CN106283854A - A kind of method of the flyash surface precipitated crystal formula coating modification as papermaking filler - Google Patents
A kind of method of the flyash surface precipitated crystal formula coating modification as papermaking filler Download PDFInfo
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- CN106283854A CN106283854A CN201610611872.0A CN201610611872A CN106283854A CN 106283854 A CN106283854 A CN 106283854A CN 201610611872 A CN201610611872 A CN 201610611872A CN 106283854 A CN106283854 A CN 106283854A
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- Prior art keywords
- flyash
- coating modification
- precipitated crystal
- gas
- mixing
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- 239000010881 fly ash Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000011248 coating agent Substances 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 238000012986 modification Methods 0.000 title claims abstract description 15
- 230000004048 modification Effects 0.000 title claims abstract description 15
- 239000013078 crystal Substances 0.000 title claims abstract description 14
- 239000000945 filler Substances 0.000 title claims abstract description 12
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 11
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 6
- 230000005587 bubbling Effects 0.000 claims abstract description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 12
- 239000011575 calcium Substances 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 5
- 238000002715 modification method Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 3
- 238000013459 approach Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract description 2
- 239000002243 precursor Substances 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
Classifications
-
- 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
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- 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
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
-
- 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
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A kind of method that the invention discloses flyash surface precipitated crystal formula coating modification as papermaking filler.The method is with flyash as raw material, by choosing the granule of certain particle size range for modified object, under normal temperature condition by its Ca(OH)2Bottom using in solution, Bubbling method is passed through CO2Gas realizes precipitated crystal formula coating modification.Modified result shows, can form the calcium carbonate granule clad of even compact under certain condition on flyash precursor granule surface, and the whiteness of flyash improves, substantially meets the needs of paper grade (stock) filler.The high value added utilization that this technology is flyash solid waste provides new approach, provides a kind of new packing source for paper industry simultaneously.
Description
Technical field
The invention belongs to the filler modified technical field of Pulp and Paper Engineering subject, be specifically related to a kind of as papermaking filler
The method of flyash surface precipitated crystal formula coating modification.
Background technology
Flyash, as the by-product after power plant boiler coal combustion, is the solid waste discharge source, cities and towns of China's maximum
One of.The stacking of flyash will directly or indirectly cause the series of environmental problems such as air, soil, river, causes pole simultaneously
The big wasting of resources.For many years, the Chinese scholars application technology as the second resource by multiple technique study flyash, and building
Build, road, sewage disposal, mineral extract, material the many-side such as is filled with and makes a breakthrough.But there is product in the utilization in these fields
Yield is low, added value is the highest, processing procedure high in cost of production series of problems.Owing to flyash has high with paper industry filler
As the soil phase of ridge, chemical composition and unique surface hole defect structure, can be used for papermaking and be filled with.And unburnt carbon in fly ash grain,
The interference in the color development sources such as iron oxides, is allowed to whiteness only about 30%ISO, it is difficult to meets high brightness papers and is filled with (80%ISO)
Requirement, the application in papermaking filler field therefore suffers from limiting.
Gai Guosheng it is proposed that one first by flyash 40 ~ 100oUnder the conditions of C and Ca(OH)2Mixing, is being cooled to the most again
CO is used under normal temperature condition2Being neutralized, then to slurries filtration and be dried, the method mainly utilizes fine coal under the conditions of high-temperature alkaline
The change of the surface texture of ash is modified, the CO in later stage2Simply play neutralization excess amount of Ca (OH)2Complementary effect.Yu Xiaodong
Then disclose another kind of flyash discoloration method: be first completely soaked to water by the flyash of carbon content 0.1% ~ 1% and be heated to
Boiling, then passes to 200oC high temperature CO2Whiteness can be improved to 70 ~ 81%ISO, the method after being fully contacted 5 ~ 15min by gas
Application of brightening at high carbon content is necessarily retrained and it needs to provide certain hot environment.The present inventor the most once disclosed one
Kind of first high temperature carbon removal bonds PCC(winnofil with starch for adhesive again) granule to the method on fly ash grain surface, this
Procedure is slightly aobvious complicated and needs power consumption, and therefore the present invention is optimized on its basis.
