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WO2001096614A1 - Revetement destine a etre utilise dans des hauts fourneaux - Google Patents

Revetement destine a etre utilise dans des hauts fourneaux Download PDF

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Publication number
WO2001096614A1
WO2001096614A1 PCT/DK2001/000415 DK0100415W WO0196614A1 WO 2001096614 A1 WO2001096614 A1 WO 2001096614A1 DK 0100415 W DK0100415 W DK 0100415W WO 0196614 A1 WO0196614 A1 WO 0196614A1
Authority
WO
WIPO (PCT)
Prior art keywords
interior surface
lining
blast furnace
ceramic
lining according
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.)
Ceased
Application number
PCT/DK2001/000415
Other languages
English (en)
Inventor
Niels-Verner Lund
Knud Lund Eriksen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2001265821A priority Critical patent/AU2001265821A1/en
Priority to CA002412705A priority patent/CA2412705A1/fr
Publication of WO2001096614A1 publication Critical patent/WO2001096614A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/04—Blast furnaces with special refractories
    • C21B7/06—Linings for furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass

Definitions

  • the present invention relates to a lining for use in blast furnaces as used in power sta- tions and the like having an interior surface which can come into contact with slag particles as well as an insulating layer consisting of an inorganic insulation material which surrounds the blast furnace lining.
  • the invention also relates to a lining for use in blast furnaces for power stations and the like, especially blast furnaces using fuels of biological origin.
  • lining for use in blastfurnaces shall be construed as meaning that the lining is arranged in the area of the furnace where the mineral part of the fuel in the shape of furnace slag particles falls towards the bottom of the oven.
  • the bottom of the oven will normally consist of a water filled bath.
  • the slag particles are removed by a slag removing device, which will continuously remove the instantly cooled particles which have fallen into the water.
  • the use of insulation is effected in order to bring down the temperature on the outside of the furnace, the side which is turned towards the surroundings where people can come into contact with the construction.
  • the surface temperature of the side of the construction which people can come into contact with is usually set to be a maximum of 65 °C warm. This is the safety value which has been chosen in order for people working in the vicinity of blast furnaces and the like not to get burnt, if they accidentally should touch the surface of the oven.
  • a lining for a blast furnace comprises three distinct layers.
  • An innermost layer consisting of ceramic tiles, an intermediate layer comprising insulating bricks and an outer layer in the shape of a cladding.
  • US-S-3887173 From US-S-3887173 is another blast furnace construction known. This construction is completely uninsulated, but has burnt bricks containing a high allumina type cement as its surface facing the slag particles inside the blast furnace.
  • the slag particles resulting from the burning of coal are characteristic in that they are acidic. Therefore certain types of steel have been developed which have been modified in order to endure the influence from acidic slag particles at the high temperatures which arise in blast furnaces, typically in the order of 350 °C - 400 °C.
  • Bio fuels for example straw or wood chips or wood shavings
  • slag particles have a very high alkalinity.
  • steel types which will remain stable under the influence of slag particles from bio fuels at the temperatures which are present in the section of the blast furnace where the slag particles come.
  • This lack of durability against the slag particles with a high alkaline content is a problem which causes a need to often replace and renovate the lining in ovens which use bio fuels. In order to replace and renovate the interior of the oven, it is necessary to shut the active oven down. This is a very time-consuming and costly exercise.
  • the blast furnace wall will consist as described above of a interior steel lining having an insulation outside the steel layer.
  • the insulation is a mineral or glass wool, which consists of minuscule inorganic fibres kept together by a carbolic acid.
  • carbolic acid will disintegrate and evaporate and minuscule vibrations will cause the fibre structure without the binder to collapse which will cause the fibres to be rattled loose and gather in cavities. This leaves uninsulated cavities in the blast furnace wall.
  • this part of the wall will be greatly reduced in relation to the theoretic insulation at which the wall was designed had the insulation material, for example the mineral or glass wool, had its fibres in the theoretically manufactured arrangement.
  • This lack of insulation is obviously a problem in itself in that the control of the oven will be very difficult and the oven itself will be exposed to temperature gradients which it was not designed for.
  • the surface of the oven facing areas where people will have access to it will reach temperatures above the 65 °C, which is the safe level without getting burnt.
  • the interior surface of the lining is resistant against slag particles with a high alkalinity and will in itself be able to withstand alkalinic slag particles at the tem- peratures which are occurring in blast furnaces of this type.
  • the above object is achieved by the present invention by providing a lining comprising an insulation which comprises one or more layers of a cement based foam.
  • the foam is placed between the interior surface of the blast furnace and the load carrying construction, which is arranged around the blast furnace.
  • the invention hereby provides a novel insulation of the type which does not collapse and which is easy to place and which will not let respirable fibres loose in the environment.
  • an interior surface in the blast furnace of a ceramic or semi-ceramic material which will be able to resist the influence of alkalinic slag particles and temperatures, which are occurring in blast furnaces of this type which are fed by bio fuels, set temperatures being at least 350 °C to 400 °C and up to about 1100 °C to l200 °C.
