DE600576C - Process for the production of colored Portland cement clinkers from raw materials that are low in magnesia - Google Patents

Process for the production of colored Portland cement clinkers from raw materials that are low in magnesia

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Publication number
DE600576C
DE600576C DES110071D DES0110071D DE600576C DE 600576 C DE600576 C DE 600576C DE S110071 D DES110071 D DE S110071D DE S0110071 D DES0110071 D DE S0110071D DE 600576 C DE600576 C DE 600576C
Authority
DE
Germany
Prior art keywords
magnesia
raw materials
portland cement
production
low
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
DES110071D
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 DE600576C publication Critical patent/DE600576C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/02Portland cement

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

Verfahren zur Herstellung von gefärbten Portlandzementklinkern aus magnesiaarmen Rohstoffen Es ist bekannt, daß einige Fabriken Portlandzement von erwünschter dunkler Färbung erzeugen, daß @es anderen dagegen, die nach demselben. Verfahren arbeiten, nur gelingt, helle mißfarbige Erzeugnisse herzustellen. Versuche, die helle Färbung durch Zusatz von sehr dunklen Mineralfarben zu verbessern oder dem rohen Gemisch vor dem Brennen farbgebende Metallsalze oder Oxyde, insbesondere Eisenoxyde, hinzuzufügen, schlugen fehl, obwohl im allgemeinen die Farbe der Portlandzementklinker von der Beschaffenheit und der Menge der in dem Rohstoff enthaltenen Metalloxyde oder -salze abhängt.Process for the production of colored Portland cement clinker Low Magnesia Raw Materials It is known that some factories produce Portland cement more desirable darker coloring, that @es other against, those after the same. Processes work, only light discolored products can be produced. Try, to improve the light coloring by adding very dark mineral colors or Coloring metal salts or oxides, in particular, of the raw mixture before firing Iron oxides failed to add, although generally the color of portland cement clinkers on the nature and quantity of the metal oxides contained in the raw material or salts.

Der Erfinder hat :als erster festgestellt, daß zwei Klinkersorten, hergestellt aus zwei Rohstoffen, die dieselben Metalloxyde oder -salze, und zwar in demselben Mengenverhältnis enthalten, nicht von ein und derselben Färbung sind, wenn die beiden Rohstoffe sich in bezug auf den Magnesiagehalt erheblich voneinander unterscheiden. So ist z. B. die Färbung des Portlandzementes aus einem Klinker, hergestellt von einem Rohstoff mit weniger als o,8 % Magnesiagehalt,erheblich heller als diejenige des Zementes von einem Rohstoff mit z. B. 1,2 oio Magnesia, selbst wenn die beiden Rohstoffe genau denselben Prozentsatz an Metalloxyden oder -salzen aufweisen. Diese Färbung ist übrigens nicht nur heller, sondern auch in ihrem Farbton unterschiedlich.The inventor: was the first to discover that two types of clinker, made from two raw materials that have the same metal oxides or salts, namely are contained in the same proportions, are not of one and the same color, if the two raw materials differ considerably in terms of their magnesia content differentiate. So is z. B. the color of Portland cement from a clinker, made from a raw material with less than 0.8% magnesia, considerably lighter than that of the cement from a raw material with e.g. B. 1,2 oio magnesia, itself when the two raw materials have exactly the same percentage of metal oxides or salts exhibit. By the way, this coloring is not only lighter, but also in its hue different.

Der Erfinder hat ferner erfindungsgemäß festgestellt, da.ß man die Färbung der Portlandzementklinker, die weniger als o; 8 % Magnesia enthalten, erheblich verdunkeln kann, wenn man dem Rohstoff, falls derselbe magnesiaarm ist, so viel Magnesia oder magnesiahaltige Stoffe, wie Dolomit, hinzusetzt, da ß der fertige Klinker o,8 bis z % Mg0-Gehalt besitzt, welcher den in dem Rohstoffgemisch enthaltenen oder nötigenfalls planmäßig zu vermehrenden Metalloxyden oder Metallsalzen die Entfaltung ihrer färbenden Eigenschaften ermöglicht. Diese Feststellung ist um so überraschender, als @es anderseits bekannt ist, daß, die Anwesenheit von erheblichen Magnesiamengen im Verhältnis zu Metalloxyden ein Hindernis bei der Fabrikation darstellt.The inventor has also found according to the invention that the Staining of portland cement clinker less than o; Contains 8% magnesia, significantly can darken if you add so much to the raw material, if it is low in magnesia Magnesia or substances containing magnesia, such as dolomite, are added to make the finished product Clinker has 0.8 to z% Mg0 content, which is contained in the raw material mixture or, if necessary, metal oxides or metal salts to be increased according to plan, the development their coloring properties. This finding is all the more surprising as @it is known, on the other hand, to be the presence of substantial amounts of magnesia in relation to metal oxides represents an obstacle in manufacture.