Summary of the invention
The deficiency existed based on above method and one-sidedness, the present invention proposes a kind of novel powdered coal gray surface precipitated crystal formula
Coating modification method.In order under normal temperature condition, raw materials technology and scheme by low cost realizes whiteness performance and be obviously improved,
Do not destroy the original grain structure of coal ash simultaneously.
The present invention program is as follows.
A kind of method of the flyash surface precipitated crystal formula coating modification as papermaking filler, including following methods:
(1) raw material is chosen: take particle diameter flyash powder granule in 30 ~ 55 μ m as surface modification by screening of shaking
Raw material；
(2) crystallization cladding: by the flyash chosen and Ca(OH under room temperature)2The mixing suspension of solution, uniformly after mixing, is stirring
Under the conditions of mixing, it is passed through CO from the bottom of reaction vessel with Bubbling method2Gas generation precipitated crystal reacts, and after reaction, stops being passed through
CO2Gas and stirring terminate reaction；
(3) thicken standby: with clear water, reacted mixed liquor is carried out concentration adjustment, after standby as papermaking filler.
In said method, the carburizing reagent of (10 ~ 30 DEG C) under room temperature is used to realize the precipitation of calcium carbonate knot on flyash surface
Brilliant coating modification, does not use the physical-chemical reaction under other preprocess method any or hot conditions.
In said method, institute's flyash and Ca(OH)2Solute Ca(OH in solution)2Mass ratio be 0.1 ~ 3.0；Described
Flyash mass percent concentration in mixing suspension is 20% ~ 50%.
In said method, the coating modification reaction medium used is Ca(OH)2Solution, and it is passed through CO2On flyash surface
Produce precipitated crystal, be added without other any chemicals in addition.
In said method, using the gas dispersion apparatus being arranged on reaction container bottom continuous bubbling, described gas disperses
Device is the aeration board of single air inlet mouth of pipe.
In said method, described stir speed (S.S.) span of control is 100 ~ 600rpm, CO2Flow speed control is at 0.1 ~ 1.5L/
Min, the response time is 10 ~ 60min.
In said method, the flyash-calcium carbonate complex suspension obtained after having reacted is used after directly adjusting concentration
Being filled with in paper, after adjustment, mass percent concentration is 1% ~ 30%.
Compared with prior art, present invention have an advantage that
(1) raw material (flyash, Ca(OH)2And CO2) obtain conveniently, cost is relatively low, and at room temperature 10 ~ 30oCan send out under the conditions of C
Raw reaction, is applicable to varying environment；
(2) directly the precipitated crystal formula under flyash surface carries out temperate condition is coated with, and crystal shape is lamellar, needle-like or post
Shape, particle diameter 0.5 ~ 3 μm (as shown in Figure 3), the grain structure that flyash is excellent is not impacted；
(3) can be by the whiteness performance of the regulation and control final products of reaction condition, whiteness modification scope 65 ~ 86%ISO, Ke Yiman
What the different whiteness of foot required paper is filled with needs.
(4) the wet-process modified rear concentration that directly adjusts is 1% ~ 30% feeding paper machine stock mixing system, it is not necessary to add after drying,
Effectively reduce energy consumption.
(5) high value added utilization that this technology is flyash solid waste provides approach, provides for paper industry simultaneously
A kind of new packing source.
Accompanying drawing explanation
Fig. 1 is flyash surface precipitated crystal formula coating modification reaction unit schematic diagram；
Fig. 2 is fly ash grain SEM pattern before surface modification；
Fig. 3 is fly ash grain SEM pattern after surface modification.
In figure, all parts is as follows:
Agitator 1, reaction vessel 2, mixing suspension (Ca(OH)2+ flyash) 3,
Gas dispersion apparatus 4, CO2Gas tank 5, gas flow control valve 6.
Detailed description of the invention
Experimental provision as shown in Figure 1, gas dispersion apparatus 4 is in the bottom of reaction vessel 2, and reaction disperses at described gas
Mixing suspension 3 above device 4 is carried out.Described gas dispersion apparatus 4 and extraneous CO2Gas tank 5 is connected by trachea, is used for
There is provided reaction required CO2, and regulate gas flow rate by the gas flow control valve 6 on trachea.The rotor of agitator 1 simultaneously
Being in the mixing suspension 3 of reaction vessel, the stirring for course of reaction mixes, by controlling its rotation speed regulating and controlling stirring speed
Rate.
