EP0699736A1 - Binder zur kalten Brikettierung von feinteiligem Brennstoff, brikettierte Produkte und Verfahren zu ihrer Herstellung - Google Patents

Binder zur kalten Brikettierung von feinteiligem Brennstoff, brikettierte Produkte und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0699736A1
EP0699736A1 EP95401828A EP95401828A EP0699736A1 EP 0699736 A1 EP0699736 A1 EP 0699736A1 EP 95401828 A EP95401828 A EP 95401828A EP 95401828 A EP95401828 A EP 95401828A EP 0699736 A1 EP0699736 A1 EP 0699736A1
Authority
EP
European Patent Office
Prior art keywords
binder
starch
fines
fuel fines
fuel
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
EP95401828A
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English (en)
French (fr)
Inventor
Marius Muller
Jean-Luc Bouliez
Laure Helard
Frédéric Estienne
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.)
SIVIA
Imerys Aluminates SA
Original Assignee
SIVIA
Lafarge Fondu International SA
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 SIVIA, Lafarge Fondu International SA filed Critical SIVIA
Publication of EP0699736A1 publication Critical patent/EP0699736A1/de
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders

Definitions

  • the present invention relates to the agglomeration of fuel fines.
  • the agglomeration of powders, fines or granules is a technique allowing or facilitating their use or recycling.
  • fuel fines there are more particularly the anthracite, vegetable coal and petroleum coke fines agglomerated, alone or in combination.
  • agglomeration processes which allow the formation of balls, briquettes, granules, pellets or other agglomerates and which use binders.
  • the invention particularly relates to cold agglomeration by compression or agitation.
  • thermoplastic compounds such as coal pitches, petroleum bitumens, etc.
  • These binders contain volatile materials, generating fumes when using the coal as fuel. This is the reason why the agglomerates thus obtained are generally subjected to a smoke extraction operation, in an oxidizing atmosphere, the objective of which is to remove volatile materials.
  • this operation is costly and, moreover, deteriorates the mechanical properties of the agglomerates.
  • binders have drawbacks.
  • Thermoplastic binders require large expenditure of thermal energy
  • binders based on molasses and lignosulphite detergent also involve a significant energy expenditure for obtaining agglomerates having good water resistance
  • mineral binders cannot confer good mechanical resistance to the agglomerates that after a relatively long maturing time, the starches give the agglomerates good cohesion during demolding, but are poorly resistant to humidity.
  • the objective of the invention is therefore to provide a binder simultaneously giving the agglomerates good mechanical demolding behavior, good crushing resistance, good weather resistance and an implementation of the agglomeration process in good conditions. economic conditions and making it possible to obtain agglomerates having a completely ecological character. Neither the products used nor the process should present polluting risks.
  • the invention relates to a binder for cold agglomeration of fuel fines which comprises at least one starchy and at least one calcium aluminate.
  • the invention also relates to an agglomerate comprising a binder itself comprising at least one starchy and at least one calcium aluminate.
  • Such an agglomerate preferably comprises 0.5 to 5% of starchy products and 0.5 to 5% of calcium aluminate.
  • the agglomerate can also comprise at least one clay.
  • the agglomerate comprises from 0.5 to 5% of clay.
  • the invention also relates to a method for manufacturing agglomerates of cold fuel fines from said fuel fines with a binder comprising at least one starchy and at least one calcium aluminate.
  • the fuel fines are treated so as to give them a water content of between 6 and 15% when they are mixed with the binder. Furthermore, one can add to the components of the binder, a water-repellent agent. This agent not only improves water resistance, and at the same time prevents water retention.
  • starch products used in the composition of the binder of the invention can belong to any one of the various known families. It could be: * native starches, such as cereal starches (wheat, corn, rice %), tuber starches, in particular potato, cassava starch ...
  • the starchy products can be burst by cooking with live steam in an autoclave according to the so-called "jet cooker” process.
  • This makes it possible to obtain a viscous liquid which is then incorporated into a mixer with the others. components of the binder and the fines to be treated.
  • the calcium aluminates are supplied in the form of calcium aluminate cements, sometimes called simply aluminous cements, which are products obtained by fine grinding of clinker of calcium aluminates.
  • the calcium aluminate clinker is a product consisting mainly of calcium aluminates obtained either by fusion of limestone and bauxite, or by sintering lime (CaO) and alumina (Al2 O3). Calcium aluminates set faster than, for example, Portland cement.
  • Various adjuvants can also be added to the calcium aluminates, in order to facilitate their use and to optimize the setting conditions.
