CN100355980C - Tech. for producing retention and drainage aid microgranule - Google Patents
Tech. for producing retention and drainage aid microgranule Download PDFInfo
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- CN100355980C CN100355980C CNB2005100615134A CN200510061513A CN100355980C CN 100355980 C CN100355980 C CN 100355980C CN B2005100615134 A CNB2005100615134 A CN B2005100615134A CN 200510061513 A CN200510061513 A CN 200510061513A CN 100355980 C CN100355980 C CN 100355980C
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Abstract
The present invention relates to a production technology for retention and filtration aid particulate products, which uses bentonite as a raw material. The technical process of the present invention comprises the following steps of treating bentonite by cutting and ball milling; separating in rotational flow after washing stripping; adding sodium salt in a certain proportion to a rotational flow device; dissolving cristobalite into soluble silicon salt; supporting in a column mode by silicon substance or aluminum salt; drying in stages under the adjustment and the control of a program temperature controller. The sodium salt and part of unseparated cristobalite are added in the rotational flow technology of the present invention to produce a soluble silicon acid substance, and the purposes of using and completely eliminating the cristobalite are obtained. Silicon and aluminum which have retention aid action are used as a column-forming agent in paper making production, and impurity elements can not be led into the products; a program temperature control desiccation technology is adopted in a desiccation process, and the quality of products is ensured. The final products of the present invention meet the requirement of retention and filtration aid of a small grain diameter and a high specific surface area of paper making, the output value of bentonite ore is greatly increased, and the bentonite resource can be utilized best.
Description
Technical field
The invention belongs to chemical field, relate to the production technology of paper technology auxiliary material, be specially with the bentonite production technology of a kind of retention particulate that is main component.
Background technology
In phase early 1980s, particulate retention technology has obtained development and utilization in papermaking, be applied to behind the paper making wet part can improve the water filtering performance of keeping and increase page of tiny component by the synergy between particulate and the polymer, the shaping of page simultaneously also is improved.Compare with traditional monobasic or binary polymer retention system, particulate retention system has remarkable advantages, these particulates help to form the wadding polymers littler, tightr, that intensity is bigger, and are adsorbed on the furnish component consumingly, and then obtain better to keep the shaping with page.And in the presence of the high interference material, still can demonstrate retention and drainage effect preferably.
In addition, particulate retention system has the poly-ability of wadding again in wet end and plain boiled water, and can resist the high shear force under the high turbulent flow.This wadding again gathers the efficient that effect will improve paper machine clean water system, also gives wet web higher porosity, makes it to be easier to squeezing and dry.According to the kind of used particulate, current particulate retention system can be divided into cataloid class, poly-aluminium class and little polymer class, its compound mode such as following table:
| System | Add earlier | The back adds |
| Cataloid | Cationic starch or cationic polyacrylamide | Cataloid |
| Little polymer | Cationic polyacrylamide | The little polymer of anion |
| Poly-aluminium | Cationic starch | Colloidal aluminium hydroxide |
| The bentonite particulate | Cationic polyacrylamide | The bentonite particulate |
The bentonite particulate is applied to the retention aid and filtering aid system only a small amount of report, and domestic do not have enterprise to produce like product as yet, and prior art can not be produced and is fit to the bentonite particulate that paper requires.Abroad, there has been the bentonite particulate product to apply to paper industry, because its good performance is widely accepted, annual consumption is more than tens thousand of tons, though the domestic existing producer's large-scale production of still not having, but laboratory demonstration and external product have proved the application potential of bentonite particulate well, and domestic paper enterprise is not strange to this product.Because its good market prospects are badly in need of developing the bentonite particulate production technology that meets the domestic production condition,
It is the production technology of main component retention particulate with the bentonite that the present invention just provides a kind of.
