CN101208476A - Method for loading fibers contained in a pulp suspension - Google Patents
Method for loading fibers contained in a pulp suspension Download PDFInfo
- Publication number
- CN101208476A CN101208476A CNA2006800231565A CN200680023156A CN101208476A CN 101208476 A CN101208476 A CN 101208476A CN A2006800231565 A CNA2006800231565 A CN A2006800231565A CN 200680023156 A CN200680023156 A CN 200680023156A CN 101208476 A CN101208476 A CN 101208476A
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- dissolving
- aforesaid right
- fiber
- calcium hydroxide
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 239000000725 suspension Substances 0.000 title claims abstract description 45
- 239000000835 fiber Substances 0.000 title claims description 51
- 238000011068 loading method Methods 0.000 title abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 42
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 31
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 25
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 24
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 21
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000292 calcium oxide Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000011049 filling Methods 0.000 claims description 17
- 238000001556 precipitation Methods 0.000 claims description 16
- 238000004090 dissolution Methods 0.000 claims description 12
- 239000000123 paper Substances 0.000 claims description 12
- 238000010790 dilution Methods 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 9
- 238000007598 dipping method Methods 0.000 claims description 8
- 239000002657 fibrous material Substances 0.000 claims description 8
- 239000010893 paper waste Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229920003043 Cellulose fiber Polymers 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 4
- 239000011111 cardboard Substances 0.000 claims description 3
- 239000002761 deinking Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 2
- 229920000875 Dissolving pulp Polymers 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 claims 1
- 239000012634 fragment Substances 0.000 claims 1
- 238000005470 impregnation Methods 0.000 claims 1
- 239000011087 paperboard Substances 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 3
- 239000004571 lime Substances 0.000 abstract description 3
- 239000008267 milk Substances 0.000 abstract 1
- 210000004080 milk Anatomy 0.000 abstract 1
- 235000013336 milk Nutrition 0.000 abstract 1
- 230000001960 triggered effect Effects 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 19
- 238000002425 crystallisation Methods 0.000 description 13
- 230000008025 crystallization Effects 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000008187 granular material Substances 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 229910021532 Calcite Inorganic materials 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- JGGQNNZJVBRCRP-UHFFFAOYSA-N OC(=O)O.[C] Chemical compound OC(=O)O.[C] JGGQNNZJVBRCRP-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- JLCHNBRGUPQWKF-UHFFFAOYSA-J [OH-].[C+4].[OH-].[OH-].[OH-] Chemical compound [OH-].[C+4].[OH-].[OH-].[OH-] JLCHNBRGUPQWKF-UHFFFAOYSA-J 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 235000015250 liver sausages Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Disclosed is a method for loading a pulp suspension (S) with calcium carbonate. According to said method, liquid calcium hydroxide is added as lime milk (7) during or before the dissolving process (1) carried out to form the pulp, for example. A chemical reaction in which finely distributed calcium carbonate is precipitated is triggered by introducing gaseous carbon dioxide (8) into the pulp suspension processed in said manner. The inventive method is particularly economical and effective by adding calcium oxide or calcium hydroxide early on.
Description
The present invention relates to a kind of fiber of comprising at the fiber pulp suspension of being used for, especially for the packing method of the cellulose fibre of papermaking or cardboard.
When papermaking, filler, special as calcium carbonate (calcium carbonate of PCC=precipitation) or calcium carbonate pulverizing or that mill (calcium carbonate that GCC=grinds) precipitation are the materials of using always, in this optical property in order to reduce fibre weight and to improve paper.
At the material that commercial PCC-commonly used or GCC-filler relate to, it is with special preparation facilities preparation, this device at paper mill as the auxiliary equipment setting.Yet the online preparation of PCC was never carried out in paper industry, and this is owing to its special process performance, and it is that to be used to prepare PCC necessary.Replace to be PCC or GCC be transported in the paper mill as goods in bulk or with the form of suspension.
