CN107724175A - A kind of heat-sensitive paper burnt kaolin production process - Google Patents
A kind of heat-sensitive paper burnt kaolin production process Download PDFInfo
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- CN107724175A CN107724175A CN201710821525.5A CN201710821525A CN107724175A CN 107724175 A CN107724175 A CN 107724175A CN 201710821525 A CN201710821525 A CN 201710821525A CN 107724175 A CN107724175 A CN 107724175A
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- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/64—Inorganic compounds
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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
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of heat-sensitive paper burnt kaolin production process, by the secondary room spiral shell classification of the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry → secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, 910 940 DEG C of the calcining heat of the dynamic lower-temperature atmosphere calcining, the 40r/min of kiln rotating speed 35, the 22Hz of First air frequency 18, the 25Hz of Secondary Air frequency 20, kiln tail material Blue Whiteness 90 92.The present invention realizes high granularity, high oil absorption amount, high covering power, fineness of grind in the calcined kaolin new product of one, and heat-sensitive layer coating weight can be effectively reduced in heat-sensitive paper precoated shet, improves paper formation degree, improves color developing effect, and overcome attached head phenomenon.
Description
Technical field
The invention belongs to calcined kaolin technical field, more particularly to a kind of producer of heat-sensitive paper calcined kaolin
Method.
Background technology
Calcined kaolin is a kind of important inorganic chemical product, is one of most wide inorganic filler of current purposes, extensively
Applied to chemical products such as rubber, plastics, papermaking, coating.With developing rapidly for industry, all trades and professions are to calcined kaolin
Whiteness, granularity, oil absorption and covering power propose increasing requirement, it is necessary to which the products of a large amount of production all sizes are to meet
The demand in different markets.Calcined kaolin products fine, become more meticulous, functionalization turn into calcined kaolin industrial development side
To.
Calcined kaolin clay filler is in paper industry, though the smoothness and glossiness of paper surface can be improved, due to forging
It is undesirable in granularity, oil absorption, covering power aspect of performance to burn kaolin, limits the application in temperature-sensitive paper product.Heat-sensitive paper
It is a kind of information recording paper for being coated with colour development material and exciting and itself developing the color through thermal signal, it is recorded different from general information
Paper, it is mainly used in thermal fax paper, POS paper, ATM cash register bar, supermarket's consumption receipt, lottery ticket paper etc..
Heat-sensitive paper consumption figure is increased with average annual 20% or so speed in recent years, and to 2016, the annual consumption of heat-sensitive paper was
Through more than 300,000 tons, and loading of the calcined kaolin in temperature-sensitive paper and coating can reach 30%-50%, have great market price
Value.Current high granularity, high oil absorption amount, high covering, low fineness of grind are in integral calcined kaolin there is not yet industrialized production report
Lead, the calcined kaolin applied to heat-sensitive paper belongs to blank at home, develops such product for exploiting market and enterprise
Benefit will play the effect of greatly facilitating.
The content of the invention
In order to solve the not high problem of index present in existing calcined kaolin production technology in the prior art, the present invention is public
Opened a kind of heat-sensitive paper burnt kaolin production process, it is desirable to provide one kind collect high granularity, high oil absorption amount, high covering power,
Low fineness of grind can reduce heat-sensitive paper heat-sensitive layer coating weight, improve paper formation degree, improve color developing effect, effectively in one
Overcome the heat-sensitive paper coated filler of attached head phenomenon.
The present invention is achieved through the following technical solutions：
By the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying
The secondary room spiral shell classification of → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry →
Secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, it is described dynamic
900-948 DEG C of the calcining heat of state lower-temperature atmosphere calcining, kiln rotating speed 35-40r/min, First air frequency 18-22Hz, Secondary Air frequency
Rate 20-25Hz, kiln tail material Blue Whiteness 90-92；Preferably, the calcining heat 910-940 of the dynamic lower-temperature atmosphere calcining
℃。
Ore hand sorting is carried out to gangue or coal series kaolin rock before dispensing, rejects the non-Raolinites such as carbon block, sandstone, clay
Impurity, water-filling of going forward side by side are washed away except impurity such as clays, and the flour material removed in raw ore is sieved using rod.
