CN108978310A - The processing method and application thereof of white clay high-recovery in a kind of paper-making process - Google Patents
The processing method and application thereof of white clay high-recovery in a kind of paper-making process Download PDFInfo
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- CN108978310A CN108978310A CN201810970897.9A CN201810970897A CN108978310A CN 108978310 A CN108978310 A CN 108978310A CN 201810970897 A CN201810970897 A CN 201810970897A CN 108978310 A CN108978310 A CN 108978310A
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- China
- Prior art keywords
- white clay
- white
- recovery
- paper
- lime
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
Abstract
The present invention provides a kind of processing method and application thereof of white clay high-recovery in paper-making process, is related to pulp technology for making paper.The processing method of white clay high-recovery in paper-making process, comprising: obtain the first white clay after carrying out alkali collection to black liquor of pulp making, secondary causticization, washing and removal of impurities are successively carried out to the filtrate for filtering out the first white clay and the first white clay and obtain the second white clay.The second obtained white clay is preparing the application in cement.To the rate of recovery with higher of white clay obtained in paper-making process, reduces the pollution of waste and recycled in the preparation of cement.
Description
Technical field
The present invention relates to pulp technology for making paper, and in particular to a kind of paper-making process white clay high-recovery processing method
And application thereof.
Background technique
In enterprises in pulp and paper industry alkali collection, in addition to Some Enterprises are recycled alkali recovery white slime, most enterprises are all
It is to be filled or stacked with selecting.A large amount of limestone resource is not only wasted, the impurity in white clay is penetrated into rain drop erosion
Underground, soil and groundwater resources to surrounding cause serious secondary pollution.As attention rate of the public to environmental quality is got over
Carry out higher, the anxiety of land resource, landfill disposal is also increasingly difficult.Meanwhile the white clay of outdoor stockpiling also will form dust pollution,
Air quality is impacted.
In view of this, proposing the present invention.
Summary of the invention
The purpose of the present invention is to provide a kind of processing method and application thereof of white clay high-recovery in paper-making process, to making
The rate of recovery with higher of white clay obtained in paper process reduces the pollution of waste and carries out circulation benefit in the preparation of cement
With.
The present invention solves its technical problem and adopts the following technical solutions to realize.
The present invention proposes a kind of processing method of white clay high-recovery in paper-making process, comprising: carries out alkali to black liquor of pulp making
The first white clay is obtained after recycling, and secondary causticization, washing and removal of impurities are successively carried out to the filtrate for filtering out the first white clay and the first white clay
Obtain the second white clay.
Further, in a preferred embodiment of the present invention, secondary causticization includes: to weigh according to the 15~25% of filtrate quality
Milk of lime is made in quick lime, by filtrate and milk of lime according to the stirring speed that volume ratio is after 1:1~5 is mixed in 400~5000rpm
Pre-product is obtained after reacting 90~120min at a temperature of degree and 80~100 DEG C, then is added into pre-product after the first white clay
60~90min is reacted at a temperature of the mixing speed of 1500~5000rpm and 80~100 DEG C.
Further, in a preferred embodiment of the present invention, separate the first white clay white liquor and white liquor after the second white clay with
Quick lime is in the mixing speed of 50~500rpm, 50 DEG C~100 DEG C of the at a temperature of obtained milk of lime of 5~60min of reaction.
Further, in a preferred embodiment of the present invention, washing includes: to be rinsed the white clay after secondary causticization using clear water
Afterwards, it reuses after acid solution is rinsed.
Further, in a preferred embodiment of the present invention, acid solution is 10wt% sulfuric acid below selected from concentration or concentration is
10wt% or less hydrochloric acid solution.
Further, in a preferred embodiment of the present invention, wash acid-leached product again using pre- hanging filter
With filtering until alkali content reaches 0.5wt% or less.
Further, in a preferred embodiment of the present invention, the rate of recovery of white clay is 92%~95% after secondary alkali collection.
The present invention proposes a kind of white clay that the processing method according to white clay high-recovery in above-mentioned paper-making process obtains, and is making
Application in standby cement.
The beneficial effect of the embodiment of the present invention is:
Lime mud treatment method in the paper-making process of the embodiment of the present invention, by obtaining the first white clay and its filtrate to alkali collection
Secondary causticization is carried out, its rate of recovery is further increased, synthesis improves the rate of recovery of white clay integrally the secondary causticization of filtrate.
Also, obtained white clay is used for the preparation of cement.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Processing method of white clay high-recovery in the paper-making process of the embodiment of the present invention and application thereof is carried out below specific
Explanation.