Use material, filling for example can be reacted by chemical precipitation as filler, and is just special in so-called " fiber filling
TM" process carries out, as described at US-A-5 223 090.Such " fiber filling
TM" fill a kind of additive, particularly filler at least at the moistening fiber surface place of fibrous material during process.To for example available calcium carbonate filling of this fiber.Will add calcium oxide and/or calcium hydroxide at this like this to wet, comminuted fibres material, causing wherein, at least a portion combines with the water that exists in fibrous material.The fibrous material of Chu Liing impacts with carbon dioxide subsequently like this.
Carry out a kind of chemical reaction with performance of heat release when interpolation contains the medium of calcium oxide and/or calcium hydroxide on fibrous suspension, wherein calcium hydroxide preferably adds with the form (milk of lime) of liquid state.This means that this is not absolute, it can begin and carry out chemical reaction the water that infiltrates in the fibre material of fibrous suspension or on the fibre material of fibrous suspension or exist is essential.
Know a kind of method from FR 2831565, load with calcium carbonate with the suspension of this method by the lumber fibre (pate à papier m é canique blanchie) of the bleaching of machinery generation.Form thus in the fibrous suspension and to add milk of lime and regulate more than the denseness to 10%.The crystallization of dissolving calcium carbonate by the interpolation gaseous carbon dioxide in suspension dilution back.
WO 03/066962 has pointed out another kind of method with the filler filling.For example further improve thus by a special process of lapping.
Also can be when for example fiber being loaded for example at moistening fiber surface filling calcium carbonate (CaCO with filler
3), wherein, in wet fibrous material, add calcium oxide (CaO) and/or calcium hydroxide (Ca (OH)
2), on this aspect from wherein combining with the water of fibre weight to small part.The available then carbon dioxide (CO of the fibrous material of Chu Liing like this
2) impact.
Notion " moistening fiber surface " can comprise the moistening surface of all single fibers.Especially also be interpreted as this situation thus, in this case fiber not only its outer surface and also within it portion's (inner chamber) with calcium carbonate or other precipitated product filling arbitrarily.
So for example for example available filler-calcium carbonate filling of fiber, the filling on moistening fiber surface is by so-called " fiber filling thus
TM"-process is carried out, as its described in the US-A-5 223 090.In this " fiber filling
TMFor example carbon dioxide and hydroxide carbon water generation reaction and carbonic acid carbon in the "-process.
Calcium hydroxide can add in the fiber with the form of liquid state or with the form of drying.
The objective of the invention is to, propose the method for the described technology of a kind of preamble, it is more more economical than known method.
This task according to the present invention in claim 1 given method solve in the described feature of characteristic by it.
Be used to implement starting material of the present invention, what be fit to basically is all papermaking or the applied cellulose fiber element of preparation cardboard.Particularly preferred can be to carry out with the cellulose of chemical method generation or the waste paper of deinking.The latter, air drying and the dissolving according to the present invention then when delivering to the paper mill like that the material that illustrates with " dipping " can be similar to cellulose or waste paper.Load subsequently.Waste paper dissolving, deinking and the filling (referring to Fig. 2) of printing when the dipping of integration-production according to the present invention.
The method according to this invention provides and can make calcium oxide (CAO) and/or calcium hydroxide (CAOH
2) add in the fibrous material with this state, wherein make it have higher denseness, as air dried or moistening.The fiber material is that adsorption capacity is arranged before joining the material dissolution device and adding wherein, that is to say that the chemical reagent that adds at this more easily and more quickly arrives the moistening surface of fiber.The cavity that enters into fiber also is corresponding very fast and more favourable.Because in dissolver, added liquid, particularly water originally as material dissolution device or dissolving cylinder, it is simple and clearly that this process steps keeps.Be that being metered into of calcium oxide or calcium hydroxide is normally essential.Also possible is, dissolver is provided with like this, causes wherein the precipitation of calcium carbonate can dissolve, wherein, provides a part of carbon dioxide at least in equipment.It for example also can be dissolved in the water.Or dissolver temporary close and feed with gaseous carbon dioxide.Consider the dipping spare before dissolver in this case, wherein calcium hydroxide (milk of lime) sprays or is added in the dipping cylinder.
