DE102005005691A1 - Binder based on calcium aluminate - Google Patents

Abstract

The present invention relates to a binder composition containing calcium aluminate or a calcium aluminate-containing cement composition, at least one surface-active component and at least one flow agent, a process for solidifying inorganic and / or organic goods using such a binder composition and the solidified goods obtained by this process.

Description

The The present invention relates to a binder composition, containing calcium aluminate or a calcium aluminate-containing cement composition, at least one surface-active component and at least one flow agent, a process for the solidification of inorganic and / or organic Goods under Use of such a binder composition and the after solidified goods obtained by this process.

The Invention allows For example, an intelligent extraction of raw materials from metallurgical waste. So can from a variety of inorganic and / or organic starting materials (waste), such as Gout dust, gout mud, converter dust, converter sludge, mill scale, Koksabrieb, blast furnace slag, blast furnace sand, steel mill slag, Metal and steel slags, Metal oxide and metal-containing dusts and sludges new Plant and starting materials as well as energy carriers are created. This allows the Invention the production of solid forms from various inorganic and / or organic starting materials, such as. B. the production of Recycling Möller, various Aggregates and / or energy sources, taking into account the for the further processing required ingredients.

The Pig iron production by reduction of oxidic iron ores with coke takes place predominantly in high blower shaft furnaces ("blast furnaces"). For example 1 ton of pig iron is 2 t of ore, 1 t of coke, ½ t surcharge and 5½ t of "wind" required. Out this numerical ratio are the big, procedural Losses of the blast furnace process apparent. The "losses" in steel production are production-related up to 35% of the pig iron used. Falling at the blast furnace process 250 kg blast furnace slag and sand per ton of pig iron and approx. 300 kg gout dust and mud and approx. 50 kg coke abrasion, as well as coke parts in the gout dust and mud. For the production of steel it is necessary the carbon content of pig iron to a share in the Usually less than 1.7%. The decarburization of the pig iron For example, by the fresh wind process (perfect Decarburization and subsequent recarburization) or by the fresh hearth method ("Siemens Martin process", direct decarburization to desired Carbon content). In both cases fall again in each case Slags process typical composition on. So fall in the steelworks 120 kg steel mill slag per ton of crude steel and approx. 150 kg Converter dust and sludge and approx. 75 kg of mill scale (depending on Production different).

Metal and steel slags arise in the extraction of (NE) metals. metal oxide Dusts and sludges fall during the production or modification and recycling of (NE) metals. Metallic dusts accumulate in the metalworking industry (auto industry), z. B. grinding dust and fine chips as well as muds.

Constantly stricter Ongoing environmental regulations on the one hand and growing cost pressure on the other On the other hand, companies are responsible for producing iron and steel and manufacturing industry, metallurgical waste is no longer a landfill, but recycling in the process in which they occur or to another. For example, the rules applicable from 2005 onwards that the TOC content in the landfill must be below 5%. If z. For example, the carbon content of goods to be dumped above this Value must be The trash be thermally treated before dumping, which is the corresponding Procedure economically disadvantaged. Furthermore, see you For example, the pig iron producers for many reasons with constantly decreasing Profit margins (high energy prices, high reductant prices, high aggregate prices, higher expectant disposal prices etc.). This results in a great need at low cost Raw materials or input materials.

Currently stand for the abovementioned wastes are inadequate or insufficient and expensive recovery or disposal procedures available. A the causes of it is that this waste many times in one for the processing unfavorable Shape. e.g. as very small particles or in an unbound or to form such small particles tending form. Disadvantageous Such manifestations are common their low cohesion and therefore their low mechanical strength and formability.

The WO-A-02/079527 describes a process for solidifying mill scale, Gout dust and other metal oxide and metal-containing dusts, sludges and Grusen, in which these are mixed with clay and skeletal silicates, in forms and at least 800 ° C burning.

It is an object of the present invention to provide a binder composition which is suitable for solidifying various inorganic and / or organic substances, in particular the said waste materials, in order to bring them into a recyclable form. Here are the solidified products by good performance properties, such as a good green strength, good compressive strength, good Ab abrasion and / or shear strength and / or good homogeneity. In particular, solidification should also be possible substantially without heating (cold pressing).

