CN102561086A - Method for preparing spindle crystal form alkali recovery white clay - Google Patents
Method for preparing spindle crystal form alkali recovery white clay Download PDFInfo
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- CN102561086A CN102561086A CN2012100441363A CN201210044136A CN102561086A CN 102561086 A CN102561086 A CN 102561086A CN 2012100441363 A CN2012100441363 A CN 2012100441363A CN 201210044136 A CN201210044136 A CN 201210044136A CN 102561086 A CN102561086 A CN 102561086A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention discloses a method for preparing spindle crystal form alkali recovery white clay. Digestion reaction and caustification reaction are separately controlled; a green solution is divided into two parts for the digestion reaction and the caustification reaction respectively; the spindle crystal form alkali recovery white clay is obtained by selecting the raw material quality, optimizing the digestion and caustification reaction technology and preferably selecting and reasonably using a crystal form control agent; and the performance and the quality of the white clay are promoted, and the white clay can meet the requirements of medium and high-grade culture paper for filler performance. By the method, the problem about environmental pollution of the white clay is solved, a filler raw material is provided for the papermaking industry, the requirement of the papermaking filler market is met, and an effect of changing waste into valuable is achieved; and the method has considerable economic benefits. Moreover, the method promotes the comprehensive utilization technology of the alkali recovery white clay, and is helpful for sustainable development of the papermaking industry.
Description
Technical field
The present invention relates to a kind of method for preparing spindle crystalline form alkali recovery white slime, belong to alkali recovery white slime comprehensive utilization technique field, the spindle crystalline form alkali recovery white slime of preparation, the inorganic filler that is suitable as medium-to-high grade cultural paper is used.
Background technology
White clay is that alkali reclaims in the causticizing reaction process by green liquor (main component Na
2Co
3) and quick lime (main component CaO) digest with causticizing reaction after the solid sediment that generates (main component is CaCo
3), be also referred to as alkali recovery white slime, be a kind of solid waste, belong to high-alkali secondary pollution.The large-scale enterprises in pulp and paper industry that with timber is raw material both at home and abroad all adopts the limekiln calcination method to make alkali recovery white slime regeneration quick lime, in causticization, recycles.Yet with the non-wood-fiber is the enterprises in pulp and paper industry of raw material, and its white clay reclaims alkali has serious silicon to disturb, and is difficult for taking the calcination method reuse, and in addition, the calcination method energy consumption is high, and equipment investment is big, and production cost is high, only is applicable to large-scale enterprises in pulp and paper industry.The most papermaking enterprises of China carry out landfill or stacking to alkali recovery white slime, and some selection enters rivers, causes environmental pollution, must pay huge charges for disposing pollutants simultaneously, has increased the enterprise production cost, and has caused the waste of resource.
According to domestic and foreign literature; One of purposes of alkali recovery white slime is to can be used as the paper grade (stock) inorganic filler, has both solved the problem of environment pollution caused of white clay, can be paper industry again filler material is provided; Satisfy the needs in papermaking filler market, reach the effect that turns waste into wealth.The production cost of alkali recovery white slime is about 1/3 of commodity precipitated calcium carbonate, and reuse has considerable economic benefit as papermaking filler.
In the prior art, because the crystalline form of alkali recovery white slime is amorphous or cube shaped, rather than the spindle crystalline structure of commodity precipitated calcium carbonate (PCC).When making culture and use paper wadding, exist retention low, problem such as poor optical properties and physical property are not good with its.
Is the developing direction of alkali recovery white slime purification techniques as papermaking filler and quality near commodity spindle PCC level.In recent years, China number man papermaking enterprise is back to paper production line with alkali recovery white slime, and the alkali recovery white slime of reuse grinds subsequent treatment preparations such as Xie Xu.Mostly the crystalline form of China's alkali recovery white slime is impalpable structure; Few part also has cubical; Very big with the spindle aggregation difference of commodity PCC; Cause that it is kept, water filtering performance and application performance be poor, this has seriously restricted papermaking waste-alkali recovery white slime Treatment Technology progress and application process.
Therefore, how preparing the alkali recovery white slime with spindle crystalline structure, is the problem that papermaking industry engineers and technicians demand developmental research urgently.
