CN103328383A - Process for producing ss-2caosio2 - Google Patents

Process for producing ss-2caosio2 Download PDF

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Publication number
CN103328383A
CN103328383A CN2011800657342A CN201180065734A CN103328383A CN 103328383 A CN103328383 A CN 103328383A CN 2011800657342 A CN2011800657342 A CN 2011800657342A CN 201180065734 A CN201180065734 A CN 201180065734A CN 103328383 A CN103328383 A CN 103328383A
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quality
raw material
brick
sio
mortar
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CN103328383B (en
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樋口隆行
富冈茂
渡边晃
山本贤司
盛冈实
庄司慎
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Denka Co Ltd
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Denki Kagaku Kogyo KK
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/24—Alkaline-earth metal silicates
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/023—Fired or melted materials

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  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

A process for producing ss-2CaOSiO2, comprising: selecting a raw material which comprises CaO and SiO2 as the main components and has a CaO/SiO2 molar ratio of 1.8 to 2.2 and which, after being heated at 1000 DEG C, exhibits a total content of Al2O3 and Fe2O3 of less than 5 mass%, and a total content of boron, phosphorus, barium, strontium and molybdenum of less than 0.5 mass% in terms of oxides; preparing, from the raw material, a mixture wherein the ratio of particles passing through a screen having 150-[mu]m openings is 90 mass% or higher; granulating the mixture; and firing the granulated mixture at a firing temperature of 1350 to 1600 DEG C in a rotary kiln in which brick or mortar is used on the inside surface of the firing zone. The brick or mortar is at least one selected from the group consisting of silica-alumina bricks comprising 45 to 80 mass% of Al2O3 and 20 to 55 mass% of SiO2, silica-alumina mortars comprising 25 to 80 mass% of Al2O3 and 20 to 75 mass% of SiO2, magnesia bricks comprising at least 85 mass% of MgO, and magnesia mortars comprising at least 85 mass% of MgO.

Description

β-2CaOSiO 2Manufacture method
Technical field
The present invention relates generally to and can be used as β-2CaOSiO that cement admixture uses rightly 2Manufacture method.
Background technology
At 2CaOSiO 2In the crystalline form of (Dicalcium Phosphate (Feed Grade)), known α type, β type, γ type etc.Wherein, stable at normal temperatures is β type and γ type.Known β type is a kind of composition of silicate cement (portland cement), although have the hydraulicity a little less than the hydraulicity.On the other hand, though the γ type does not have the hydraulicity, carbonating is active high, is found (with reference to patent documentation 1) in recent years as the availability of cement admixture.
At pure 2CaO-SiO 2In the system, can not generate the 2CaOSiO of β type 2, can form the γ type.As to 2CaOSiO 2The principal element that exerts an influence of crystal habit, known have: (1) ternary influence, the influence of (2) cooling conditions, (3) oxidation-reduction atmosphere etc.
As ternary influence, if known the mixing exists a certain amount of above boron, phosphorus, barium, strontium, iron, aluminium, molybdenum etc., then can generate β-2CaOSiO 2(with reference to non-patent literature 1, non-patent literature 2 and non-patent literature 3).
The prior art document
Non-patent literature
Patent documentation 1:WO03/016234 brochure
Non-patent literature
Non-patent literature 1:Schwiete et al., Zem.-Kalk-Gips, Vol.21, No.9,359,1968
Non-patent literature 2: bavin Tian Chunfu etc., Kiln industry Association meeting Chi, Vol.92, No.2,71,1984
Non-patent literature 3:Niesel et al.Tonind-Ztg., Vol.93, No.6,197,1969
Summary of the invention
The problem that invention will solve
The object of the present invention is to provide the whiteness height, neither contain hazardous substance, also can not hinder the β-2CaOSiO of the setting and harden of cement 2Manufacture method.
