DD244547A1 - CERAMIC MATERIAL - Google Patents

CERAMIC MATERIAL Download PDF

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Publication number
DD244547A1
DD244547A1 DD85284869A DD28486985A DD244547A1 DD 244547 A1 DD244547 A1 DD 244547A1 DD 85284869 A DD85284869 A DD 85284869A DD 28486985 A DD28486985 A DD 28486985A DD 244547 A1 DD244547 A1 DD 244547A1
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DD
German Democratic Republic
Prior art keywords
ceramic material
material according
item
heat
ceramic
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DD85284869A
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German (de)
Inventor
Ulrich Morgenstern
Peter Hillme
Franz Kanthak
Hubert Pacholik
Wolfgang Tschierswitz
Achim Neumann
Mathias Poetzsch
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Florin Stahl Walzwerk
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Application filed by Florin Stahl Walzwerk filed Critical Florin Stahl Walzwerk
Priority to DD85284869A priority Critical patent/DD244547A1/en
Priority to DE19863642759 priority patent/DE3642759A1/en
Priority to BE905958A priority patent/BE905958A/en
Priority to SE8605454A priority patent/SE8605454L/en
Priority to HU534986A priority patent/HUT46614A/en
Priority to FR8617865A priority patent/FR2592036A1/en
Priority to NO865174A priority patent/NO865174L/en
Publication of DD244547A1 publication Critical patent/DD244547A1/en

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    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
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    • 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
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    • 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
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    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements
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    • C04B33/00—Clay-wares
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    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/135—Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1352—Fuel ashes, e.g. fly ash
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    • C04B33/132—Waste materials; Refuse; Residues
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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    • 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
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • 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
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Abstract

Ceramic material for use in heating installations of all branches of technology as a heat-storing material or wear material with the aim of economically exploiting secondary raw materials containing iron oxide and at the same time generating savings in materials and energy as well as a decrease in the aggregates, while retaining a chemical resistance in the furnaces. The subject lies in the development of a ceramic material for heat storage, this material having a high volume stability and a stability with regard to changes in elevated temperature of up to 1400 DEG C, this material being based on iron oxide. It involves obtaining a high volumetric heat capacity and a high heat transmission coefficient to guarantee a high heat storage capacity with the smallest possible volume and optimum heating and cooling rates. In accordance with the invention, and in order to do this, secondary raw materials containing high contents of iron oxide are used, such as scale or clinker of iron or ferrous alloys as well as slag and/or fly dust from furnaces and/or inorganic fluxes, in mixtures of a particle size such that a high apparent density, preferably higher than 3.0 g/cm<3>, and a high stability with regard to temperature changes is obtained.

Description

Anwendungsgebiet der ErfindungField of application of the invention

Die Erfindung betrifft ein keramisches Material zur Wärmespeicherung mit hoher Volumen- und Temperaturwechselbeständigkeit, das als Formkörper oder Fertigbauteil bzw. Spritzmasse oder Mörtel oder Stampfmasse Verwendung finden kann.The invention relates to a ceramic material for heat storage with high volume and thermal shock resistance, which can be used as a molded body or prefabricated or injection molding compound or mortar or ramming.

Die Anwendung ist möglich in Wärmeanlagen der Keramik-, Glas-, Feuerfest- sowie chemischen und metallverarbeitenden Industrie sowie der Metallurgie, vorzugsweise als Verschleißmaterial sowie als Wärmespeichermedium in brennstoff- oder elektrisch beheizten Speicherofen, z. B. Kachel- und Nachtstromspeicheröfen und in Regeneratoren statischer oder rotierender Bauweise.The application is possible in thermal systems of the ceramic, glass, refractory and chemical and metal processing industry and metallurgy, preferably as a wear material and as a heat storage medium in fuel or electrically heated storage furnace, z. As tile and Nachtstromspeicheröfen and regenerators static or rotating construction.