In the last few years; China papermaking industry engineers and technicians have done a large amount of research and developments to the processing and the utilization thereof of alkali recovery white slime; But mainly concentrate on the subsequent treatment of white clay; Like aspects such as washing, dealkalize, grinding Xie Xuhe dehydrate, and relate to rarely having aspect the crystalline form control, disclose by following patent documentation:
1, Chinese invention patent open (bulletin) number 101700901A, on May 05th, 2010 open (bulletin) day, " a kind of new method of utilizing the paper industry alkali recovery white slime to prepare precipitated calcium carbonate " specification disclosed its technical scheme employing
FourThe mode of section causticization and overflow causticizing reaction; In the 3rd section and the 4th section causticizing reaction, add the crystal controlling agent; This crystal controlling agent has changed the calcium carbonate lattice paprmeter; Make crystal diameter and type can arrive the requirement of artificial setting, the precipitated calcium carbonate crystal size of processing is even, has abandoned grinding technique.
2., do not describe used crystal control agent 1., processing step is complicated but the weak point that the method exists is:,, be difficult to implement; 3. the concrete crystalline form of used crystal control agent and prepared precipitated calcium carbonate is not described; Because the calcium carbonate crystalline form has kind more than ten; Amorphous, spherical, aciculiform, bar-shaped, chain, spindle and cube etc.; And crystalline form is the critical index of calcium carbonate performance, and the precipitated calcium carbonate performance difference of different crystal forms is very big, and application performance is different with effect.
2, Chinese invention patent open (bulletin) number 102303885A; " a kind of careless type of slurrying alkali reclaims the method for the refining white mud calcium carbonate of green liquor " specification disclosed alkali and reclaimed the method that green liquor is made with extra care white mud calcium carbonate open (bulletin) day on January 04th, 2012; Adopt the clear water assimilation of quicklime using; With digestion reaction and separately control of causticizing reaction, control material ratio, reaction temperature and speed of agitator, prepared calcium carbonate is aciculiform
.
Its weak point: this important reaction factor of not mentioned reaction time in this invention; Do not add crystal control agent in the preparation process; The crystalline form of prepared calcium carbonate is an aciculiform.
Summary of the invention
The object of the invention; The weak point that purport exists to above-mentioned prior art; A kind of method for preparing spindle crystalline form alkali recovery white slime is proposed, the spindle crystalline form alkali recovery white slime of this method preparation, its quality level is near the quality level of commodity PCC; Its crystalline form is regular, whiteness is high and pH stable, can satisfy the needs of medium-to-high grade cultural paper wadding.
For realizing the object of the invention, the technical scheme that is adopted is:
A kind of method for preparing spindle crystalline form alkali recovery white slime comprises digestion causticization process and white clay whiting, it is characterized in that: said spindle crystalline form alkali recovery white slime; Its preparation method may further comprise the steps: one), raw material forms two), digestion process, three), causticization process; Four), crystalline form control; Five), the separation and the washing of white clay, six), the processing of residual CaO in the white clay, concrete operations are following:
One), raw material is formed and device
Raw material is formed:
1., green liquor, be the clarification green liquor, green liquor total alkali 80 ~ 145g/l, in NaOH, green liquor akali sulphide 3 ~ 12g/l, in NaOH, 30% ~ 100% green liquor that wherein accounts for the green liquor total amount is used for assimilation of quicklime using, 0 ~ 70% remaining green liquor of another part is used for participating in causticizing reaction,
2., quick lime; CaO content>=60
%,
3., crystal control agent: the mixing of one or more in phosphoric acid, natrium citricum, sucrose and the citric acid,
4., CO
2: industrial liquid CO
2, or the flue gas after purifying;
Device:
The retort of agitator, thermometer and dropping funel is housed;
Two), digestion process
In the retort that agitator, thermometer and dropping funel are housed; Inject 30% ~ 100% clarification green liquor, avoid the use of the reduction that alkali that the clear water assimilation of quicklime using brought reclaims white liquid concentration, low whipping speed 50 ~ 600rpm; Reaction time 5min ~ 60min; Under 65 ℃ ~ 100 ℃ of the temperature, make milk of lime, subsequent use;
Three), causticization process
Milk of lime and the remaining a large amount of green liquors of 0 ~ 70% clarification green liquor are mixed in retort carry out causticizing reaction, mixing speed 300 ~ 1000rpm, 80 ℃ ~ 100 ℃ of causticization temperature, reaction time 90min ~ 200min makes alkali recovery white slime suspension;
Four), add crystal control agent
Add crystal control agent individually or simultaneously in digestion workshop section and caustic room respectively; Said crystal control agent is one or more the hybrid combining in phosphoric acid, natrium citricum, sucrose and the citric acid; Consumption is 0 ~ 5.0%, to the calcium carbonate quality of the theoretical preparation of used green liquor;
Five), the separation of white clay and washing
The product of causticization is realized white clay and the washing that separates and carry out white clay of liquid in vain through pre-hung filter or lime mud folter, and the white liquid reuse of gained is as the cooking liquor of slip house.White clay after the washing adds water and prepares alkali recovery white slime suspension;
Six), reduce the residual CaO of preparation alkali recovery white slime
In prepared alkali recovery white slime suspension, feed industrial liquid CO
2, or the flue gas after purifying, adjustment pH to 8.5 ~
9.5, cross 325 mesh sieves, promptly make alkali recovery white slime product with spindle crystalline structure.