Another advantage of the method according to this invention is, perhaps can save under the situation of machine compression, and just Rong Xie paper pulp only dilutes so far forth when course of dissolution, makes it can implement subsequently filling.In another case, particularly when the purification to material has higher requirement (waste paper is opened) or when individual fibers can not be enough to reach then must be compressed in the mode of helical-lobe compressor again certainly.The filtrate of this compression can directly be got back in the circulation of a weak point in the dissolver, also is used for dilution at this.This has conclusive advantage, promptly uses calcium hydroxide or calcium oxide best, does not also promptly have only water, and also reusable edible of chemical reagent.
Be known that in many cases course of dissolution is water only not, but also undertaken, to obtain the medium of alkalescence by adding solubilising reagent, particularly NaOH.Also have advantage in this this method, because NaOH can be replaced by calcium hydroxide, and calcium hydroxide is always essential for the precipitation process of the calcium carbonate of later enforcement.
Explain the advantage of the present invention and it with reference to the accompanying drawings, this:
Fig. 1 illustrates the method according to this invention in schematic form;
Fig. 2 is used for the special embodiment of processing printed waste paper;
Fig. 3 is used to implement the device schematic diagram of the simplification of the method according to this invention.
Fig. 1 illustrates, fiber P when implementing this method, and it for example is waste paper or also can is new cellulose, processed in dissolving 1.This by means of mechanical force with mixing of water W under form fibrous suspension S in known manner.Calcium hydroxide adds when dissolving as milk of lime 7 in this embodiment, and for example it is regulated by the dissolving of lime in milk of lime preparation 5.In case of necessity, fibrous suspension S can wherein, for example remove heavy composition and plastics or other refuse by importing in this not shown purification systems.Whether this is essential, depends primarily on the quality of raw material.Perhaps can concentrate 2 subsequently, yet this is not always essential also therefore being represented by dotted lines.Concentrated 2 filtrate 9 is to be used to dissolve 1.The process steps of the precipitation 3 of subtitle substance, particularly calcium carbonate is to dissolve by adding gaseous carbon dioxide 8, and carbon dioxide is from carbon dioxide preparation 6.
Like this fibrous suspension S ' of processed can be transported to papermaking 4 then, this also have usually a series of other at this not shown essential treatment step.Be settled out known so-called screening water (siebwasser) when papermaking 4, it at first is suitable for, and partly reuses in dissolving 1 as recirculated water 9 '.So not only answer water again, and also contain the calcium hydroxide that does not consume therein.
To handle like this by floatation process 31 through the fibrous suspension S that the dissolving 1 of waste paper of printing is obtained according to Fig. 2, the tiny harmful substance of printing color particle and possible other is removed as refuse.Yet in dissolving 1, in dissolving, replace NaOH usually so far to cross calcium hydroxide.
Equipment with most important method step and device exemplarily is described in Fig. 3.Fiber P joins in the material dissolution device 10 with water W in this device.This material dissolution device 10 can be that tradition is set up, and also can contain a material dissolution device filter screen 11 at its bottom section, and a material dissolution device rotor 12, and it is used in the rotation of material dissolution device and material dissolution device filter screen 11 is not stopped up.Be transported in a plurality of purifiers among Rong Xie the fiber embodiment that goes out shown here like this, its numbering is marked as material clarifier 14 and Classification of materials device 15.The screw compression device of following then 16 is to improve the denseness of fibrous suspension again.The compression filtrate 18 of screw compression device 16 can advantageously be carried back in the material dissolution device 10 to dissolve.The fiber 19 of Nong Suoing is delivered to crystallizer 20 then, and its effect is, by means of the calcium carbonate desired precipitation of carbon dioxide 24 dissolvings of being imported with the filler of FINE DISTRIBUTION.Carbon dioxide is regulated by carbon dioxide feeder 21 and can be adjusted to desired temperature by means of cold-producing medium or heating agent 23 in heat exchanger 22.Yet the possibility that other adjusting temperature is also arranged for example directly adds steam when expectation improves temperature.Under the necessary situation, a part of carbon dioxide 24 ' also can add by means of mixing arrangement 25 after crystallization, so that the filling process is complete.The fibrous suspension that in storage bin hopper 26, compiles loading, can with dilution water 27 dilution and then as the fibrous suspension 28 of paper machine 29 to use.
