EP0932485B1 - Verwendung von bearbeitungsmischung zum sägen von gestein - Google Patents

Verwendung von bearbeitungsmischung zum sägen von gestein Download PDF

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Publication number
EP0932485B1
EP0932485B1 EP97938962A EP97938962A EP0932485B1 EP 0932485 B1 EP0932485 B1 EP 0932485B1 EP 97938962 A EP97938962 A EP 97938962A EP 97938962 A EP97938962 A EP 97938962A EP 0932485 B1 EP0932485 B1 EP 0932485B1
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EP
European Patent Office
Prior art keywords
rocks
mixture
rock
use according
sawing
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.)
Expired - Lifetime
Application number
EP97938962A
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English (en)
French (fr)
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EP0932485A1 (de
Inventor
Daniel Wheelabrator Allevard S.A. HUET
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Winoa SA
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Wheelabrator Allevard SA
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Publication of EP0932485A1 publication Critical patent/EP0932485A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/025—Use, recovery or regeneration of abrasive mediums

Definitions

  • the invention relates to operating mixtures sawing as well as the implementation of these mixtures.
  • the invention relates more particularly to sawing hard rocks such as: granite, gneiss, mica schist, pegmatite, and in general, all magmatic, metamorphic, even sedimentary rocks exhibiting significant hardness.
  • the operating mixtures used conventionally for sawing granite include lime mixed with metal shot.
  • This lime is now used to increase the viscosity of the sawing operating mixtures and facilitate the transport of metal shot.
  • Document D2 (EP 653 473) describes a process for cutting or drilling of hollow bodies in concrete, rocks or ceramic, in using a thixotropic coolant intended for cooling cutting or drilling elements.
  • the coolant is composed of water and an agent silicate-based thixotropant.
  • Document D3 mentions a pasty liquid composition, comprising 10% to 80% by weight of a finely divided inorganic solid, and 90% to 15% water or synthetic lubricants.
  • This composition serves as a cutting fluid or drilling hard materials, more particularly reinforced concrete.
  • the solid contains chalk or talc, and the lubricant is mineral oil, or paraffin mixed in 65% to 95% water.
  • the mixture can comprise from 2% to 10% petroleum or paraffin wax, 2% to 8% silica, 1% to 6% metallic particles, from 1% to 10% of a thickener and from 0.1% to 4% of a emulsifier.
  • the cutting fluid makes it possible to increase the working speed, and the duration of tool life.
  • An object of the invention is therefore to provide operating mixtures for sawing hard rocks such as granite which are devoid of lime.
  • a more particular subject of the invention is the use of a mixture thixotropic procedure for sawing rocks according to the appended claims.
  • the sawing operating mixtures of the invention surprisingly improve sawing efficiency.
  • the productivity of a multi-blade frame machine is in particular greatly improved.
  • thixotropy qualified the property of a body to transform itself reversibly and gradually from the gel state to the fluid state.
  • thixotropy is used here in a sense more general.
  • any body whose apparent viscosity tends to decrease in time when we apply a constant stress or shear rate is said thixotropic; provided that after removing this stress or this shear rate and after a sufficient rest time, its initial structure is regenerates. And this, that this initial structure is a gel or not.
  • thixotropic compound is a gel
  • it is reversible, that is to say that to liquefy it, a simple mechanical stirring is sufficient.
  • Some nail polish, lipsticks, some oily solutions, some derivatives of cellulose are thixotropic in the defined sense previously.
  • this mixture itself is thixotropic.
  • At least one of the thixotropic compounds is a clay mineral chosen from the group comprising: kaolinite, berthierine, amesite, chrysolite, illites and vermiculites, chlorites, smectites, pyrophyllites, talc, interbedded clay minerals.
  • At least one of the thixotropic compounds is a powder of argillaceous rocks consisting essentially of a mixture of minerals clayey chosen from the group comprising: kaolinite, berthierine, amesite, chrysolite, illites and vermiculites, chlorites, smectites, pyrophyllites, talc, clay minerals interstratified.
  • Bentonites are clay minerals of the group montmorillonites.
  • the bentonite used can be of original natural.
  • It can be a calcium bentonite.
  • the bentonite used can also be a activated calcium bentonite, rendered sodium by treatment chemical.
  • the bentonite used can also be a bentonite treated with an organic dopant such as derivatives cellulosics, acrylic acid or derivatives thereof.
  • the compound making it possible to fix the pH of the operating sawing mixture is sodium carbonate Na 2 CO 3 .
  • the metal hydroxides contained in the mixture in one embodiment of the mixture, have a chemical composition of the type: Li m D d T (OH) (m + 2d + 3 + na) A
  • m is the number of Li ions, between 0 and 1.
  • D represents divalent metal ions
  • d is the number of D ions, between 0 and 4
  • T represents the trivalent metal ions
  • A represents the monovalent or polyvalent anions of valence n, other than OH -
