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WO2006015647A1 - Procede pour produire une masse fondue minerale et brique moulee - Google Patents

Procede pour produire une masse fondue minerale et brique moulee Download PDF

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Publication number
WO2006015647A1
WO2006015647A1 PCT/EP2005/006388 EP2005006388W WO2006015647A1 WO 2006015647 A1 WO2006015647 A1 WO 2006015647A1 EP 2005006388 W EP2005006388 W EP 2005006388W WO 2006015647 A1 WO2006015647 A1 WO 2006015647A1
Authority
WO
WIPO (PCT)
Prior art keywords
mineral
sewage sludge
production
substances
melt
Prior art date
Application number
PCT/EP2005/006388
Other languages
German (de)
English (en)
Inventor
Guido Nykiel
Andreas Leismann
Miguel Gonzales Caparros
Original Assignee
Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg
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 Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg filed Critical Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg
Priority to PCT/EP2005/008636 priority Critical patent/WO2006015846A1/fr
Priority to DE200510038032 priority patent/DE102005038032A1/de
Publication of WO2006015647A1 publication Critical patent/WO2006015647A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/02—Pretreated ingredients
    • C03C1/026—Pelletisation or prereacting of powdered raw materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/002—Use of waste materials, e.g. slags
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool

Definitions

  • the invention relates to a shaped block for use in a mineral melt for the production of mineral fiber products, in particular rock wool for the production of insulation materials for thermal, acoustic and fire protection, substrates for plant breeding, Ver ⁇ strengthening fibers and fibers for filtration purposes, consisting of comminuted and bound with at least one binder residues from the production of mineral fiber products and / or from the dismantling of mineral fiber products and / or correction materials for setting the required composition and viscosity of the melt.
  • Rock wool insulation materials are used for heat, sound and / or fire protection. Further, rock wool products are used to grow plants or to strengthen, e.g. Coating materials and other products or as fibers used for filtration purposes. In the following, the exemplary listed rock wool products are summarized as mineral fiber products be ⁇ draws.
  • the prior art discloses processes for the production of mineral melts for the production of mineral fiber products.
  • These mineral fiber products consist of glassy solidified inorganic mineral fibers which are produced by means of a melting process. In this melting process Suitable raw materials are melted and then the resulting melt melted in a defibration unit. The fraying of the melt takes place, for example, in a so-called drawing, spinning or blowing process.
  • the mineral fibers are either wetted dropwise with binders and / or impregnating agents or obtained a coating of binders and / or impregnating agents, so that they are subsequently pointwise interconnected.
  • the fiber mass treated in this way can subsequently be collected, deformed and the resulting structure fixed by curing the binders.
  • Reinforcing fibers and fibers for filtration purposes are generally not treated with binder and / or impregnating agent.
  • Rock wool is mainly made from blends of crushed effusion rocks, such as basalt or diabase and small amounts of limestone, dolomite and magnesite as supplements and lumps of coarse slag. These supplements may each be added to the mixture alone or in different mixtures with each other.
  • the stones may contain fine-grained broken natural rocks.
  • Other components include production-related residues, beispiels ⁇ from the coarse constituents inevitably resulting in the manufacturing process, such as molten beads, the solidified melt with regular emptying of the melting furnaces together with the partially melted rock residues and parts of the furnace lining of refractory materials, and the insulating materials or substrates used in the trimming of an endless incurred fibrous web.
  • Other production-related residues are Ver ⁇ leftovers, defective products or Profschmelzende used insulation or substrates.
  • the production-related residues are processed for the production of molded bricks, i. crushed, ground and then mixed with correction materials.
  • the granular and fibrous components, the internal residues and the correction substances are predominantly mixed with inorganic binders, usually with the addition of water, and then pressed into moldings.
  • Inorganic binders are generally hydraulic setting Zemen ⁇ te as Portland cements CEM I 1 but also all kinds of special cements, such as high-alumina cements to understand.
  • the proportions of the binder in the Form ⁇ stones are about 9 to 15% by mass.
  • the stones after 3 days, for example, a minimum compressive strength of 3 to 5 MPa reach - these are together with the other raw materials or alone, but always together with the required lumpy fuels, the smelting aggregate abandoned
  • the correction substances can be introduced into the melting unit via direct injection.
  • the correction substances are blown directly into the oven cavity of the shaft furnace, where they melt in contact with the hot furnace gases.
  • the quantity of conveyed material can be adjusted via a dosing unit.
  • the conveyed material is stored in a closed silo, then passes into a Vor ⁇ storage container under which the metering unit, z. B. a rotary valve, ensures the ent speaking mass flow.