The loss on ignition 15.3%-17.6%, SiO of raw ore after the dispensing2Content 44.8%-46.6%, Al2O3Content 37%-
41%, control Fe2O3≤ 0.5%, TiO2≤1.0%。
By gangue or coal series kaolin rock after crushing and being ground into 3-7cm powder agglomates, this broken process can use
Jaw crusher is crushed, and an iron removaling is carried out by electric magnetic iron remover, and electric magnetic iron remover can be arranged on to broken rear FU
Above conveyer belt, for rejecting the magnetisable material in impurity iron and mineral in process.
After the dry grinding milling, primary raw materials of 325 screen residues 15-20% is obtained, Europe version can be used to grind
It is milled.
As a kind of preferred embodiment, the solvent of the slurrying is formed by pure water, running water and dispersant
, the mass ratio of pure water, running water and dispersant is 1：（7 - 8）：（0.06 - 0.07）, the solvent and primary raw materials are pressed
Mass ratio（1.45 - 1.55）：1, the high concentration slurry that solid content is 40 ± 1% is mixed to get, the dispersant is hexa metaphosphoric acid
One or more in sodium, sodium pyrophosphate, Sodium Polyacrylate；Pulping with high density improves the operating efficiency of wet milling device, reduces
Ton production cost.
As a kind of preferred embodiment, wet-milling can use Ball-stirring mill to carry out high-strength mechanical shearing to high concentration slurry
Ultra-fine grinding, the slurry granularity after wet-milling（-2μm, %）>=90%, 325 screen residue≤0.01%, slurry viscosity 230-460
mPa·s；Slurry solid content after wet-milling is adjusted to 30 ± 1% slurry, carries out secondary room spiral shell classification and secondary disk successively
Classification, obtains granularity（-0.5μm, %）>=60%,（-2μm, %）>=93.5%,（-5μm,%）>=99.5% slurry.
Slurry after secondary disk classification is controlled granularity by a pressure-filteration drying dehydration and secondary spray drying（-2μ
m, %）After >=92.5% spraying slurry carries out secondary spray drying, material moisture≤0.5% of gained, improve the thermal efficiency and preceding beat
Dissipate efficiency.
As a kind of preferred embodiment, first the progress depolymerization of dried material is beaten before the calcining of dynamic lower-temperature atmosphere
Dissipate, and use bar magnet iron removaling, it is 0.150-0.165g/ml to control unit weight；To calcined product after the calcining of dynamic lower-temperature atmosphere
Depolymerization classification is carried out to break up, while using bar magnet iron removaling ,-the 38Hz of scattering and grading frequency 35 after control, blower fan frequency 43-
45Hz, join wind 10cm, screen residue≤0.002% of product 400, dispersiveness≤55 μm, fineness of grind≤12.5 μm.
The present invention by using with ore deposit, dry and wet mill, classification, it is preceding break up depolymerization improve powder particles；Calcining heat is using low
Temperature calcining drops to 900-948 DEG C by original 1100-1150 DEG C, reduces the sintering hard aggregation of powder, forms more sky
Gap structure, allow white material after calcining to be in rarefaction, improve oil absorption；Using dynamic lower-temperature atmosphere calcining technology, pass through control one
Secondary Air frequency adjusts O in calcining kiln2、CO2, ratio of the CO concentration in atmosphere is calcined, solve low temperature calcination product whiteness it is inclined
The problem of red phase, while the reduction of powder sintering is easier to be classified depolymerization, the portion that will be formed in calcination process in low temperature calcination
Divide bulky grain to break up, calcination product is recovered superfine powdery, effectively control product granularity, calcined kaolin is had stronger scattering
Effect, greatly improves covering power.