  • a is the number of A anions, (m + 2d + 3 + na) being greater than or equal to 3.
  • the operating mixture can comprise a polymer reversibly changing from the gel state to the fluid when it undergoes a stress or a velocity of shear.
  • the various constituents of the mixture can be mixed in water.
  • the invention also relates to the application of sawing operating mixtures presented above in sawing of a hard rock selected from the group comprising metamorphic rocks, igneous rocks and sedimentary rocks of significant hardness such than slates, slate shales, carbonate rocks, siliceous rocks.
  • the rock to sawn is formed mainly of quartz, feldspar alkaline, plagioclase, mica and amphibole and are among the granitoids.
  • the rock to be sawn can be an ornamental granitoid chosen from the group comprising: granites porphyroids, pegmatites, saccharoid granites, fine-grained granites.
  • Figure 1 is a schematic rheogram of a sawing operating mixture according to the invention, this rheogram being compared to theoretical behaviors of fluids.
  • the operating mixtures obtained according to the invention are shear thinners and thixotropic.
  • Figure 1 shows part of a rheogram 1 of an operating mixture according to the invention.
  • the BINGHAM bodies behave like mewtonian liquids.
  • the viscosity plastic ⁇ is a constant corresponding to the slope of the theoretical rheogram.
  • ⁇ c is also a constant (yield point or yield value) corresponding to the ordinate at the origin of the theoretical rheogram.
  • the viscosity of the operating fluid has been measured using a FANN-type viscometer, in the examples shown below.
  • the FANN rheometer is two-speed.
  • rheometers can be used, in particularly rheometers of the cone-plate type, rheometers with forced oscillations.
  • Plate cone type rheometers are sometimes considered preferable for the characterization of liquids thixotropic or antithixotropic, because it is considered that, in this type of rheometer, the mechanical history is the same for all layers of the material tested.
  • cylindrical rheometers for the study of thixotropic mixtures of the invention requires very narrow air gaps, difficult to manufacture with precision.
  • coaxial cylindrical rheometers make it possible to eliminate the effects of thermalization and ensure a constant thermal environment.
  • the FANN rheometer makes it possible to determine the flow threshold ⁇ c , the plastic viscosity ⁇ which can be related to the theoretical model of BINGHAM.
  • the FANN rheometer can also be used to determine the stress from which the freezing effect disappears, if necessary.
  • this rheometer is not used to characterize a working mixture containing shot.
  • Means of separation for example magnetic, are used to separate the shot a sample of the operating mixture which is to be determine the rheological characteristics presented above.
  • Rhodopol (registered trademark) is a polymer based xanthan.
  • the conventional Anglo-Saxon unit lbf.pd 2 can be converted into a unit of the international system by taking into account the following correspondence: 1 lbf. pd 2 ⁇ 47.88 Pa ⁇ 47.88 N / m 2
  • the mixture regains its fluid appearance after a vigorous shaking that cannot be achieved by hand but requires a mechanical stirrer, as a test after eight days' rest has shown it.
  • This mixture is based on the interaction of bentonite and Polyvis (registered trademark).
  • Bentonite is a montmorillonite, that is to say a clay mineral belonging to the smectite group.
  • Clay minerals such as bentonite are used as thixotropic thickeners, in particular for household detergents.
  • the Polyvis product is described therein as a composition containing mixed metal hydroxides of the MgAlOH 4.7 Cl 0.3 type .
  • m corresponds to the number of Li ions, between 0 and approximately 1
  • D denotes divalent metal ions
  • d denotes the number of divalent metal ions
  • T represents the trivalent metal ions
  • A represents monovalent or polyvalent anions of valence n other than OH - ; a being the number of A anions; and m + 2d + 3 + na being equal to or greater than 3.
  • the Polyvis product is incorporated into a rich mud in bentonite in the field of drilling, in particular drilling oil tanker, to quickly cement the borehole walls, the cement obtained acquiring mechanical resistance important in a short time, the objective being, in in particular, to avoid the inflow of water into the drilling.
  • clay minerals of the smectite group such as beidellite, saponite, stevensite and nontronite can be considered.
  • Clay minerals belonging to the group of chlorites, illites and vermiculites or even group of pyrophyllites and talc can be considered just like attapulgite, sepiolite.
  • any composition comprising at least one clay mineral and an amount more or less important of Polyvis making it possible to obtain the rheological properties presented above fit within the scope of the invention.
  • the sawing operating mixtures of the invention do not necessarily contain lime.
  • Mechanical agitation by mechanical stirring, gas or air injection, wall vibration or ultrasound allows an easy restart of a sawing installation, even after a prolonged shutdown.
  • the thixotropy of the operating mixture can be maintained, even with large amounts of rock or steel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Lubricants (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Sawing (AREA)
  • Disintegrating Or Milling (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (8)