Advantage and beneficial effect
Compared with prior art, method of the present invention has simple to operate, and is easy to implement, the advantage that cost is low.
Beneficial effect: 1, its particle shape is the spindle crystalline structure, and is little with the spindle aggregation difference of commodity PCC, thereby improved the performance of alkali recovery white slime.2, as papermaking filler, be applied in the cultural paper, retention is suitable with commodity PCC in the page, and water filtering performance is good, satisfies the performance requirement of high-grade culture with filler for paper.3, this technology will promote the quality and the application performance of alkali recovery white slime, promote the comprehensive utilization technique of alkali recovery white slime, help the sustainable development of paper industry, and realize the purpose of energy-saving and emission-reduction.
Description of drawings
Fig. 1 is the industrial flow sketch map of the inventive method;
Fig. 2 and Fig. 3 are respectively the electron microscope pictures of spindle crystalline structure particle of amorphous particle, the commodity PCC of conventional alkali recovery white slime;
Fig. 4 and Fig. 5 are the electron microscope pictures of the alkali recovery white slime of the prepared spindle crystalline structure of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is further described, but embodiment of the present invention is not limited thereto.
Embodiment 1
See also Fig. 1, a kind of method for preparing spindle crystalline form alkali recovery white slime is with 170g quick lime with in NaOH
300g clarifies green liquor, injects the retort that agitator, thermometer and dropping funel are housed lentamente and mixes, 70 ℃ of reaction temperatures; Reaction time is 30min, and under the mixing speed 300rpm condition, the digestion of carrying out quick lime makes milk of lime; Then with milk of lime with in the 700g of NaOH clarification green liquor, mix at leisure, in workshop section of digestion workshop section, do not attach crystal control agent separately; The hybrid combining of one or more of said crystal control agent phosphoric acid, natrium citricum, sucrose and citric acid, all available from Tianjin sky over the river chemical industry technology Co., Ltd, present embodiment selects for use 1.0g phosphoric acid and 4.2g natrium citricum as crystal control agent; 98 ℃ of control causticization temperature; Mixing speed 400rpm, reaction time 120min, washing realizes separating of white clay and white liquid to white clay with clear water through filtering; The white liquid that separates is delivered to slip house, and the white clay after the washing makes white clay suspension
,Then in white clay suspension, feed industrial liquid CO
2, or the flue gas after purifying
,Adjustment pH to 8.5 ~ 9.5,325 mesh sieves are crossed in present embodiment design 8.5, are like Fig. 4 and spindle crystalline form alkali recovery white slime product shown in Figure 5, store, and then deliver to paper machine room and make papermaking filler usefulness.
Embodiment 2
A kind of method for preparing spindle crystalline form alkali recovery white slime, its operating procedure is same as embodiment 1, and just crystal control agent is added in digestion and the caustic room simultaneously, quick lime 200g; Consumption in the clarification green liquor of NaOH is 200g and 850g, and the crystal control agent that present embodiment adds is selected natrium citricum for use, and consumption is 4.0g, and reaction temperature is controlled at 80 ℃; Reaction time is 50min, and under the mixing speed 200rpm condition, the digestion of carrying out quick lime makes milk of lime, then with milk of lime and 300g clarification green liquor; In NaOH, mix at leisure, add above-mentioned crystal control agent; Consumption 1.6g, 98 ℃ of control causticization temperature, mixing speed 400rpm; Reaction time 150min makes white clay suspension, then in white clay suspension, feeds industrial liquid CO
2, or the adjustment of the flue gas after purifying pH to 8.5, cross 325 mesh sieves, be like Fig. 4 and spindle crystalline form alkali recovery white slime product shown in Figure 5, store, then deliver to paper machine room and make papermaking filler usefulness.