The modified technique of the present invention carries out heat-sensitive paper and produced with calcined kaolin, and its calcined kaolin granularity is by original（-
2μm）82-84%, D (4,3)≤4.8 μm, lifting is arrived（-2μm）88 - 89%、D(4,3)≤3.7μm；Oil absorption is by 68-70
78-82 g/100g are arrived in g/100g liftings；Covering power by original 2.0-3.5 lifting to 5.5-6.5, realize high granularity,
High oil absorption amount, high covering power, low fineness of grind are applied in heat-sensitive paper precoated shet, had in the calcined kaolin new product of one
Effect reduces heat-sensitive layer coating weight, from 7- 9g/m2Drop to 3- 5g/m2, color development O.D values 1.1-1.31, color developing effect is clear, changes
Kind paper formation degree, and overcome attached head phenomenon.
Embodiment
Describe to be used to disclose the present invention below so that those skilled in the art can realize the present invention.It is excellent in describing below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
Embodiment 1
By the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying
The secondary room spiral shell classification of → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry →
Secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, it is described dynamic
910 DEG C of the calcining heat of state lower-temperature atmosphere calcining, kiln rotating speed 35r/min, First air frequency 18Hz, Secondary Air frequency 20Hz, kiln
Tail material Blue Whiteness 90.
Ore hand sorting is carried out to gangue or coal series kaolin rock before dispensing, rejects the non-Raolinites such as carbon block, sandstone, clay
Impurity, water-filling of going forward side by side are washed away except clay impurity, and dispensing is carried out after sieving the flour material removed in raw ore using rod；It is former after dispensing
The loss on ignition 15.3% of ore deposit, SiO2Content 44.8%, Al2O3Content 37%, control Fe2O3≤ 0.5%, TiO2≤1.0%。
Using jaw crusher by gangue or coal series kaolin rock by it is broken be ground into 3-7cm powder agglomates after, by setting
Put the electric magnetic iron remover above broken rear FU conveyer belts and carry out an iron removaling, for rejecting impurity iron and ore deposit in process
Magnetisable material in thing；Then after carrying out dry grinding milling using Europe version mill, the primary for obtaining 325 screen residues in 15-17% is former
Material.
The solvent of the slurrying is formed by pure water, running water and dispersant, pure water, running water and dispersant
Mass ratio be 1：7.0：0.06, the solvent and primary raw materials in mass ratio 1.45：1, it is 40.8% to be mixed to get solid content
High concentration slurry, the dispersant are calgon；Pulping with high density improves the operating efficiency of wet milling device, reduces ton
Production cost.
Wet-milling can use Ball-stirring mill to carry out high-strength mechanical shearing ultra-fine grinding, the slurry after wet-milling to high concentration slurry
Granularity（-2μm, %）For 90%, 325 screen residues are 0.008-0.01%, slurry viscosity 230mPas；By slurry after wet-milling
Solid content is adjusted to 30 ± 1%, carries out secondary room spiral shell classification and the classification of secondary disk successively, obtains granularity（-0.5μm,%）For 60-
62%,（-2μm,%）For 94.8-95.0%,（-5μm, %）For 99.5-99.7% slurry；Slurry after secondary disk classification passes through
Pressure-filteration drying dehydration and secondary spray drying, are controlled granularity（-2μm, %）Two are carried out for 93.5-94.2% spraying slurry
After secondary spray drying, the material moisture of gained is 0.3-0.5%, improves the thermal efficiency and before breaks up efficiency.
First depolymerization is carried out before the calcining of dynamic lower-temperature atmosphere to dried material to break up, and uses bar magnet iron removaling, control
Unit weight processed is 0.150g/ml；Depolymerization classification is carried out to calcined product after the calcining of dynamic lower-temperature atmosphere to break up, while uses magnet
Rod iron removaling, scattering and grading frequency 35Hz after control, blower fan frequency 43Hz, ginseng wind 10cm, screen residue≤0.002% of product 400,
Dispersiveness≤55 μm, 10-12.5 μm of fineness of grind.