Be to be used for shown in Fig. 3 with filler, the device part of calcium carbonate filling particularly, it is only as the embodiment that simplifies.Also can be integrated into a bleacher in many cases.The many details that are used for implementing to load can be known from publication mentioned above.The filling process has as the advantage that operates at line process in the paper mill.
Use at line process at this following at least device and/or reagent: HC-clarifier, static mixer, lime removal device, forcing press, particularly flypress or belt press, balanced reaction device, crystallizer, other static mixer, CO
2-feedway or additional CO
2-regenerating unit, CO optionally
2-heater, the optionally reinforced thing of chemical bleaching agent, high-pressure water tank.
The short grained formation of the precipitated product of crystallization has additional advantage, need can reach higher gloss number for end product as long as have.
According to the actual arrangement press filtration filtrate 9 by method of the present invention in crystallizer 20 to small part as dilution water.
Mixing arrangement 25 can be that static blender is also used the pH-value with meticulous adjusting fibrous suspension especially, is preferably between the 6-8.
The necessary CO of at least a portion preferably
2Be to pass through CO
2The preparation of-regenerating system.So for example can obtain once more by the flue gas of boiler or the flue gas of motor vehicle.
For example the precipitated product granule of rhombohedron form can produce the cubic granules granularity separately of the scope with the about 2 μ m of about 0.05-.Under certain conditions, this also has advantage, and the precipitated product granule of scalenohedron (skalenoedrischen) form has each diameter of the scope of each length of scope of the about 2 μ m of about 0.05-and the about 0.05 μ m of about 0.01-.
According to a preferred actual arrangement by the inventive method, its fibre concentration that is used to precipitate prepared fibrous suspension is chosen as about 5 to about 60% and be preferably about 10 to 35%.
The carbon dioxide that according to the suitable actual arrangement of a packing method is fibrous suspension is preferably about 20 and adds to about 90 ℃ temperature approximately-15 to about 120 ℃ temperature.
The paper of preparation also can contain the filler of grain graininess for the about 5 μ m of about 0.05-, has improved the optical property of end product thus.At this moment filler can be particularly related to calcium carbonate, and it for example exists with calcite (Calcit) or calcite (Kalkspat), aragonite with the Vaterit form of rareness at nature.Filler mainly can be made of calcite, wherein should exist to surpass 300 kinds of different crystal forms.Employed filler granule can for example have the about 2 μ m of about 0.05-scope cubic granules granularity separately rhombohedron or for example have each length of scope of the about 2 μ m of about 0.05-and the scalenohedron of each diameter of the scope of the about 0.05 μ m of about 0.01-, this depends on the kind of the paper that each will prepare.
Filler is be distributed in fiber well top, on every side and inner, this means, not with the crystal aggregation of bunchy.Each filler granule, i.e. crystallization are that each has at interval or separates on fiber.The filler granule covers fiber by gathering on fiber, so just improved the optical characteristics of end product.So the granule granularity mainly is the purpose that is used to reach best opacity.When the spectrum of luminous ray is good scattering, then just reach the height opacity.If the absorption chromatogram, then color is black.The short grained granularity of filler of precipitation then just draws the trend of transparent and higher gloss below 0.2-0.5 μ m.
For the purpose that obtains good filling result is used for producing the relevant process of filler crystallization can following setting and have following changing factor:
-moist or in dissolving residing fiber
-with the NaOH of liquid form or dried forms
-CO
2
-gas zones
-rotor (crystallizer)
-stator (crystallizer)
-in gas atmosphere, generate crystallization under the mixing energy not introducing
-mixing under small shearing force
-there is not a pressure vessel
At first make and Ca (OH)
2The fibrous suspension that mixes, is preferably under the scope of about 10-about 35% and joins in the crystallizer 20 under about 60% scope of about 5-at denseness or fibre concentration, as carrying out in fluffer, refiner, dispersion machine or similar machine.Fibrous suspension CO
2Impact.This CO
2For example can to the temperature of about 120 ℃ scope, to the temperature of about 90 ℃ scope, add about-15 with being preferably about 20.
