DE1271679B - Process for the production of porous granules - Google Patents
Process for the production of porous granulesInfo
- Publication number
- DE1271679B DE1271679B DEP1271A DE1271679A DE1271679B DE 1271679 B DE1271679 B DE 1271679B DE P1271 A DEP1271 A DE P1271A DE 1271679 A DE1271679 A DE 1271679A DE 1271679 B DE1271679 B DE 1271679B
- Authority
- DE
- Germany
- Prior art keywords
- production
- granules
- mixture
- ashed
- porous
- 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.)
- Pending
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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/28—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using special binding agents
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
Verfahren zur Herstellung von porösen Granalien Die vorliegende Erfindung bezieht sich auf Verfahren zur Herstellung von porösen Granalien.Method of making porous granules The present invention relates to methods of making porous granules.
Es sind bereits verschiedene Verfahren zur Herstellung von porösen Granalien bekannt. So können beispielsweise die Granalien durch Zerteilen der zu ihrer Herstellung verwendeten Massen in flüssiger oder fester Phase hergestellt werden, wobei die erforderliche hohe Porosität in einer vor-, ein- oder nachgeschalteten Verfahrensstufe hervorgerufen werden kann. So werden z. B. hochwertige keramische Materialien in Hohlkugelform aus einer Schmelze verblasen (Kugelkorund, Kugelmullit) oder natürliche und künstliche poröse Materialien werden zerkleinert und klassiert (Bims, Leichtschamotte) oder es wird schließlich ein natürliches Material zerkleinert und anschließend durch thermische Behandlung infolge materialbedingter Eigenschaften gebläht (Blähschiefer). There are already various methods of making porous Granules known. For example, the granules by dividing the to The masses used in their manufacture are produced in the liquid or solid phase be, with the required high porosity in an upstream, on or downstream Process stage can be caused. So z. B. high quality ceramic Blowing materials in hollow spherical form from a melt (spherical corundum, spherical mullite) or natural and artificial porous materials are crushed and classified (Pumice, light chamotte) or finally a natural material is crushed and then by thermal treatment due to material-related properties distended (expanded slate).
Granalien können weiter durch Kornvergrößerung von Pulvern oder feinkörnigen Materialien durch Preß- oder Aufbaugranulation gewonnen werden. Granules can be further made by enlarging the grain of powders or fine-grained ones Materials are obtained by pressing or build-up granulation.
Die Aufbaugranulation wird dabei mit Chargenmischern, Granuliertrommeln, Granuliertellern od. dgl., die Preßgranulation mittels Strangpressen oder Preßwalzen durchgeführt.The build-up granulation is done with batch mixers, granulating drums, Granulating plates or the like, the press granulation by means of extrusion or press rolls carried out.
Die erforderliche mechanische Festigkeit wird bei diesen bekannten Verfahren durch einen anschließenden keramischen Brand erzielt. Bei Blähton od. dgl. wird gleichzeitig durch die darin vorhandenen Ausbrennstoffe oder blähende Stoffe die erforderliche hohe Porosität erzeugt. The required mechanical strength is known in these Process achieved by a subsequent ceramic firing. With expanded clay or. Like. Is at the same time by the existing therein burnout substances or bloating Substances generated the required high porosity.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von porösen Granalien anzugeben, mit dem sich ohne einen Brennvorgang feinporige Granalien und Granulate mit hoher mechanischer Festigkeit und leichtem Gewicht erzeugen lassen. The invention is based on the object of a method for production of porous granules, with which fine-pored ones can be produced without a firing process Produce granules and granules with high mechanical strength and light weight permit.
