EP3204340A1 - Adjuvant pour le broyage dans des broyeurs à cylindres - Google Patents

Adjuvant pour le broyage dans des broyeurs à cylindres

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Publication number
EP3204340A1
EP3204340A1 EP15775678.4A EP15775678A EP3204340A1 EP 3204340 A1 EP3204340 A1 EP 3204340A1 EP 15775678 A EP15775678 A EP 15775678A EP 3204340 A1 EP3204340 A1 EP 3204340A1
Authority
EP
European Patent Office
Prior art keywords
glycol
grinding
glycol compound
solid
compound
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.)
Withdrawn
Application number
EP15775678.4A
Other languages
German (de)
English (en)
Inventor
Thomas Müller
Matthias Dietrich
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.)
Sika Technology AG
Original Assignee
Sika Technology AG
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 Sika Technology AG filed Critical Sika Technology AG
Publication of EP3204340A1 publication Critical patent/EP3204340A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/02—Alcohols; Phenols; Ethers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/48—Clinker treatment
    • C04B7/52—Grinding ; After-treatment of ground cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/52—Grinding aids; Additives added during grinding
    • 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

Definitions

  • the invention relates to the use of at least one glycol compound as a grinding aid when grinding a solid, in particular an inorganic and / or mineral solid.
  • the invention relates to compositions containing glycol compounds and to a method for grinding a solid.
  • a central step and a major cost factor in the production of mineral binders, in particular cement, is the grinding of the coarse-grained mineral components into fine powder.
  • additives such as, for example, cement
  • cement and additives can basically be ground together or separately.
  • the fineness of the mineral binder is an important quality feature.
  • hardened mortar or concrete mixtures with finely ground mineral binders generally have higher compressive strengths than corresponding mixtures based on coarser-milled mineral binders.
  • grinding aids In order to facilitate the comminution of mineral binders in mills and to prevent the agglomeration of the resulting powdery particles, so-called grinding aids can be used. They cause a strong reduction of the energy required for grinding energy.
  • organic substances have been used since the 1960s. gives, in particular glycols and amino alcohols, and mixtures thereof. They are added in quantities of up to about 0.1%, based on the millbase, together with this of the cement mill.
  • the throughput of the mill can be increased by 20 to 30%, in some systems even by up to 50%.
  • No. 5,084,103 (David F. Myers, WR Grace & Co.) describes, for example, milling aids based on higher trialkanolamines such as triisopropanolamine, N, N-bis (2-hydroxyethyl) -N-2-hydroxypropyl) amine and tris (2-hydroxybutyl) amine.
  • the additive is intended to improve the grinding process in a roller mill.
  • the additive should be usable as a grinding aid and to increase the grinding efficiency or production efficiency when grinding solids, in particular mineral binders, in roller mills.
  • the object according to the invention can be achieved by using at least one glycol compound as grinding aid when grinding at least one solid, in particular an inorganic and / or mineral solid, in one Roller mill, wherein the at least one glycol compound has a structure according to formula I.
  • glycol compounds used according to the invention lead to a significant reduction of vibrations in roller mills and moreover bring about a stabilization of the grinding bed.
  • the glycol compounds can be used as additives in the milling of different mineral binders.
  • These may in particular be cementitious binders such as e.g. various types of cement (CEM I, CEM II, CEM III, CEM IV, CEM V, so-called "green cements” and Belit cement) for transport, site, Fertigteil- and shotcrete, and mortar applications such as repair mortar, Grouts, sprayed mortar or the like be.
  • cementitious binders such as e.g. various types of cement (CEM I, CEM II, CEM III, CEM IV, CEM V, so-called "green cements” and Belit cement) for transport, site, Fertigteil- and shotcrete, and mortar applications such as repair mortar, Grouts, sprayed mortar or the like be.
  • CEM I, CEM II, CEM III, CEM IV, CEM V so-called "green cements” and Belit cement
  • the processability of the mineral binders is hardly or not negatively influenced
  • glycol compounds according to the invention are also compatible with a large number of other common additives and process chemicals which are used in the milling of solids.
  • the glycol compounds are thus flexible in the grinding of solids.
  • a first aspect of the present invention relates to the use of at least one glycol compound as grinding aid in the milling of at least one solid, in particular an inorganic and / or mineral solid, in a roller mill, wherein the at least one glycol compound has a structure according to formula I:
  • R 1 , R 2 , R 3 each independently of one another are H or an alkyl, alkoxy or alkanol group having 1-8 carbon atoms, in particular having 2-4 carbon atoms; and b) X is a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, more preferably 1 to 4 carbon atoms.
  • milling or “grinding process” is understood in particular to mean a process in which an average particle size of a solid or of a mixture of different solids is reduced. This takes place here in a roller mill when grinding clinker, optionally together with inert and / or active additives, such as with gypsum, anhydrite, a-hemihydrate, ß-hemihydrate, latent hydraulic binders, pozzolanic binders and / or inert fillers.
  • inert and / or active additives such as with gypsum, anhydrite, a-hemihydrate, ß-hemihydrate, latent hydraulic binders, pozzolanic binders and / or inert fillers.
  • the solid or the mixture of various solids, in particular a mineral binder during milling to a Blaine value of at least 500 cm 2 / g, in particular at least 1 ⁇ 00 cm 2 / g, preferably at least 1 '500 cm 2 / g, even more preferably at least 2 ⁇ 00 cm 2 / g, ground.
  • the milling process or the grinding of the solid takes place in particular at temperatures below 300 ° C., preferably below 250 ° C., more preferably below 150 ° C. Particularly preferred temperatures are between 30 - 150 ° C, in particular 60 - 120 ° C.
  • the solid is an inorganic substance for construction purposes, for example as a constituent for cement, mortar and / or concrete compositions
  • the solid is a mineral binder and / or
  • the solid may be present in coarse form, eg as (un-milled) clinker, and / or already partly ground.
  • a “mineral binder” is in particular a binder, in particular an inorganic binder, which reacts in the presence of water in a hydration reaction to solid hydrates or hydrate phases.
  • This may be, for example, a hydraulic binder (e.g., cement or hydraulic lime), a latent hydraulic binder (e.g., slag or blastfurnace slag), a pozzolanic binder (e.g., fly ash, trass or rice husk ash) and / or a non-hydraulic binder (gypsum or whitewash). It is also possible to mix the various binders.
  • An "additive for a mineral binder” is, for example, an inert mineral substance such as e.g. Limestone, quartz powder and / or pigments.
  • a "cementitious binder” is in particular a binder or a binder composition in an amount of at least 5% by weight, in particular at least 20% by weight, preferably at least 35% by weight, in particular at least 65% by weight. Cement clinker understood.
  • a “roller mill” is a mill in which at least one milling tool is arranged on a substantially horizontally rotatable grinding plate or grinding bowl unrollable.
  • the term “roller mill” in the present case also includes “roller mills”, “vertical mills” and “vertical roller mills”.
  • a grinding tool for example, a cylindrical, conical or ball i- a roller, a roller or a ball can be used. These are rotatably mounted in particular via special holding devices.
  • the material to be ground When grinding in the roller mill, the material to be ground is placed on the grinding plate, where it passes between the grinding plate and the grinding tool and is thereby comminuted. In roller mills, the comminution of the ground material thus takes place by rolling over the grinding tool.
  • the millbase is placed in particular centrally from above on the refining plate and conveyed for example by centrifugal forces in the field of grinding tools.
  • the ground material to be ground can be conveyed over a peripheral region of the grinding plate and from there transported away, for example, with an air stream, e.g. to a sifter.
  • the contact pressure of the grinding tools on the material to be ground can be determined by the gravity of the grinding tools or by additional pressure, e.g. hydropneumatic, generated or regulated.
  • additional pressure e.g. hydropneumatic
  • roller mills There are various designs of roller mills.
  • the roller mill is a Loesche roller mill, a ball mill, a Raymond roller mill, an MPS roller mill or a Polysius roller mill.
  • Such mills are described in detail in the "Cement Data Handbook” (Walter H. Duda), Volume 1, International Process Techniques of the Cement Industry, 3rd Edition, Bauverlag GmbH (Wiesbaden and Berlin).
  • Roller mills are not to be confused with grinding media mills, e.g. Ball mills.
  • grinding media millbases and freely moving media are circulated in a process chamber. This results in shocks between the grinding media, the walls of the process chamber and the regrind. The comminution of the ground material takes place in particular by fragmentation and not by a rollover process.
  • Downstream of the roller mill is in particular a device for the size separation of solid particles, such as, for example, an air classifier, centrifugal compactors, gravity separators, measuring cyclone, beam deflecting classifier, impactor or planifier.
  • a device for the size separation of solid particles such as, for example, an air classifier, centrifugal compactors, gravity separators, measuring cyclone, beam deflecting classifier, impactor or planifier.
  • the sifter is inside the mill housing.