Summary of the invention
The production technology of retention aid and filtering aid particulate of the present invention comprises the steps:
(1) with the bentonite is raw material, behind chopping, ball milling, adds 20 times of water gagings, enter cyclone after washing is delaminated by raw material weight;
(2) add sodium salt by bentonite material weight in cyclone, described sodium salt can be 0.2～1% calgon or sodium pyrophosphate;
(3) remove isolated sediment in the cyclone, in the solubility slurry of collecting,, fully stir after 1～2 hour and enter pillared reactor by sodium carbonate or the sodium bicarbonate or the sodium fluoride of bentonite material weight adding 2～10%;
(4) in the solubility slurry of pillared reactor, add 2～5% Ludox or sodium metasilicate by bentonite material weight, fully stir under 50～70 ℃ of conditions and enter evaporation boiler after 2～3 hours and concentrate;
(5) material that adds in the above-mentioned steps (4) also can change and be aluminium chloride or aluminium hydroxide by bentonite material weight 2～5%, and it is concentrated that abundant stirring enters evaporation boiler under 50～70 ℃ of conditions after 2～3 hours;
(6) material after concentrating enters drier, classification drying under the control and regulation of programmed temperature control instrument;
(7) Gan Zao material ball milling is the powdery particles product.
By above step gained powdery particles product is product of the present invention.
Be applied to paper technology by above step gained powdery particles product as retention and drainage aid agent.
The specific embodiment
Example 1:
One ton of bentonite ore raw material adds 20 tons of water (bentonite content is 5%) behind chopping, ball milling, fully washing is delaminated, enter cyclone, isolate sandstone impurity, in slurry, add 2～10 kilograms of calgons, fully the DL reaction is 2～3 hours, eliminates cristobalite in slurry fully.Deposits such as sandstone reclaim as construction material.Solubility slurry in the cyclone adds 20～100 kilograms of sodium carbonate, or sodium bicarbonate, fully stirs and carries out the sodium processing in 1～2 hour; After concentrating, slurry enters pillared reactor, adds pillared reactor with 20～50 kilograms of Ludox or sodium metasilicate, and 50～70 ℃ of reaction temperatures, fully stir, disperse at 2～3 hours time.Slurry after pillared advances 70～100 ℃ of evaporation and concentration of evaporation boiler, be the bonding shape to outward appearance, material enters drier, under the regulation and control of programmed temperature control instrument, in the reduction of the water content ratio regulating and controlling temperature that descends step by step, finally finish dry materials about 60 ℃, dried material particles is 420～850 kilograms of Powdered retention aid and filtering aid particulate products through ball milling.
Example 2:
One ton of bentonite ore raw material, behind chopping, ball milling, add 20 tons of water (bentonite content is 5%), fully washing is delaminated, enter cyclone, isolate sandstone impurity, add 2～10 kilograms of sodium pyrophosphates in slurry, fully DL was reacted 2～3 hours then, eliminated cristobalite in slurry fully.Deposits such as sandstone reclaim as construction material.Solubility slurry in the cyclone adds 20～100 kilograms of sodium fluorides, fully stir 1～2 hour to its sodium processing, after concentrating, slurry enters pillared reactor, add pillared reactor with 20～50 kilograms of Ludox or sodium metasilicate, 50～70 ℃ of reaction temperatures, fully stir, disperse at 2～3 hours time.Slurry after pillared advances 70～100 ℃ of evaporation and concentration of evaporation boiler, be the bonding shape to outward appearance, material enters drier, under the regulation and control of programmed temperature control instrument, in the reduction of the water content ratio regulating and controlling temperature that descends step by step, finally finish dry materials about 60 ℃, dried material particles is 420～850 kilograms of Powdered retention aid and filtering aid particulate products through ball milling.
Example 3:
One ton of bentonite ore raw material, behind chopping, ball milling, add 20 tons of water (bentonite content is 5%), fully washing is delaminated, enter cyclone, isolate sandstone impurity, add 2～10 kilograms of sodium pyrophosphates or calgon, fully the DL reaction is 2～3 hours, eliminates cristobalite in slurry fully.Deposits such as sandstone reclaim as construction material.Solubility slurry in the cyclone adds 20～100 kilograms of sodium carbonate or sodium bicarbonate or sodium fluoride, fully stirs 1～2 hour to its sodium modification, and after concentrating, slurry enters pillared reactor again.Add pillared reactor with 20～50 kilograms of aluminium chloride or aluminium hydroxide, 50～60 ℃ of reaction temperatures, fully stir, disperse at 2～3 hours time.Slurry after pillared advances 70～100 ℃ of evaporation and concentration of evaporation boiler, be the bonding shape to outward appearance, material enters drier, under the regulation and control of programmed temperature control instrument, in the reduction of the water content ratio regulating and controlling temperature that descends step by step, finally finish dry materials about 60 ℃, dried material particles is 420～850 kilograms of Powdered retention aid and filtering aid particulate products through ball milling.