For the scheme of dealing with problems
The inventor etc. have carried out various researchs repeatedly, found that: by selecting specific raw material, raw material to specified particle size carries out granulation, is used in to have used the rotary kiln of specific brick, specific mortar to burn till in the clinkering zone, can easily generate β-2CaOSiO 2
That is, the present invention is a kind of β-2CaOSiO 2Manufacture method, it is characterized in that with 1350 ℃～1600 ℃ of temperature of combustion the raw material through granulation is burnt till, wherein, described rotary kiln has used at the inner face of clinkering zone and has been selected from by Al in rotary kiln 2O 3Be 45 quality %～80 quality %, SiO 2Be silica-alumina matter brick, the Al of 20 quality %～55 quality % 2O 3Be 25 quality %～80 quality %, SiO 2Silica-alumina matter mortar, the MgO that is 20 quality %～75 quality % is that the above magnesia brick of 85 quality % and MgO are the brick more than at least a kind or the mortar in the group formed of the above magnesium oxide mortar of 85 quality %, and described raw material through granulation obtains in the following way: select with CaO and SiO 2As main component, CaO/SiO 2Mol ratio be Al after 1.8～2.2,1000 ℃ of heating 2O 3With Fe 2O 3Total content less than 5 quality %, and the total content of boron, phosphorus, barium, strontium and molybdenum is pressed oxide compound and is converted less than the raw material of 0.5 quality %, to the granularity of raw material by 150 μ m percent of pass count more than the 90 quality %, namely the screen underflow of 150 μ m is that raw material more than the 90 quality % carries out granulation.
In the present invention, preferably, the CaO in the raw material and SiO 2Press CaO/SiO 2Molar ratio computing be 1.9～2.1.
In addition, the raw material after 1000 ℃ of heating preferably contains the Fe less than 2 quality % 2O 3
And then the granularity of raw material is preferably more than the 90 quality % by 100 μ m percent of pass.
Raw material of the present invention preferably uses the water of counting 10 quality %～30 quality % by the ratio of water/raw material to carry out granulation.
Temperature of combustion when burning till in addition, is preferably 1400 ℃～1500 ℃.
And then the thickness of the mortar on the brick surface of the clinkering zone of rotary kiln is preferably 5mm～10mm.
β-the 2CaOSiO that obtains by manufacture method of the present invention 2Can be used as cement admixture uses aptly.
The effect of invention
According to β-2CaOSiO of the present invention 2Manufacture method, can be continuously and easily make the whiteness height, neither contain hazardous substance, also can not hinder the β-2CaOSiO of the setting and harden of cement 2
Embodiment
Need to prove that " part " among the present invention, " % " are not having to represent quality criteria under the situation of special stipulation.
Alleged β-2CaOSiO among the present invention 2Be with CaO and SiO 2As the so-called Dicalcium Phosphate (Feed Grade) (2CaOSiO in the compound of main component 2) a kind of.In the crystalline form of Dicalcium Phosphate (Feed Grade), there are α type, α ' type, β type, γ type.The present invention relates to the Dicalcium Phosphate (Feed Grade) of β type.
In the present invention, use CaO raw material and SiO 2Raw material is as main component.Main component refers to CaO and the SiO in the preferred feedstock 2Total content be preferably more than 80%, more preferably more than 90%, the content of the composition beyond their few meaning of trying one's best.
As the CaO raw material, can use calcium carbonate, calcium hydroxide, calcium oxide etc.
As SiO 2Raw material can be selected silica micro mist, clay, silicon ash, flying dust, amorphousness silica, other siliceous materials that generated by each industry pair etc.
Wherein, in the present invention, need to limit the existence of impurity.Particularly, from CaO raw material, SiO 2The Al that raw material is sneaked into 2O 3, Fe 2O 3The raw material of total amount after 1000 ℃ of heating in need be less than 5%.Al 2O 3, Fe 2O 3Total amount be more preferably less than 4%, most preferably less than 3%.
Especially, Fe 2O 3Content preferably in the raw material after 1000 ℃ of heating less than 2%, be more preferably less than 1.5%, most preferably less than 1%.
In addition, as other compositions, the total content of boron, phosphorus, barium, strontium and molybdenum is preferably pressed oxide compound and is converted less than 0.5%, more preferably below 0.3%.If not in aforementioned range, then from the containing of whiteness, objectionable impurities, it is not preferred sometimes that the viewpoint that the sclerosis of cement hinders is set out.