Embodiment 1
25oAccording to M under the conditions of CFlyash: MCalcium hydroxide (solute)The mass ratio of=1.0 is equipped with flyash (mean diameter 40 μm) and Ca
(OH)2Mixing suspension, and the mass concentration of flyash in mixed liquor is adjusted to 30%.Then under 400rpm stir speed (S.S.)
It is passed through CO with 0.4L/min flow velocity2Gas, after 50min, stops being passed through CO2Gas and stirring terminate reaction, its whiteness of sampling and measuring
For 73%ISO, it is filled with for copy paper after being diluted to 1% mass percent concentration with clear water.
Embodiment 2
25oAccording to M under the conditions of CFlyash: MCalcium hydroxide (solute)The mass ratio of=1.6 is equipped with flyash (about mean diameter 40 μm) and Ca
(OH)2Mixing suspension, and the mass concentration of flyash in mixed liquor is adjusted to 40%.Then under 400rpm stir speed (S.S.)
It is passed through CO with 0.1L/min flow velocity2Gas, after 30min, stops being passed through CO2Gas and stirring terminate reaction, its whiteness of sampling and measuring
For 78%ISO, it is filled with for copy paper after being diluted to 5% mass percent concentration with clear water.
Embodiment 3
25oAccording to M under the conditions of CFlyash: MCalcium hydroxide (solute)The mass ratio of=0.185 be equipped with flyash (about mean diameter 40 μm) and
Ca(OH)2Mixing suspension, and the mass concentration of flyash in mixed liquor is adjusted to 25%.Then in 300rpm stir speed (S.S.)
Under be passed through CO with 0.1L/min flow velocity2Gas, after 30min, stops being passed through CO2Gas and stirring terminate reaction, and it is white for sampling and measuring
Degree is 86%ISO, is filled with for copy paper after being diluted to 10% mass percent concentration with clear water.
Being illustrated in figure 2 fly ash grain SEM pattern before surface modification, Fig. 3 is then fly ash grain SEM after surface modification
Pattern.It can clearly be seen that the calcium carbonate that set a large amount of particle diameters in fly ash grain surface are far smaller than original coal ash particle is brilliant
Body, and present uniformly arrangement, play certain covering effect, and substantially keep grain structure, effectively complete to improve fine coal
Surface coating for the purpose of the whiteness of ash.
The above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not to the present invention
The restriction of embodiment.For those of ordinary skill in the field, can also make on the basis of the above description
The change of other multi-form or variation.Here without also cannot all of embodiment be given exhaustive.All the present invention's
Any amendment, equivalent and the improvement etc. made within spirit and principle, should be included in the protection of the claims in the present invention
Within the scope of.
Claims (5)
1. the method for flyash surface precipitated crystal formula coating modification being used as papermaking filler, it is characterised in that include with
Lower step:
Raw material is chosen: take the particle diameter flyash powder granule in 30 ~ 55 μm as the raw material of surface modification by screening of shaking；
(2) crystallization cladding: by the flyash chosen and Ca(OH under room temperature)2The mixing suspension of solution, uniformly after mixing, is stirring
Under the conditions of mixing, it is passed through CO from the bottom of reaction vessel with Bubbling method2Gas generation precipitated crystal reacts, and after reaction, stops being passed through
CO2Gas and stirring terminate reaction；
(3) thicken standby: with clear water, reacted mixed liquor is carried out concentration adjustment, after standby as papermaking filler.
Flyash surface coating modification method the most according to claim 1, it is characterised in that institute's flyash and Ca(OH)2Molten
Solute Ca(OH in liquid)2Mass ratio be 0.1 ~ 3.0；Described flyash mass percent concentration in mixing suspension is
20%~50%。
Flyash surface coating modification method the most according to claim 1, it is characterised in that use and be arranged on reaction vessel
The gas dispersion apparatus of bottom continuous bubbling, described gas dispersion apparatus is the aeration board of single air inlet mouth of pipe.