  • the medium used is mostly air.
  • each primary wind nozzle can be equipped with a lance.
  • the mode of operation of the injection system depends on the material to be conveyed (melting behavior) and depends in particular on the absorption capacity of the primary wind nozzle.
  • the required composition of the mixture is achieved, the kerk bewirk ⁇ a uniform and rapid melting in the melting.
  • the temperature and the viscosity of the resulting melt are influenced to such an extent that the most effective, uniformly occurring defibering process is achieved.
  • Correction substances are, for example, slags from the steel industry, such as convergent or ladle slag or melt chamber granules from coal power plants.
  • Correction substances also include substances which contain iron in oxidic and / or metallic form. Suitable ores are hematite (Fe 2 Oa) or magnetite (Fe 3 O 4 ), as well as slags from the iron and steel industry
  • the melt required for fiber formation is produced, which is then fed to the fiberizing aggregate.
  • the fiberizing unit consists of several rolls rotating at high rotational speed and offset one above the other.
  • the processability of the mineral melt has a strong dependence on the viscosity and the temperature of the melt. Both parameters can be selectively influenced by the choice of raw materials. In addition, affects the chemical composition of the melt and thus the mineral fiber products produced therefrom on their biosolubility, ie the eventual residence time of the mineral fibers in the human organism. This biosolubility results to a significant extent from the proportions of the oxides and compounds of silicon, aluminum, titanium, sodium, magnesium, potassium, calcium, iron and their relationships to one another. Furthermore, the contents of the oxides and compounds of boron and phosphorus are also important for biosolubility.
  • a typical composition of a mineral melt for the production of commercial, bio-soluble rock wool is composed essentially as follows:
  • WO 97/22563 describes a process for the production of mineral fibers.
  • molded bricks are formed of mineral material and then melted.
  • the blocks form only part of a batch to be melted.
  • the stones have a specific material containing aluminum-containing sand contaminated with foundry residues.
  • the shaped bricks may contain other industrial wastes such as, for example, converter slag or other slags from steelmaking, glass, mineral fiber cement, power plant ash, wood ash, steel mill dust and artificially produced fiber products, although the aluminum-containing sand and the other industrial grades Waste represents at least 50% of the total components.
  • a process for the production of mineral fibers is also known from WO 00/76929, wherein the mineral fibers should have at least 14 wt .-% AI2O3. From this document it is known to arrange in a furnace a charge to be melted of a mineral material containing shaped bricks which, after melting, is withdrawn from the furnace and defibered.
  • the shaped blocks have a specific, alumi ⁇ nium-containing material having an average size of less than 700 microns at a content of at least 50% by weight of A ⁇ Os and a porosity of at least 20 %, wherein the porosity is provided by pores having a diameter of less than 1 ⁇ m.
  • the blocks may also contain waste materials from the production process and binders.
  • WO 99/28248 discloses a process for the production of mineral fibers in which it is provided that the mineral fibers have at least one constituent of 14% by weight Al 2 O 3 , a batch of a starting material comprising arranged in an oven, the batch is melted in the furnace to a melt and the melt is fiberized into mineral fibers.
  • the batch should contain ferrochrome slag.
  • WO 99/28252 discloses a process for the production of mineral fibers in a proportion of at least 14 wt .-% Al 2 O 3 , wherein in a shaft furnace, a self-supporting column of a mineral charge is placed, containing the stones, the batch to provide a Melt is melted in the base region of the furnace, which melt has the composition required for the mineral fibers to be produced. Furthermore, it is provided that the melt is withdrawn from the base region of the furnace and defibered. At least one quarter of the aluminum contained in the charge is provided as a special mineral-containing mineral in the shaped bricks, this mineral containing aluminum containing between 0.5 and 10% by weight of metallic aluminum, 50 to 90% by weight. % Al 2 O 3 and 0 to 49.5% by weight of other materials.
  • WO 2004/041734 A1 discloses processes for producing a mineral melt for the production of mineral fibers in which residual materials and correction substances originating from at least production are comminuted to adjust the required composition and viscosity of the melt, the residual substances and the correction substances with a Binders are bound and pressed into shaped bricks, wherein the shaped bricks are fed to a melting aggregate zu ⁇ .
  • components of the blocks are at least partially substituted by combustion residues, wherein the combustion residues are granular.
  • the correction substances mixed with the residues originating from the production for the production of the molded blocks are at least partially substituted by combustion residues.
  • the substitution achieves a substantial reduction of the binder, in particular of the cement fraction, which is normally required, which results in a substantial improvement in the economic viability of the manufacturer. ment of such molding blocks results.