Embodiment 3
A kind of method for preparing spindle crystalline form alkali recovery white slime, its operating procedure is same as embodiment 2, and crystal control agent is added in digestion and the caustic room simultaneously, and quick lime 200g is with NaOH
MeterThe consumption 550g of clarification green liquor, the crystal control agent that present embodiment adds is selected 1.0g phosphoric acid, 2.0g natrium citricum and 1.2g citric acid for use, and reaction temperature is controlled at 85 ℃; Reaction time is 50min, and under the mixing speed 400rpm condition, the digestion of carrying out quick lime makes milk of lime; Then with milk of lime and 600g clarification green liquor; In NaOH, mix at leisure, add the 1.6g natrium citricum
,98 ℃ of control causticization temperature, mixing speed 500rpm, reaction time 90min makes white clay suspension, then in white clay suspension, feeds industrial liquid CO
2, or the flue gas after purifying, adjustment pH to 8.5 crosses 325 mesh sieves, is like Fig. 4 and spindle crystalline form alkali recovery white slime product shown in Figure 5, stores, and then delivers to paper machine room and makes papermaking filler usefulness.
Embodiment 4
A kind of method for preparing spindle crystalline form alkali recovery white slime, its operating procedure is same as embodiment 1, and just crystal control agent is added on separately in the digestion workshop section; Quick lime 170g, the consumption of clarification green liquor is 500g, in NaOH; Reaction temperature is controlled at 85 ℃, and the reaction time is 20min, under the mixing speed 300rpm condition; The digestion of carrying out quick lime makes milk of lime, then with milk of lime with mix at leisure in the 500g of NaOH clarification green liquor, the crystal control agent that present embodiment adds is selected 0.5g phosphoric acid and 0.8 natrium citricum for use; 99 ℃ of control causticization temperature, mixing speed 400rpm, reaction time 120min; Make white clay suspension, then in white clay suspension, feed industrial liquid CO
2, or the flue gas after purifying, adjustment pH to 8.5 crosses 325 mesh sieves, is like Fig. 4 and spindle crystalline form alkali recovery white slime product shown in Figure 5, stores, and then delivers to paper machine room and makes papermaking filler usefulness.
Embodiment 5
A kind of method for preparing spindle crystalline form alkali recovery white slime, its operating procedure is same as embodiment 2, and just crystal control agent is added in digestion and the caustic room simultaneously; Quick lime 150g and in the consumption 650g of the clarification green liquor of NaOH, the crystal control agent that present embodiment adds is selected 0.5g phosphoric acid, 0.2 sucrose and 1.5g natrium citricum for use, and reaction temperature is controlled at 80 ℃; Reaction time is 50min, and under the mixing speed 200rpm condition, the digestion of carrying out quick lime makes milk of lime; Then with milk of lime with mix at leisure in the 300g of NaOH clarification green liquor; 98 ℃ of control causticization temperature, mixing speed 400rpm, reaction time 180min; Make white clay suspension, then in white clay suspension, feed industrial liquid CO
2, or the flue gas after purifying, adjustment pH to 8.5 crosses 325 mesh sieves, is like Fig. 4 and spindle crystalline form alkali recovery white slime product shown in Figure 5, stores, and then delivers to paper machine room and makes papermaking filler usefulness.