Fibrous suspension arrives in the gas zone of crystallizer 20, is in the gas atmosphere at this every single fiber, carries out precipitation reaction subsequently, directly generates CaCO
3CaCO
3The form of crystallization for example can be rhombohedral, scalenohedron or sphere, and wherein crystallization content depends on and selectedly is used for the temperature range of fibrous suspension and depends on CO
2-content and the Ca in fibrous suspension (OH)
2-content.In fibrous suspension and formed crystallization by after the gas zone, formed PCC or fibrous suspension and crystallization are carried at inner chamber, on the fiber or between fiber by rotor and stator, are to finish to mix under the small shearing force in the distribution of this crystallization in suspension.
By during the rotor, distribution, the crystalline particle size distribution that it causes the about 0.5 μ m of about 0.05-and is preferably the about 2.5 μ m of about 0.3-appear shearing in fiber/crystallization suspension.
The short grained form of applied filler for example is to have the rhombohedral of each interior cubic granules of about 2 mu m ranges of about 0.05-or have length for being each interior scalenohedron of about 0.5 mu m range of about 0.01-with diameter in about 2 mu m ranges of about 0.05-, and this depends on the paper type that will prepare.
Fibrous suspension is far away more from the distance of rotor disk, and shearing force is more little, and this depends on the H that dilution is used
2O.The concentration of the fibrous suspension by rotor disk is about 50% for about 0.1-, is preferably about 35-about 50%.
CO
2The surge of-conveying circuit is in particular the scope of the about 6bar of about 0.1-, is preferably the about 3bar of about 0.3-, is used for the constant CO of the gas ring of desired chemical reaction with assurance
2-supply with.As when supplying with water, improving pressure during in high water demand, to carry more water by pipeline by the garden pipeline.Because CO
2Be a kind of compressible gas, also can improve necessary amount, to guarantee a reaction completely at this.CO
2Thereby-supply and the CaCO that causes
3Precipitation reaction can be controlled and/or regulate by the pH-value.
For example note being used for CaCo
3The pH-value of the final reaction of crystallization is that 6.0-is about 10.0, is preferably about 7.0-about 8.5.The energy that is used for this process can be in particular the about 8kWh/t of about 0.3-and be preferably the about 4kWh/t of about 0.5-.Can add dilution water and mix with fibrous suspension, to obtain final dilution, wherein, the denseness of the fibrous suspension with filler that is generated or solids concentration are for example about 16% for about 0.1-, are preferably about 2-about 6%.Then fibrous suspension is placed in the process machine of machine, container or next air atmosphere.
The velocity of rotation of rotor disk can about especially 20-100m/s and be preferably the about 60m/s of about 40-in outer radius.
Slit between rotor and the stator for example is the about 100mm of about 0.5-and is preferably the about 75mm of about 25-.
The diameter of rotor and stator can be in particular the about 2m of about 5-.
Reaction time is preferably about 0.001-1min, is preferably the about 10sec of about 0.1-.
Above-mentioned method can make the single granule of preparation, and granule has spacing between mutually and is laid on the fiber, and wherein its kind and mode with necessity covers fiber, to satisfy the requirement to the paper of desired high whiteness or gloss.Grain graininess is preferably the about 5 μ m of about 0.05-, is that the about 2 μ m of about 0.05-are the about 0.5 μ m of about 0.01-with relevant diameter for the preferred grain graininess of rhombohedral cubic form for the about 2 μ m of about 0.05-or for the relevant length of scalenohedron form wherein.For the application granule granularity of high glaze suitable be below the 0.2-0.5 μ m.