  • the combustion residues are granular in order to ensure a good cohesion of the stones.
  • the invention has the object to further develop a generic method for producing a mineral melt for the production of mineral fiber products or a molded block such that on the one hand reduces the cost of raw materials, but at the same time Properties of the mineral fiber products to be produced are not deteriorated and improved in particular with regard to their insulating properties and biosolubility.
  • the solution of this problem provides, in the case of a method according to the invention, that the molded bricks are supplied with dried sewage sludge which at least partially substitutes, in particular, the correction substances.
  • a shaped block which comprises dried sewage sludge as constituent, the dried sewage sludge in particular at least partially substituting the correction substances
  • composition of the sewage sludge varies depending on the origin of the sewage or on the method of sewage sludge treatment.
  • the wastewater passes through different clarification stages such as compaction plant, sand trap, primary clarification, activation and secondary clarification.
  • the mechanical cleaning the non-dissolved solids are removed from the wastewater in the first place.
  • the dissolved impurities carbon, phosphorus and nitrogen
  • the resulting sewage sludge is further treated in the digester (anaerobic digestion).
  • a dry residue of up to 90% can be achieved.
  • a dried sewage sludge with a dry residue> 85% is used.
  • Sewage sludges with lower dry contents are also suitable, but make higher demands on the conveyor.
  • sewage sludge with dry residues ⁇ 85% are conveyed, in particular with screw conveyors. The use of a pneumatic conveying system is not readily possible with these sewage sludge.
  • sewage sludge makes it possible to substitute in a substantial proportion individual constituents presently contained in bricks for the production of mineral fiber products.
  • the proportion of dried sewage sludge in the shaped bricks can be up to 20% by mass. If the sludge is introduced directly into the melt, in particular blown in, the injection quantity can be up to 5% of the raw material input from dried sewage sludge.
  • the dry sewage sludge described above has a chemical composition which is particularly suitable for the correction of the mineral melt for the production of mineral fibers.
  • the dried sewage sludge can be used, for example, for targeted viscosity control of the mineral Use melt. This viscosity has a decisive influence on the product properties of the mineral wool.
  • the proportion of aluminum oxide (Al 2 O 3) in the sewage sludge and / or the shaped bricks enables the substitution of other alumina supports.
  • the aluminum oxide itself promotes the biosolubility of the mineral fibers.
  • the inventive method also has the advantage that the dried sewage sludge can be recycled material. In this way, the costs in sewage treatment plants are reduced, so that the sewage sludge can generally be taken off the sewage treatment plants free of charge.
  • the method according to the invention therefore opens up a further sensible and environmentally friendly use of sewage sludge in addition to landfilling, thermal utilization / disposal, agricultural use, composting and use in landscaping.
  • the surprising advantage has been found that the carbon content contained in the sewage sludge is converted into latent heat, so that a reduction of the gas or oil consumption can be achieved in the thermal afterburning.
  • an increase in the H 2 content is achieved, so that the CO concentration increases in the exhaust gas.
  • molded bricks consisting of 38 to 64 mass% of production-related residues, 5 to 20 mass% dried sewage sludge, 0 to 11 mass% converter slag, 0 to 14 mass% ladle slag, 10 to 25 Mass% Al 2 ⁇ 3 carrier, and 9 to 15 mass% cement.
  • this composition in comparison with a corresponding composition of shaped bricks according to the prior art, in particular the proportion of ladle slag (Fe 2 O 3 and CaO support) is substituted, resulting in a reduction of the production costs of the molded bricks.
  • solidified melts As production-related residues, solidified melts, separated spherical or columnar glass particles and / or defective or recycled mineral fiber insulation products, filter dusts from the production process, residues of remainders and / or parts of a refractory furnace lining are used.
  • the constituents are comminuted to a particle size of ⁇ 7 mm and pressed with a Portland cement microfine grain size as a binder into shaped bricks with a polygonal cross-section.
  • the proportion of Portland cement is 10% by mass.
  • the shaped bricks, together with a primary energy source, for example coke and effusion rocks, for example basalt and diabase, are given off and melted to form a melting aggregate designed as a cupola.
  • a resulting melt is deposited above a slag bed of the cupola furnace. pulled and fed to a fiberizing aggregate.
  • the fiberizing unit has a plurality of spinning wheels, which are driven in rotation at high peripheral speed.
  • the enamel is broken down into microfine mineral fibers by means of these spinning wheels.
  • the mineral fibers are then wetted with at least one binder and deposited on an endless conveyor, for example a conveyor belt. Subsequently, mineral fiber insulating products in the form of plates, shaped bodies or webs are produced from a fiber web formed therefrom.
  • the Mineralfaserdämmstoff area can have different fiber profiles.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Glass Compositions (AREA)