Performance indications such as following table by the bentonite retention aid and filtering aid particulate product behind the process implementing of the present invention:
Table 1: the technical indicator of bentonite retention aid and filtering aid particulate
| Project | Index |
| Outward appearance | White powder |
| Fineness (Φ 44um sieve), % | ≥98 |
| Moisture, % | ≤12 |
| Expansion capacity, mL/g | ≥40 |
| Ion-exchange, the mmol/100g sample | ≥80 |
| 0.044mm the wet screening screen over-size, % | ≤0.1 |
Expansion capacity, 0.044mm wet screening screen over-size have embodied the purity of retention aid and filtering aid particulate product in the above table, and 0.044mm wet screening screen over-size is more little, illustrate that then purity is good more, and the content of sandstone is little in the product; The ion-exchange data embodied indirectly delaminate, effect that modification is handled in purification, sodium.
The present invention adds certain density alkaline chemical in the bentonite material, and the christobalite that separate at the part end in the soil reacts with it, generates the silicic acid material of solubility, thereby reaches the purpose of removing sandstone when utilizing christobalite fully.
The present invention program can realize serialization production, and has guaranteed the purity and the uniformity of product.In addition, the material moisture that rotational flow separation is come out can be reduced to below 70%, has saved the energy widely, also lays a good foundation for follow-up pillared exchange interlayer ion technology.
With silicon or aluminium is pillaring agent, can not introduce impurity element in bentonite like this, and silicon and aluminium original just can helping in paper gives over to usefulness.Utilize bentonite to be easy to absorption intercalation effect during the half-dried attitude of the bentonite after purification to silicon and aluminium, add silicon and aluminum material, impel bentonite lamella partly to peel off with the technology of delaminating again, thereby obtain the modified alta-mud of granule, bigger serface, can improve the retention aid and filtering aid performance.Common drying technology is to keep same temperature to finish-drying.Because of bentonite has high slumpability, in drying, easily bond, form the macroparticle that is difficult for dispersion.The dry technology of the supporting service routine temperature control of the present invention has guaranteed the quality of product.Adopt the temperature programmed control mode, when bentonite filter cake water content is big, the higher temperature of control drying room, along with reducing of moisture content, temperature was about 60 ℃ when temperature was reduced to drying gradually.Guarantee that final products have the bentonite product small particle diameter that is suitable for paper grade (stock) and the requirement of high-specific surface area.The quality and the result of use of product have been guaranteed.
The present invention is promoted to the expensive goods of 5000-10000 unit/ton with bentonite from the low grade products of hundreds of unit, has greatly promoted the added value of bentonite ore.Make the utilization that this natural resources of bentonite can be best.
Claims (2)
1, a kind of production technology of retention aid and filtering aid particulate is characterized in that following steps:
(1) with the bentonite is raw material, behind chopping, ball milling, adds 20 times of water gagings, enter cyclone after washing is delaminated by raw material weight;
(2) add sodium salt by bentonite material weight in cyclone, described sodium salt is 0.2～1% calgon or sodium pyrophosphate;
(3) remove isolated sediment in the cyclone, in the solubility slurry of collecting,, fully stir after 1～2 hour and enter pillared reactor by sodium carbonate or the sodium bicarbonate or the sodium fluoride of bentonite material weight adding 2～10%;
(4) in the solubility slurry of pillared reactor, add 2～5% Ludox or sodium metasilicate by bentonite material weight, fully stir under 50～70 ℃ of conditions and enter evaporation boiler after 2～3 hours and concentrate;
(5) material after concentrating enters drier, classification drying under the control and regulation of programmed temperature control instrument;
(6) Gan Zao material ball milling is the powdery particles product.