  • the solid particles are based on the ratio of flow resistance, gravity and / or centrifugal force in a gas stream separated.
  • the at least one glycol compound is used as a grinding aid for improving the grinding efficiency when grinding a mineral substance, in particular when grinding a mineral binder.
  • the glycol compounds have proved to be particularly suitable as grinding aids in the milling of cementitious binders or cement clinkers.
  • the at least one glycol compound in particular causes an increase in the production capacity of the roller mill and / or an increase in the fineness of grinding.
  • the inventive glycol compounds can be used to achieve increased grinding efficiency and / or production performance when grinding solids. This is especially true for mineral binders, especially cementitious binders. At the same dosage can be obtained with the glycol compounds when grinding solids, especially mineral substances, thus a much finer powder with a significantly larger specific surface or Blainewert larger. In addition, the screen residue can be significantly reduced.
  • the at least one glycol compound may also preferably be used for vibration or vibration reduction of the roller mill.
  • the at least one glycol compound can also be advantageously used to stabilize the mill bed of the roller mill.
  • vibrations occur in particular when the material to be ground is distributed unevenly on the grinding plate, unusually hard impurities reach the grinding plate or there is too large an amount of ground material.
  • the "grinding bed” is understood to mean the ground material lying on the grinding plate.
  • glycol compounds according to the invention can significantly reduce unwanted vibrations during operation of the roller mill. This comes as a surprise, since other grinding aids z.T. Although they improve production performance or milling efficiency, they do not significantly reduce mill vibration.
  • the inventive glycol compounds are able to stabilize the grinding bed.
  • Stabilization of the grinding bed means in particular an optimization of the grinding material distribution or of the grinding bed on the grinding plate, so that an optimal grinding effect is achieved. This helps to reduce unwanted vibration.
  • water has been used for this purpose.
  • this has the disadvantage, in particular in the grinding of hydraulic or cementitious binders, that part of the millbase reacts with the water during the grinding to form hydrate phases and no longer functions as a settable hydraulic or cementitious binder.
  • a glycol compound according to the invention it is possible to reduce or completely adjust the water injection required for the grinding bed stabilization. As a result, a quality improvement of the ground material can be achieved. This in particular without the risk of hydration reactions in hydraulic or cementitious binders. This directly improves the material properties of the solid.
  • the pack-set index according to standard ASTM C1565: 2009 can be improved. Accordingly, the glycol compounds of the present invention can be specifically used for this purpose. It is also possible to use the at least one glycol compound at the same time as a grinding aid and as an aid for improving the material properties of the solid. This particular with cementitious binders.
  • the use of the at least one glycol compound is particularly advantageous when the solid comprises or consists of a hydraulic binder, preferably cement and / or cement clinker.
  • a cement having a cement clinker content of> 35 wt .-% is particularly preferred.
  • the cement is of the type CEM I, CEM II and / or CEM INA (according to standard EN 197-1).
  • a proportion of the hydraulic binder in the total solids is advantageously at least 5% by weight, in particular at least 20% by weight, preferably at least 35% by weight, in particular at least 65% by weight.
  • the solid consists of> 95 wt .-% of hydraulic binder, in particular cement clinker.
  • the solid contains or consists of other binders.
  • these are in particular latent hydraulic binders and / or pozzolanic binders.
  • Suitable latent hydraulic and / or pozzolanic binders are e.g. Slag and / or fly ash.
  • the solid contains from 5 to 95% by weight, in particular from 5 to 65% by weight, particularly preferably from 15 to 35% by weight, of latently hydraulic and / or pozzolanic binders.
  • Also possible are> 95 wt .-% latent hydraulic and / or pozzolanic binder in the solid.
  • the glycol compound may also be used in the milling of inert solids, e.g. mineral substances, in particular limestone meal, quartz powder and / or pigments are used.
  • inert solids e.g. mineral substances, in particular limestone meal, quartz powder and / or pigments are used.
  • the glycol compound with solids which comprise a mixture of a hydraulic binder, in particular cement clinker, and a latent hydraulic and / or pozzolanic binder, preferably slag and / or fly ash.
  • the proportion of the latent-hydraulic and / or pozzolanic binder is in particular from 5 to 95% by weight, particularly preferably from 5 to 65% by weight, in particular particular preferably 15-35 wt .-%, while at least 35 wt .-%, in particular at least 65 wt .-%, of the hydraulic binder present.