Abstract

La présente invention concerne un procédé pour produire une masse fondue minérale afin de produire des produits en fibres minérales, notamment de la laine minérale, pour fabriquer des matériaux isolants permettant d'assurer une protection contre la chaleur, le bruit et l'incendie, des substrats pour la culture de végétaux, des fibres de renfort ou des fibres utilisées à des fins de filtration. Ce procédé consiste à chauffer un matériau de charge dans une unité de fusion, jusqu'à la température de fusion. Selon cette invention, on ajoute à ce matériau de charge des sous-produits issus au moins de la production de produits à base de fibres minérales et/ou des produits de correction, afin d'obtenir la composition et la viscosité nécessaires de la masse fondue. Les sous-produits et/ou les produits de correction sont broyés et comprimés avec un liant afin de former des briques moulées, puis les briques moulées sont introduites dans l'unité de fusion. L'objectif de la présente invention est de développer un procédé de ce type pour produire une masse fondue minérale afin de produire des produits en fibres minérales ou une brique moulée, de manière d'une part à réduire les coûts des matières premières, et d'autre part à ne pas détériorer les propriétés des produits à base de fibres minérales à fabriquer, et en particulier à améliorer ces propriétés pour ce qui est des caractéristiques d'isolation et de la biosolubilité. A cette fin, des boues résiduaires séchées sont ajoutées aux briques moulées et permettent de remplacer notamment les produits de correction, au moins en partie.
PCT/EP2005/006388 2004-08-09 2005-06-15 Procede pour produire une masse fondue minerale et brique moulee WO2006015647A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2005/008636 WO2006015846A1 (fr) 2004-08-09 2005-08-09 Procede pour produire une matiere fondue minerale et des briques moulees
DE200510038032 DE102005038032A1 (de) 2004-08-09 2005-08-09 Verfahren zur Herstellung einer mineralischen Schmelze sowie Formstein

