[go: up one dir, main page]

DE856573C - Process for the production of dolomite stones - Google Patents

Process for the production of dolomite stones

Info

Publication number
DE856573C
DE856573C DED3841D DED0003841D DE856573C DE 856573 C DE856573 C DE 856573C DE D3841 D DED3841 D DE D3841D DE D0003841 D DED0003841 D DE D0003841D DE 856573 C DE856573 C DE 856573C
Authority
DE
Germany
Prior art keywords
dolomite
production
stones
hydrate
sintered
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
DED3841D
Other languages
German (de)
Inventor
Kamillo Dr-Ing Konopicky
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.)
Dolomitwerke GmbH
Original Assignee
Dolomitwerke 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 Dolomitwerke GmbH filed Critical Dolomitwerke GmbH
Priority to DED3841D priority Critical patent/DE856573C/en
Application granted granted Critical
Publication of DE856573C publication Critical patent/DE856573C/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
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/14—Colouring matters
    • 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
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/04—Clay; Kaolin
    • 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
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • 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
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/604—Pressing at temperatures other than sintering temperatures

Landscapes

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

Description

Verfahren zur Herstellung von Dolomitsteinen Es ist bekannt, zerkleinerten Sinterdolomit mit einem Zusatz von Sintermitteln trocken, d. h. ohne Zusatz von Feuchtigkeit bzw. in Abwesenheit jeglicher Feuchtigkeit, zu verpressen und die Preßlinge tunlichst rasch auf Temperaturen über die Bildungstemperatur der Hydrate zu erhitzen. So gelingt es, Dolomitsteine ausgezeichneter Eigenschaften zu erhalten.Process for the production of dolomite stones It is known, crushed Sintered dolomite with an addition of sintering agents dry, d. H. without the addition of Moisture or in the absence of any moisture, to press and the compacts as quickly as possible to heat them to temperatures above the formation temperature of the hydrates. In this way it is possible to obtain dolomite stones with excellent properties.

Ein Nachteil dieses Verfahrens besteht darin, daß der Preßling wenig kantenfest ist, da der Feinstanteil in seiner Menge beschränkt bleiben muß, um allfällige Hydratationen tunlichst zu vermeiden.A disadvantage of this method is that the compact is little is edge-proof, since the fine fraction must remain limited in its amount to avoid any Avoid hydration whenever possible.

Es wurde nun gefunden, daß man die Verdichtung beim Verpressen und die Festigkeit des verpreßten Formlings mit Vorteil durch Zusatz von Dolomithydrat (Mg0 - Ca(OH)Q), Talkum usw. verbessern kann. Diese Zusätze sind dadurch charakterisiert, daß sie einerseits den Preßvorgang erleichtern und andererseits durch eine erst bei höherer Temperatur erfolgende Wasserabgabe nicht zur Hydratation des Sinterdolomits führen. Da das Dolomithydrat kein Fremdstoff ist, kann es im Gegensatz zu den anderen Flußmitteln in wesentlich höherem Maße zugesetzt werden und ermöglicht dadurch die Einstellung auf dichteste Kornpackung.It has now been found that you can compress the compression and the strength of the pressed molding with the advantage of adding dolomite hydrate (Mg0 - Ca (OH) Q), talc, etc. can improve. These additives are characterized by that on the one hand they facilitate the pressing process and on the other hand through a first The release of water at a higher temperature does not lead to the hydration of the sintered dolomite to lead. Since the dolomite hydrate is not a foreign substance, it can, in contrast to the others Fluxes are added to a much larger extent and thereby enables the Adjustment to the closest grain packing.

Die "Zusatzmittel sollen der Sinterdolomitmasse in feinster Verteilung zugesetzt werden; ihre Menge beträgt zumeist i bis 2%, bei Dolomithydrat io% und darüber.The "additives should be finely divided into the sintered dolomite mass be added; their amount is mostly 1 to 2%, with dolomite hydrate io% and above.