Charakteristik der bekannten technischen LösungenCharacteristic of the known technical solutions

In der Metallurgie und anderen Zweigen der Volkswirtschaft fallen große Mengen hocheisenoxidhaltige Sekundärrohstoffe an, die nur teilweise genutzt werden. So wird z. B. ein Teil des anfallenden Zunders oder der Ferroschlacke als Entkohlungsmittel genutzt oder dem Hochofenprozeß als Eisenträger zugeführt. Ein großer Teil des Zunders konnte bisher auf Grund seiner Teilchengröße und der Vermengung mit organischen Bestandteilen keiner weiteren Verwertung zugeführt werden und mußte auf Halde verkippt werden.In metallurgy and other branches of the economy large quantities of high-iron oxide-containing secondary raw materials accumulate, which are only partially used. So z. B. a portion of the resulting scale or the ferrous slag used as a decarburizing or fed to the blast furnace process as an iron carrier. Due to its particle size and its mixing with organic constituents, a large part of the scale could not be recycled and had to be dumped.

Es ist bekannt, daß Eisenoxide eine hohe volumetrische Wärmekapazität besitzen.It is known that iron oxides have a high volumetric heat capacity.

Es ist nach DE-OS 2457324 bekannt, Ferrotoxid und ein Kalzium-Additiv bei hohen Temperaturen zu mischen. Das Gemisch wird gepreßt und die Formkörper anschließend gesintert.It is known from DE-OS 2457324 to mix ferrotoxide and a calcium additive at high temperatures. The mixture is pressed and the shaped bodies are then sintered.

Dabei ist ein hoher Energiebedarf erforderlich. Λ This requires a high energy requirement. Λ

Bei der Lösung nach DE-OS 3413679 wird ein Wärmespeicherungsblock vorzugsweise aus Magnetit und einem Phosphatbindemittel hergestellt. Dadurch entfällt der Brennprozeß, jedoch ist noch ein Härteprozeß bis 150cC erforderlich. Ein weiterer Nachteil dieser Lösung ist die ungenügende Volumenbeständigkeit dieser Materialien bei hohen Temperaturen.In the solution according to DE-OS 3413679, a heat storage block is preferably made of magnetite and a phosphate binder. This eliminates the burning process, however, a hardening process is still required to 150 c C. Another disadvantage of this solution is the insufficient volume resistance of these materials at high temperatures.

Ziel der ErfindungObject of the invention

Das Ziel der Erfindung ist die Bereitstellung eines keramischen Materials zur Wärmespeicherung, welches durch Verwendung von vorwiegend in der Metallurgie anfallenden eisenoxidhaltigen Sekundärrohstoffen, insbesondere Eisenoxidverbindungen wie Zunder, Schlacke und Ofenflugstaub und gegebenenfalls Zugabe von mineralischen Zuschlagstoffen sehr ökonomisch hergestellt werden kann.The object of the invention is to provide a ceramic material for heat storage, which can be produced very economically by using predominantly in metallurgy incurred iron oxide secondary raw materials, especially iron oxide compounds such as scale, slag and Ofenflugstaub and optionally adding mineral aggregates.

Die Sekundärrohstoffe werden einer Veredlung zugeführt, und gleichzeitig werden hochwertige Primärrohstoffe ersetzt. Das keramische Material besitzt eine hohe chemische Resistenz gegenüber Ofenstäuben, Zunder und Schlacke, eine hohe Volumen- und Temperaturwechselbeständigkeit bis 1400°C sowie eine hohe volumetrische Wärmekapazität, die höher liegt als die der bisher eingesetzten Materialien aus natürlichen oder künstlichen Rohstoffen. Das führt beim Einsatz zur Volumenverkleinerung der Aggregate, Material- und Energieeinsparungen. Ein zusätzlicher katalytischer Effekt kann beim Einsatz in Nachheizflächen von brennstoffbeheizten Speicheröfen erzielt werden, wodurch die Schadstoffemission in den Abgasen vermindert wird.The secondary raw materials are processed and at the same time high quality primary raw materials are replaced. The ceramic material has a high chemical resistance to furnace dusts, scale and slag, a high volume and thermal shock resistance up to 1400 ° C and a high volumetric heat capacity, which is higher than that of previously used materials from natural or artificial raw materials. When used, this leads to volume reduction of the units, material and energy savings. An additional catalytic effect can be achieved when used in Nachheizflächen of fuel-fired storage heaters, whereby the pollutant emission in the exhaust gases is reduced.