CaO raw material and SiO 2The compounding ratio of raw material need be adjusted to the CaO/SiO in the raw material 2Mol ratio is 1.8～2.2.The CaO/SiO of raw material 2Mol ratio was less than 1.8 o'clock, and the meeting pair generates the wollastonite of α type, the β-2CaOSiO in the resultant 2The containing ratio step-down.The CaO/SiO of raw material 2Mol ratio surpasses at 2.2 o'clock, can secondaryly generate 3CaOSiO 2, free lime, the β-2CaOSiO in the resultant 2Containing ratio still can step-down.The CaO/SiO of raw material 2Mol ratio is preferably 1.8～2.2, and more preferably 1.9～2.1.
CaO raw material and SiO 2The granularity of raw material need prepare to 150 μ m percent of pass be more than 90%, namely the screen underflow of 150 μ m is more than 90%, more preferably prepares 100 μ m percent of pass and be more than 90%, namely the screen underflow of 100 μ m is more than 90%.If the granularity of raw material does not have small to aforementioned range, then β-2CaOSiO 2The purity variation.Particularly, have free lime, do not dissolve remaining component and become many tendencies.
In the present invention, preferably to being used for promoting β-2CaOSiO 2Generation and the raw material allocated carries out granulation.Granulation refers to that the material forming with allotment is the operation of ball shape.Granulation preferably by granularity become 1mm～50mm, the mode that more preferably becomes 10mm～30mm by granularity carries out.
As process for granulating, can list in the rotary drum of collar plate shape and to drop into raw material and water carries out process for granulating, puts into the method etc. that what is called that raw material carries out extrusion forming is used tablets press in mould.
The usage quantity of the water that uses when granulation is preferably (0.1～0.3)/1 by the mass ratio of water/raw material, more preferably (0.15～0.25)/1.The usage quantity of water is less than 10% o'clock, and the raw material easy disintegrating of granulation burns till the situation that reaction is not fully carried out when existing in burning till in the rotary kiln.In addition, the usage quantity of water surpasses at 30% o'clock, and the raw material of the granulation moisture that becomes is big, and still avalanche easily exists in and burns till the situation that reaction is not fully carried out when burning till in the rotary kiln.Owing to contain more water in the raw material, therefore in order to make its evaporation, need a large amount of energy that burns till, thereby uneconomical, in addition, carrying capacity of environment also becomes greatly, thereby not preferred.
In the present invention, burn till with the raw material of rotary kiln after to granulation.For its temperature, need burn till for 1350 ℃～1600 ℃ with temperature of combustion, be preferably 1375 ℃～1550 ℃, more preferably 1400 ℃～1500 ℃.Temperature of combustion is during less than 1350 ℃, β-2CaOSiO 2The purity variation.Particularly, have free lime, do not dissolve remaining component and become many tendencies.Otherwise when temperature of combustion surpassed 1600 ℃, the meeting fusion was also adhered to skinning (coating) in kiln, and operation sometimes becomes difficult, sometimes β-2CaOSiO 2Mix and become significantly.In addition, it greatly also is uneconomic burning till energy.Need to prove that said temperature of combustion refers to the top temperature in the kiln among the present invention.Usually, the top temperature in the kiln is positioned near the place ahead of the flame (shape that fire is scorching) from the combustion chamber extension.
The brick that uses in the clinkering zone of rotary kiln, the material of mortar are important.Can use in the present invention and be selected from by more than the brick in the group that following (1)～(4) are formed or mortar at least a.
(1) in the high alumina refractory brick of JIS R2305 defined, Al 2O 3Containing ratio be 45～80%, be preferably 55～70%, SiO 2Containing ratio be 20～55%, be preferably silica-alumina matter brick of 30～45%.
(2) in the magnesia brick of JIS R2302 defined, the containing ratio of MgO is more than 85%, be preferably the magnesia brick more than 90%.
