place known. The same has also already been proposed for the purpose of producing white Cement ferrous raw materials to add calcium chloride and then to the highly heated Mass water vapor to act to convert the iron oxides into volatile chlorine compounds convict.

Mit dieser Maßnahme allein gelingt es tatsächlich nicht, farblose (weiße) Zemente zu erhalten, sondern der gewünschte Erfolg tritt erst ein beim Zusammenwirken aller der im vorstehenden offenbarten Maßnahmen.With this measure alone it is actually not possible to achieve colorless ones (white) cements, but the desired success only occurs when they work together all of the measures disclosed above.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von farblosen (weißen) Zementen nach Patent 641 r22, nach welchem der Klinker unmittelbar aus der heißesten Zone der Brennvorrichtung in seine Kühlvorrichtung übergeführt wird unter Fernhaltung von sauerstoffhaltigen Gasen, dadurch gekennzeichnet, daß den Ausgangsstoffen Flußspat oder Chlörcalcium oder- ein Gemisch dieser beiden Stoffe zugesetzt wird. PATENT CLAIM: Process for the production of colorless (white) cements according to patent 641 r22, according to which the clinker is transferred directly from the hottest zone of the furnace into its cooling device while keeping away oxygen-containing gases, characterized in that the starting materials fluorspar or calcium chloride or a Mixture of these two substances is added.
DES109317D 1933-04-26 1933-05-12 Process for the production of colorless (white) cements Expired DE641541C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR641541X 1933-04-26

Publications (1)

Publication Number Publication Date
DE641541C true DE641541C (en) 1937-02-04

Family

ID=8998215

Family Applications (1)

Application Number Title Priority Date Filing Date
DES109317D Expired DE641541C (en) 1933-04-26 1933-05-12 Process for the production of colorless (white) cements

Country Status (1)

Country Link
DE (1) DE641541C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025316B (en) * 1954-06-17 1958-02-27 Dyckerhoff Portland Zementwerk Process for the production of a white Portland cement clinker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025316B (en) * 1954-06-17 1958-02-27 Dyckerhoff Portland Zementwerk Process for the production of a white Portland cement clinker

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