Zur Ausführung des Verfahrens fügt man dem pulver- oder teigförmigen Rohgemisch eine bestimmte Menge von magnesiahaltigen Mineralien, z. B. Dolomit (Magnesiumcaiciumcarbonat)"hitnux, derart,- däß man einen Klinker, enthaltend o,8. bis z % Magnesia, @erzeugen kann. Eine Vorbedingung für das Gelingen ist jedoch die Gegenwart von Metalloxyden oder -salzen, deren Menge zur Färbung der Klinker genügt, welche in Abwesenheit der Magnesia nicht auftreten würde. Es ist festgestellt worden, daß die färbende Wirkung, welche bereits bei einem Magnesiagehalt von o;8 % nennenswert ist, bei einem solchen von r % voll entfaltet ist, jedoch bei :einem Gehalt über z % Magnesia unregelmäßig wird.To carry out the process, one adds the powder or dough Raw mixture containing a certain amount of magnesia Minerals, z. B. dolomite (magnesium calcium carbonate) "hitnux, such, - that one clinker, containing o, 8. up to z% Magnesia, @ can generate. A prerequisite for success however, the presence of metal oxides or salts, their amount to color the clinker is sufficient, which would not occur in the absence of the magnesia. It it has been found that the coloring effect, which is already at a magnesia content of o; 8% is noteworthy, in such of r% it is fully developed, however at: a content above z% magnesia becomes irregular.

Die Herstellung von gefärbten Zementklinkern, welche schon von Natur in ihren Rohstoffen die entsprechenden Mengen der beiden durch Reaktion miteinander färbend wirkenden Agenzien gleichzeitig enthalten, fällt nicht unter den Gegenstand der Erfindung.The production of colored cement clinker, which is already natural in their raw materials the corresponding quantities of the two by reaction with one another Containing coloring agents at the same time does not come under the subject the invention.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von gefärbten Portlandzementklinkern aus magnesiaarmen Rohstoffen, dadurch gekennzeichnet, daß solchen Rohstoffen so viel von mägnesiahältigen Stoffen, wie z. B. Dolomit, hinzugefügt wird, daß der fertige Klinker einen Magnesiagehalt von o,8 bis 2,o % Mg 0 aufweist, welcher den in dem Rohstoffgemisch .enthaltenen oder nötigenfalls planmäßig zu vermehrenden Metalloxyden oder Metallsalzen die Entfaltung ihrer färbenden Eigenschaften ermöglicht.PATENT CLAIM: A process for the production of colored Portland cement clinker from low-magnesia raw materials, characterized in that such raw materials contain so much of magnesia-containing substances, such as, for. B. dolomite is added so that the finished clinker has a magnesia content of 0.8 to 2.0% Mg 0 , which enables the metal oxides or metal salts contained in the raw material mixture or, if necessary, to be increased according to plan, to develop their coloring properties.
DES110071D 1932-07-08 1933-07-08 Process for the production of colored Portland cement clinkers from raw materials that are low in magnesia Expired DE600576C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR600576X 1932-07-08

Publications (1)

Publication Number Publication Date
DE600576C true DE600576C (en) 1934-07-26

Family

ID=8970324

Family Applications (1)

Application Number Title Priority Date Filing Date
DES110071D Expired DE600576C (en) 1932-07-08 1933-07-08 Process for the production of colored Portland cement clinkers from raw materials that are low in magnesia

Country Status (1)

Country Link
DE (1) DE600576C (en)

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