DE595347C - Process for the production of Portland cement from ferrous raw materials with simultaneous extraction of iron - Google Patents

Process for the production of Portland cement from ferrous raw materials with simultaneous extraction of iron

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Publication number
DE595347C
DE595347C DEM124410D DEM0124410D DE595347C DE 595347 C DE595347 C DE 595347C DE M124410 D DEM124410 D DE M124410D DE M0124410 D DEM0124410 D DE M0124410D DE 595347 C DE595347 C DE 595347C
Authority
DE
Germany
Prior art keywords
iron
portland cement
raw materials
production
clinker
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
DEM124410D
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.)
IND AG
Miag Muehlenbau und Industrie GmbH
Original Assignee
IND AG
Miag Muehlenbau und Industrie GmbH
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 IND AG, Miag Muehlenbau und Industrie GmbH filed Critical IND AG
Priority to DEM124410D priority Critical patent/DE595347C/en
Application granted granted Critical
Publication of DE595347C publication Critical patent/DE595347C/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
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • 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
    • C04B7/02—Portland cement

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

.Verfahren zur Herstellung von Portlandzement aus eisenhaltigen Rohstoffen unter gleichzeitiger Gewinnung von Eisen In dem Hauptpatent 531 416 ist ein Verfahren zur Herstellung von weißem Zement aus eisenhaltigen Rohstoffen beschrieben, nach welchem die Rohstoffe unter Anwendung geeigneter Reduktionsmittel zunächst einem reduzierenden Brand unterworfen werden. Der erkaltete und noch heiße Klinker wird sodann zerkleinert und das gebildete metallische Eisen durch magnetische Scheidung entfernt. Das auf diese Weise vom Eisen vollständig befreite Rohgut soll dann zwecks- Gewinnung eines weißen Zemente einem oxydierenden Brand unterworfen werden..A process for the production of Portland cement, of iron-containing raw materials with simultaneous production of iron in the main patent 531 416 discloses a process for the production of white cement, of iron-containing raw materials described, according to which the raw materials initially subjected to application of appropriate reducing agent, a reducing fire. The cold and still hot clinker is then crushed and the metallic iron that has formed is removed by magnetic separation. The raw material, completely freed of iron in this way, is then to be subjected to an oxidizing fire for the purpose of obtaining a white cement.

Es wurde nun gefunden, daß mit Hilfe der in dem Hauptpatent beschriebenen Arbeitsweise auch ein normaler grauer Portlandzement gewonnen werden kann, wenn bei der Absonderung des Eisens von dem Klinker der verbleibende Eisengehalt auf den eines normalen grauen Portlandzementes abgestimmt wird. Mit besonderem Vorteil läßt sich dieses Verfahren bei der Verarbeitung von hocheisenhaltigen Rohstoffen anwenden, wobei neben dem wertvollen hydraulischen Bindemittel gleichzeitig auch metallisches Eisen gewonnen wird.It has now been found that with the help of those described in the main patent Normal gray portland cement can also be obtained, if when the iron is separated from the clinker, the remaining iron content is found that of normal gray Portland cement. With a particular advantage This process can be used when processing raw materials with a high iron content apply, in addition to the valuable hydraulic binder at the same time metallic iron is obtained.