  • an inert substance, eg limestone may additionally be present in the mixture.
  • Such mixtures can be used after grinding, for example as binder components in mortar and concrete mixtures.
  • the glycol compound is added to the solid before and / or during a milling process of the solid. In a preferred embodiment, the addition takes place before the milling process.
  • the glycol compound may e.g. as a pure substance, in particular with a purity of> 95 wt .-%, are used.
  • the glycol compound is used in liquid form, in particular as a solution or dispersion.
  • aqueous solutions and / or dispersions having a proportion of the glycol compound of 5 to 99% by weight, preferably 20 to 80% by weight, in particular 30 to 70% by weight. This ensures optimal mixing with the regrind.
  • glycol compound can also be used in solid form, e.g. applied on a solid support material or, where possible, in the form of powder, pellets or flakes.
  • Preferred substituents are alkyl groups.
  • the total number of carbon atoms of the substituted or unsubstituted alkylene group is in the range from 1 to 8, in particular 1 to 4, especially 1 to 2.
  • X is a substituted or unsubstituted alkoxy group having 1 - 8 carbon atoms.
  • X is a substituted alkylene group
  • the alkyl group preferably contains 1 to 4 or 1 to 2 carbon atoms.
  • R 1 and R 2 in formula I are each independently H, CH 3 or C 2 H 4 OH, in particular equal to H or CH 3 .
  • R 3 in formula I is H, C 3 H 6 OH or C 4 H 9 .
  • the at least one glycol compound is particularly preferably selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol, neopentyl glycol and hexylene glycol.
  • Propylene glycol has in particular a structure according to formula II:
  • Dipropylene glycol may be present in particular in the form of structures of the formulas III, IV and / or V:
  • Butyl diglycol, neopentyl glycol and hexylene glycol have in particular structures according to the formulas VI (butyl diglycol), VII (neopentyl glycol) and VIII (hexylene glycol):
  • X C (CH 3 ) 2 CH 2 .
  • the at least one glycol compound is particularly advantageously selected from diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol, neopentyl glycol and hexylene glycol.
  • it is diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol.
  • propylene glycol, dipropylene glycol and butyl diglycol is particularly advantageously selected from diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol.
  • the at least one glycol compound is selected from dipropylene glycol and butyl diglycol.
  • the at least one glycol compound is advantageously used in an amount of 0.001-1% by weight, in particular 0.02-0.5% by weight, based on the weight of the solid.
  • proportions of 0.005 to 0.4 wt .-%, in particular 0.02 to 0.3 wt .-% have proven to be particularly suitable.
  • the production performance and / or milling efficiency is significantly improved in such proportions or the material properties of the ground solid can be significantly increased.
  • Other shares are also possible in principle.
  • the at least one glycol compound is used in combination with at least one further additive.
  • the at least one further additive is chemically distinguishable from the at least one glycol compound.
  • a multiplicity of substances known to those skilled in the art can be used which act in particular as grinding aids and / or additives for binder compositions, for example concrete admixtures and / or mortar admixtures.
  • the further additive is in particular selected from the group comprising grinding aids, defoamers, dyes, preservatives, flow agents, plasticizers, accelerators, retarders, air entrainers, shrinkage reducers and / or corrosion inhibitors.
  • the at least one additive is milling aids, defoamers, dyes, preservatives, flow agents, plasticizers, accelerators, retarders, air entrainers, shrinkage reducers and / or corrosion inhibitors for mineral binders, mortar compositions and / or concrete compositions.
  • the further additive in an amount of 0.001 to 10 wt .-%, in particular 0.005 to 5 wt .-%, preferably 0.01 to 2 wt .-% or 0.05 to 1 wt .-%, based on the weight of the solid , used.
  • the additional additive is advantageously used in a liquid state.
  • the further additive may be present as a solution or dispersion.
  • an aqueous solution or dispersion In particular as an aqueous solution or dispersion.
  • the further additive is added to the solids before and / or during the milling process.
  • it is mixed before use with the at least one glycol compound. This facilitates the addition and dosage. But it is also possible a separate addition of further additive and the at least one glycol compound.
  • the at least one further additive contains a flow agent.
  • a flow agent This specifically includes a polycarboxylate, especially a polycarboxylate ether.
  • the flow agent is a comb polymer comprising a polycarboxylate backbone having attached thereto polyether side chains. The side chains are attached to the polycarboxylate backbone, in particular via ester, ether and / or amide groups.