Surprisingly It has now been found that this task by the use of a binder based on calcium aluminate or a calcium aluminate-containing Cement composition solved becomes.

• a) wenigstens ein Calciumaluminat oder eine Calciumaluminat-haltige Zementzusammensetzung, und
• b) wenigstens eine oberflächenaktive Komponente, und/oder
• c) wenigstens ein Fließmittel, das ausgewählt ist unter Polycarboxylatethern, Celluloseethern und Mischungen davon.

The invention relates to a binder composition containing

• a) at least one calcium aluminate or a calcium aluminate-containing cement composition, and
• b) at least one surface-active component, and / or
• c) at least one flow agent selected from polycarboxylate ethers, cellulose ethers and mixtures thereof.

The Inventive binder composition contains the calcium aluminate component a) and at least one further component which is selected under components b) and c). Preferably, the proportion Component a) 70 to 98 wt .-%, based on the total weight the binder composition. Preferably, the proportion to component (s) a) and / or b) 2 to 30 wt .-%, based on the Total weight of binder composition.

• – 70 bis 98 Gew.-%, bevorzugt 92 bis 96 Gew.-%, der Komponente a),
• – 2 bis 30 Gew.-%, bevorzugt 3 bis 10 Gew.-%, der Komponente b), und
• – 0,05 bis 1,5 Gew.-%, bevorzugt 0,1 bis 1,0 Gew.-%, der Komponente c),

mit der Maßgabe, dass sich die Komponenten zu 100 Gew.-% addieren.In a specific embodiment, the binder composition according to the invention contains

• From 70 to 98% by weight, preferably from 92 to 96% by weight, of component a),
• From 2 to 30% by weight, preferably from 3 to 10% by weight, of component b), and
• From 0.05 to 1.5% by weight, preferably from 0.1 to 1.0% by weight, of component c),

with the proviso that the components add up to 100% by weight.

Component a)

Suitable components a) are customary calcium aluminates and minerals containing them, such as CaAl ₂ O ₄ , Ca ₂ Al ₂ O ₅ , Ca ₃ Al ₂ O ₆ , Ca ₁₂ Al _{14 4} O ₃₃ , Ca ₂ Al ₂ O ₅ · SiO ₂ or Ca ₄ Al ₂ O ₇ .Fe ₂ O ₃ . Preferably, however, a calcium aluminate-containing cement composition is used as component a). This then contains, for example, one or more of the aforementioned calcium aluminates. Due to their high aluminum oxide content, such types of cements are also referred to as alumina cements and are generally distinguished by good water-binding capacity. Particularly suitable are cement types with an increased content of calcium aluminates (calcium aluminate-stressed cement clinker). The calcium aluminate content is usually in these types of cement at least 25 wt .-%, in particular at least 30 wt .-% and in particular at least 40 wt .-%, based on the total weight of component a). The upper limit of the calcium aluminate content of component a) is of minor importance for the use according to the invention and may be up to 80% by weight or more. Preferably, the calcium silicate content of component a) is not more than 60 wt .-%, more preferably not more than 40 wt .-%, based on the total weight of component a). The calcium ferrite content of component a) is preferably not more than 10% by weight, more preferably not more than 5% by weight, based on the total weight of component a). If desired, component a) may contain in some cases, ie not more than 50% by weight, preferably not more than 25% by weight, in particular not more than 10% by weight, based on the total weight of component a), of granulated blastfurnace slag.

The term "alumina cement" is familiar to the person skilled in the art, for example from Römpp Chemielexikon, 9th edition, Cement Suitable clay cements are described extensively in the literature, for example in Betoniek 11/8, 1998, pp. 1-8, cement-lime gypsum 9/1993, pp 560-566 and in DE-A 43 30 595, DE-A 197 27 979 and DE 100 05 221 , Such types of cement are commercially available under the name "alumina cement" or "alumina cement", for example from Heidelberger Zement AG or Heidelberger Calcium Aluminates, Ardex GmbH, Dyckerhoff AG and Lafarge Calcium Aluminates Inc.