Its calcined kaolin granularity is（-2μm）88-89%、D(4,3)≤3.7μm；Oil absorption 79-82g/100g；Covering power
5.5-5.8, realize high granularity, high oil absorption amount, high covering power, low fineness of grind in one calcined kaolin new product,
Applied in heat-sensitive paper precoated shet, the heat-sensitive layer coating weight is 3-3.5g/m2, color development O.D value 1.1-1.25, color developing effect is clear
It is clear, paper formation degree is effectively improved, and overcome attached head phenomenon.
Embodiment 2
By the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying
The secondary room spiral shell classification of → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry →
Secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, it is described dynamic
940 DEG C of the calcining heat of state lower-temperature atmosphere calcining, kiln rotating speed 40r/min, First air frequency 22Hz, Secondary Air frequency 25Hz, kiln
Tail material Blue Whiteness 92.
Ore hand sorting is carried out to gangue or coal series kaolin rock before dispensing, rejects the non-Raolinites such as carbon block, sandstone, clay
Impurity, water-filling of going forward side by side are washed away except clay impurity, and dispensing is carried out after sieving the flour material removed in raw ore using rod；It is former after dispensing
The loss on ignition 17.6% of ore deposit, SiO2Content 46.6%, Al2O3Content 41%, control Fe2O3≤ 0.5%, TiO2≤1.0%。
Using jaw crusher by gangue or coal series kaolin rock by it is broken be ground into 3-7cm powder agglomates after, pass through
Be arranged on it is broken after electric magnetic iron remover above FU conveyer belts carry out an iron removaling, for reject the impurity iron in process and
Magnetisable material in mineral；Then after carrying out dry grinding milling using Europe version mill, primary of 325 screen residues 16-20% is obtained
Raw material.
The solvent of the slurrying is formed by pure water, running water and dispersant, pure water, running water and dispersant
Mass ratio be 1：8.0：0.07, the solvent and primary raw materials in mass ratio 1.55：1, it is 39.2% to be mixed to get solid content
High concentration slurry, the dispersant are the one or more in calgon, sodium pyrophosphate, Sodium Polyacrylate；High concentration system
Slurry improves the operating efficiency of wet milling device, reduces a ton production cost.
Wet-milling can use Ball-stirring mill to carry out high-strength mechanical shearing ultra-fine grinding, the slurry after wet-milling to high concentration slurry
Granularity（-2μm, %）For 91.5%, 325 screen residue≤0.01%, the mPas of slurry viscosity 460；Slurry after wet-milling is contained admittedly
Amount is adjusted to 30 ± 1%, carries out secondary room spiral shell classification and the classification of secondary disk successively, obtains granularity（-0.5μm, %）For 63-
65%,（-2μm,%）For 95.0-95.5%,（-5μm,%）For 99.6-99.8% slurry；Slurry after secondary disk classification passes through
Pressure-filteration drying dehydration and secondary spray drying, are controlled granularity（-2μm,%）94.0-94.2% spraying slurry carries out secondary spray
Mist is dried, and the material moisture of gained is 0.2-0.5%, is improved the thermal efficiency and is before broken up efficiency.
First depolymerization is carried out before the calcining of dynamic lower-temperature atmosphere to dried material to break up, and uses bar magnet iron removaling, control
Unit weight processed is 0.165g/ml；Depolymerization classification is carried out to calcined product after the calcining of dynamic lower-temperature atmosphere to break up, while uses magnet
Rod iron removaling, scattering and grading frequency 38Hz after control, blower fan frequency 45Hz, ginseng wind 10cm, screen residue≤0.002% of product 400,
Dispersiveness≤55 μm, 10-12.5 μm of fineness of grind.
Its calcined kaolin granularity（-2μm）88-89%, D (4,3) is 3.5-3.7 μm；Oil absorption 78-79.2 g/
100g；Covering power is 5.7-6.2, and it is high in the calcining of one to realize high granularity, high oil absorption amount, high covering power, low fineness of grind
Ridge soil new product, is applied in heat-sensitive paper precoated shet, and the heat-sensitive layer coating weight is 4.2-5 g/m2, color development O.D values 1.2-
1.31, color developing effect is clear, effectively improves paper formation degree, and overcomes attached head phenomenon.