Under the situation of having used the brick beyond above-mentioned, β-2CaOSiO sometimes 2Production rate step-down or brick fusion and produce skinning with raw material reaction.Shape, thickness to brick are not particularly limited, and it is desirable to select according to the rotary kiln diameter brick of appropriate size.
(3) containing ratio of MgO is more than 85%, is preferably the magnesium oxide fire mortar more than 90%.
(4) in the clay matter fire mortar and high alumina matter fire mortar of JIS R2501 defined, Al 2O 3Containing ratio be 25～80%, be preferably 35～70%, SiO 2Containing ratio be 20～75%, be preferably silica-alumina matter mortar of 30～65%.
In the present invention, when using above-mentioned mortar in clinkering zone, these mortar preferably are coated with to use on the surface of the brick of the clinkering zone of rotary kiln.
The working conditions of mortar to coating is not particularly limited, and usually, the thickness of mortar is 5mm～10mm, is preferably 6mm～9mm.The amount of the water that uses in the coating is according to the kind of mortar and difference is preferably 15%～35% with respect to the mortar composition.Wherein, the amount of the water that uses in the coating is preferably 30%～35% in silica-alumina matter mortar, be preferably 15～20% in the magnesium oxide mortar.Sometimes β-2CaOSiO in the time of outside aforementioned range 2The containing ratio step-down, perhaps brick fusion and produce skinning with raw material reaction.In addition, in the cement rotary kiln purposes, brick, mortar be preferred Chrome-free all.
In the present invention, after burning till, carry out cooling operation, but cooling conditions is not particularly limited, do not carry out special quench operation and get final product.Particularly, can be based on the method for the cooling conditions of common silicate cement agglomerate, after in rotary kiln, burning till, get final product by cooling such as air-cooling system in that atmospheric environment is following.
Heat treating method is not particularly limited, can uses rotary kiln, electric furnace, tunnel furnace, shaft kiln, fluidized bed type incinerator etc.
Embodiment
Then, by embodiment and comparative example the present invention is carried out more specific description, but the present invention should not be construed as and limited by following embodiment.
" experimental example 1 "
Use a vibration jar material grinder (central chemical industry machine Co., Ltd. make), CaO raw material, SiO that compounding is following 2Raw material, Al 2O 3Composition and Fe 2O 3Composition prepares CaO/SiO as shown in table 1 2Mol ratio is 2.0 and 1000 ℃ of Al after the heating 2O 3Content and Fe 2O 3The raw material of the various prescriptions that content is different.These raw materials (are installed: small-sized dish-type granulators with tablets press; Sansho Industry Co.; Ltd. make) be that granulation makes that granularity is 10～30mm under 0.2/1 the condition at the mass ratio of water/raw material, the rotary kiln that has carried out change by the material to the clinkering zone inner face as shown in table 1 burns till under 1450 ℃.Estimate the sample of gained resultant, the result remembers in the lump in table 1.
＜rotary kiln＞
The rotary kiln that uses in experimental example of the present invention is cylindric as internal diameter 1m, length 20m's, the refractory body of the inner face of the clinkering zone of rotary kiln be brick (thickness 120mm) or in the surface coated of brick the refractory body of mortar (thickness 7mm).
The material of＜clinkering zone (material of the refractory body of the inner face of clinkering zone＞
The material of clinkering zone (1): Al 2O 3Containing ratio 60%, SiO 2The silica of containing ratio 40%-alumina matter brick (commercially available product).
The material of clinkering zone (2): the magnesia brick of MgO containing ratio 91% (commercially available product).
The material of clinkering zone (3): at the inner face of the brick of above-mentioned (1), be under 0.17 the condition with thickness 7mm coating magnesium oxide fire mortar (YOTAI REFRACTORIES CO. at the mass ratio of water/mortar, LTD makes, trade(brand)name YOTAI HEAT SET M, maximum particle diameter 0.6mm) and the material of acquisition.
The material of clinkering zone (4): at the inner face of the brick of above-mentioned (1), be under 0.33 the condition with thickness 7mm coating Al at the mass ratio of water/mortar 2O 3Containing ratio 60%, SiO 2The silica of containing ratio 40%-alumina matter fire mortar and the material that obtains.