Component b)

The Component b) is preferably selected from cationic surfactants, Strength, Starch derivatives, Cellulose, cellulose derivatives, carboxyl group-containing polymers, hydrophobic group-modified polyesters with hydrophobic groups Group modified polyurethanes and mixtures thereof.

As component b) suitable cationic surfactants are generally quaternary ammonium compounds of the general formula (R ₄ N ⁺ ) X ^- . These include, for example, compounds in which the nitrogen group with different lengths of alkyl radicals, eg. B. is substituted with two long and two short alkyl radicals. This includes z. Dimethyldi- (C ₆ -C ₃₀ ) -alkylammonium compounds such as dimethyldistearylammonium chloride, dimethyldicetylammonium chloride, etc. Preferred cationic surfactants are highly cationic surfactants which are distinguished by a high proportion of cationic charge equivalents. These generally include polyme which contain cationic or cationizable groups. These groups can be derived from monomers selected from N-vinylamines, aziridines, diallyldialkylammonium compounds, vinyl-containing nitrogen heterocycles such as N-vinylimidazoles, etc.

Mono- and polyamines are also suitable as component b). These include, for example, primary alkylamines, preferably primary C ₆ -C ₃₀ -alkylamines, such as 1-hexylamine, 1-heptylamine, 1-octylamine, 1-nonylamine, 1-decylamine, 1-undecylamine, 1-undec-10-enylamine, 1 Tridecylamine, 1-tetradecylamine, 1-pentadecylamine, 1-hexadecylamine, 1-heptadecylamine, 1-octadecylamine, 1-octadeca-9,12-dienylamine, 1-nonadecylamine, 1-eicosylamine, 1-eicos-9-enylamine, 1 Heneicosylamine, 1-docosylamine and in particular amine mixtures produced from naturally occurring fatty acids, such as. As tallow fatty amines containing predominantly saturated and unsaturated C ₁₄ -, C ₁₆ - and C ₁₈ -alkyl amines, hydrogenated tallow fatty amines, coconut amines, the saturated, mono- and diunsaturated C ₆ -C ₂₂ -, preferably C ₁₂ -C ₁₄ alkyl amines contain, or hydrogenated cocoamines. These include diamines, such as ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, etc.

to Preparation of the binder compositions according to the invention it may be advantageous to use the cationic described previously as component b) Surfactants, mono- and Polyamines together with an organic solvent, preferably one at least partially water-miscible organic solvent to formulate. These include z. As alcohols, such as ethanol, propanol and especially isopropanol, as well as higher quality Alcohols and alcohol ethers, such as ethylene glycol, diethylene glycol, etc.

When Component b) are further suitable starch, starch derivatives, cellulose and Cellulose derivatives, as they usually do z. B. be used as protective colloids. These include z. Methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, carboxymethyl starch, starch degradation products, like roast dextrins and saccharified starches etc. Preferred as component b) are used pastes, d. H. on strength and / or cellulose based adhesives in the form of aqueous Quellungsprodukte. Basic raw materials for suitable pastes are z. Flour, starch as well as water-soluble Derivatives of cellulose and starch. The latter include in particular cellulose ethers (carboxymethyl and methylcelluloses) and starch ethers (eg carboxymethyl starch).

When Component b) are furthermore suitable carboxyl-containing polymers, in particular carboxyl-containing acrylic polymers. These include, for example Homopolymers and copolymers of acrylic acid and methacrylic acid and their salts.

Further suitable as component b) are polyesters modified with hydrophobic groups. For the preparation of these polyesters are in principle the well-known polycarboxylic acids, hydroxycarboxylic acids and polyols. Suitable polycarboxylic acids are, for. Aliphatic and aromatic dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, phthalic acid, isophthalic acid, terephthalic acid and mixtures thereof. Suitable polyols are, for. B. straight-chain and branched, aliphatic, cycloaliphatic and aromatic alcohols having two or more than two hydroxyl groups. These include z. As ethylene glycol, diethylene glycol, glycerol, etc. Preferred are polyesters based on pentaerythritol. For incorporation of hydrophobic groups, these polyesters may contain mono- or polyhydric alcohols having long chain alkyl groups and / or carboxylic acids having long chain alkyl groups incorporated therein. Suitable are monoalcohols and monocarboxylic acids with C ₈ -C ₃₀ -alkyl groups. They are preferably natural or synthetic fatty acids and fatty alcohols. These include z. Capric, undecanoic, lauric, tridecanoic, myristic, pentadecanoic, palmitic, margaric, stearic, lignoceric, melissic, palmitoleic, oleic, linoleic, linolenic etc. as well as the corresponding monohydric alcohols obtainable by reduction of the fatty acids. In a suitable embodiment, the polyester b) used is a peaerythritol-based polyester modified with fatty acids from soybean oil.

