EP0862605A1 - Fabrication de briquettes de fines minerales - Google Patents

Fabrication de briquettes de fines minerales

Info

Publication number
EP0862605A1
EP0862605A1 EP96933531A EP96933531A EP0862605A1 EP 0862605 A1 EP0862605 A1 EP 0862605A1 EP 96933531 A EP96933531 A EP 96933531A EP 96933531 A EP96933531 A EP 96933531A EP 0862605 A1 EP0862605 A1 EP 0862605A1
Authority
EP
European Patent Office
Prior art keywords
binder
fines
resin
ester
oxyanion
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
EP96933531A
Other languages
German (de)
English (en)
Inventor
Raymond Yates
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.)
Ashland UK Ltd
Ashland Inc
Original Assignee
Ashland UK Ltd
Ashland Inc
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 Ashland UK Ltd, Ashland Inc filed Critical Ashland UK Ltd
Publication of EP0862605A1 publication Critical patent/EP0862605A1/fr
Ceased legal-status Critical Current

Links

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
    • C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders

Definitions

  • This invention relates to the briquetting of mineral fines such as coal fines.
  • a variety of techniques are known for producing agglomerated structures such as briquettes or tablets from coal fines.
  • the most popular method is to form ovoid shapes by a cold roll-press operation.
  • the coal fines mixed with a binder are squeezed, at pressures of up to about 2.1 x IO 6 kg/m 2 ) (3000 psi) , between two metal rolls each having half-ovoid depressions.
  • the briquettes so formed fall from the press on to a conveyor belt for transfer to storage and subsequent packaging.
  • binder Several types have been used in this process with varying degrees of success. For example, sodium silicate gives moderately strong briquettes, but has poor water resistance and because of increased ash content reduces the fuel value of the coal. Binders such as bitumen and sulphite lye result in the emission of fumes and smoke from the burning briquette which is clearly undesirable.
  • ester-cured alkaline phenol-formaldehyde resole resin is known to give moderately strong briquettes with good burning properties and US Patent No. 4802890 is an example.
  • a green strength additive commonly a starch
  • Starch is susceptible to bacterial/fungal attack and therefore must be used with a biocide or fungicide.
  • the inclusion of starch can detract from the strength achievable from the phenolic resin. From the mechanics of the operation, this system is also complex because of the need for four components.
  • an ambient temperature curing binder for agglomerating mineral fines, comprises an alkaline resole phenol-formaldehyde resin, an ester co-reactant and an oxyanion to enhance green strength.
  • agglomerating a mineral fine in which the fine is bound into larger agglomerates by a binder comprising an alkaline phenol- formaldehyde, an ester co-reactant and an oxyanion to enhance green strength.
  • the binder may be supplied as a briquetting binder system for binding mineral fines at ambient temperatures comprising as separate components : (a) an alkaline resole phenol-formaldehyde resin;
  • This system may have an indication that the resulting binder is useful for briquetting mineral fines such as coal. It may be supplied with the components in separate containers which may be of a relative size such that many of the contents of the containers with the fines will provide a resulting mixture where the components are in the desired relative proportions.
  • the briquettes resulting from the invention are not susceptible to mould and bacterial growth. Therefore, they do not need to include a bactericide or fungicide yet still remain bright and clear of mould on storage.
  • the alkaline resole phenol-formaldehyde resin may, for example, be one prepared by reacting a monohydric phenol such as phenol or a cresol, or a dihydric phenol such as resorcinol, with formaldehyde under alkaline conditions.
  • a monohydric phenol such as phenol or a cresol
  • a dihydric phenol such as resorcinol
  • formaldehyde under alkaline conditions.
  • the molar ratio of the monohydric or dihydric phenol to formaldehyde can be from 1:1 to 1:3, but the preferred range is 1:1.6 to 1:2.0.
  • alkali as a solid or an aqueous solution. Hydroxides of calcium, sodium and potassium may be used, but the latter is preferred.
  • the amount of solid alkali added can be from 8 to 18%, more preferably 12 to 18%, by weight of the resin, though the most preferred range is 11 to 15% by weight of the resin.
  • the ester co-reactant may, for example, be the acetic acid esters of ethylene glycol, propylene glycol, butylene glycol and glycerol, lactones such as propriolactone and gammabutyrolactone, and carbonate esters such as propylene carbonate and blends of ethylene/propylene carbonates. Mixtures of these esters may also be used.
  • Suitable oxyanions are borate, aluminate and stannate, although borate is preferred.
  • the oxyanion can be present in the form of a salt such as the potassium or sodium salt.
  • the amount of alkaline phenol-formaldehyde resin to be added to the fines such as coal will normally be 1 to 6% by weight of the fines with the quantity of ester curing agent being 15 to 25% by weight based on the weight of resin.
  • the oxyanion which can conveniently be added as a 5% aqueous solution, will usually be added in an amount of 1 to 6% by weight based on the fines. These amounts are generally higher than the amounts which would be needed for larger sized particles than fines.
  • the preferred order of addition to the mineral fines is to add the oxyanion first, then the ester and finally the resin, allowing time between each addition to disperse the component in the mixture.
  • the binding will take place at ambient temperatures and so no separate heating of the components is required.
  • little or no change is required to the cold roll-press operation other than the use of a binder according to the invention in place of traditional binders such as sodium silicate and normally the coal fines will be in the form of a damp mixture to avoid dust problems .
  • the agglomeration process of the invention can be used with other types of fines such as carbon and graphite, and with other minerals such as quartz, calcium silicate and alumino-silicate. Mixtures of fines such as mixtures of various carbon based fines and silica fines are also possible.
  • the coal and other fines will normally have a maximum size of such that they will pass a mesh of 5 millimetre square aperture, and preferably a mesh of 3 millimetre square aperture.
  • the fines will therefore contain a range of particle sizes up to the maximum noted above. More preferably the fines are of a maximum size range of from 150 to 200 mesh.
  • silane to assist in bonding between the binder and the mineral and a particular example is quartz.
  • the silane if present, is preferably added in an amount of from 0.1 to 1.0% by weight of the resin.
  • the invention can be illustrated by the -allowing Example.
  • a resole phenol-formaldehyde resin ⁇ > . prepared by reacting, under mild alkaline conditions, 450 g of phenol and 270 g of 91% paraformaldehyde in the presence of 351 g of water for 15 minutes at 100 C. After cooling to 80 C, 93 g of potassium hydroxide
  • a coal fines mixture comprising 70% anthracite, 20% petrocoke and 10% bituminous with an overall moisture content of 8.5% were mixed with 3% by weight of a 5% aqueous solution of sodium tetraborate followed by 1% by weight of an ester comprising equal parts of triacetin and gamma-butyrolactone.
  • the resin as prepared above was then added at 4% by weight based on the fines and dispersed for 1 minute.