  1. Verwendung eines thixotropen Bearbeitungsgemischs für das Zersägen von Gestein, dadurch gekennzeichnet, dass das Bearbeitungsgemisch umfasst:
    eine thixotrope Verbindung, die ein Tonmineral oder ein Tonsteinmehl umfasst, das im Wesentlichen aus einem Tonmineraliengemisch besteht, wobei die Tonminerale aus der aus Kaolinit, Berthierin, Amesit, Chrysolit, Illite und Vermiculite, Chlorite, Smektite, Pyrophyllite, Talk und in Wechselschichten angeordneten Tonmineralien gebildeten Gruppe gewählt sind,
    ein graupiges, abrasives Material, das aus der aus Metallen und Metalllegierungen gebildeten Gruppe gewählt ist, insbesondere Kohlenstoffstahlkies mit einer Härte, die der durchschnittlichen Härte des zu sägenden Gesteins entspricht oder größer ist als diese,
    eine Verbindung, die dazu bestimmt ist, einen vorbestimmten basischen pH-Wert für das Bearbeitungsgemisch zu bestimmen,
    gemischte Metallhydroxyde,
    wobei das graupige, abrasive Material in dem Gemisch als Schwebestoff bleibt, und zwar ohne Sedimentierungswirkung, solange kein mechanisches Schütteln erfolgt.
  2. Verwendung nach Anspruch 1, dadurch gekennzeichnet, dass das Bearbeitungsgemisch Bentonit enthält.
  3. Verwendung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Verbindung, die eine Bestimmung des pH-Werts des Gemischs auf einen vorbestimmten Wert erlaubt, Natriumkarbonat Na2CO3 ist.
  4. Verwendung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die gemischten Metallhydroxyde eine chemische Zusammensetzung folgender Art aufweisen: LimDdT (OH-) (m+2d+3+na) Aa n, wobei m die Anzahl der Li-lonen von 0 bis 1 ist,
    D die zweiwertigen Metallionen darstellt,
    d die Anzahl der lonen D von 0 bis 4 ist,
    T die dreiwertigen Metallionen darstellt,
    A die mono- oder polyvalenten lonen der Valenz n darstellt, die nicht (OH-) sind,
    a die Anzahl Anionen A ist,
    (m+2d+3+na) größer oder gleich 3 ist.
  5. Verwendung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Bearbeitungsgemisch ein Polymer einschließt, das reversibel aus einem gelförmigen in einen flüssigen Zustand übergeht, wenn auf ihn ein Druck oder eine Schergeschwindigkeit ausgeübt wird.
  6. Verwendung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das zu sägende Gestein ein hartes Gestein ist, das aus der aus metamorphen, magmatischen und sedimentären Gesteinen großer Härte gebildeten Gruppe ausgewählt ist, wie Schiefer, hartem Schiefer, mit Kohlensäure gesättigtem Gestein, Silikatgestein.
  7. Verwendung nach Anspruch 6, dadurch gekennzeichnet, dass das zu sägende Gestein im Wesentlichen aus Quarz, alkalischem Feldspat, Plagioklas, Mika und Amphibol gebildet wird und zu den granitartig aussehenden Gesteinen gehört.
  8. Verwendung nach Anspruch 7, dadurch gekennzeichnet, dass das zu sägende Gestein ein granitartig aussehender Schmuckstein ist, der aus der aus Porphyroid-Graniten, Pegmatiten, zuckerkörnigen Graniten und feinkörnigen Graniten gebildeten Gruppe ausgewählt ist.
EP97938962A 1996-09-27 1997-08-29 Verwendung von bearbeitungsmischung zum sägen von gestein Expired - Lifetime EP0932485B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9611814 1996-09-27
FR9611814A FR2753913B1 (fr) 1996-09-27 1996-09-27 Melanges operatoires de sciage de roches et mise en oeuvre de ces melanges
PCT/FR1997/001538 WO1998013180A1 (fr) 1996-09-27 1997-08-29 Melanges operatoires de sciage de roches et mise en oeuvre de ces melanges