  • a concrete like material can advantageously be used.
  • a cement which can endure high temperatures for example an aluminous cement is used and prefer- able a compact binder is used.
  • the compact binder can be achieved by an intimate composition of particles from an aluminous cement with ultra fine inorganic particles, for example from an amorphous silica, for example the land of silicium which is used in the production process of silicone metals.
  • insulation foam which in an economic way gives technically and environmental advantages is the use of a foam called Cemskum, sold by Cemsystems I/S.
  • the foam can be foamed in situ between the interior surface and the exterior load carrying construction.
  • the interior lining made from a ceramic or semi-ceramic material which can resist high temperatures and can resist the influence of alkaline slag particles at the temperatures which are present in the blast furnace, an improved durability of the blast furnace as a hole is achieved.
  • the durability of the blast furnace is improved the economy of running the blast furnace as explained above is also improved by not having to shut down the oven in order to repair or replace parts of the interior of the blast furnace.
  • more non- planned stops of the oven can be greatly reduced.
  • the interior ceramic or semi-ceramic surface can advantageously be made from a concrete like material where there during the manufacturing process is used a cement which can endure high temperatures, for example an aluminous cement.
  • compact binders are used, which are achieved by an intimate composition of particles of a aluminous cement with ultra fine inorganic particles, for example -from an amorphous silicium, for example a silica which is manufactured by producing a silicone metal.
  • ultra fine inorganic particles for example -from an amorphous silicium, for example a silica which is manufactured by producing a silicone metal.
  • fig. 1 shows a wall in a blast furnace according to the invention seen from the inside
  • fig. 2 shows an end wall in the blast furnace shown in figure 1 ,
  • fig. 3 shows the other end wall of the blast furnace
  • fig. 4 shows the principle in the construction of an element having an interior surface
  • fig. 5 shows the principle in the construction of another element for an interior surface.
  • Figure 1 illustrates a first wall 1, respectively a second wall 2, in the blast furnace interior seen from the inside. It is illustrated that there is used premanufactured elements 3,4 of which four are equipped with recesses 5 for arrangement of nozzles 6 (see figure 2) for injection of cooling water which will cause disintegration and instant cooling of larger slag particles.
  • the premanufactured elements 3,4 are mounted on fixtures (not shown) which are fastened to the exterior load carrying steel or reinforced concrete construction.
  • Figure 2 illustrates one end wall 7 and cuts through the walls 1,2.
  • Figure 3 shows the other end wall 8 and a cut through the walls 1,2.
  • FIG 2 and 3 the construction is illustrated in which is used an interior lining of premanufactured elements 3,4 and an intermediate insulating layer 9 where this is geometrically possible and technically necessary which is above a water bath 10 equipped with means 11 for removing slag particles from the bottom of said water bath 10.
  • figure 4 The principle of the construction of a plain element 3 is illustrated in figure 4. This element is intended for being built in at the interior surface of the blast furnace. A position for the element 3 is illustrated in figure 2.
  • FIG. 5 The principle of making a more complicated interior lining element 12 is illustrated in figure 5.
  • This element 12 is intended for being mounted on the interior surface of the blast furnace.
  • a position for the element 12 is illustrated in figure 2.
  • the interior ceramic or semi-ceramic surface is equipped with an arrangement of 30 mm thick pre- manufactured plate elements 3,4,12 which are equipped with cylindrical welding bushings 13 with a perforation 14, which facilitates that the plate elements 3,4,12 can be welded on to load bearing elements (not shown) which also have the additional function as being distance keepers.
  • the distance keepers maintain the distance between the surrounding load carrying support construction, for example a steel con- struction or a reinforced concrete construction and inwards towards the interior of the blast furnace.
  • the cylindrical welding bushings 13 are welded on to a net 15 of stainless steel rods 16 which constitute the primary reinforcement in the elements 3,4,12.
  • the elements are made of a steel fibre reinforced abrasion resistant and high temperature stabile material 17 which is cast at room temperature and also hardened at room temperature.
  • the material 17 consists of 1/3 by weight of pulverised bauxite with a grain size in the interval from 1 mm - 3 mm, 1/3 part by weight of ground bauxite with a grain size in the interval from 0 mm - 1 mm and 1/3 part by weight of Cemsystems' binder AL6310.
  • a water content equal to about 20 % by weight of the amount of binder.
  • the high temperature stable and stainless steel fibres have been added in an amount of 3 % by weight of the binder and in one example is of the type sold by the name Densit Stahl Faser, 1.4841 with dimensions diameter 0,40 mm, length 12,5 mm.
  • Casting of the elements is done by vibrating the casting material in steel moulds. Immediately after casting the material in the steel moulds a curing compound has been applied to all free surfaces. The newly cast material with the applied curing compound has then been left for hardening in the steel mould. The following day the elements has been demoulded and the element has thereafter been left for hardening until mounting.
  • the thermal insulation used in the example is manufactured in situ by Cemskum which is described in a brochure for Cemskum, type RC2-0TS/I40-TAR5.
  • Cemskum which is described in a brochure for Cemskum, type RC2-0TS/I40-TAR5.
  • the foam material is mixed and by a standard pump pumped into the space between the premanufactured elements and the outer load carrying construction. Pumping of the material can take place by a relatively simple pump means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