＜use material＞
CaO raw material: limestone micropowder.CaO is that 55.4%, MgO is 0.37%, Al 2O 3Be 0.05%, Fe 2O 3Be 0.02%, and SiO 2Be 0.10%, calcination loss (1000 ℃) is 43.57%, does not detect carbon component.150 μ m percent of pass: 97.0%, 100 μ m percent of pass: 91.9%.
SiO 2Raw material: silica micro mist.CaO is that 0.02%, MgO is 0.04%, Al 2O 3Be 2.71%, Fe 2O 3Be 0.27%, SiO 2Be 95.83%, and TiO 2Be 0.23%, do not detect carbon component.Calcination loss (1000 ℃) is 0.51%, 150 μ m percent of pass: 95.1%, 100 μ m percent of pass: 90.3%.
Al 2O 3Composition: industrial alumina, purity is more than 99%.
Fe 2O 3Composition: industrial ferric oxide, purity is more than 99%.
Water: tap water.
＜measuring method＞
Carried out the various characteristics evaluation for the resultant that after burning till, obtains by following mode.
The evaluation of compound: by powder X-ray diffractometry (device: powder x-ray diffraction device (Multiplex), Rigaku Corporation manufacturing) authenticating compound.
Chemical ingredients quantitatively: with Al 2O 3Composition, Fe 2O 3Composition is analyzed according to JIS R5202 and quantitatively.
The observation of color: by the visual degree of judging white.In the room of the illumination of 200 luxs, observe, to being prepared into 3000 ± 100cm by Blain specific surface 2The white content of the powder of/g is observed.The situation of white is made as zero, the situation of yellow is made as △, the situation of brown is made as *.
Time of coagulation and compressive strength: with respect to 90 parts of ordinary Portland cements, add 10 parts of β-2CaOSiO respectively 2, γ-2CaOSiO 2Make cement composition.Use this cement composition, prepare mortar according to JIS R5201, measure finishing the time of condensing.In addition, also measured 1 day compressive strength of material age.
Table 1
Figure BDA00003551146200091
S:Strong detects with strong diffraction peak.W:Weak detects with weak diffraction peak.
β-C 2S:β-2CaO·SiO 2
" experimental example 2 "
CaO/SiO with raw material 2Mol ratio is fixed as 2.0, with Fe 2O 3Content is fixed as 0.3% and with Al 2O 3Content is fixed as 1.4%, has changed the brick of clinkering zone, the chemical constitution of mortar, in addition, carries out equally with experimental example 1.The results are shown in table 2.
The material of＜clinkering zone＞
The material of clinkering zone (5): Al 2O 3Containing ratio 45%, SiO 2The silica of containing ratio 55%-alumina matter brick (commercially available product).
The material of clinkering zone (6): Al 2O 3Containing ratio 80%, SiO 2The silica of containing ratio 20%-alumina matter brick (commercially available product).
The material of clinkering zone (7): the magnesia brick of MgO containing ratio 85% (commercially available product).
The material of clinkering zone (8): the magnesia brick of MgO containing ratio 95% (commercially available product).
The material of clinkering zone (9): Al 2O 3Containing ratio 95%, SiO 2The high purity alumina matter brick (commercially available product) of containing ratio 5%.
The material of clinkering zone (10): spinel brick (commercially available product).
The material of clinkering zone (11): at the inner face of the brick of above-mentioned (1), be under 0.17 the condition with thickness 7mm coating magnesium oxide-spinelle refractory mortar (YOTAI REFRACTORIES CO. at the mass ratio of water/mortar, LTD makes, trade(brand)name YOTAI HEAT SET M, maximum particle diameter 0.6mm) and the material of acquisition.
The material of clinkering zone (12): at the inner face of the brick of above-mentioned (1), be under 0.17 the condition with thickness 7mm coating Al at the mass ratio of water/mortar 2O 3High alumina matter mortar more than 90% (YOTAI REFRACTORIES CO., LTD make, trade(brand)name YOTAI HEAT SET M, maximum particle diameter 0.5mm) and the material that obtains.