Darlegung des Wesens der ErfindungExplanation of the essence of the invention

Der Erfindung liegt die Aufgabe zugrunde, ein keramisches Material zur Wärmespeicherung mit hoher Volumenkonstanz und Temperaturwechselbeständigkeit bis 14000C auf Eisenoxidbasis herzustellen. Dabei gilt es, eine hohe volumetrische Wärmekapazität und eine hohe Wärmeeindringzahl zu erreichen, um ein großes Wärmespeicherungsvermögen bei kleinstem Volumen und optimalen Aufheiz- und Abkühlgeschwindigkeiten zu garantieren.The invention has for its object to produce a ceramic material for heat storage with high volume constancy and thermal shock resistance to 1400 0 C on iron oxide. It is important to achieve a high volumetric heat capacity and a high heat input in order to guarantee a high heat storage capacity with the smallest volume and optimal heating and cooling rates.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß hocheisenoxidhaltige Sekundärrohstoffe, insbesondere Eisenoxidverbindungen, z. B. bestehend aus Fe3O4, Fe2O3, FeO wie Zunder von Eisen bzw. -legierungen und metallurgischer Schlacke und/oder in Elektroofen anfallender Ofenf lugstaub und/oder mineralische Zuschlagstoffe Verwendung finden und die die Verwendung von chemischer, keramischer oder hydraulischer Bindung gestatten.According to the invention, this object is achieved in that hocheisenoxidhaltige secondary raw materials, especially iron oxide compounds, for. B. consisting of Fe 3 O 4 , Fe 2 O 3 , FeO such as scale of iron or alloys and metallurgical slag and / or incurred in electric furnace Ofenf lugstaub and / or mineral aggregates use and the use of chemical, ceramic or allow hydraulic binding.

Die bei verschiedenen Prozessen anfallenden eisenoxidhaltigen Sekundärrohstoffen sowie mineralischen Zuschlagstoffen können in Mischungen solcher Kornfraktionen verwendet werden, daß eine hohe Rohdichte, vorzugsweise größer 3,0 g/cm3 und hohe Temperaturwechselbeständigkeit gegeben ist.The resulting in various processes iron oxide secondary raw materials and mineral aggregates can be used in mixtures of such grain fractions that a high bulk density, preferably greater than 3.0 g / cm 3 and high thermal shock resistance is given.

Als mineralischer Zuschlagstoff kann ein Bindemittel dienen und/oder Feuerfestmaterialien, insbesondere Alumosilikate und/oder Materialien auf Magnesit und/oder Chromerz und/oder Forsteritbasis Verwendung finden, die selbst bereits in Wärmeanlagen eingesetzt waren und als Sekundärmaterial zur Verfügung stehen.As a mineral additive can serve a binder and / or refractory materials, especially aluminosilicates and / or materials on magnesite and / or chrome ore and / or Forsteritbasis be used, which were themselves already used in thermal systems and are available as a secondary material.

Je nach Einsatzzweck können bis zu 40 Ma.-% feinteiliger Serpentinit und/oder Dunit und/oder Feldspat und/oder Basalt zugegeben werden.Depending on the purpose, up to 40% by weight of finely divided serpentinite and / or dunite and / or feldspar and / or basalt can be added.

In der keramischen Masse können kleinteilige Metallpartikel enthalten sein oder werden dieser beigemischt.In the ceramic mass small-particle metal particles may be included or be added thereto.

