CN101186326A - Method for preparing calcium carbonate from reclaimed white mud of straw pulp production alkali - Google Patents
Method for preparing calcium carbonate from reclaimed white mud of straw pulp production alkali Download PDFInfo
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- CN101186326A CN101186326A CNA2007101151314A CN200710115131A CN101186326A CN 101186326 A CN101186326 A CN 101186326A CN A2007101151314 A CNA2007101151314 A CN A2007101151314A CN 200710115131 A CN200710115131 A CN 200710115131A CN 101186326 A CN101186326 A CN 101186326A
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- sieve
- white clay
- calcium carbonate
- straw pulp
- white mud
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Abstract
The invention relates to a solid waste recycling method utilizing white mud recovered from pulping alkali of grass pulp to prepare calcium carbonate. The invention provides a method using the white mud recovered from the pulping alkali of grass pulp to prepare the calcium carbonate, aiming at overcoming the limitation of the prior art and realizing the recycling of solid waste and reaching the economic and environment protection goals. The technical scheme is carried out with the following processes combination according to the following steps: (1) defecation of original filtrate; (2) precipitation by adding flocculant; (3) washing the white mud; (4) primary carbonization; (5) sieving; (6) secondary carbonization; (7) deflocculating; (8) sieving. The indexes of the prepared products after the technical process are 9.5-10 PH value, 99 percent throughput volume of 325 meshes sieve, and over 88 percent of white degree.
Description
Technical field
The present invention relates to the method that a kind of white clay that utilizes straw pulp alkali to reclaim of solid waste recycle prepares lime carbonate.
Background technology
Present straw pulp alkali recovery white slime, because of the silicate content height, landfill not only damages environment generally speaking, and also is a kind of waste to raw material.
Summary of the invention
The present invention is exactly the defective that exists at prior art, provides a kind of white clay that utilizes straw pulp alkali to reclaim to prepare the method for lime carbonate, realizes the solid waste recycle, reaches the purpose of economic environmental protection.
Its technical scheme is to be that the following step carries out with following process combination: (1) former green liquor clarification, (2) add the flocculation agent precipitation, and (3) white clay washs, (4) carbonizations, and sieve (5), (6) secondary carbonization, (7) separate wadding, and sieve (8).
Wherein: the flocculation agent in the step (2) is a lime; White clay washing in the step (3) is twice pre-hanging vacuum filter washing, one section pressure filter washing; Carbonization in step (4) and (6) is to feed technical grade CO
2, control pH value 9.0-9.5; In the step (5) sieve for once sieving the 80-100 order, the secondary sieve is the 300-320 order; It is by cracking flossing machine that separating in the step (7) wadded a quilt with cotton, and utilizes zirconium oxide bead to be grinding medium, grinds, and finally reaches the particle size range of 16-19 micron.
The present invention reaches ph value 9.5-10 through the product index that makes after the above-mentioned technical process, 325 mesh sieve throughputs 99%, and whiteness is more than 88%.
Embodiment
On the basis of primary standard white clay causticization, add impurity such as flocculation agent precipitation coal ash after former green liquor is clarified, to white clay wash, a carbonization, sieve, the secondary carbonization, separate wadding, sieve.Used flocculation agent is a lime; The white clay washing is twice pre-hanging vacuum filter washing, one section pressure filter washing; Carbonization is to feed technical grade CO
2Control pH value 9.0-9.5; Sieve to once sieving the 80-100 order, the secondary sieve is the 300-320 order; Separating wadding is by cracking flossing machine, utilizes zirconium oxide bead to be grinding medium, grinds, and finally reaches the particle size range of 16-19 micron.
The lime carbonate that utilizes the white clay deep processing adds in the ratio of 50-60% with existing cheap talcum powder as cultural paper wadding, and retention is than using wherein a kind of high 2-3% separately, and product thickness, smoothness all improve simultaneously.Hanging down about 200-250 unit/ton than buying fine particle calcium carbonate aspect the cost.
Claims (2)
1. a white clay that utilizes straw pulp alkali to reclaim prepares the method for lime carbonate, it is characterized in that with following process combination being that the following step carries out: (1) former green liquor clarification, (2) add the flocculation agent precipitation, (3) white clay washs, (4) carbonizations, sieve (5), (6) secondary carbonization, (7) separate wadding, sieve (8).
2. the white clay that utilizes straw pulp alkali to reclaim according to claim 1 prepares the method for lime carbonate, and it is characterized in that: the flocculation agent in the step (2) is a lime; White clay washing in the step (3) is twice pre-hanging vacuum filter washing, one section pressure filter washing; Carbonization in step (4) and (6) is to feed technical grade CO
2Control pH value 9.0-9.5; In the step (5) sieve for once sieving the 80-100 order, the secondary sieve is the 300-320 order; It is by cracking flossing machine that separating in the step (7) wadded a quilt with cotton, and utilizes zirconium oxide bead to be grinding medium, grinds, and finally reaches the particle size range of 16-19 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101151314A CN101186326A (en) | 2007-11-23 | 2007-11-23 | Method for preparing calcium carbonate from reclaimed white mud of straw pulp production alkali |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101151314A CN101186326A (en) | 2007-11-23 | 2007-11-23 | Method for preparing calcium carbonate from reclaimed white mud of straw pulp production alkali |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101186326A true CN101186326A (en) | 2008-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101151314A Pending CN101186326A (en) | 2007-11-23 | 2007-11-23 | Method for preparing calcium carbonate from reclaimed white mud of straw pulp production alkali |
Country Status (1)
| Country | Link |
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| CN (1) | CN101186326A (en) |
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 |
| CN103387253A (en) * | 2013-05-10 | 2013-11-13 | 岳阳林纸股份有限公司 | Carbonization process for white mud by using flue gas of alkali recovery boiler |
| CN105839173A (en) * | 2016-03-21 | 2016-08-10 | 中国制浆造纸研究院 | Preparation method of white mud calcium carbonate whisker |
| 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 |
| CN109650433A (en) * | 2019-02-13 | 2019-04-19 | 广东鼎丰纸业有限公司 | The method of slurrying alkali collection green liquor purification manufacture high-purity calcium carbonate |
| CN110697753A (en) * | 2019-10-23 | 2020-01-17 | 王亚双 | Method for preparing high-concentration calcium carbonate slurry from alkali recovery white mud and recycling calcium carbonate slurry |
-
2007
- 2007-11-23 CN CNA2007101151314A patent/CN101186326A/en active Pending
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 |
| CN103387253A (en) * | 2013-05-10 | 2013-11-13 | 岳阳林纸股份有限公司 | Carbonization process for white mud by using flue gas of alkali recovery boiler |
| CN105839173A (en) * | 2016-03-21 | 2016-08-10 | 中国制浆造纸研究院 | Preparation method of white mud calcium carbonate whisker |
| 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 |
| CN109650433A (en) * | 2019-02-13 | 2019-04-19 | 广东鼎丰纸业有限公司 | The method of slurrying alkali collection green liquor purification manufacture high-purity calcium carbonate |
| CN109650433B (en) * | 2019-02-13 | 2019-12-03 | 广东鼎丰纸业有限公司 | The method of slurrying alkali collection green liquor purification manufacture high-purity calcium carbonate |
| CN110697753A (en) * | 2019-10-23 | 2020-01-17 | 王亚双 | Method for preparing high-concentration calcium carbonate slurry from alkali recovery white mud and recycling calcium carbonate slurry |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080528 |