Claims (26)
1. one kind with the method for calcium carbonate to the filling of the contained cellulose fibre of fibrous suspension (S), and it has following method step:
-be incorporated in the fiber material with the calcium hydroxide or the calcium oxide of liquid state or dry form,
-formation fibrous suspension (S),
The carbon dioxide of-introducing gas form joins in the fibrous suspension (S),
-calcium carbonate precipitates (3) by carbon dioxide,
It is characterized in that calcium oxide or calcium hydroxide are to add when being used to form the fiber of fibrous suspension (P) and dissolving (1) or before.
2. according to the method for claim 1, it is characterized in that dissolving (1) is carried out continuously.
3. according to the method for claim, it is characterized in that dissolving (1) is that discontinuous that carry out and dissolving (1) when beginning is by being metered into the calcium hydroxide of operative liquid form at least.
4. according to the method for claim 1,2 or 3, it is characterized in that dissolving (1) is implemented in material dissolution device (10).
5. according to the method for claim 1,2 or 3, it is characterized in that dissolving (1) is implemented in the dissolving cylinder.
6. according to the method for claim 5, it is characterized in that calcium oxide or calcium hydroxide add in the feed zone of dissolving cylinder.
7. according to the method for one of aforesaid right requirement, it is characterized in that dissolving (1) is in the consistency range of 3-30%, implement under the consistency range of preferred 10-20%.
8. according to the method for one of aforesaid right requirement, it is characterized in that fiber (P) is dissolving (1) water and calcium hydroxide dipping before.
9. method according to Claim 8 is characterized in that, uses dipping cylinder impregnation of fibers (P).
10. method according to Claim 8 is characterized in that, calcium hydroxide is ejected on the fiber (P) when dipping.
11. the method according to aforesaid right one of requires is characterized in that, adds calcium hydroxide and the denseness of milk of lime is adjusted to the 0.01-60% of solid constituent of the paper material of existing drying with the form of milk of lime.
12. the method according to aforesaid right one of requires is characterized in that, is 0.01-10 minute to the reaction adjusting reaction time of calcium hydroxide, is preferably 1 second to 3 minutes.
13. the method according to one of aforesaid right requirement is characterized in that, uses fiber (P) as parent material, its denseness is 40-100%.
14. the method according to one of aforesaid right requirement is characterized in that, what carry out after dissolving (1) step is to be used for from the harmful substance cleaning fibrous suspensions.
15. the method according to claim 14 is characterized in that, for cleaning fibrous suspensions, removes the printing color particle with at least a floatation process (31).
16. the method according to one of aforesaid right requirement is characterized in that fibrous suspension (S) concentrates before at the carbon dioxide (24) that adds gas form again.
17. the method according to claim 16 is characterized in that, the filtrate (9) that produces in concentrating (2) is introduced in the dissolving (1).
18. the method according to aforesaid right one of requires is characterized in that, fibrous suspension is when precipitation (3) or be transformed into tiny fiber fragment afterwards and disperse in a pulverising step.
19. the method according to one of aforesaid right requirement is characterized in that the precipitation of calcium carbonate (3) is 5-60% in its denseness, carries out when being preferably 10-35%.
20. the method according to one of aforesaid right requirement is characterized in that the energy consumption that is used for precipitation (3) is 0.3-8kWh/t, is preferably 0.5-4kWh/t.
21. the method according to one of aforesaid right requirement is characterized in that, the adjustment when precipitation (3) extremely between-15 and 120 ℃, preferably is adjusted to 20-90 ℃.
22. the method according to aforesaid right one of requires is characterized in that, precipitation (3) is at the 0-15 crust, is preferably under the pressure of 0-6 crust to carry out.
23. the method according to one of aforesaid right requirement is characterized in that, regulating the pH-value when precipitation (3) is 6-10, is preferably 6.5-8.5.
24. the method according to one of aforesaid right requirement is characterized in that the reaction time of precipitation (3) is adjusted to 0.01-1 minute, is preferably 0.5-10 second.
25. method according to one of aforesaid right requirement, it is characterized in that, produce paper or cardboard and thereby at the screening water that contains calcium hydroxide of this generation backwater (9 ') as dissolving (1) that is used for fiber or dilution by the fibrous suspension of the cellulose fibre that contains filling (S ').