When Component b) are further modified with hydrophobic groups Polyurethanes. The production of polyurethanes is generally by Reaction of Dioder polyisocyanates with compounds that are resistant to isocyanate groups have reactive groups. These include the aforementioned polyols, especially pentaerythritol. For insertion of hydrophobic groups can from the aforementioned components, first isocyanate group-containing prepolymers made and this afterwards with the aforementioned monohydric or polyhydric alcohols and / or carboxylic acids be reacted with long-chain alkyl groups. A suitable embodiment of Component b) is one with fatty acids from linseed oil modified polyurethane based on pentaerythritol.

Component c)

Suitable polycarboxylate ethers c) are in principle modified polycarboxylates which have at least one polyalkylene oxide-containing group in the main chain or a side chain. The attachment of the polyalkylene oxide chains can be carried out, for example, via ester, ether, imide and / or amide groups. In a suitable embodiment, the polycarboxylate ethers are derived from polycarboxylates, the poly merrückgrat carries one or more alkylene oxide side chains. The ether groups are z. As polyethylene glycols, polypropylene glycols and block copolymers of ethylene oxide and propylene oxide, which contain the alkylene oxide randomly distributed or polymerized in the form of blocks.

suitable Components c) are also cellulose ethers, d. H. Cellulose derivatives, by partial or complete Substitution of the hydrogen atoms of the hydroxy groups of the cellulose by alkyl and / or aralkyl groups, the functional non-, on- or contain cationic groups, can be produced. The etherification of the cellulose is carried out, for example, by reaction with (Ar) alkyl halides, e.g. Methyl, ethyl, benzyl chloride, 2-chloroethyldiethylamine, Chloroacetic acid, Alkylene oxides, such as ethylene oxide, propylene oxide and butylene oxide, glycidol, Glycidyltrimethylammonium chloride and acrylic monomers, such as acrylonitrile, Acrylamide, vinylsulfonic acid. Preferably, activated cellulose, e.g. B. with Bases, such as aqueous sodium hydroxide, activated cellulose used. Suitable cellulose ethers and methods for their production are in Römpp, Chemielexikon, 9th edition, p. 617-618, Thieme Verlag, 1995, which is referred to here.

Good to be consolidated

The material to be consolidated is preferably selected from gout dust, gout mud, Converter dust, converter sludge, mill scale, coke dust, coke dust, Blast furnace slag, blast furnace sand, steel mill slag, metal slag, of which various metal and metal oxide dusts and sludges and Mixtures thereof.

In a preferred embodiment If the material to be consolidated is a material for use in a blast furnace, cupola or other smelting device (so-called "recycling Möller"). This preferably contains a ore substitute from metallurgical waste, coke and, if required, aggregates.

The Weight ratio from solidifying material to binder is preferably in one Range from 99: 1 to 65: 35, more preferably 95: 5 to 70 30, especially 90:10 to 80:20.

• i) ein zu verfestigendes anorganisches Gut mit wenigstens einer Bindemittelzusammensetzung, wie zuvor definiert, sowie gegebenenfalls zusätzlich Wasser und gegebenenfalls weiteren Zusatzstoffen vermischt, und
• ii) die in Schritt i) erhaltene Mischung verpresst.

Another object of the invention is a process for the solidification of inorganic goods, wherein

• i) an inorganic material to be consolidated with at least one binder composition, as defined above, and optionally additionally water and optionally further additives, and
• ii) compressing the mixture obtained in step i).