2, press the production technology of the described a kind of retention aid and filtering aid particulate of claim 1, it is characterized in that: the material of the middle adding of above-mentioned steps (4) changes and is aluminium chloride or aluminium hydroxide by bentonite material weight 2～5%, and it is concentrated that abundant stirring enters evaporation boiler under 50～70 ℃ of conditions after 2～3 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100615134A CN100355980C (en) | 2005-11-11 | 2005-11-11 | Tech. for producing retention and drainage aid microgranule |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100615134A CN100355980C (en) | 2005-11-11 | 2005-11-11 | Tech. for producing retention and drainage aid microgranule |
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| CN1793503A CN1793503A (en) | 2006-06-28 |
| CN100355980C true CN100355980C (en) | 2007-12-19 |
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| CNB2005100615134A Active CN100355980C (en) | 2005-11-11 | 2005-11-11 | Tech. for producing retention and drainage aid microgranule |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100500563C (en) * | 2007-03-29 | 2009-06-17 | 浙江三鼎科技有限公司 | Method for purifying superfine montmorillonite |
| CN103877960B (en) * | 2014-04-03 | 2015-10-21 | 常州大学 | A kind of preparation method of bentonite base catalyst carrier |
| CN103981752B (en) * | 2014-04-29 | 2016-08-24 | 华南理工大学 | A kind of cation-modified preparation method determining agent of the DCS of being applied to |
| CN110528309A (en) * | 2019-08-22 | 2019-12-03 | 浙江荣晟环保纸业股份有限公司 | The paper technology of novel retention aid and filtering aid |
| CN112575612B (en) * | 2020-12-09 | 2021-11-26 | 杭州玖圩新材料科技有限公司 | Composite retention aid and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3865240A (en) * | 1970-07-21 | 1975-02-11 | Paul Schick | Purification of bentonite |
| CN1011879B (en) * | 1988-01-05 | 1991-03-06 | 周运臣 | Prepn. of sodium-base bentonite from calcium-base bentonite |
| CN1061946C (en) * | 1997-03-31 | 2001-02-14 | 孙忠 | Process for producing sodium-base bentonite from calcium-base bentonite |
| CN1155515C (en) * | 2002-04-16 | 2004-06-30 | 张兴华 | Process for preparing granular pentonite |
-
2005
- 2005-11-11 CN CNB2005100615134A patent/CN100355980C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3865240A (en) * | 1970-07-21 | 1975-02-11 | Paul Schick | Purification of bentonite |
| CN1011879B (en) * | 1988-01-05 | 1991-03-06 | 周运臣 | Prepn. of sodium-base bentonite from calcium-base bentonite |
| CN1061946C (en) * | 1997-03-31 | 2001-02-14 | 孙忠 | Process for producing sodium-base bentonite from calcium-base bentonite |
| CN1155515C (en) * | 2002-04-16 | 2004-06-30 | 张兴华 | Process for preparing granular pentonite |
Non-Patent Citations (3)
| Title |
|---|
| 膨润土的特点及其在造纸工业中的应用 赵丽红，刘温霞.中国造纸，第23卷第10期 2004 * |
| 膨润土高层次开发利用研究新进展 张术根，谢志勇，申少华，巩来元.中国非金属矿工业导刊，第1期 2002 * |
| 钙基膨润土湿法提纯工艺的研究 杨能谓，洪朝锽，伏专红，傅新发，王儒芬.浙江化工，第21卷第3期 1990 * |
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| CN1793503A (en) | 2006-06-28 |
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Owner name: ZHEJIANG CHANGAN RENHENG SCIENCE AND TECHNOLOGY CO Free format text: FORMER OWNER: CHANGXING RENHENG REFINED BENTONITE CO., LTD. Effective date: 20091225 |
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Effective date of registration: 20091225 Address after: Old duck pond of Si an town, Changxing County, Zhejiang Patentee after: Chang'an Renheng Chemical Co., Ltd. Address before: Old duck pond, Si Zhen, Changxing County, Zhejiang, Huzhou Patentee before: Changxing Renheng Fine Bentonite Co., Ltd. |