La présente invention concerne un revêtement destiné à être utilisé dans un haut fourneau de préférence dans les hauts fourneaux brûlant des combustibles biologiques tels que par exemple de la paille, des copeaux ou des rognures de bois et autres ainsi que dans des chambres de combustion de centrales énergétiques dans lesquelles on utilise un combustible d'origine biologique, ce revêtement comportant une surface intérieure qui se trouve en contact avec des particules de scories. La surface intérieure est recouverte d'éléments (3, 4, 12) en matière céramique ou semi-céramique et d'un isolant en matière alvéolaire à base de ciment qui se présente sous forme d'au moins une couche (17). La matière alvéolaire est avantageusement placée entre la surface intérieure et une structure externe supportant la charge qui peut être par exemple un pilier en acier prévu à l'extérieur du haut fourneau. Avec un tel revêtement de haut fourneau, on élimine le risque que la matière d'isolation s'affaisse et que la paroi intérieure se détériore du fait de la composition chimique des particules de scories se trouvant dans la chambre de combustion brûlant des combustibles d'origine biologique.
PCT/DK2001/000415 2000-06-15 2001-06-14 Revetement destine a etre utilise dans des hauts fourneaux Ceased WO2001096614A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2001265821A AU2001265821A1 (en) 2000-06-15 2001-06-14 Lining for use in blast furnaces
CA002412705A CA2412705A1 (fr) 2000-06-15 2001-06-14 Revetement destine a etre utilise dans des hauts fourneaux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200000207U DK200000207U3 (da) 2000-06-15 2000-06-15 Slaggefald
DKBA200000207 2000-06-15

Publications (1)

Publication Number Publication Date
WO2001096614A1 true WO2001096614A1 (fr) 2001-12-20

Family

ID=8159107

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2001/000415 Ceased WO2001096614A1 (fr) 2000-06-15 2001-06-14 Revetement destine a etre utilise dans des hauts fourneaux

Country Status (5)

Country Link
US (1) US20030155695A1 (fr)
AU (1) AU2001265821A1 (fr)
CA (1) CA2412705A1 (fr)
DK (1) DK200000207U3 (fr)
WO (1) WO2001096614A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8691340B2 (en) 2008-12-31 2014-04-08 Apinee, Inc. Preservation of wood, compositions and methods thereof
US9878464B1 (en) 2011-06-30 2018-01-30 Apinee, Inc. Preservation of cellulosic materials, compositions and methods thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672649A (en) * 1970-09-11 1972-06-27 J E Allen & Associates Inc Shaft or stack furnace and method and apparatus for lining same
US3810610A (en) * 1972-09-11 1974-05-14 Andco Inc Bosh construction for metallurgical furnaces
FR2617181A1 (fr) * 1987-06-29 1988-12-30 Garessus Claude Fabrication de charbon de bois a partir de fours de carbonisation en beton arme, demontables, non polluants, a marche alternative pour le presechage et la carbonisation de produits ligneux
EP0640573A1 (fr) * 1993-03-10 1995-03-01 Krosaki Corporation Materiau refractaire calorifuge
US5485986A (en) * 1991-08-12 1996-01-23 Huls Troisdorf Ag Furnace with in situ foamed insulation and process for its manufacture

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3330627A (en) * 1963-09-09 1967-07-11 Titanium Metals Corp Corrosion resistant chlorinator lining

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672649A (en) * 1970-09-11 1972-06-27 J E Allen & Associates Inc Shaft or stack furnace and method and apparatus for lining same
US3810610A (en) * 1972-09-11 1974-05-14 Andco Inc Bosh construction for metallurgical furnaces
FR2617181A1 (fr) * 1987-06-29 1988-12-30 Garessus Claude Fabrication de charbon de bois a partir de fours de carbonisation en beton arme, demontables, non polluants, a marche alternative pour le presechage et la carbonisation de produits ligneux
US5485986A (en) * 1991-08-12 1996-01-23 Huls Troisdorf Ag Furnace with in situ foamed insulation and process for its manufacture
EP0640573A1 (fr) * 1993-03-10 1995-03-01 Krosaki Corporation Materiau refractaire calorifuge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 9422, Derwent World Patents Index; AN 1994-181594/22 *

Also Published As

Publication number Publication date
CA2412705A1 (fr) 2001-12-20
US20030155695A1 (en) 2003-08-21
AU2001265821A1 (en) 2001-12-24
DK200000207U3 (da) 2001-09-28

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