Embodiment 6
A kind of method for preparing spindle crystalline form alkali recovery white slime, its operating procedure is same as embodiment 2, and just crystal control agent is added in digestion and the caustic room simultaneously; Quick lime 200g, in the 650g clarification green liquor of NaOH, the crystal control agent of interpolation is selected 0.6g phosphoric acid and 0.9g natrium citricum for use; Reaction temperature is controlled at 65 ℃, is 40min during reaction, under the mixing speed 200rpm condition; The digestion of carrying out quick lime makes milk of lime, then milk of lime is mixed with 500g clarification green liquor at leisure, adds 0.4g phosphoric acid and 1.0g natrium citricum; 98 ℃ of control causticization temperature, mixing speed 470rpm, reaction time 120min; Make white clay suspension, then in white clay suspension, feed industrial liquid CO
2, or the flue gas after purifying, adjustment pH to 8.5 crosses 325 mesh sieves, is like Fig. 4 and spindle crystalline form alkali recovery white slime product shown in Figure 5, stores, and then delivers to paper machine room and makes papermaking filler usefulness.
Adopt the spindle crystalline form alkali recovery white slime of the inventive method preparation, its leading indicator is as shown in table 1.
Table 1
| Index name | Alkali recovery white slime |
| CaCO 3Content % | 91.3 |
| Solid content | 16.4%% |
| Crystalline form | Spindle |
| Whiteness %ISO | 91.2 |
| Average grain diameter μ m | 7.08 |
| The pH value | 8.6 |
| Screen over-size (325 order) % | 0.41 |
Find out that from table 1 calcium carbonate content of the spindle crystalline form alkali recovery white slime that the present invention is prepared is high, whiteness is than high; Size ratio is more moderate, the pH control stabilization, and 325 residue on sieves are lower; Microscopic pattern is the spindle crystalline form; The nothing that is different from traditional alkali recovery white slime as shown in Figure 2 is decided crystalline form, and similar with the spindle crystalline form of commodity precipitated calcium carbonate (PCC) as shown in Figure 3, can satisfy the carrier performance requirement of medium-to-high grade cultural paper.
The present invention is the method for preparing spindle crystalline form alkali recovery white slime under the non-wood pulping condition, is equally applicable to the preparation of the spindle crystalline form alkali recovery white slime under the pulping wood condition.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (2)
1. a method for preparing spindle crystalline form alkali recovery white slime comprises digestion causticization process and white clay whiting, it is characterized in that: said spindle crystalline form alkali recovery white slime; Its preparation method may further comprise the steps: one), raw material forms two), digestion process, three), causticization process; Four), crystalline form control; Five), the separation and the washing of white clay, six), the processing of residual CaO in the white clay, concrete operations are following:
One), raw material is formed and device
Raw material is formed:
1., green liquor, be the clarification green liquor, green liquor total alkali 80 ~ 145g/l, in NaOH, green liquor akali sulphide 3 ~ 12g/l, in NaOH, 30% ~ 100% green liquor that wherein accounts for the green liquor total amount is used for assimilation of quicklime using, 0 ~ 70% remaining green liquor of another part is used for participating in causticizing reaction;
2., quick lime; CaO content>=60
%,
3., crystal control agent: the hybrid combining of one or more in phosphoric acid, natrium citricum, sucrose and the citric acid;
4., liquid CO
2: industrial liquid CO
2;Or the flue gas after purifying;
Device:
The retort of agitator, thermometer and dropping funel is housed;
Two), digestion process
In the retort that agitator, thermometer and funnel are housed; Inject 30% ~ 100% clarification green liquor, avoid the use of the reduction that alkali that the clear water assimilation of quicklime using brought reclaims white liquid concentration, low whipping speed 50 ~ 600rpm; Reaction time 5min ~ 60min; Under 65 ℃ ~ 100 ℃ of the temperature, make milk of lime, subsequent use;
Three), causticization process
Milk of lime and the remaining a large amount of green liquors of 0 ~ 70% clarification green liquor are mixed in retort carry out causticizing reaction, mixing speed 300 ~ 1000rpm, 80 ℃ ~ 100 ℃ of causticization temperature, reaction time 90min ~ 200min makes alkali recovery white slime suspension;
Four), add crystal control agent
Add crystal control agent individually or simultaneously in digestion workshop section and caustic room respectively; Said crystal control agent is one or more the hybrid combining in phosphoric acid, natrium citricum, sucrose and the citric acid; Consumption is 0 ~ 5.0%, to the calcium carbonate quality of the theoretical preparation of used green liquor;
Five), the separation of white clay and washing
The product of causticization is realized white clay and the washing that separates and carry out white clay of liquid in vain through pre-hung filter or lime mud folter, and the white liquid reuse of gained is as the cooking liquor of slip house, and the white clay after the washing adds water and prepares alkali recovery white slime suspension;
Six), reduce the residual CaO of preparation alkali recovery white slime
In prepared alkali recovery white slime suspension, feed industrial liquid CO
2, or feed the flue gas after purifying, adjustment pH to 8.5 ~
9.5, cross 325 mesh sieves, promptly make alkali recovery white slime product with spindle crystalline structure.