Embodiment 3
By the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying
The secondary room spiral shell classification of → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry →
Secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, it is described dynamic
900 DEG C of the calcining heat of state lower-temperature atmosphere calcining, kiln rotating speed 35-37r/min, First air frequency 18-19Hz, Secondary Air frequency
20-22Hz, kiln tail material Blue Whiteness 90.
Ore hand sorting is carried out to gangue or coal series kaolin rock before dispensing, rejects the non-Raolinites such as carbon block, sandstone, clay
Impurity, water-filling of going forward side by side are washed away except clay impurity, and dispensing is carried out after sieving the flour material removed in raw ore using rod；It is former after dispensing
The loss on ignition 15.7% of ore deposit, SiO2Content 45.8%, Al2O3Content 39%, control Fe2O3≤ 0.5%, TiO2≤1.0%。
Using jaw crusher by gangue or coal series kaolin rock by it is broken be ground into 3-7cm powder agglomates after, by setting
Put the electric magnetic iron remover above broken rear FU conveyer belts and carry out an iron removaling, for rejecting impurity iron and ore deposit in process
Magnetisable material in thing；Then after carrying out dry grinding milling using Europe version mill, the primary for obtaining 325 screen residues in 16-17% is former
Material.
The solvent of the slurrying is formed by pure water, running water and dispersant, pure water, running water and dispersant
Mass ratio be 1：7.0：0.06, the solvent and primary raw materials in mass ratio 1.45：1, it is 40.8% to be mixed to get solid content
High concentration slurry, the dispersant are calgon；Pulping with high density improves the operating efficiency of wet milling device, reduces ton
Production cost.
Wet-milling can use Ball-stirring mill to carry out high-strength mechanical shearing ultra-fine grinding, the slurry after wet-milling to high concentration slurry
Granularity（-2μm,%）For 92%, 325 screen residues are 0.008-0.009%, slurry viscosity 240-250mPas；It will be ground after wet-milling
Defibrination solid content is adjusted to 30 ± 1%, carries out secondary room spiral shell classification and the classification of secondary disk successively, obtains granularity（-0.5μm,%）
For 62-65%,（-2μm,%）For 94.5-95.0%,（-5μm,%）For 99.5-99.8% slurry；Slurry after secondary disk classification
By a pressure-filteration drying dehydration and secondary spray drying, control granularity（-2μm,%）Progress is starched for 94.0-94.5% spraying
After secondary spray drying, the material moisture of gained is 0.3-0.5%, improves the thermal efficiency and before breaks up efficiency.
First depolymerization is carried out before the calcining of dynamic lower-temperature atmosphere to dried material to break up, and uses bar magnet iron removaling, control
Unit weight processed is 0.160-0.165g/ml；Depolymerization classification is carried out to calcined product after the calcining of dynamic lower-temperature atmosphere to break up, is adopted simultaneously
With bar magnet iron removaling, scattering and grading frequency 36Hz after control, blower fan frequency 43Hz, ginseng wind 10cm, the screen residue of product 400≤
0.002%, dispersiveness≤55 μm, 8.5-12.5 μm of fineness of grind.
Its calcined kaolin granularity is（-2μm）88 - 89%、D(4,3)≤3.7μm；The g/100g of oil absorption 78-80；
Covering power 5.7-6.0, realize high granularity, high oil absorption amount, high covering power, low fineness of grind and newly produced in the calcined kaolin of one
Product, applied in heat-sensitive paper precoated shet, the heat-sensitive layer coating weight is the g/m of 3.2- 3.52, color development O.D values 1.1-1.25,
Color developing effect is clear, effectively improves paper formation degree, and overcomes attached head phenomenon.
Embodiment 4
By the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying
The secondary room spiral shell classification of → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry →
Secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, it is described dynamic
948 DEG C of the calcining heat of state lower-temperature atmosphere calcining, kiln rotating speed 40r/min, First air frequency 22Hz, Secondary Air frequency 25Hz, kiln
Tail material Blue Whiteness 92.