  • Use is preferably made here of an aluminate cement containing from 30 to 80% of alumina, advantageously from 40 to 70% and, for example, from 50 to 60%.
  • the invention relates to the agglomeration of fuel fines with a binary starch / aluminate mixture.
  • the binder used for this purpose generally comprises one or two starch products and one or two calcium aluminates.
  • at least one clay is added to the binder.
  • clays of the smectite family in particular bentonites natural or activated sodium or calcium. Good results have been obtained with bentonites which are a particular type of clay and which form a gel with water.
  • the addition or not of clays to the binder has an influence on the simplicity of the manufacture of the agglomerates and also on the rate of ash during the combustion of the latter.
  • the addition of clays is abandoned, the production of agglomerates is simplified and the ash rate is reduced.
  • a binary binder according to the invention contains more starchy products than a ternary binder according to the invention.
  • Agglomeration processes often involve heating the agglomerates after they have been removed from the mold.
  • the processes which do not include such heating are called cold agglomeration processes here.
  • the raw product 1, stored in the hopper 2, is transmitted by the conveyor belt 3 to the dryer 4. After drying, the fuel fines are transmitted by the screw 5 with a screen 7.
  • the screw 5 is also supplied with the products recovered by the air filtration system 6 and by the residues discharged by the screening belt 22, the role of which will be indicated below.
  • the grinder 8 and the screen 7 make it possible to control the particle size of the products transmitted by the screw 9 and by the elevator 10 to the storage hopper 11. Furthermore, the hoppers 12, 13 and 14 respectively contain clay, starches and calcium aluminate intended for the production of binders.
  • the conveyor 15 supplies these products, together with the fuel fines, carried by the conveyor 16 in the continuous mixer 17.
  • water is also supplied by the circulation 18 and steam by the circulation 19.
  • the assembly is then supplied to a press with tangential wheels 20, subjected to a screening belt 21, possibly recycled by the conveyor 21, and then feeds the conveyor 23 which constitutes the stock of agglomerated products 24.
  • the moisture content of the fuel fines 1 is adjusted and controlled by the dryer 4.
  • These products are duly fragmented by the crusher 8 and, after sieving, are mixed by the mixer 17 with the various components of the binder.
  • the water supply 18 ensures a water content of the fuel fines of between 6 and 15%, and the steam supply 19 allows the native starch to burst. In the event that, upon storage, the fuel fines have the desired humidity level, the drying step can be omitted.
  • the tangent wheel press 20 performs cold agglomeration.
  • the screen conveyor 16 allows the recovery of product waste during agglomeration and its recycling in the process.
  • the mat 23 allows the evacuation of the agglomerates and their storage 24.
  • the balls have the shapes shown, respectively in Figures 2 and 3.
  • 30 and 33 represent the front views, 31 and 34 the side views, 32 and 35 the top views.
  • the ball of about 28 cm3, shown in Figure 2 has a thickness of about 56 mm, a height of about 36 mm, a width of about 24 mm.
  • the ball of about 10 cm3, shown in Figure 3 has a thickness of about 27 mm, a height of about 34 mm, a width of about 18 mm.
  • the agglomerated balls corresponding to those of Figure 2 have a weight of 32 g and are obtained on a KOMAREK tangent wheel press (registered trademark) type DH 400.
  • the agglomerated balls corresponding to those of Figure 3 have a weight of 9 g and are obtained on a KOMAREK tangent wheel press (registered trademark) type B100.
  • thermopesée for example, measured by a Sartorius (Registered trademark) moisture meter on paste, before passing through the press.
  • the fall tests are carried out as follows: 5 balls are launched from a height of 2 meters on a sheet metal plate, 4 consecutive times. We give the number of intact balls after 4 falls.
  • the resistances are expressed in kg.
  • the chipboard is placed between two plates. The lower plate on which the ball rests, rises at constant speed to a predefined height. Resistance is the force opposed by the ball to its crushing.
  • compositions I to III which are embodiments of the invention.
  • Compositions IV to VII are comparative tests.
  • This example concerns 32 g balls obtained on an industrial press ( Figure 2).
  • compositions A to C are embodiments of the invention.
  • Composition D is a comparative test.
  • the water uptake is the percentage of humidity of the balls measured after immersion for 24 hours in water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP95401828A 1994-08-03 1995-08-03 Binder zur kalten Brikettierung von feinteiligem Brennstoff, brikettierte Produkte und Verfahren zu ihrer Herstellung Ceased EP0699736A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409648A FR2723367B1 (fr) 1994-08-03 1994-08-03 Liant pour agglomeration a froid de fines de combustible, agglomere de tels produits et procede de fabrication de tels agglomeres
FR9409648 1994-08-03