2. the method for preparing spindle crystalline form alkali recovery white slime according to claim 1; It is characterized in that: described method is the method for preparing spindle crystalline form alkali recovery white slime under the non-wood pulping condition, is equally applicable to the preparation of the spindle crystalline form alkali recovery white slime under the pulping wood condition.
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976387A (en) * | 2012-12-07 | 2013-03-20 | 陕西科技大学 | Improved preparation technology of white mud calcium carbonate for papermaking filler |
| CN103693668A (en) * | 2013-11-28 | 2014-04-02 | 广西华纳新材料科技有限公司 | Granular fine calcium carbonate and preparation method thereof |
| CN103754918A (en) * | 2013-12-25 | 2014-04-30 | 闫冉冉 | Method for preparing alkali-recovery lime mud free of components with fine particle sizes |
| CN104803405A (en) * | 2014-01-28 | 2015-07-29 | 李广 | White mud calcium carbonate treatment technology |
| CN104843758A (en) * | 2015-04-27 | 2015-08-19 | 李广 | Dealkalization and purification method used in production of precipitated calcium carbonate |
| CN108330729A (en) * | 2018-02-11 | 2018-07-27 | 山东太阳纸业股份有限公司 | A kind of white clay filler and its application in culture paper |
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|---|---|---|---|---|
| CN1239166A (en) * | 1998-06-14 | 1999-12-22 | 艾天召 | Process for causticizing green solution of alkali recovered from black liquid of paper-making |
| JP2007138336A (en) * | 2005-11-18 | 2007-06-07 | Daiyanitorikkusu Kk | Method for treating green solution |
| CN101700901A (en) * | 2009-11-25 | 2010-05-05 | 王冬生 | Novel method for producing light calcium carbonate (CaCO3) from white clay generated from alkali recovering in paper-making industry |
-
2012
- 2012-02-24 CN CN201210044136.3A patent/CN102561086B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239166A (en) * | 1998-06-14 | 1999-12-22 | 艾天召 | Process for causticizing green solution of alkali recovered from black liquid of paper-making |
| JP2007138336A (en) * | 2005-11-18 | 2007-06-07 | Daiyanitorikkusu Kk | Method for treating green solution |
| CN101700901A (en) * | 2009-11-25 | 2010-05-05 | 王冬生 | Novel method for producing light calcium carbonate (CaCO3) from white clay generated from alkali recovering in paper-making industry |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976387A (en) * | 2012-12-07 | 2013-03-20 | 陕西科技大学 | Improved preparation technology of white mud calcium carbonate for papermaking filler |
| CN102976387B (en) * | 2012-12-07 | 2014-09-03 | 陕西科技大学 | Improved preparation technology of white mud calcium carbonate for papermaking filler |
| CN103693668A (en) * | 2013-11-28 | 2014-04-02 | 广西华纳新材料科技有限公司 | Granular fine calcium carbonate and preparation method thereof |
| CN103693668B (en) * | 2013-11-28 | 2015-09-16 | 广西华纳新材料科技有限公司 | A kind of Granular fine calcium carbonate and preparation method thereof |
| CN103754918A (en) * | 2013-12-25 | 2014-04-30 | 闫冉冉 | Method for preparing alkali-recovery lime mud free of components with fine particle sizes |
| CN104803405A (en) * | 2014-01-28 | 2015-07-29 | 李广 | White mud calcium carbonate treatment technology |
| CN104843758A (en) * | 2015-04-27 | 2015-08-19 | 李广 | Dealkalization and purification method used in production of precipitated calcium carbonate |
| CN108330729A (en) * | 2018-02-11 | 2018-07-27 | 山东太阳纸业股份有限公司 | A kind of white clay filler and its application in culture paper |
| CN108330729B (en) * | 2018-02-11 | 2021-04-20 | 山东太阳纸业股份有限公司 | White clay filler and application thereof in cultural paper machine |
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|---|---|
| CN102561086B (en) | 2015-02-11 |
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