The processing method of white clay high-recovery in a kind of paper-making process, comprising:
The first white clay is obtained after carrying out alkali collection to black liquor of pulp making, successively to the filtrate for filtering out the first white clay and the first white clay
It carries out secondary causticization, washing and removal of impurities and obtains the second white clay.Wherein, the second white clay is exactly the product obtained after pre-processing.
Specifically, secondary causticization the following steps are included:
(1) milk of lime is prepared: the white liquor and white liquor and filtrate quality after second white clay of separation first white clay
15~25% quick lime quick lime, the mixing speed of 50~500rpm, 50 DEG C~100 DEG C at a temperature of reaction 5~
Milk of lime is made in 60min.By the use to the white liquor separated twice, recycling for waste liquid is furthermore achieved.
(2) the secondary causticization of filtrate: by filtrate and the milk of lime according to volume ratio be after 1:1~5 is mixed 400~
Pre-product is obtained after reacting 90~120min at a temperature of the mixing speed of 5000rpm and 80~100 DEG C.
The secondary causticization of (3) first white clays: the stirring after the first white clay in 1500~5000rpm is added into pre-product again
60~90min is reacted at a temperature of speed and 80~100 DEG C.By the secondary causticization to the first white clay, its time is further increased
Yield, synthesis improve the rate of recovery of white clay integrally the secondary causticization of filtrate.
Specifically, washing the following steps are included:
It will be reused after acid solution is rinsed after product after secondary causticization rinses using clear water.Wherein, acid solution is selected from dense
Degree is 10wt% sulfuric acid below or concentration is 10wt% or less hydrochloric acid solution.
The product after pickling is further washed to achieve the effect that removal of impurities later.Specifically, using pre- hanging filter
Acid-leached product is washed and filtered again until alkali content reaches 0.5wt% hereinafter, obtaining the second white clay.
Hold it is above-mentioned, after secondary alkali collection the rate of recovery of white clay be 92%~95%.It is a kind of according to white in above-mentioned paper-making process
The white clay that the processing method of mud high-recovery obtains, i.e. the second white clay are preparing the application in cement.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Prepare milk of lime: 18% quick lime of white liquor and filtrate quality after separation first white clay and the second white clay
Mixing, in the mixing speed of 300rpm, 86 DEG C of the at a temperature of obtained milk of lime of reaction 45min.
The secondary causticization of filtrate: stirring in 1000rpm after filtrate and the milk of lime are mixed according to volume ratio for 1:2.5
It mixes and obtains pre-product after reacting 120min at a temperature of speed and 86 DEG C.
The secondary causticization of first white clay: it is added again into pre-product after the first white clay in the mixing speed of 3000rpm and 90
60min is reacted at a temperature of DEG C.
Later, washing is carried out to the product of secondary causticization and removal of impurities obtains the second white clay, wherein pickling is to use 8wt%
Sulfuric acid.
Through detecting, the rate of recovery of white clay is 93.7%.
Embodiment 2
Prepare milk of lime: 23% life of white liquor and filtrate quality after separating first white clay and second white clay
Lime quick lime, in the mixing speed of 210rpm, 70 DEG C of the at a temperature of obtained milk of lime of reaction 50min.
The secondary causticization of filtrate: by filtrate and the milk of lime according to the stirring that volume ratio is after 1:3 is mixed in 1800rpm
Pre-product is obtained after reacting 110min at a temperature of speed and 95 DEG C.
The secondary causticization of first white clay: it is added again into pre-product after the first white clay in the mixing speed of 4000rpm and 85
70min is reacted at a temperature of DEG C.
Later, washing is carried out to the product of secondary causticization and removal of impurities obtains the second white clay, wherein pickling is to use 9wt%
Hydrochloric acid.
Through detecting, the rate of recovery of white clay is 94.1%.
Embodiment 3
Prepare milk of lime: 25% life of white liquor and filtrate quality after separating first white clay and second white clay
Lime quick lime, in the mixing speed of 100rpm, 80 DEG C of the at a temperature of obtained milk of lime of reaction 30min.
The secondary causticization of filtrate: by filtrate and the milk of lime according to the stirring that volume ratio is after 1:3 is mixed in 4000rpm
Pre-product is obtained after reacting 100min at a temperature of speed and 75 DEG C.
The secondary causticization of first white clay: it is added again into pre-product after the first white clay in the mixing speed of 2000rpm and 90
80min is reacted at a temperature of DEG C.
Later, washing is carried out to the product of secondary causticization and removal of impurities obtains the second white clay, wherein pickling is to use 9wt%
Hydrochloric acid.
Through detecting, the rate of recovery of white clay is 93.2%.
The white clay that above-described embodiment 1~3 obtains is held, the application in cement is being prepared.