Publications (1)

Publication Number Publication Date
EP0699736A1 true EP0699736A1 (de) 1996-03-06

Family

ID=9466048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401828A Ceased EP0699736A1 (de) 1994-08-03 1995-08-03 Binder zur kalten Brikettierung von feinteiligem Brennstoff, brikettierte Produkte und Verfahren zu ihrer Herstellung

Country Status (2)

Country Link
EP (1) EP0699736A1 (de)
FR (1) FR2723367B1 (de)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1303391A (fr) * 1961-10-04 1962-09-07 Procédé de fabrication d'agglomérés fumivores, et les produits obtenus par la mise en oeuvre de ce procédé
EP0010792A1 (de) * 1978-11-02 1980-05-14 Metallgesellschaft Ag Verfahren zum Vergasen feinkörniger Brennstoffe
JPS61130428A (ja) * 1984-11-30 1986-06-18 Nippon Kokan Kk <Nkk> ミニブリケツト製造法
JPS6215293A (ja) * 1985-07-12 1987-01-23 Sintokogio Ltd 粉状固体燃料の固形化方法
JPS62135594A (ja) * 1985-12-07 1987-06-18 Norio Ohashi 成形炭
JPS63196689A (ja) * 1987-02-10 1988-08-15 Nippon Steel Chem Co Ltd 粉コ−クスの成型法
EP0281370A2 (de) * 1987-03-02 1988-09-07 Hickory Specialties, Inc. Brikett für einen elektrischen oder mit Gas betriebenen Rost
EP0314322A2 (de) * 1987-10-28 1989-05-03 Coal Industry (Patents) Limited Verfahren zur Brikettierung
US5221290A (en) * 1991-02-04 1993-06-22 American Colloid Company Charcoal briquettes bound with an organic binder and a water-swellable clay and method
EP0566419A1 (de) * 1992-04-16 1993-10-20 Cpis Limited Verfahren zur Herstellung von Brennstoff aus Abfall und nach diesem Verfahren hergestellter Brennstoff

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1303391A (fr) * 1961-10-04 1962-09-07 Procédé de fabrication d'agglomérés fumivores, et les produits obtenus par la mise en oeuvre de ce procédé
EP0010792A1 (de) * 1978-11-02 1980-05-14 Metallgesellschaft Ag Verfahren zum Vergasen feinkörniger Brennstoffe
JPS61130428A (ja) * 1984-11-30 1986-06-18 Nippon Kokan Kk <Nkk> ミニブリケツト製造法
JPS6215293A (ja) * 1985-07-12 1987-01-23 Sintokogio Ltd 粉状固体燃料の固形化方法
JPS62135594A (ja) * 1985-12-07 1987-06-18 Norio Ohashi 成形炭
JPS63196689A (ja) * 1987-02-10 1988-08-15 Nippon Steel Chem Co Ltd 粉コ−クスの成型法
EP0281370A2 (de) * 1987-03-02 1988-09-07 Hickory Specialties, Inc. Brikett für einen elektrischen oder mit Gas betriebenen Rost
EP0314322A2 (de) * 1987-10-28 1989-05-03 Coal Industry (Patents) Limited Verfahren zur Brikettierung
US5221290A (en) * 1991-02-04 1993-06-22 American Colloid Company Charcoal briquettes bound with an organic binder and a water-swellable clay and method
EP0566419A1 (de) * 1992-04-16 1993-10-20 Cpis Limited Verfahren zur Herstellung von Brennstoff aus Abfall und nach diesem Verfahren hergestellter Brennstoff

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8838, Derwent World Patents Index; AN 88-268345 *
DATABASE WPI Week 8631, Derwent World Patents Index; AN 86-199807 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 192 (C - 429) 19 June 1987 (1987-06-19) *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 365 (C - 460) 27 November 1987 (1987-11-27) *

Also Published As

Publication number Publication date
FR2723367A1 (fr) 1996-02-09
FR2723367B1 (fr) 1996-10-25

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