Zusätze von Talkum u. dgl. zu Dolomitmassen wurden wohl schon mehrfach vorgeschlagen, zumeist zu dem Zweck, die Sinterung des Dolomits zu erleichtern oder die Brenntemperatur der Steine herabzusetzen. Die Auswahl der Zusatzmittel für das Trockenverpressen von Sinterdolomit ist aber das Kennzeichen der vorliegenden Anmeldung.Additions of talc and the like to dolomite masses have probably already been made several times suggested, mostly for the purpose of facilitating the sintering of the dolomite or reduce the firing temperature of the stones. The choice of additives for the However, dry pressing of sintered dolomite is the characteristic of the present application.

Claims (1)

PATENTANSPRUCH: Verfahren zum Herstellen von Sinterdolomitsteinen durch Trockenpressen, dadurch gekennzeichnet, daB als Zusatz geringe Mengen bildsamer Stoffe, z. B. Talkum oder Dolomithydrat verwendet werden, deren Entwässerungstemperatur über der Bildungstemperatur des Dolomithydfates liegt. PATENT CLAIM: Process for the production of sintered dolomite stones by dry pressing, characterized in that small amounts of malleable substances, e.g. B. talc or dolomite hydrate can be used, the dewatering temperature of which is above the formation temperature of the dolomite hydrate.
DED3841D 1944-10-26 1944-10-26 Process for the production of dolomite stones Expired DE856573C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED3841D DE856573C (en) 1944-10-26 1944-10-26 Process for the production of dolomite stones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED3841D DE856573C (en) 1944-10-26 1944-10-26 Process for the production of dolomite stones

Publications (1)

Publication Number Publication Date
DE856573C true DE856573C (en) 1952-11-24

Family

ID=7030720

Family Applications (1)

Application Number Title Priority Date Filing Date
DED3841D Expired DE856573C (en) 1944-10-26 1944-10-26 Process for the production of dolomite stones

Country Status (1)

Country Link
DE (1) DE856573C (en)

Similar Documents

Publication Publication Date Title
DE856573C (en) Process for the production of dolomite stones
DE875868C (en) Metal moldings
DE1767315A1 (en) Fluorine-containing silica granules with a large pore volume
DE900929C (en) Process for briquetting hard coal
DE465353C (en) Process for the production of mass cores, in particular from permalloy powder, the insulating means of which consists of heat-resistant material and which are subjected to heating before their completion
DE480090C (en) Process for the direct production of utensils from casein, blood, horn meal and other protein and keratin substances
AT207506B (en) Process for the production of setting binders
AT145606B (en) Non-conductive support body for the electrodes of electrical discharge vessels.
DE1471433C3 (en) Process for the production of pressed, in particular extruded, ceramic materials
AT220655B (en) Ramp wedge, especially for a bridge that can be dismantled
AT211481B (en) Process for the production of powder bases
DE604226C (en) Process for the production of cadmium sulfide paints
AT230260B (en) Vitreous body and process for its manufacture
AT134710B (en) Method and device for the production of seamless tubes or other molded articles from fiber material.
AT368686B (en) METHOD FOR PRODUCING TONIC TOBACCO SMOKING FILTERS OR -FILTER PARTS
DE805616C (en) Process for the production of balls from ceramic mass
AT123505B (en) Method of firing bricks of high strength.
DE734895C (en) Method for the production of a sleeve for compressed yeast pieces
DE739065C (en) Process for the treatment of dried briquetting brown coal
DE904182C (en) Process for the production of piston rings from sintered iron powder containing graphite
DE546273C (en) Process for the production of heat-insulating moldings
DE866326C (en) Process for the manufacture of products from sintered clay
AT296133B (en) Process for the production of sintered magnesia
AT111039B (en) Process for the production of heat protection compounds.
DE845625C (en) Process for the production of volumetric magnesite bricks