Die keramische Masse kann je nach Kornaufbau zu beliebigen Formkörpern oder Fertigbauteilen, Spritzmassen, Mörtel oder Stampfgemenge verarbeitet werden.Depending on the grain structure, the ceramic composition can be processed into any desired shaped bodies or prefabricated components, sprayed materials, mortar or stamping mixture.

Die Formkörper oder Fertigbauteile können je nach Mischungsaufbau thermisch oder hydrothermisch nachbehandelt werden.The moldings or prefabricated components can be thermally or hydrothermally post-treated depending on the composition of the mixture.

Ausführungsbeispieleembodiments

Das erfindungsgemäße keramische Material wird nachstehend anhand einiger Zusammensetzungen näher erläutert:The ceramic material according to the invention is explained in more detail below with reference to a few compositions:

Beispiel 1: 60 Ma.-% Zunder 0 bis 3 mmExample 1: 60% by weight scale 0 to 3 mm

32 Ma.-% metallurg. Schlacke 0 bis 8 mm32% by weight of metallurgy. Slag 0 to 8 mm

8Ma.-%TZ70 .8Ma .-% TZ70.

Beispiel 2: 50 Ma.-% Zunder 0 bis 3 mmExample 2: 50% by weight scale 0 to 3 mm

11,5 Ma.-% metallurg. Schlacke 0 bis 20 mm11.5 mass% metallurg. Slag 0 to 20 mm

35 Ma.-% Magnesitbruch 0 bis 8 mm35% by weight magnesite fracture 0 to 8 mm

1,5 Ma.-%Ton (Brandts) 0 bis 0,2 mm 2 Ma.-% MgSO4 (trocken)1.5% by weight of clay (Brandts) 0 to 0.2 mm 2% by weight of MgSO 4 (dry)

Beispiel3: 60Ma.-%Zunder 0bis8mmExample 3: 60% by weight scale 0 to 8mm

13 Ma.-% metallurg. Schlacke 0bis3mm13% by weight of metallurgy. Slag 0 to 3mm

20Ma.-%Dunitmehl 0 bis 0,2 mm 7Ma.-%TZ7020 Ma .-% Dunitmehl 0 to 0.2 mm 7Ma .-% TZ70

Beispiel 4: 55 Ma. -% Zunder 0 bis 3 mmExample 4: 55 Ma. -% scale 0 to 3 mm

30 Ma.-% Ferrochromschlacke 0 bis 8 mm " 30% by weight of ferrochrome slag 0 to 8 mm "

13Ma.-%E-Ofen-Flugstaub 0bis0,1mm 2Ma.-%TZ5013Ma .-% E furnace flue dust 0 to 0.1mm 2Ma .-% TZ50

"Beispiel 5: 40 Ma.-% Zunder 0 bis 8 mmExample 5: 40% by weight scale 0 to 8 mm

40 Ma.-% Zunder 0 bis 2 mm40% by weight of scale 0 to 2 mm

12 Ma.-% Schlackemehl 0bis0,1mm 8Ma.-%TZ5012% by weight slag meal 0 to 0.1 mm 8% by mass TZ50

Beispiele: 55 Ma.-% Zunder 0 bis 8 mmExamples: 55% by weight scale 0 to 8 mm

20 Ma.-% Zunder Obisimm20% by weight of tinder Obisimm

10 Ma.-% Tiefofenschlacke 0bis3mm10% by weight deep furnace slag 0bis3mm

7 Ma.-% Stahlspäne7% by weight of steel chips

8Ma.-%TZ508mA .-% TZ50

Claims (10)