The fire mortar of clinkering zone (13): at the inner face of the brick of above-mentioned (1), be under 0.33 the condition with thickness 7mm coating Al at the mass ratio of water/mortar 2O 3Containing ratio 25%, SiO 2The silica of containing ratio 75%-alumina matter mortar and the material that obtains.
The fire mortar of clinkering zone (14): at the inner face of the brick of above-mentioned (1), be under 0.33 the condition with thickness 7mm coating Al at the quality ratio of water/mortar 2O 3Containing ratio 45%, SiO 2The silica of containing ratio 55%-alumina matter mortar and the material that obtains.
The fire mortar of clinkering zone (15): at the inner face of the brick of above-mentioned (1), be under 0.33 the condition with thickness 7mm coating Al at the quality ratio of water/mortar 2O 3Containing ratio 80%, SiO 2The silica of containing ratio 20%-alumina matter mortar and the material that obtains.
The fire mortar of clinkering zone (16): at the inner face of the brick of above-mentioned (1), be under 0.33 the condition with thickness 7mm coating Al at the quality ratio of water/mortar 2O 3Containing ratio 90%, SiO 2The high purity alumina matter fire mortar of containing ratio 10% and the material that obtains.
The fire mortar of clinkering zone (17): at the inner face of the brick of above-mentioned (1), be under 0.33 the condition with thickness 7mm coating Al at the quality ratio of water/mortar 2O 3Containing ratio 96%, SiO 2The high purity alumina matter fire mortar of containing ratio 4% and the material that obtains.
In the expression of the material in table 2, for example " Al45 " refers to Al 2O 3Containing ratio be the material of 45% clinkering zone, " Mg85 " refers to that the containing ratio of MgO is the material of 85% clinkering zone.For other, it also is same example methodology.
Table 2
Figure BDA00003551146200111
S:Strong, detect with strong diffraction peak.W:Weak, detect with weak diffraction peak.
β-C 2S：β-2CaO·SiO 2，γ-C 2S:γ-2CaO·SiO 2
" experimental example 3 "
Carry out the comparison with prior art.As shown in table 3, will be all the time as making β-2CaOSiO 2The element of stabilization and known Fe 2O 3, Al 2O 3, BO 3, BaO, P 2O 5, SrO or MoO 3Press the ratio compounding shown in the table 3, in addition, carry out equally with experimental example 1.The results are shown in table 3.
Table 3
Figure BDA00003551146200121
S:Strong detects with strong diffraction peak.W:Weak detects with weak diffraction peak.
β-C 2S:β-2CaO·SiO 2.δ-C 2S:δ-2CaO·SiO 2
" experimental example 4 "
With CaO raw material and SiO 2The CaO/SiO of raw material 2Mol ratio changes to as shown in table 4, in addition, carries out equally with experimental example 1.The results are shown in table 4.
Table 4
Figure BDA00003551146200131
S:Strong detects with strong diffraction peak.W:Weak detects with weak diffraction peak.
β-C 2S:β-2CaO·SiO 2.α-CS:α-CaO.SiO 2·C 3S:3CaO·SiO 2
" experimental example 5 "
Thermal treatment temp is changed to as shown in table 5, in addition, carry out equally with experimental example 1.The results are shown in table 5.
Table 5
Figure BDA00003551146200141
S:Strong, detect with strong diffraction peak.W:Weak, detect with weak diffraction peak.
β-C 2S:β-2CaO·SiO 2.α-CS:α-Cao·SiO 2
" experimental example 6 "
The ratio of the water during with granulation changes to as shown in table 6, in addition, carries out equally with experimental example 1.The results are shown in table 6.
Table 6
Figure BDA00003551146200151
S:Strong detects with strong diffraction peak.W:Weak detects with weak diffraction peak.
β-C 2S:β-2CaO·SiO 2.α-CS:α-CaO·SiO 2
Utilizability on the industry
β-2CaOSiO of the present invention 2Manufacture method can make the whiteness height, also can not hinder the β-2CaOSiO of the setting and harden of cement 2, can in cement field etc., utilize on a large scale.