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004038764.8 2004-08-09
DE102004038764 2004-08-09

Publications (1)

Publication Number Publication Date
WO2006015647A1 true WO2006015647A1 (fr) 2006-02-16

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Application Number Title Priority Date Filing Date
PCT/EP2005/006388 WO2006015647A1 (fr) 2004-08-09 2005-06-15 Procede pour produire une masse fondue minerale et brique moulee

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010146075A1 (fr) * 2009-06-19 2010-12-23 Rockwool International A/S Procédé de traitement de laine de roche
WO2023020746A1 (fr) 2021-08-16 2023-02-23 Ibe Anlagentechnik Gmbh Procédé de fabrication sans déchets de produits de matériau isolant en laine minérale

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183150A (ja) * 1985-02-08 1986-08-15 Osaka Gas Co Ltd グラスファイバ−の製造法
EP0468414A2 (fr) * 1990-07-26 1992-01-29 Senji Kaneko Papier utilisant de la laine de laitier
WO1996037263A1 (fr) * 1995-05-24 1996-11-28 Asset Associates Limited Procede de fabrication de produits a partir de matieres-dechets
WO1999028248A1 (fr) * 1997-12-02 1999-06-10 Rockwool International A/S Procede de production de fibres vitreuses
WO2000076929A1 (fr) * 1999-06-10 2000-12-21 Rockwool International A/S Briquettes, leur utilisation dans la fabrication de fibres minerales et leur production
WO2001042154A1 (fr) * 1999-12-06 2001-06-14 Rgs90 Procede de fabrication de verre et verre produit selon ce procede
WO2004041734A1 (fr) * 2002-11-06 2004-05-21 Rockwool International A/S Procede de preparation d'une masse minerale fondue

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183150A (ja) * 1985-02-08 1986-08-15 Osaka Gas Co Ltd グラスファイバ−の製造法
EP0468414A2 (fr) * 1990-07-26 1992-01-29 Senji Kaneko Papier utilisant de la laine de laitier
WO1996037263A1 (fr) * 1995-05-24 1996-11-28 Asset Associates Limited Procede de fabrication de produits a partir de matieres-dechets
WO1999028248A1 (fr) * 1997-12-02 1999-06-10 Rockwool International A/S Procede de production de fibres vitreuses
WO2000076929A1 (fr) * 1999-06-10 2000-12-21 Rockwool International A/S Briquettes, leur utilisation dans la fabrication de fibres minerales et leur production
WO2001042154A1 (fr) * 1999-12-06 2001-06-14 Rgs90 Procede de fabrication de verre et verre produit selon ce procede
WO2004041734A1 (fr) * 2002-11-06 2004-05-21 Rockwool International A/S Procede de preparation d'une masse minerale fondue
WO2004041735A1 (fr) * 2002-11-06 2004-05-21 Rockwool International A/S Procedes destines a former des fibres minerales

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 003 (C - 395) 7 January 1987 (1987-01-07) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010146075A1 (fr) * 2009-06-19 2010-12-23 Rockwool International A/S Procédé de traitement de laine de roche
US9056789B2 (en) 2009-06-19 2015-06-16 Rockwell International A/S Method of treating stone wool
EA022185B1 (ru) * 2009-06-19 2015-11-30 Роквул Интернэшнл А/С Способ обработки каменной ваты
WO2023020746A1 (fr) 2021-08-16 2023-02-23 Ibe Anlagentechnik Gmbh Procédé de fabrication sans déchets de produits de matériau isolant en laine minérale

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