Patentansprüche:claims: 1. Keramisches Material zur Wärmespeicherung mit hoher Volumen- und Temperaturwechselbeständigkeit bis 1 400°C, dadurch gekennzeichnet, daß 20 bis 80 Ma.-% Zunder von Eisen bzw. -legierungen und 0 bis 60Ma.-% metallurgische Schlacke (z. B. Tiefofen- oder Ferrochromschlacke) und/oder 0 bis 20 Ma.-% E-Ofen-Flugstaub und/oder 0 bis 60Ma.-% mineralische Zuschlagstoffe enthalten sind und hydraulische und/oder chemische und/oder keramische Binder eingesetzt werden.1. Ceramic material for heat storage with high volume and thermal shock resistance to 1 400 ° C, characterized in that 20 to 80 wt .-% scale of iron or alloys and 0 to 60Ma .-% metallurgical slag (eg. Tiefofen- or Ferrochromschlacke) and / or 0 to 20 wt .-% E furnace flue dust and / or 0 to 60Ma .-% mineral aggregates are included and hydraulic and / or chemical and / or ceramic binders are used. 2. Keramisches Material nach Pkt. 1, dadurch gekennzeichnet, daß die bei verschiedenen Wärme-, Wärmebehandlungs-, Verformungs-, Schmelz- und Gießprozessen anfallenden eisenoxidhaltigen Sekundärrohstoffe in Mischungen solcher Kornfraktionen verwendet werden, daß eine hohe Rohdichte, vorzugsweise größer 3,0 g/cm3 gegeben ist.2. Ceramic material according to item 1, characterized in that used in various heat, heat treatment, deformation, melting and casting processes iron oxide-containing secondary raw materials are used in mixtures of such grain fractions that a high bulk density, preferably greater than 3.0 g / cm 3 is given. 3. Keramisches Material nach Pkt. 1 und 2, dadurch gekennzeichnet, daß ein Bindemittel als mineralischer Zuschlagstoff dient.3. Ceramic material according to item 1 and 2, characterized in that a binder serves as a mineral additive. 4. Keramisches Material nach Pkt. 1 bis 3, dadurch gekennzeichnet, daß als mineralischer Zuschlagstoff Feuerfestmaterialien, insbesondere Alumosilikate und/oder Stoffe auf Magnesit- und/oder Chromerz- und/oder Forsteritbasis Verwendung finden.4. Ceramic material according to Pkt. 1 to 3, characterized in that find use as a mineral additive refractory materials, in particular aluminosilicates and / or substances based on magnesite and / or chrome ore and / or Forsteritbasis. 5. Keramisches Material nach Pkt. 4, dadurch gekennzeichnet, daß das verwendeten Feuerfestmaterial Sekundärmaterial darstellt, welches bereits in Wärmeanlagen im Einsatz war.5. Ceramic material according to item 4, characterized in that the refractory material used is secondary material, which was already in heat plants in use. 6. Keramisches Material nach Pkt. 1 bis 5, dadurch gekennzeichnet, daß dem Gemisch bis zu 40 Ma.-%Serpentinit und/oder Dunit und/oder Feldspat und/oder Basalt zugegeben werden.6. Ceramic material according to item 1 to 5, characterized in that the mixture up to 40 wt .-% serpentinite and / or dunite and / or feldspar and / or basalt are added. 7. Keramisches Material nach Pkt. 1 bis 6, dadurch gekennzeichnet, daß kleinteilige Metallpartikel aus Eisenverbindungen und/oder Aluminiumverbindungen zugegeben werden.7. Ceramic material according to item 1 to 6, characterized in that small-particle metal particles of iron compounds and / or aluminum compounds are added. 8. Keramisches Material nach Pkt. 1 bis 7, dadurch gekennzeichnet, daß die aufbereite kermaische Masse durch Stampfen, Schleudern und/oder Rütteln und/oder Pressen oder Gießen gegebenenfalls unter Zusatz von Wasser und/oder Dispersionsmitteln zu beliebigen Formkörpern oder Fertigbauteilen verarbeitet werden kann, mit vorzugsweise Rohrdichten größer 3,0 g/cm3.8. Ceramic material according to item 1 to 7, characterized in that the prepared kermaische mass can be processed by stamping, spinning and / or shaking and / or pressing or casting optionally with the addition of water and / or dispersants to any shaped articles or prefabricated components , preferably with pipe densities greater than 3.0 g / cm 3 . 9. Keramisches Material nach Pkt. 1 bis 8, dadurch gekennzeichnet, daß die Formkörper oder Fertigbauteile thermisch oder hydrothermisch behandelt werden.9. Ceramic material according to Pkt. 1 to 8, characterized in that the shaped bodies or prefabricated components are treated thermally or hydrothermally. 10. Keramisches Material nach Pkt. 1 bis 9, dadurch gekennzeichnet, daß die aufbereitete keramische Masse in entsprechenden Kornfraktionen gegebenenfalls unter Zusatz von alkali- oder alumosilikatischem Bindemittel oder Spritzmasse oder Mörtel oder Plastiks oder Stampfmasse zur Anwendung kommt.10. Ceramic material according Pkt. 1 to 9, characterized in that the prepared ceramic mass in appropriate grain fractions optionally with the addition of alkali or aluminosilicate binder or molding compound or mortar or plastic or ramming mass is used.
DD85284869A 1985-12-20 1985-12-20 CERAMIC MATERIAL DD244547A1 (en)