• – die Abtrennung unerwünschter Komponenten des Gutes durch wenigsten ein physikalisches oder chemisches Trennverfahren,
• – die Zerkleinerung des Gutes,
• – die Homogenisierung des Gutes,

und Kombinationen der zuvor genannten Behandlungsschritte.The material to be consolidated may be subjected to pretreatment prior to its use in step i). These include, for example

• The separation of undesired components of the product by at least one physical or chemical separation process,
• - the comminution of the goods,
• - the homogenization of the goods,

and combinations of the aforementioned treatment steps.

Preferably indicates the material to be consolidated before its use in step i) a mean grain size of at most 8 mm, more preferably at most 5 mm.

By the mixing in step i) is a plastically deformable, flowable or pourable Received mass in which the inorganic to be solidified and / or organic material and the binder are evenly distributed. The So obtained mass can be fed directly to the compression usually. In particular, when the material to be solidified contains coke or consisting of this is a good homogenization in step i) required since Mixtures of coke fine dusts with water a reopexes structure can form and then difficult to bind.

• – 70 bis 95 Gew.-%, besonders bevorzugt 80 bis 90 Gew.-%, zu verfestigendes Gut und, falls vorhanden, Zusatzstoffe,
• – 3 bis 30 Gew.-%, besonders bevorzugt 7 bis 15 Gew.-%, erfindungsgemäßes Bindemittel, und
• – 2 bis 8 Gew.-%, besonders bevorzugt 3 bis 6 Gew.-%, Wasser

enthält.Preferably, in step i), a mixture is obtained which

• From 70 to 95% by weight, more preferably from 80 to 90% by weight, of the material to be consolidated and, if present, additives,
• From 3 to 30% by weight, more preferably from 7 to 15% by weight, of the binder according to the invention, and
• - 2 to 8 wt .-%, particularly preferably 3 to 6 wt .-%, water

contains.

For pressing in step ii), a conventional device suitable for compacting and / or shaping can be used. These include, for example, roller cushion presses, piston presses, extruders, etc. The pressing pressure is preferably in a range of 100 to 300 N / mm ² , particularly preferably 120 to 200 N / mm ² .

If desired, the compositions can be processed into shaped articles, in particular bricks, bricks, briquettes, pellets, etc. Preferably, moldings are made in the range of 1 to 10 cm (length) x 1 to 10 cm (width) x 1 to 15 cm (height). Also suitable are substantially roundish shaped bodies with an average diameter of 1 to 20 cm, preferably 3 to 8 cm. Suitable processes for the production of moldings from mineral materials are known to the person skilled in the art.

The Drying, curing and / or final consolidation of the goods to be consolidated is usually carried out by let yourself go in the air or by heating to a temperature of up to 150 ° C, preferably up to 120 ° C. At temperatures below 0 ° C the drying process is usually undesirably slow. Preferably takes place the drying for cost reasons in the range of the ambient temperature (10 to 35 ° C).

• – das zu verfestigende Gut und die Bindemittelzusammensetzung oder die Komponenten der Zusammensetzung bereitstellt,
• – die bereitgestellten Komponenten jeweils über wenigstens eine Dosiervorrichtung der Mischvorrichtung zuführt und vermischt,
• – die vermischten Komponenten wenigstens einer Pressvorrichtung zuführt und verpresst.

A suitable embodiment is a method in which one

• Providing the material to be consolidated and the binder composition or components of the composition,
• The components supplied are fed to the mixing device via at least one metering device and mixed,
• - The mixed components feeds at least one pressing device and pressed.

The aforementioned method is advantageously suitable for producing solidified products of defined composition. Conventional, preferably computer-based devices and methods can be used to control this process. Preferred is a method in which one obtains in the mixing device at least one measured value for the contents of the individual components of the composition, compares this measured value with a desired value and forms control interventions for controlling the metering of these components into the mixing device from this comparison. For example, one starts with components of a precisely defined composition. This is understood to mean components in which the contents of the main components as well as the contents of those secondary components were determined which either influence the desired material properties or in which, for other reasons, eg. B. due to legal provisions, certain volume ranges must be complied with (for use in the blast furnace process include the contents of C, Fe, CaO, Al ₂ O ₃ , SiO ₂ and the more undesirable secondary components Zn, Pb, Cl, S, Na, K.). The determination of the individual contents of the components can then be carried out simply via a weighing device in the mixing device. This also allows the adjustment of the desired water content by adding an appropriate amount of water. Unless pre-analyzed components are used, the measured values obtained may be, for example, pH, conductivity, grayscale, color, extinction and / or transmittance values. These can be obtained by the usual methods (eg by means of a pH electrode, conductivity sensor, black-and-white or color camera or with a color sensor). During operation, the currently measured data is compared with stored target data. If there is no match then a switching signal is triggered to control the metering devices.