26. the method according to one of aforesaid right requirement is characterized in that, is used for dissolving cellulose fibre to the waste paper (dipping) of small part by deinking of (1) being introduced and constitutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005032383 | 2005-07-12 | ||
| DE102005032383.9 | 2005-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101208476A true CN101208476A (en) | 2008-06-25 |
Family
ID=37637514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800231565A Pending CN101208476A (en) | 2005-07-12 | 2006-05-24 | Method for loading fibers contained in a pulp suspension |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20080210391A1 (en) |
| EP (1) | EP1904681A2 (en) |
| CN (1) | CN101208476A (en) |
| CA (1) | CA2614813A1 (en) |
| WO (1) | WO2007006368A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492893B (en) * | 2009-03-03 | 2010-12-29 | 金东纸业（江苏）股份有限公司 | Process for manufacturing calcium carbonate composite fiber and uses thereof |
| CN103154369A (en) * | 2010-08-20 | 2013-06-12 | 芬欧汇川集团公司 | A method and a system for precipitation of calcium carbonate and a product comprising calcium carbonate |
| CN103154368A (en) * | 2010-06-03 | 2013-06-12 | 诺德卡尔克有限公司 | Process for manufacturing paper or board |
| CN107922207A (en) * | 2015-09-08 | 2018-04-17 | 日本制纸株式会社 | The complex and its manufacture method of magnesium carbonate particulate and fiber |
| CN115315555A (en) * | 2020-03-24 | 2022-11-08 | 德尔福特集团有限公司 | Wrapper paper for smoking articles with improved ash formation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007028539A1 (en) * | 2007-06-21 | 2008-12-24 | Voith Patent Gmbh | Process for forming calcium carbonate in a pulp suspension |
| DE102007051665A1 (en) * | 2007-10-30 | 2009-05-07 | Voith Patent Gmbh | Process for the formation of calcium carbonate in a pulp suspension |
| DE102007051664A1 (en) * | 2007-10-30 | 2009-05-07 | Voith Patent Gmbh | Process for the formation of calcium carbonate in a pulp suspension II |
| SI2805986T1 (en) | 2009-03-30 | 2018-04-30 | Fiberlean Technologies Limited | Process for the production of nano-fibrillar cellulose gels |
| HUE026741T2 (en) | 2009-03-30 | 2016-07-28 | Omya Int Ag | Process for the production of nano-fibrillar cellulose suspensions |
| GB0908401D0 (en) | 2009-05-15 | 2009-06-24 | Imerys Minerals Ltd | Paper filler composition |
| FI124831B (en) * | 2010-03-10 | 2015-02-13 | Upm Kymmene Oyj | Process and reactor for in-line production of calcium carbonate in a pulp flow |
| FI122304B (en) | 2010-04-22 | 2011-11-30 | Nordkalk Oy Ab | Use of acidic water in paper making |
| EP2386683B1 (en) | 2010-04-27 | 2014-03-19 | Omya International AG | Process for the production of gel-based composite materials |
| DK2386682T3 (en) | 2010-04-27 | 2014-06-23 | Omya Int Ag | Process for preparing structured materials using nano-fibrillar cellulose gels |
| GB201019288D0 (en) | 2010-11-15 | 2010-12-29 | Imerys Minerals Ltd | Compositions |
| US20120180962A1 (en) * | 2010-11-21 | 2012-07-19 | Aicardo Roa-Espinosa | Apparatus and process for treatment of fibers |
| US8444810B2 (en) * | 2010-11-21 | 2013-05-21 | Aicardo Roa-Espinosa | Apparatus and process for treatment of fibers |
| FI126072B (en) | 2013-03-18 | 2016-06-15 | Linde Ag | Fiber filling method |
| SE538770C2 (en) * | 2014-05-08 | 2016-11-15 | Stora Enso Oyj | Process for making a thermoplastic fiber composite material and a fabric |