Nach der vorliegenden Erfindung kann nun " in der Weise vorgegangen werden, daß das Ausgaligsinateral gegebenenfalls durch Zugabe von geeigneten Zuschlägen in einer derartigen Zusammensetzung zur Anwendung gelangt, daß der im Verfahrensverlauf erhaltene Klinker die Zusammensetzung eines normalen grauen Portlandzementklinkers aufweist. In der ersten Verfahrensstufe wird das Material unter Anwendung geeigneter Reduktionsmittel so gebrannt, daß das Eisenoxyd zu metallischem Eisen reduziert wird. Nach Zerkleinerung des erhaltenen gebrannten Gutes wird das gebildete Eisen von den Bleistoffen mit Hilfe eines Magneten so weit abgetrennt, daß die verbleibende Eisenmenge dem Eisengehalt des normalen grauen Portlandzementes mit etwa 3,5 °/o Eisengehalt entspricht. Da das Eisen dem Klinker anhaftet, ist z. B. der Zerkleinerungsgrad des Klinkers ein Mittel zur Einstellung des im Klinker verbleibenden Eisengehaltes. Das in der Zusammensetzung einem normalen grauen Portlandzement entsprechende Material wird nunmehr in geeigneten Vorrichtungen, beispielsweise in einem Drehofen oder Schachtofen, einem oxydierenden Brennprozeß unterworfen. Die Beheizung dieser Ofen erfolgt in wirtschaftlicher Weise durch die aus dem reduzierenden Brand stammenden Abgase, die noch wesentliche Mengen an brennbaren Bestandteilen enthalten.According to the present invention can now "proceed in the manner that the Ausgaligsinateral, if necessary, by adding suitable additives is used in such a composition that in the course of the process clinker obtained the composition of a normal gray Portland cement clinker having. In the first stage of the process, the material becomes more suitable using Reducing agent burned in such a way that the iron oxide is reduced to metallic iron will. After crushing the resulting fired material, the formed iron becomes separated from the lead materials with the help of a magnet so far that the remaining The amount of iron corresponds to the iron content of normal gray Portland cement with about 3.5 per cent Iron content. Since the iron adheres to the clinker, z. B. the degree of comminution of the clinker is a means of adjusting the iron content remaining in the clinker. The material corresponding in composition to normal gray Portland cement is now in suitable devices, for example in a rotary kiln or Shaft furnace, subjected to an oxidizing firing process. The heating of this furnace is carried out in an economical way through the originating from the reducing fire Exhaust gases that still contain significant amounts of flammable components.

Auf die vorstehend beschriebene Art läßt sich auch die Verhüttung von Eisenerzen unter gleichzeitiger Gewinnung von hochwertigem Portlandzement in technisch einfacher und wirtschaftlicher Weise durchführen.In the manner described above, can himself too the smelting of iron ore while at the same time producing high-quality Portland cement perform in a technically simple and economical manner.

Claims (1)

PATENTANSPRÜCHE: r. Verfahren zur Herstellung von Portlandzement aus eisenhaltigen Rohstoffen unter gleichzeitiger Gewinnung von Eisen nach Patent 531416, dadurch gekennzeichnet, daß bei der Absonderung de:3 Eisens von dem Klinker der verbleibende restliche Eisengehalt auf den eines normalen grauen Portlandzernentes abgestimmt und der Klinker sodann noch oxydierend gebrannt wird. a. Verfahren nach Anspruch z, dadurch gekennzeichnet, daß die Beheizung der Oxpdationsv orrichtungen mit Hilfe der bei dem reduzierenden Brand entstehenden brennbaren Abgase erfolgt.PATENT CLAIMS: r. Method of manufacturing Portland cement ferrous raw materials with simultaneous extraction of iron according to patent 531416, characterized in that when de: 3 iron is separated from the clinker the remaining iron content to that of a normal gray portland company matched and the clinker is then burned in an oxidizing manner. a. Procedure according to Claim z, characterized in that the heating of the Oxpdationsv devices takes place with the help of the flammable exhaust gases produced by the reducing fire.
DEM124410D 1933-07-14 1933-07-14 Process for the production of Portland cement from ferrous raw materials with simultaneous extraction of iron Expired DE595347C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM124410D DE595347C (en) 1933-07-14 1933-07-14 Process for the production of Portland cement from ferrous raw materials with simultaneous extraction of iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM124410D DE595347C (en) 1933-07-14 1933-07-14 Process for the production of Portland cement from ferrous raw materials with simultaneous extraction of iron

Publications (1)

Publication Number Publication Date
DE595347C true DE595347C (en) 1934-04-11

Family

ID=7330516

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM124410D Expired DE595347C (en) 1933-07-14 1933-07-14 Process for the production of Portland cement from ferrous raw materials with simultaneous extraction of iron

Country Status (1)

Country Link
DE (1) DE595347C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974876C (en) * 1953-05-21 1961-05-18 Rheinische Kalksteinwerke Method and device for the production of cement in a rotary kiln

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974876C (en) * 1953-05-21 1961-05-18 Rheinische Kalksteinwerke Method and device for the production of cement in a rotary kiln

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