In the method according to the invention, the representation of the essential operating parameters on a screen or a comparable peripheral device preferably takes place. 1 shows such a representation of a process for the production of "recycling Möller" in a Microsoft Excel ^® table. This representation is also the subject of the present invention. For the feedstocks 1 to n (1 = gout sludge by way of example, and further eg gout dust, mill scale, etc.) as well as the binder and coke, the contents of main components and certain impurities are entered (analysis contents). Taking into account the mixing ratios required at the blast furnace (in this case ore: coke: aggregate = 2: 1: 0.5), the composition is given as it is added to the mixing device.

By the inventive method If you are now able to the losses described above (to waste) drastically. The process draws minimal use compared to other methods of energy - cold pressing - for recovery of the raw material.

One Another object of the invention is a solidified composition, which is obtainable by the method described above.

The compositions according to the invention are distinguished by an excellent green strength (strength immediately after production). This is preferably at least 10 N / mm ² . The compositions are thus pourable immediately after preparation without losing their shape or disintegrating again.

The compositions according to the invention preferably have an early strength according to DIN EN 196 after 12 h at 20 ° C. of at least 12 N / mm ² , in particular at least 14 N / mm ² , ie at least 30%, in particular at least 35% of the final strength.

The strength is preferably 30 days after preparation at least 40 N / mm ² .

The Compositions of the invention are also characterized by a very good abrasion and / or shear strength out.

Compositions according to the invention for the Use in a blast furnace, cupola or other melting device (so-called "recycling Möller") are characterized by a high homogeneity and good reducibility. They are therefore not only suitable for use in reductive melting, such as the blast furnace process, special also for per se non-reductive methods, such as electric arc method or induction furnace method.

The Compositions of the invention are also characterized by a low elution. The especially applies to Compositions using a binder according to the invention prepared as component b) highly cationic surfactants contains. Thereby the method according to the invention is suitable also for the treatment of waste to be landfilled, which subsequently favorable Landfills (landfill class 2, instead of 3 or higher) can be spent.

The inventive method is also suitable for the preparation of compositions for use in the blast furnace process, if in this a calcareous gait to Use comes. In this case, it is necessary alumina and siliceous Supplements (eg feldspar, slate, etc.). The inventive method allows the Production of these supplements from waste, which significantly reduces costs can. Suitable waste materials originate for example from the treatment of primary slags from aluminum production and are referred to as Mill-dust. A direct use of this mill-worth in the blast furnace process is due its fine structure and the associated risk of explosion not possible. Of course allows the process not only involves the production of a corresponding surcharge, but also, as described above, a complete feedstock made of ore with calcareous gait, coke and aggregate Alumina and silicic acid-containing Surcharges.

The inventive method is also suitable for the production of fuels based on coke from fine or dusty coke feed materials.

advantageously, can the aforementioned products (eg recycling bins, certain surcharges, energy sources, etc.) with the same equipment and generally without changing the binder getting produced.

The Invention will be apparent from the following non-limiting Examples closer explained.

example 1

56% by weight blast-furnace light-bed sludge (Fe content 39.15%, residual moisture 30%) were mixed with 27% by weight coke and 17% by weight ceramic binder (96% by weight calcium aluminate cement clinker (Buzetzki technical office, Vienna), 35% by weight of 1,2-propylenediamine and 0.5% by weight of polycarboxylate ether (commercial concrete plasticizer)) in a forced mixer (Eirich brand). The addition of additional water was not required. Subsequently, the mass obtained was shaped into briquettes in a roll briquetting plant from Köppern using a pressure of 60 N / mm ² . The green strength (compressive strength immediately after preparation) was 12 N / mm ² , the compressive strength after 3 days 18 N / mm ² and after 7 days 28 N / mm ² . These are well above the required for this application pressure strengths of 10 N / mm ² .