| EP3362508B1 (en) | 2015-10-14 | 2019-06-26 | FiberLean Technologies Limited | 3d-formable sheet material |
| RU2727605C1 (en) | 2016-04-05 | 2020-07-22 | Фиберлин Текнолоджис Лимитед | Paper and cardboard products |
| US11846072B2 (en) | 2016-04-05 | 2023-12-19 | Fiberlean Technologies Limited | Process of making paper and paperboard products |
| KR102137796B1 (en) | 2016-04-22 | 2020-07-24 | 파이버린 테크놀로지스 리미티드 | Compositions comprising microfibrilated cellulose and polymers and methods of manufacturing fibres and nonwoven materials therefrom |
| CN113957739B (en) * | 2021-10-28 | 2024-04-26 | 山东天和纸业有限公司 | Method and equipment for improving lead retention rate of sketch paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1424411A (en) * | 1916-12-15 | 1922-08-01 | Lincoln Trust Company | Method for recovering waste paper |
| US5223090A (en) * | 1991-03-06 | 1993-06-29 | The United States Of America As Represented By The Secretary Of Agriculture | Method for fiber loading a chemical compound |
| US6022447A (en) * | 1996-08-30 | 2000-02-08 | Kimberly-Clark Corp. | Process for treating a fibrous material and article thereof |
| US6533895B1 (en) * | 2000-02-24 | 2003-03-18 | Voith Sulzer Paper Technology North America, Inc. | Apparatus and method for chemically loading fibers in a fiber suspension |
| FR2831565B1 (en) * | 2001-10-30 | 2004-03-12 | Internat Paper Sa | NOVEL BLANCHIE MECHANICAL PAPER PULP AND MANUFACTURING METHOD THEREOF |
| EA006451B1 (en) * | 2002-02-02 | 2005-12-29 | Фойт Пэйпер Патент Гмбх | Method for preparing fibres contained in a pulp suspension |
| US20040159413A1 (en) * | 2003-02-03 | 2004-08-19 | Rayonier Products And Financial Services Company | Cellulosic fiber web treatment systems and associated processes |
| DE10351292A1 (en) * | 2003-10-31 | 2006-02-02 | Voith Paper Patent Gmbh | Method for loading a pulp suspension and arrangement for carrying out the method |
-
2006
- 2006-05-24 CN CNA2006800231565A patent/CN101208476A/en active Pending
- 2006-05-24 WO PCT/EP2006/004922 patent/WO2007006368A2/en active Application Filing
- 2006-05-24 CA CA002614813A patent/CA2614813A1/en not_active Abandoned
- 2006-05-24 EP EP06753824A patent/EP1904681A2/en not_active Withdrawn
-
2008
- 2008-01-07 US US11/970,219 patent/US20080210391A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492893B (en) * | 2009-03-03 | 2010-12-29 | 金东纸业（江苏）股份有限公司 | Process for manufacturing calcium carbonate composite fiber and uses thereof |
| CN103154368A (en) * | 2010-06-03 | 2013-06-12 | 诺德卡尔克有限公司 | Process for manufacturing paper or board |
| CN103154369A (en) * | 2010-08-20 | 2013-06-12 | 芬欧汇川集团公司 | A method and a system for precipitation of calcium carbonate and a product comprising calcium carbonate |
| CN103154369B (en) * | 2010-08-20 | 2018-06-05 | 芬欧汇川集团公司 | Method and system for winnofil and the product including calcium carbonate |
| CN107922207A (en) * | 2015-09-08 | 2018-04-17 | 日本制纸株式会社 | The complex and its manufacture method of magnesium carbonate particulate and fiber |
| CN115315555A (en) * | 2020-03-24 | 2022-11-08 | 德尔福特集团有限公司 | Wrapper paper for smoking articles with improved ash formation |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080210391A1 (en) | 2008-09-04 |
| WO2007006368A2 (en) | 2007-01-18 |
| CA2614813A1 (en) | 2007-01-18 |
| EP1904681A2 (en) | 2008-04-02 |
| WO2007006368A3 (en) | 2007-05-31 |
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Open date: 20080625 |