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DD85284869A DD244547A1 (en) 1985-12-20 1985-12-20 CERAMIC MATERIAL
DE19863642759 DE3642759A1 (en) 1985-12-20 1986-12-15 CERAMIC MATERIAL
BE905958A BE905958A (en) 1985-12-20 1986-12-17 Ceramic material
SE8605454A SE8605454L (en) 1985-12-20 1986-12-18 CERAMIC
HU534986A HUT46614A (en) 1985-12-20 1986-12-19 Ceramic material
FR8617865A FR2592036A1 (en) 1985-12-20 1986-12-19 Ceramic material
NO865174A NO865174L (en) 1985-12-20 1986-12-19 CERAMIC MATERIALS.

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CN111848187A (en) * 2020-07-08 2020-10-30 甘肃酒钢集团宏兴钢铁股份有限公司 Method for preparing iron ladle castable by using high-carbon ferrochrome slag

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US5278111A (en) * 1992-04-10 1994-01-11 Frame Scott W Electric arc furnace dust as raw material for brick
ES2099033B1 (en) * 1995-09-19 1998-02-16 Univ Santiago Compostela PROCEDURE FOR OBTAINING CERAMIC BLOCKS OF HEAT ACCUMULATORS FROM RED MUDS OF THE BAYER PROCESS.
ES2126478B1 (en) * 1996-02-21 1999-12-01 Univ Santiago Compostela PROCEDURE FOR OBTAINING HIGH-DENSITY CERAMIC MATERIALS FROM PIRITAS ASHES.
DE19629099A1 (en) * 1996-06-25 1998-01-02 Anton Grehl Ceramic product production
ES2183673B1 (en) * 2000-02-03 2004-09-01 Sic Lazaro, S.L. PROCEDURE FOR THE MANUFACTURE OF HIGH DENSITY COUNTERWEIGHTS.
CN100494307C (en) * 2006-06-27 2009-06-03 武汉理工大学 Preparation of heat accumulating material for solar energy medium temperature steam electricity generation
CN101717267B (en) * 2009-11-24 2012-02-08 武汉科技大学 Lightweight brick prepared from porzite roller rod waste material as raw material and preparation method thereof

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* Cited by examiner, † Cited by third party
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CN111848187A (en) * 2020-07-08 2020-10-30 甘肃酒钢集团宏兴钢铁股份有限公司 Method for preparing iron ladle castable by using high-carbon ferrochrome slag

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SE8605454L (en) 1987-06-21
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FR2592036A1 (en) 1987-06-26
DE3642759A1 (en) 1987-10-01
NO865174D0 (en) 1986-12-19

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