Example 2

56 wt .-% Blast Furnace Sludge (Fe content 39.15%, residual moisture content of 30%) with 27 wt .-% coke and 17 wt .-% ceramic binder according to the invention (96 wt .-% calcium aluminate accented cement clinker, 3.5 wt % Of dimethyldistearylammonium chloride (25% by weight of surfactant, 75% by weight of isopropanol) and 0.5% by weight of polycarboxylate ether) were mixed in a forced mixer (Eirich brand). The addition of additional water was not required. Subsequently, the mass obtained was shaped into briquettes in a roll briquetting plant from Köppern using a pressure of 60 N / mm ² . The green strength was 16 N / mm ² , the compressive strength after 3 days was 24 N / mm ² and after 7 days 25 N / mm ² .

Example 3

39.2% by weight of gout dust was mixed with 37% by weight of coke, 17% by weight of ceramic binder according to the invention (96% by weight of calcium aluminate cement clinker, 3.5% by weight of hydrogenated tallow fatty amine and 0.5% by weight). -% polycarboxylate ether) and 16.8 wt .-% water in a forced mixer (Eirich brand) mixed. Subsequently, the mass obtained was shaped into briquettes in a roll briquetting plant from Köppern using a pressure of 60 N / mm ² . The green strength (compressive strength immediately after preparation) was 16 N / mm ² , the compressive strength after 3 days was 23 N / mm ² and after 7 days 27 N / mm ² .

Claims (11)

Binder composition containing a) at least one calcium aluminate or a calcium aluminate-containing cement composition and b) at least one surface-active component and / or c) at least one flow agent selected from polycarboxylate ethers, cellulose ethers and mixtures thereof. A binder composition according to claim 1, comprising - 70 to 98% by weight, preferably 92 to 96% by weight, of component a), - 2 to 30 wt .-%, preferably 3 to 10 wt .-%, of component b), and - 0.05 to 1.5% by weight, preferably 0.1 to 1.0% by weight, of component c) With the proviso that the components add up to 100 wt .-%. A binder composition according to any one of claims 1 or 2, wherein the component b) is selected from cationic Surfactants, mono- and polyamines, starch, starch derivatives, cellulose, cellulose derivatives, Carboxyl-containing polymers modified with hydrophobic groups Polyesters, hydrophobic group-modified polyurethanes and mixtures thereof. Process for the solidification of inorganic goods, in one man i) a material to be consolidated with at least one binder composition, as in any of the claims defined, and optionally additionally water and optionally other additives mixed, and ii) in step i) pressed mixture pressed. The method of claim 4, wherein the to be solidified Well selected is under gout dust, gout mud, converter dust, converter sludge, mill scale, Coke dust, coke abrasion, blast furnace slag, blast furnace sand, steel mill slag, metal slag, of which various metal and metal oxide-containing dusts and whitewash and mixtures thereof. Method according to one of claims 4 or 5, wherein the solidifying good selected is under materials for use in a blast furnace, cupola or other melting device, The method of claim 6, wherein the to be solidified Good a ore substitute from metallurgical waste, coke and, if necessary, contains aggregates. Method according to one of claims 4 to 7, wherein the weight ratio of to be solidified to binder in a range of 99: 1 to 65:35, preferably 95: 5 to 70:30, in particular 90:10 to 80: 20, lies. Method according to one of claims 4 to 8, in which - that too solidifying material and the binder composition or components providing the composition - the provided components each over supplying at least one metering device to the mixing device and mixed, - the mixed components feeds at least one pressing device and pressed. wherein in the mixing device at least one measured value for the Content of each component wins, this reading with a Setpoint compares and from this comparison control interventions for Control of the dosage of these components in the mixing device forms. Method according to one of claims 4 to 9, wherein the applied in step b) pressing pressure in a range of 100 to 300 N / mm ² , more preferably 120 to 200 N / mm ² , is located. Solidified composition obtainable by a process as in any of the claims 4 to 10 defined.