Das beanspruchte Verfahren zur Herstellung von porösen Formlingen durch Mischen von Al203- und SiO2-haltigen, feuerfesten mineralischen Stoffen, veraschte Getreideschalen und Wasser, anschließendes Verformen und Trocknen der Mischung besteht darin, daß zur Herstellung von porösen Granalien hoher Festigkeit eine Masse aus 20 bis 95, vorzugsweise 40 bis 950/, veraschten Getreideschalen, insbesondere Reisschalen, 0 bis 15, vorzugsweise 5 bis 12 01o Ton und 5 bis 80, insbesondere 20 bis 4001, kieselsäurereichen, feuerfesten Zuschlagstoffen mit Phosphorsäure oder sauren Salzen derselben versetzt, die Mischung anschließend in bekannter Weise granuliert und bei etwa 200° in üblicher Weise getrocknet wird. The claimed method for producing porous moldings by mixing refractory mineral materials containing Al203 and SiO2, incinerated The mixture consists of grain husks and water, then shaping and drying in that for the production of porous granules of high strength a mass of 20 to 95, preferably 40 to 950 /, ashed grain hulls, especially rice hulls, 0 to 15, preferably 5 to 12 01o tone and 5 to 80, especially 20 to 4001, Silica-rich, refractory aggregates with phosphoric acid or acid salts the same is added, the mixture is then granulated in a known manner and is dried at about 200 ° in the usual way.
Mit diesem Verfahren lassen sich wegen der Mikro- porosität der Reisschalenasche feinste Granulate herstellen, ohne daß eine wesentliche Zunahme des Raumgewichtes eintritt. Das erfindungsgemäß hergestellte Granulat weist bereits nach dem Trocknen bei erhöhter Temperatur so hohe mechanische Festigkeit auf, daß ein Brand vollkommen entbehrlich ist. Die Verwendung von Phosphorsäure oder phosphorsauren Salzen als Bindemittel ergibt nach dem Trocknen eine nahezu bis zur Sinterung gleichmäßige Festigkeit. Due to the micro- porosity of rice husk ash Produce the finest granules without a significant increase in density entry. The granules produced according to the invention already show after drying Mechanical strength at elevated temperature is so high that a fire is complete is dispensable. The use of phosphoric acid or phosphoric acid salts as After drying, the binding agent is almost uniform until sintering Strength.
Es ist zwar bereits bekannt, Bauelemente, wie Ziegel und Platten, durch Mischen von veraschten Getreideschalen mit Al203- und SiO2-haltigen, feuerfesten, mineralischen Stoffen sowie Wasser und anschließendes Verformen und Trocknen der Mischung herzustellen. Ferner ist es bekannt, isolierende Formkörper durch Mischen von Reishülsen, bindenden Stoffen, wie Zement, Kalk oder Magnesit, mit Wasser, Gießen der plastischen Masse in Formen und Trocknen herzustellen. Bei diesem bekannten Verfahren werden den veraschten Getreideschalen jedoch calciumhaltige Bindemittel, wie Gemische von Kalk und Zement, Gips oder andere Calciumsalze mit oder ohne Zusatz von Kalk und ferner zusätzlich kleine Mengen eines Aluminiumsalzes, wie Aluminiumsulfat oder Aluminiumchlorid, zugesetzt. Im Gegensatz hierzu erfolgt die Bindung des zur Herstellung der neuen Granalien verwendeten Gemisches von Reisschalenasche, Ton und kieselsäurereichen feuerfesten Zuschlagstoffen, insbesondere Leichtschamotte, ausschließlich durch Phosphorsäure oder phosphorsaure Salze. Die neuen Granalien haben daher eine auch bei steigender Temperatur gleichmäßige Festigkeit, schwinden nicht und erschließen der Reisschalenasche ein neues Anwendungsgebiet. Although it is already known to use structural elements such as bricks and slabs, by mixing ashed grain hulls with Al203- and SiO2-containing, refractory, mineral substances as well as water and subsequent shaping and drying of the To make mixture. It is also known to produce insulating moldings by mixing of rice hulls, binding substances such as cement, lime or magnesite, with water, pouring the plastic mass in molding and drying. With this well-known However, calcium-containing binders are added to the ashed grain husks, such as mixtures of lime and cement, gypsum or other calcium salts with or without additives of lime and also small amounts of an aluminum salt such as aluminum sulfate or aluminum chloride added. In contrast to this, the binding of the to takes place Production of the new granules used mixture of rice husk ash, clay and refractory aggregates rich in silica, especially light fireclay, exclusively through phosphoric acid or phosphoric acid salts. The new granules therefore have a uniform strength even when the temperature rises, shrink not and open up a new field of application for rice husk ash.