Ore hand sorting is carried out to gangue or coal series kaolin rock before dispensing, rejects the non-Raolinites such as carbon block, sandstone, clay
Impurity, water-filling of going forward side by side are washed away except clay impurity, and dispensing is carried out after sieving the flour material removed in raw ore using rod；It is former after dispensing
The loss on ignition 17.6% of ore deposit, SiO2Content 46.6%, Al2O3Content 41%, control Fe2O3≤ 0.5%, TiO2≤1.0%。
Using jaw crusher by gangue or coal series kaolin rock by it is broken be ground into 3-7cm powder agglomates after, pass through
Be arranged on it is broken after electric magnetic iron remover above FU conveyer belts carry out an iron removaling, for reject the impurity iron in process and
Magnetisable material in mineral；Then after carrying out dry grinding milling using Europe version mill, primary of 325 screen residues 16-20% is obtained
Raw material.
The solvent of the slurrying is formed by pure water, running water and dispersant, pure water, running water and dispersant
Mass ratio be 1：8.0：0.07, the solvent and primary raw materials in mass ratio 1.55：1, it is 39.2% to be mixed to get solid content
High concentration slurry, the dispersant are the one or more in calgon, sodium pyrophosphate, Sodium Polyacrylate；High concentration system
Slurry improves the operating efficiency of wet milling device, reduces a ton production cost.
Wet-milling can use Ball-stirring mill to carry out high-strength mechanical shearing ultra-fine grinding, the slurry after wet-milling to high concentration slurry
Granularity（-2μm, %）For 91.5%, 325 screen residue≤0.01%, the mPas of slurry viscosity 460；Slurry after wet-milling is contained admittedly
Amount is adjusted to 30 ± 1%, carries out secondary room spiral shell classification and the classification of secondary disk successively, obtains granularity（-0.5μm, %）For 63-
65%,（-2μm, %）For 94.5-95.5%,（-5μm, %）For 99.5-99.9% slurry；Slurry after secondary disk classification leads to
A pressure-filteration drying dehydration and secondary spray drying are crossed, is controlled granularity（-2μm, %）93.5-94.2% spraying slurry carries out two
Secondary spray drying, the material moisture of gained is 0.3-0.4%, improves the thermal efficiency and before breaks up efficiency.
First depolymerization is carried out before the calcining of dynamic lower-temperature atmosphere to dried material to break up, and uses bar magnet iron removaling, control
Unit weight processed is 0.165g/ml；Depolymerization classification is carried out to calcined product after the calcining of dynamic lower-temperature atmosphere to break up, while uses magnet
Rod iron removaling, scattering and grading frequency 38Hz after control, blower fan frequency 45Hz, ginseng wind 10cm, screen residue≤0.002% of product 400,
Dispersiveness≤55 μm, 10-12.5 μm of fineness of grind.
Its calcined kaolin granularity（-2μm）88-89%, D (4,3) is 3.5-3.7 μm；Oil absorption 78-81.3 g/
100g；Covering power is 5.7-5.9, and it is high in the calcining of one to realize high granularity, high oil absorption amount, high covering power, low fineness of grind
Ridge soil new product, is applied in heat-sensitive paper precoated shet, and the heat-sensitive layer coating weight is 4.5-5 g/m2, color development O.D values 1.25-
1.31, color developing effect is clear, effectively improves paper formation degree, and overcomes attached head phenomenon.
Embodiment 5
By the gangue after ion or coal series kaolin rock → sieving → dispensing → broken → iron removaling → dry grinding → slurrying
The secondary room spiral shell classification of → secondary iron removaling → wet-milling → with slurry → mono- → secondary disk be classified → pressure-filtering dehydration drying → into slurry →
Secondary spray drying → preceding break up depolymerization → dynamic lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, it is described dynamic
925 DEG C of the calcining heat of state lower-temperature atmosphere calcining, kiln rotating speed 35- 40r/min, First air frequency 19-22Hz, Secondary Air frequency
20-25Hz, kiln tail material Blue Whiteness 90-92.