  • the flow agent based on the solid which is in particular a mineral binder, advantageously a proportion of 0.01 to 6 wt .-%, in particular 0.1 to 4 wt .-%, more preferably 0.5 to 3 wt .-%, on , Due to the combination with the flow agent, the processability of a binder composition can be improved and at the same time higher compressive strengths are achieved.
  • the further additive comprises one or more of the following representatives: a) one or more amino alcohols and / or salts thereof, b) one or more glycols and / or glycol derivatives which differ in particular from the at least one glycol compound of formula I, c ) one or more polycarboxylates and / or polycarboxylate ethers.
  • Advantageous further amino alcohols are in particular trialkanolamines and / or dialkanolamines. Preference is given to triisopropanolamine, triethanolamine and / or diethanolamine.
  • Diisopropanolamine (DiPA) and / or N-methyldiethanolamine (MDEA) are likewise advantageous as further amino alcohols.
  • the glycol compounds according to the invention are generally well compatible with these representatives of other additives. This makes it possible, for example, to realize a flexible adaptation to special uses and / or a cost-effective optimization in the production of the additives.
  • a further aspect of the present invention relates to a method for grinding a solid, in particular an inorganic and / or mineral solid, wherein the solid to be ground is mixed with at least one glycol compound before and / or during milling and ground in a roller mill.
  • the invention likewise relates to a composition obtainable by the process described above.
  • the composition comprises a solid, preferably an inorganic and / or mineral solid, which has been ground together with the at least one glycol compound in a roller mill.
  • the at least one glycol compound, the solid and the roller mill are defined as described above.
  • the at least one glycol compound is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol, neopentyl glycol and hexylene glycol.
  • propylene glycol Preference is given to propylene glycol, dipropylene glycol, butyl diglycol, neopentyl glycol and hexylene glycol. Even more preferred are propylene glycol, dipropylene glycol and butyl diglycol, especially dipropylene glycol and butyl diglycol.
  • the present invention relates to a grinding aid composition
  • a grinding aid composition comprising: a) at least one glycol compound, wherein the at least one glycol compound is as defined above, and b) at least one further additive selected from the group comprising grinding aids, defoamers, dyes, preservatives, Flow agent, condenser, accelerator, retarder, air entraining agent, shrinkage reducer and / or a corrosion inhibitor, wherein the at least one further additive of the at least one glycol compound is chemically distinguishable.
  • the at least one glycol compound and the at least one further additive are defined as described above.
  • the at least one further additive comprises an aminoalcohol and / or polycarboxylate ether as described above.
  • a particularly preferred grinding aid composition includes or consists of: a) 5 to 99% by weight, preferably 5 to 80, more preferably 5 to 50% by weight, of the at least one glycol compound; b) 1 - 80 wt .-%, preferably 5 - 60 wt .-%, more preferably 5 - 30 wt .-%, of the at least one additive; c) 0-90% by weight, in particular 1-20% by weight, of at least one further component; d) 0-90 wt .-%, in particular 10 - 60 wt .-%, water.
  • Such grinding aid compositions have proven particularly suitable for uses in roller mills.
  • a composition comprising a solid, in particular an inorganic and / or mineral solid, and at least one glycol compound.
  • the glycol compound and the solid are defined as described above.
  • the solid contains or consists of a mineral binder.
  • the solid contains a mineral binder and the at least one glycol compound is selected from diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol, neopentyl glycol and hexylene glycol.
  • it is diethylene glycol, propylene glycol, dipropylene glycol, butyl diglycol.
  • Very particular preference is given to propylene glycol, dipropylene glycol and butyl diglycol.
  • composition is obtainable, for example, by mixing the at least one glycol compound with the solid by a method as described above or by using as described above.
  • Table 2 gives an overview of the grinding experiments carried out and the corresponding results.
  • the mill was operated with the following parameters:
  • Table 3 gives an overview of the results of milling experiments (RO is a reference sample without additive).
  • Table 3 clearly shows that the additives A1-A7 are suitable as grinding aids for roller mills and bring about an increase in production efficiency or milling efficiency. Especially good are the additives A3 (propylene glycol), A4 (dipropylene glycol) and A7 (hexylene glycol).
  • the observed vibration values are particularly surprising: the additives A3 (propylene glycol), A4 (dipropylene glycol) and A5 (butyl diglycol) result in particularly high reductions in the unwanted vibrations.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Disintegrating Or Milling (AREA)
  • Lubricants (AREA)