Das Schüttgewicht der erfindungsgemäß hergestellten Granulate kann durch geeignete Einstellung der Zusammensetzung sowie durch entsprechendes Aufmahlen der Rohstoffe zwischen 0,4 und 0,7 kg/l eingestellt werden. The bulk density of the granules produced according to the invention can by suitable adjustment of the composition as well as by appropriate grinding of the raw materials between 0.4 and 0.7 kg / l.
Beispiel 1 In folgendem Ausführungsbeispiel wurde ein erfindungsgemäßes Granulat folgender Zusammensetzung unter Verwendung von 15 01o Orthophosphorsäure (43 0/o H3PO,), bezogen auf die unten angegebene Mischung, hergestellt: 500/o Reisschalenasche, 400/0 Leichtschamotte, 100/o Bindeton. Example 1 In the following exemplary embodiment, an inventive Granules of the following composition using 15 01o orthophosphoric acid (43 0 / o H3PO,), based on the mixture given below, produced: 500 / o rice husk ash, 400/0 light fireclay, 100 / o binding clay.
Das Schüttgewicht des Granulats betrug 0,7 kg/cm2. The bulk density of the granulate was 0.7 kg / cm2.
Zwischen Trockentemperatur und Sintertemperatur wurde folgende mechanische
Festigkeit ermittelt:
Beispiel 2 In folgendem Beispiel wurde ein erfindungsgemäßes Leichtgranulat (Schüttgewicht 0,7 kg/l) in einer gebräuchlichen Kornabstufung bis zu 6 mm mit einem Phosphatbindemittel torkretiert. Nach dem Torkretieren wurden an der verspritzten Masse folgende Werte ermittelt: Porosität ................... 40% Wärmeleitfähigkeit ................ 0,39 kcal/ kgh"C Druckfestigkeiten bei 200°C .................. 72 kg/cm2 bei 700°C 73 kg/cm2 bei 900°C ................... 70 kg/cm2 bei 1200°C .................. 76 kg/cm2 Schließlich können die erfindungsgemäß hergestellten Granalien wegen ihres leichten Gewichtes und ihrer hohen Festigkeit vorteilhaft als Fließbettkörper sowie als Träger für Katalysatorensubstanzen bei katalytischen Verfahren verwendet werden, die unter Temperatureinwirkung in der Gasphase stattfinden. Example 2 In the following example, a lightweight granulate according to the invention was produced (Bulk density 0.7 kg / l) in a common grain gradation of up to 6 mm with a Phosphate binder torqued. After the gate was locked, the sprayed Mass determined the following values: Porosity ................... 40% thermal conductivity ................ 0.39 kcal / kgh "C compressive strengths at 200 ° C .................. 72 kg / cm2 at 700 ° C 73 kg / cm2 at 900 ° C ................... 70 kg / cm2 at 1200 ° C .................. 76 kg / cm2 Finally, the inventively produced Granules advantageous because of their light weight and high strength as a fluidized bed body and as a carrier for catalyst substances in catalytic Processes are used which take place under the action of temperature in the gas phase.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP1271A DE1271679B (en) | 1965-01-09 | 1965-01-09 | Process for the production of porous granules |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP1271A DE1271679B (en) | 1965-01-09 | 1965-01-09 | Process for the production of porous granules |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1271679B true DE1271679B (en) | 1968-07-04 |
Family
ID=5661535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP1271A Pending DE1271679B (en) | 1965-01-09 | 1965-01-09 | Process for the production of porous granules |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1271679B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2847807A1 (en) * | 1977-11-03 | 1979-05-10 | Skamol Skarrehage Molerverk As | Lightweight refractory insulation board prodn. - from rice husks ash, perlite, mineral wool and a phosphate binder; used to line industrial furnaces |
FR2588499A1 (en) * | 1985-10-15 | 1987-04-17 | Minnesota Mining & Mfg | CERAMIC CALCINE HOLLOW SPHEROIDS AND PROCESS FOR THEIR PREPARATION |
WO2001087793A1 (en) * | 2000-05-17 | 2001-11-22 | Mario Frandino | Process for making stabilized agglomerates from ash of rice husk or rice straw |