Ore hand sorting is carried out to gangue or coal series kaolin rock before dispensing, rejects the non-Raolinites such as carbon block, sandstone, clay
Impurity, water-filling of going forward side by side are washed away except clay impurity, and dispensing is carried out after sieving the flour material removed in raw ore using rod；It is former after dispensing
The loss on ignition 15.8%-16.6%, SiO of ore deposit2Content 45.2% -46.0%, Al2O3Content 38% -40%, control Fe2O3≤ 0.5%,
TiO2≤1.0%。
Using jaw crusher by gangue or coal series kaolin rock by it is broken be ground into 3-7cm powder agglomates after, by setting
Put the electric magnetic iron remover above broken rear FU conveyer belts and carry out an iron removaling, for rejecting impurity iron and ore deposit in process
Magnetisable material in thing；Then after carrying out dry grinding milling using Europe version mill, the primary for obtaining 325 screen residues 16-18% is former
Material.
The solvent of the slurrying is formed by pure water, running water and dispersant, pure water, running water and dispersant
Mass ratio be 1：7.6：0.063, the solvent and primary raw materials in mass ratio 1.51：1, solid content is mixed to get as 39.8%
High concentration slurry, the dispersant is calgon, sodium pyrophosphate, the one or more in Sodium Polyacrylate；High concentration
Slurrying improves the operating efficiency of wet milling device, reduces a ton production cost.
Wet-milling can use Ball-stirring mill to carry out high-strength mechanical shearing ultra-fine grinding, the slurry after wet-milling to high concentration slurry
Granularity（-2μm, %）>=90%, 325 screen residues are 0.007-0.01, slurry viscosity 300-410 mPas；It will be ground after wet-milling
Defibrination solid content is adjusted to 30 ± 1%, carries out secondary room spiral shell classification and the classification of secondary disk successively, obtains granularity（-0.5μm, %）
>=60%,（-2μm,%）>=94.0%,（-5μm,%）>=99.7-99.8% slurry；Slurry after secondary disk classification passes through once
Pressure-filteration drying is dehydrated and secondary spray drying, controls granularity（-2μm, %）It is dry that >=93.5% spraying slurry carries out secondary spraying
It is dry, material moisture≤0.5% of gained, improve the thermal efficiency and before break up efficiency.
First depolymerization is carried out before the calcining of dynamic lower-temperature atmosphere to dried material to break up, and uses bar magnet iron removaling, control
Unit weight processed is 0.150-0.160g/ml；Depolymerization classification is carried out to calcined product after the calcining of dynamic lower-temperature atmosphere to break up, is adopted simultaneously
With bar magnet iron removaling,-the 38Hz of scattering and grading frequency 35 after the control, -45Hz of blower fan frequency 43, join wind 10cm, the mesh of product 400
Residue on sieve 0.002%, 45-50 μm of dispersiveness, 10-12.5 μm of fineness of grind.
Its calcined kaolin granularity is（-2μm）88 - 89%、D(4,3)≤3.7μm；Oil absorption is 78-80.5 g/
100g；Covering power is 5.8-6.5, realizes high granularity, high oil absorption amount, high covering power, low fineness of grind in the calcining of one
Kaolin new product, applied in heat-sensitive paper precoated shet, the heat-sensitive layer coating weight is 3.3-3.6 g/m2, color development O.D values
1.18-1.31, color developing effect is clear, effectively improves paper formation degree, and overcomes attached head phenomenon.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, that described in above-described embodiment and specification is the present invention
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appended claims and its
Equivalent defines.