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)
  • Phenolic Resins Or Amino Resins (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Glanulating (AREA)

Abstract

On agglomère des fines minérales, du type fines de charbon, en briquettes et en plaques, au moyen d'une opération de laminage à froid et en utilisant comme liant une résine résol phénol-formaldéhyde alcaline durcie par un ester et associée à un oxyanion permettant de renforcer la résistance à l'état vert.
EP96933531A 1995-10-11 1996-10-10 Fabrication de briquettes de fines minerales Ceased EP0862605A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9520818 1995-10-11
GBGB9520818.7A GB9520818D0 (en) 1995-10-11 1995-10-11 Briquetting of mineral fines
PCT/GB1996/002479 WO1997013827A1 (fr) 1995-10-11 1996-10-10 Fabrication de briquettes de fines minerales

Publications (1)

Publication Number Publication Date
EP0862605A1 true EP0862605A1 (fr) 1998-09-09

Family

ID=10782149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96933531A Ceased EP0862605A1 (fr) 1995-10-11 1996-10-10 Fabrication de briquettes de fines minerales

Country Status (8)

Country Link
EP (1) EP0862605A1 (fr)
CN (1) CN1201482A (fr)
AU (1) AU7223096A (fr)
BR (1) BR9610890A (fr)
CA (1) CA2234705A1 (fr)
GB (1) GB9520818D0 (fr)
PL (1) PL326250A1 (fr)
WO (1) WO1997013827A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2467060C1 (ru) * 2011-04-19 2012-11-20 Татьяна Викторовна Шевченко Комплексное связующее для получения угольных брикетов
RU2467059C1 (ru) * 2011-04-19 2012-11-20 Татьяна Викторовна Шевченко Смолистое связующее для получения угольных брикетов

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2330150B (en) * 1997-10-13 2001-11-14 Applied Ind Materials Uk Ltd Process for the agglomeration of petroleum coke fines
GB9826226D0 (en) * 1998-12-01 1999-01-20 Borden Chem Co Ltd Briquetting of powdered fuel
GB9914537D0 (en) * 1999-06-23 1999-08-25 Borden Chem Co Ltd Fuel briquetting composition and manufacture of fuel briquettes using it
US8333909B2 (en) 2003-04-09 2012-12-18 Bac2 Limited Conductive polymer, conductive polymer compositions and methods for their use
WO2004091015A1 (fr) * 2003-04-09 2004-10-21 Graham Simpson Murray Polymere conducteur, compositions a base de polymeres conducteurs et leur utilisation
GB0308135D0 (en) * 2003-04-09 2003-05-14 Bac2 Ltd Solid polymer electrolyte
GB201613915D0 (en) * 2016-08-15 2016-09-28 Binding Solutions Ltd Briquettes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1033255A1 (ru) * 1982-03-25 1983-08-07 Липецкий политехнический институт Смесь дл изготовлени литейных керамических форм и стержней
GB8404595D0 (en) * 1984-02-22 1984-03-28 Foseco Int Foundry sand compositions
GB8608488D0 (en) * 1986-04-08 1986-05-14 Foseco Int Agglomeration of coal fines
AU605943B2 (en) * 1987-12-24 1991-01-24 Foseco International Limited Production of articles of bonded particulate material and binder compositions for use therein
GB2282387A (en) * 1993-09-07 1995-04-05 Hepworth Minerals & Chemicals Briquette and preparation of same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9713827A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2467060C1 (ru) * 2011-04-19 2012-11-20 Татьяна Викторовна Шевченко Комплексное связующее для получения угольных брикетов
RU2467059C1 (ru) * 2011-04-19 2012-11-20 Татьяна Викторовна Шевченко Смолистое связующее для получения угольных брикетов

Also Published As

Publication number Publication date
GB9520818D0 (en) 1995-12-13
WO1997013827A1 (fr) 1997-04-17
MX9802789A (es) 1998-09-30
PL326250A1 (en) 1998-08-31
BR9610890A (pt) 1999-12-21
AU7223096A (en) 1997-04-30
CN1201482A (zh) 1998-12-09
CA2234705A1 (fr) 1997-04-17

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