EP2008983A1 (en) * | 2007-05-21 | 2008-12-31 | Liapor GmbH & Co. KG | Method for manufacturing an aggregate and aggregate, in particular for building materials |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE898272C (en) * | 1950-08-16 | 1953-11-30 | Mohamed Medhat Sharara | Component and process for its manufacture |
DE1075493B (en) * | 1960-02-11 | SAS Societa Apphcazioni Se condite, Bergamo (Italien) | Process for the production of load-bearing and insulating moldings for building purposes from rice hulls |
-
1965
- 1965-01-09 DE DEP1271A patent/DE1271679B/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1075493B (en) * | 1960-02-11 | SAS Societa Apphcazioni Se condite, Bergamo (Italien) | Process for the production of load-bearing and insulating moldings for building purposes from rice hulls | |
DE898272C (en) * | 1950-08-16 | 1953-11-30 | Mohamed Medhat Sharara | Component and process for its manufacture |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2847807A1 (en) * | 1977-11-03 | 1979-05-10 | Skamol Skarrehage Molerverk As | Lightweight refractory insulation board prodn. - from rice husks ash, perlite, mineral wool and a phosphate binder; used to line industrial furnaces |
FR2588499A1 (en) * | 1985-10-15 | 1987-04-17 | Minnesota Mining & Mfg | CERAMIC CALCINE HOLLOW SPHEROIDS AND PROCESS FOR THEIR PREPARATION |
WO2001087793A1 (en) * | 2000-05-17 | 2001-11-22 | Mario Frandino | Process for making stabilized agglomerates from ash of rice husk or rice straw |
EP2008983A1 (en) * | 2007-05-21 | 2008-12-31 | Liapor GmbH & Co. KG | Method for manufacturing an aggregate and aggregate, in particular for building materials |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3414967C2 (en) | Process for producing a light ceramic material for building purposes and using this material | |
EP0071897B1 (en) | Light-weight building material and method for its production | |
EP0182793B1 (en) | High porosity body used for adsorption or absorption purposes, particularly for animal litters, method for producing it and utilization thereof | |
DE2049536C3 (en) | Process for the manufacture of light ceramic products | |
DE3722242C1 (en) | Process for the production of ceramic products | |
DE1271679B (en) | Process for the production of porous granules | |
DE4139644C1 (en) | ||
DE2037937C3 (en) | Process for the production of lightweight ceramic moldings | |
DE102007062492A1 (en) | Cement-bound brick producing method for construction of house, involves producing mixture consisting of particles, hydraulically hardened cement and volume of water, pressing mixture into mold, and hardening pressed mixture | |
DE2718469A1 (en) | CERAMIC INSULATION STONES | |
DE3001151C2 (en) | Process for the manufacture of light ceramic products | |
DE846974C (en) | Manufacture of artificial stones | |
EP0208070B1 (en) | Process for producing construction materials from combustion residues | |
DE2150735C3 (en) | Process for the manufacture of light ceramic products | |
DE2161242C2 (en) | Process for the manufacture of light ceramic products | |
DE3302368A1 (en) | Heat- and sound-insulating lightweight building block and process for the manufacture thereof | |
DE2533774A1 (en) | CERAMIC DIMENSIONS, THE PROCESS FOR THEIR PRODUCTION AND THE USE OF THE DIMENSIONS FOR THE MANUFACTURE OF STONE PRODUCTS | |
DE814865C (en) | Process for the production of solid, porous building and insulating moldings | |
AT378173B (en) | METHOD FOR PRODUCING CONSTRUCTION MATERIALS | |
DE2243850A1 (en) | Foam ceramics making - by addition of foam promoter to concrete mix | |
DE2430914A1 (en) | Refractory concrete compsn. - contg. crude kaolin, clay, sand, refractory filler and cement | |
DE4418310A1 (en) | High strength insulating porous concrete body prodn. | |
DE19728525C1 (en) | Hydrothermally hardened porous concrete article | |
AT372062B (en) | FIRE-RESISTANT CERAMIC INSULATION STONES | |
DE1181611B (en) | Method and device for the production of building blocks |