In conclusion lime mud treatment method in the paper-making process of the embodiment of the present invention, white by obtaining first to alkali collection
Mud and its filtrate carry out secondary causticization, further increase its rate of recovery, the comprehensive recycling for making white clay to the secondary causticization of filtrate
Rate integrally improves.Also, obtained white clay is used for the preparation of cement.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (8)
1. the processing method of white clay high-recovery in a kind of paper-making process characterized by comprising
The first white clay is obtained after carrying out alkali collection to black liquor of pulp making, successively to the filtrate and the first white clay for filtering out first white clay
It carries out secondary causticization, washing and removal of impurities and obtains the second white clay.
2. the method according to claim 1, wherein the secondary causticization includes: according to the filtrate quality
15~25%, which weigh quick lime, is made milk of lime, by the filtrate and the milk of lime according to volume ratio be after 1:1~5 is mixed
Pre-product is obtained after reacting 90~120min at a temperature of the mixing speed of 400~5000rpm and 80~100 DEG C, then is produced to pre-
Be added in object after first white clay the mixing speed of 1500~5000rpm and 80~100 DEG C at a temperature of reaction 60~
90min。
3. according to the method described in claim 2, it is characterized in that, white liquor and second white clay of separation first white clay
White liquor afterwards and the quick lime the mixing speed of 50~500rpm, 50 DEG C~100 DEG C at a temperature of react 5~60min system
Obtain the milk of lime.
4. the method according to claim 1, wherein the washing includes: will be after secondary causticization using clear water
After product rinses, reuse after acid solution is rinsed.
5. according to the method described in claim 4, it is characterized in that, the acid solution be selected from concentration be 10wt% sulfuric acid below or
Concentration is 10wt% or less hydrochloric acid solution.
6. according to the method described in claim 4, it is characterized in that, wash acid-leached product again using pre- hanging filter
It washs and filters until alkali content reaches 0.5wt% or less.
7. the method according to claim 1, wherein after secondary alkali collection the white clay the rate of recovery be 92%~
95%.
8. the processing method of white clay high-recovery obtains white in a kind of any one according to claim 1~7 paper-making process
Mud is preparing the application in cement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970897.9A CN108978310A (en) | 2018-08-24 | 2018-08-24 | The processing method and application thereof of white clay high-recovery in a kind of paper-making process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970897.9A CN108978310A (en) | 2018-08-24 | 2018-08-24 | The processing method and application thereof of white clay high-recovery in a kind of paper-making process |
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| CN108978310A true CN108978310A (en) | 2018-12-11 |
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| CN201810970897.9A Pending CN108978310A (en) | 2018-08-24 | 2018-08-24 | The processing method and application thereof of white clay high-recovery in a kind of paper-making process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635670A (en) * | 1969-06-11 | 1972-01-18 | Allied Chem | Recovery of dilute caustic soda solutions from spent liquors containing hemicellulose |
| 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 |
| CN1641100A (en) * | 2004-07-20 | 2005-07-20 | 上海东升新材料有限公司 | Method for recovering superfine calcium carbonate by clean causticization of green liquor |
| JP2006274500A (en) * | 2005-03-30 | 2006-10-12 | Nippon Paper Industries Co Ltd | Method for operating causticizing process |
| 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 |
| CN103224336A (en) * | 2013-05-10 | 2013-07-31 | 西南科技大学 | Modified treatment method of discarded papermaking white mud and technology for preparing cement admixture through single-step process |
-
2018
- 2018-08-24 CN CN201810970897.9A patent/CN108978310A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635670A (en) * | 1969-06-11 | 1972-01-18 | Allied Chem | Recovery of dilute caustic soda solutions from spent liquors containing hemicellulose |
| 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 |
| CN1641100A (en) * | 2004-07-20 | 2005-07-20 | 上海东升新材料有限公司 | Method for recovering superfine calcium carbonate by clean causticization of green liquor |
| JP2006274500A (en) * | 2005-03-30 | 2006-10-12 | Nippon Paper Industries Co Ltd | Method for operating causticizing process |
| 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 |
| CN103224336A (en) * | 2013-05-10 | 2013-07-31 | 西南科技大学 | Modified treatment method of discarded papermaking white mud and technology for preparing cement admixture through single-step process |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.2, group 9, Yongping village, Xiaogu Town, Qianwei County, Leshan City, Sichuan Province Applicant after: Sichuan Fengsheng Paper Technology Co., Ltd Address before: 614405 Nine Groups of Yongping Village, Xiaogu Town, Qianwei County, Leshan City, Sichuan Province Applicant before: SICHUAN QIANWEI FENGSHENG PAPER LLC |
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Application publication date: 20181211 |