Need to prove, will Japanese patent application 2011-021614 number of on February 3rd, 2011 application, Japanese patent application 2011-021658 number of application on February 3rd, 2011, at Japanese patent application 2011-128708 number of application on June 8th, 2011 and quote so far at the full content of Japanese patent application 2011-172188 number specification sheets, claims and the summary of application on August 5th, 2011, include in as the disclosure of specification sheets of the present invention.

Claims (12)

1. β-2CaOSiO 2Manufacture method, it is characterized in that,
Described method is burnt till the raw material through granulation with 1350 ℃～1600 ℃ of temperature of combustion in rotary kiln, wherein,
Described rotary kiln has used at the inner face of clinkering zone and has been selected from by Al 2O 3Be 45 quality %～80 quality %, SiO 2Be silica-alumina matter brick, the Al of 20 quality %～55 quality % 2O 3Be 25 quality %～80 quality %, SiO 2Silica-alumina matter mortar, the MgO that is 20 quality %～75 quality % is that the above magnesia brick of 85 quality % and MgO are the brick more than at least a kind or the mortar in the group formed of the above magnesium oxide mortar of 85 quality %,
Described raw material through granulation obtains in the following way:
Select with CaO and SiO 2As main component, CaO/SiO 2Mol ratio be Al after 1.8～2.2,1000 ℃ of heating 2O 3With Fe 2O 3Total content less than 5 quality %, and the total content of boron, phosphorus, barium, strontium and molybdenum presses oxide compound and converts less than the raw material of 0.5 quality %,
The raw material that the granularity of raw material is counted more than the 90 quality % by 150 μ m percent of pass carries out granulation.
2. manufacture method according to claim 1, wherein, described rotary kiln uses Al in the brick of clinkering zone 2O 3Be 45 quality %～80 quality %, SiO 2It is silica-alumina matter brick of 20～55 quality %.
3. manufacture method according to claim 1, wherein, described rotary kiln is magnesium oxide mortar more than the 85 quality % at the surface coated MgO of the brick of clinkering zone.
4. manufacture method according to claim 1, wherein, described rotary kiln uses MgO in the brick of clinkering zone be magnesia brick more than the 85 quality %.
5. manufacture method according to claim 1, wherein, described rotary kiln is at the surface coated Al of the brick of clinkering zone 2O 3Be 25 quality %～80 quality %, SiO 2It is silica-alumina matter mortar of 20 quality %～75 quality %.
6. according to each the described manufacture method in the claim 1～5, wherein, the CaO/SiO of raw material 2Mol ratio be 1.9～2.1.
7. according to each the described manufacture method in the claim 1～6, wherein, the raw material after 1000 ℃ of heating contains the Fe less than 2 quality % 2O 3
8. according to each the described manufacture method in the claim 1～7, wherein, raw material has by 100 μ m percent of pass counts granularity more than the 90 quality %.
9. according to each the described manufacture method in the claim 1～8, wherein, the mass ratio that makes water/raw material is that the water of (0.1～0.3)/1 carries out granulation.
10. according to each the described manufacture method in the claim 1～9, wherein, burn till with 1400 ℃～1500 ℃ temperature of combustion.
11. according to each the described manufacture method in the claim 1,3,5～10, wherein, the thickness of the mortar on the brick surface of the clinkering zone of rotary kiln is 5mm～10mm.
12. a cement admixture, it contains the β-2CaOSiO that obtains by each the described manufacture method in the claim 1～11 2
CN201180065734.2A 2011-02-03 2011-11-11 Process for producing ss-2caosio2 Active CN103328383B (en)

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JP7341089B2 (en) * 2020-03-16 2023-09-08 太平洋セメント株式会社 B-lite clinker and its manufacturing method
CN113155072B (en) * 2021-02-09 2023-01-17 鞍钢股份有限公司 On-line detection method for thickness of ring forming material of pellet rotary kiln
JP7129530B1 (en) * 2021-08-19 2022-09-01 デンカ株式会社 Cement admixture, method for producing cement admixture, and cement composition
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