Claims (9)
- A kind of 1. heat-sensitive paper burnt kaolin production process, it is characterised in that：By the gangue or coal measures after ion The secondary room of Raolinite → sieving → dispensing → broken → iron removaling → dry grinding → slurrying → secondary iron removaling → wet-milling → with slurry → mono- Spiral shell classification → secondary disk is classified → pressure-filtering dehydration drying → into slurry → secondary spray drying → preceding and breaks up depolymerization → dynamic Lower-temperature atmosphere calcining → after break up depolymerization classification → product；Wherein, the calcining heat 900-948 of the dynamic lower-temperature atmosphere calcining DEG C, kiln rotating speed 35-40r/min, First air frequency 18-22Hz, Secondary Air frequency 20-25Hz, kiln tail material Blue Whiteness 90- 92。
- 2. production method as claimed in claim 1, it is characterised in that：The loss on ignition 15.3% of raw ore after the dispensing- 17.6%, SiO2Content 44.8% -46.6%, Al2O3Content 37% -41%, control Fe2O3≤ 0.5%, TiO2≤1.0%。
- 3. production method as claimed in claim 1, it is characterised in that：Gangue or coal series kaolin rock are ground into by broken After 3-7cm powder agglomates, an iron removaling is carried out by electric magnetic iron remover.
- 4. production method as claimed in claim 1, it is characterised in that：After the dry grinding milling, 325 screen residues are obtained In 15-20% primary raw materials.
- 5. production method as claimed in claim 4, it is characterised in that：The solvent of the slurrying be by pure water, running water and What dispersant formed, the mass ratio of pure water, running water and dispersant is 1：（7 - 8）：（0.06 - 0.07）, it is described molten Agent and primary raw materials are in mass ratio（1.45 - 1.55）：1, solid content is mixed to get as 40 ± 1% high concentration slurry, described point Powder is the one or more in calgon, sodium pyrophosphate, Sodium Polyacrylate.
- 6. production method as claimed in claim 1, it is characterised in that：Slurry granularity after wet-milling（-2μm, %）>=90%, 325 screen residue≤0.01%, the mPas of slurry viscosity 230-460；Slurry solid content after wet-milling is adjusted to 30 ± 1%, Secondary room spiral shell classification and the classification of secondary disk are carried out successively, obtain granularity（-0.5μm, %）>=60%,（-2μm, %）>=94.5%, （-5μm,%）>=99.5% slurry.
- 7. production method as claimed in claim 1, it is characterised in that：By granularity（-2μm, %）>=93.5% spraying slurry is carried out Secondary spray drying, material moisture≤0.5% of gained.
- 8. production method as claimed in claim 1, it is characterised in that：First to dried thing before the calcining of dynamic lower-temperature atmosphere Material carries out depolymerization and broken up, and uses bar magnet iron removaling, and it is 0.150-0.165g/ml to control unit weight；Calcined in dynamic lower-temperature atmosphere Depolymerization classification is carried out to calcined product afterwards to break up, while uses bar magnet iron removaling, scattering and grading frequency 35-38Hz, wind after control Unit frequency 43-45Hz, join wind 10cm, screen residue≤0.002% of product 400, dispersiveness≤55 μm, fineness of grind≤12.5 μm.
- 9. the production method as described in any in claim 1-8, it is characterised in that：The calcining of the dynamic lower-temperature atmosphere calcining 910-940 DEG C of temperature.
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| CN108910906A (en) * | 2018-09-30 | 2018-11-30 | 江门市精达云母材料有限公司 | A kind of system of processing of mica powder |
| CN108976846A (en) * | 2018-09-30 | 2018-12-11 | 江门市精达云母材料有限公司 | A kind of processing technology of mica powder |
| CN112516984A (en) * | 2020-12-23 | 2021-03-19 | 山西晋坤矿产品股份有限公司 | Method for preparing high-activity petroleum catalytic cracking catalyst by utilizing coal gangue |
| CN114837014A (en) * | 2022-03-30 | 2022-08-02 | 哈工大机器人集团(杭州湾)国际创新研究院 | Preparation method of clay compound for carbonless copy paper |
| CN115744927A (en) * | 2022-11-16 | 2023-03-07 | 山西金宇科林科技有限公司 | Coal gangue kaolin refining processing method |
| CN116041985A (en) * | 2023-01-04 | 2023-05-02 | 山西金宇科林科技有限公司 | Energy-saving production method of superfine calcined kaolin |
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