Flyash surface coating modification method the most according to claim 1, it is characterised in that described stir speed (S.S.) controls model
Enclose is 100 ~ 600rpm, CO2Flow speed control is at 0.1 ~ 1.5L/min, and the response time is 10 ~ 60min.
Flyash surface coating modification method the most according to claim 1, it is characterised in that the powder obtained after having reacted
Coal ash-calcium carbonate complex suspension is filled with for paper after directly adjusting concentration, after adjustment mass percent concentration be 1% ~
30%。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610611872.0A CN106283854B (en) | 2016-07-30 | 2016-07-30 | A kind of method of the fine coal gray surface precipitated crystal formula coating modification as papermaking filler |
| PCT/CN2016/110208 WO2018023918A1 (en) | 2016-07-30 | 2016-12-15 | Method using crystal deposition coating for modifying surface of fly ash for manufacturing paper filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610611872.0A CN106283854B (en) | 2016-07-30 | 2016-07-30 | A kind of method of the fine coal gray surface precipitated crystal formula coating modification as papermaking filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106283854A true CN106283854A (en) | 2017-01-04 |
| CN106283854B CN106283854B (en) | 2018-03-13 |
Family
ID=57663133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610611872.0A Active CN106283854B (en) | 2016-07-30 | 2016-07-30 | A kind of method of the fine coal gray surface precipitated crystal formula coating modification as papermaking filler |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106283854B (en) |
| WO (1) | WO2018023918A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109608911A (en) * | 2018-11-23 | 2019-04-12 | 华南理工大学 | A kind of fly ash base carbonization modification compounded mix preparation method being filled with for paper |
| CN114477825A (en) * | 2022-03-01 | 2022-05-13 | 徐州无废城市技术研究院有限公司 | Method for improving quality of circulating fluidized bed coal ash and reducing emission by cooperating with mineralization of carbon dioxide, modified coal ash and application of modified coal ash |
| CN115012244A (en) * | 2022-04-27 | 2022-09-06 | 六盘水师范学院 | Filler paper and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605139A (en) * | 2021-08-13 | 2021-11-05 | 江苏硕茂苏彩新材料有限公司 | Papermaking filler additive and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594185A (en) * | 2004-07-07 | 2005-03-16 | 清华大学 | Fly ash brightening method |
| CN1648051A (en) * | 2004-11-30 | 2005-08-03 | 上海耀华纳米科技有限公司 | Method for preparing crystal nucleus prefabricated nano calcium carbonate and special equipment |
| CN102532955A (en) * | 2012-01-09 | 2012-07-04 | 淮南市蓝彩环保科技有限公司 | Method for preparing nano calcium carbonate coated fly ash ultrafine powder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI126239B (en) * | 2013-12-31 | 2016-08-31 | Hannu Kuopanportti | Equipment for granulation of liquid bag |
-
2016
- 2016-07-30 CN CN201610611872.0A patent/CN106283854B/en active Active
- 2016-12-15 WO PCT/CN2016/110208 patent/WO2018023918A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594185A (en) * | 2004-07-07 | 2005-03-16 | 清华大学 | Fly ash brightening method |
| CN1648051A (en) * | 2004-11-30 | 2005-08-03 | 上海耀华纳米科技有限公司 | Method for preparing crystal nucleus prefabricated nano calcium carbonate and special equipment |
| CN102532955A (en) * | 2012-01-09 | 2012-07-04 | 淮南市蓝彩环保科技有限公司 | Method for preparing nano calcium carbonate coated fly ash ultrafine powder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109608911A (en) * | 2018-11-23 | 2019-04-12 | 华南理工大学 | A kind of fly ash base carbonization modification compounded mix preparation method being filled with for paper |
| CN114477825A (en) * | 2022-03-01 | 2022-05-13 | 徐州无废城市技术研究院有限公司 | Method for improving quality of circulating fluidized bed coal ash and reducing emission by cooperating with mineralization of carbon dioxide, modified coal ash and application of modified coal ash |
| CN115012244A (en) * | 2022-04-27 | 2022-09-06 | 六盘水师范学院 | Filler paper and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106283854B (en) | 2018-03-13 |
| WO2018023918A1 (en) | 2018-02-08 |
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