Publications (2)

Publication Number Publication Date
EP0932485A1 EP0932485A1 (de) 1999-08-04
EP0932485B1 true EP0932485B1 (de) 2003-11-12

Family

ID=9496132

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Application Number Title Priority Date Filing Date
EP97938962A Expired - Lifetime EP0932485B1 (de) 1996-09-27 1997-08-29 Verwendung von bearbeitungsmischung zum sägen von gestein

Country Status (7)

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EP (1) EP0932485B1 (de)
AR (1) AR009367A1 (de)
AU (1) AU4121797A (de)
BR (1) BR9711574A (de)
FR (1) FR2753913B1 (de)
SA (1) SA98190175A (de)
WO (1) WO1998013180A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050483A1 (de) * 2007-10-19 2009-09-10 Meyer Burger Ag Mischung aus einem thixotropen Dispersionsmedium sowie abrasiv wirkenden Körnern als Schleifmittel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB383282A (en) * 1931-04-09 1932-11-09 George Francis Atyeo Improvements in and relating to the cutting, grinding or other treatment of stone and such like material where ball shot or like abrasive material is employed
IL79304A (en) * 1985-07-05 1990-07-12 Dow Chemical Co Mixed metal hydroxides for thickening water or hydrophilic fluids
DE3742572A1 (de) * 1987-12-16 1989-07-06 Hilti Ag Bohr- und schneidmittel fuer gestein
DE4338544C1 (de) * 1993-11-11 1995-06-22 Walter H Maria Wiemeler Verfahren zum Bohren oder Sägen von Durchbrechungen in Hohlraumdecken oder -wänden

Also Published As

Publication number Publication date
WO1998013180A1 (fr) 1998-04-02
AR009367A1 (es) 2000-04-12
FR2753913B1 (fr) 1999-10-15
EP0932485A1 (de) 1999-08-04
SA98190175A (ar) 2005-12-03
BR9711574A (pt) 2000-01-18
AU4121797A (en) 1998-04-17
FR2753913A1 (fr) 1998-04-03

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