Abstract

La présente invention concerne l'utilisation d'au moins un composé glycolique comme auxiliaire de broyage lors du broyage d'au moins une matière solide, en particulier une matière solide inorganique et/ou minérale, dans un broyeur à cylindres, ledit composé glycolique présentant une structure de formule I, et a) R1, R2, R3 représentant indépendamment les uns des autres un atome d'hydrogène ou un groupe alkyle, alcoxy ou alcanol comportant de 1 à 8 atomes de carbone, en particulier de 2 à 4 atomes de carbone ; et b) X représentant un groupe alkylène substitué ou non substitué comportant de 1 à 8 atomes de carbone, en particulier de 1 à 4 atomes de carbone.
EP15775678.4A 2014-10-06 2015-10-02 Adjuvant pour le broyage dans des broyeurs à cylindres Withdrawn EP3204340A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14187787 2014-10-06
PCT/EP2015/072832 WO2016055376A1 (fr) 2014-10-06 2015-10-02 Adjuvant pour le broyage dans des broyeurs à cylindres

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US (1) US20170226011A1 (fr)
EP (1) EP3204340A1 (fr)
CN (1) CN107108355A (fr)
MX (1) MX2017003893A (fr)
WO (1) WO2016055376A1 (fr)

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CN110475758A (zh) * 2017-02-13 2019-11-19 Gcp应用技术有限公司 水泥的早期强度增强
US20210122675A1 (en) * 2018-01-05 2021-04-29 Gcp Applied Technologies Inc. Grinding stabilizing additive for vertical roller mills
FR3093106B1 (fr) * 2019-02-25 2022-08-12 Chryso Procédé de broyage de liant hydraulique

Citations (6)

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US3926650A (en) * 1970-11-16 1975-12-16 Hoechst Ag Foaming agent for plaster and cement compositions
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MX2017003893A (es) 2017-05-12
WO2016055376A1 (fr) 2016-04-14
US20170226011A1 (en) 2017-08-10
CN107108355A (zh) 2017-08-29

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