CN1169634C - White clay recovering process - Google Patents
White clay recovering process Download PDFInfo
- Publication number
- CN1169634C CN1169634C CNB011445351A CN01144535A CN1169634C CN 1169634 C CN1169634 C CN 1169634C CN B011445351 A CNB011445351 A CN B011445351A CN 01144535 A CN01144535 A CN 01144535A CN 1169634 C CN1169634 C CN 1169634C
- Authority
- CN
- China
- Prior art keywords
- white clay
- impurities
- present
- work procedure
- sieved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Paper (AREA)
Abstract
The present invention relates to the technology for recovering white clay which is a side product generated in the production of paper-making industry. The white clay recovering technology comprises the following work procedures: step 1, the material is mixed; step 2, the material is sieved, and impurities are removed; step 3, the material is cleaned; step 4, CO2 gas is added for carbonating treatment; step 5, the material is sieved, and the impurities are removed; step 6, the material is primarily stored. The present invention has the improvement that the present invention also comprises the following work procedures: step 7, the material is ground; step 8, the material is sieved, and the impurities are removed. The present invention has the solving proposal that the grinding work procedure of using a vertical sand mill and the sieving and impurity removing work procedure are added on the basis of the traditional water washing method. The grinding work procedure of using the vertical sand mill is the key point of the refining treatment of the white clay, and can separate partial silicon salt and process CaCO3 particles in a fine state. The sieving and impurity removing work procedure can pick out the impurities of silicon, graphitic carbon, etc., after the white clay is processed into a regular state. Then the white clay is used as the paper-making filling material to be directly and backward filled. Thus, environmental pollution is avoided and resources are saved.
Description
Technical field
The present invention relates to a kind of accessory substance---recovery technology of white clay that in paper industry is produced, produces.
Background technology
In recent years, China's paper-making industry had had very great development, but because China's timber resources scarcity, and straw resource is abundant and cheap, so paper making raw material is based on non-wood-fiber, and in quite long from now on period, still keep the straw pulp, reed pulp, sugarcane slurry of some etc.In present paper industry, the causticization white clay is the accessory substance in the alkali recovery process, and its processing method mainly contains calcination method, chemical method, WATER-WASHING METHOD.1, calcination method mainly is applicable to wood pulp papermaking, is straw pulp class raw material but at present China extensively adopts, and because impurity such as silicon is too much in the causticization white clay, and being subjected to cost, technical restriction, calcination method is not suitable for papermaking straw pulp.2, adopt chemical method need dose chemical assistant, cost is not suitable for industrial production than higher.3, WATER-WASHING METHOD is that most of impurity and residual alkali that the white clay of caustic room discharge is removed wherein through several washing, carbonating processing and filtration operation are prepared into the filler that can supply papermaking to use.This method once was applied among a small circle, but along with press to improving constantly that paper product requires, can not satisfy the raw material standard of papermaking with the calcium carbonate of this simple process production.Because this material agglomerated particle quality is more open, fineness and whiteness are not high, usually occur the dry linting phenomenon in printing process, are difficult to satisfy present print request.Therefore, in view of above-mentioned several reasons, a lot of papermaking producer directly discharges the causticization white clay outside the factory or carries out landfill, and so both contaminated environment caused the waste of resource again.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of new white clay recovering process, makes it on the basis of existing WATER-WASHING METHOD, increases grinding, removal of impurities operation, thereby improves the whiteness and the fineness of white clay greatly.
Technical problem to be solved by this invention is realized by following technical scheme:
This white clay recovering process comprises following operation: (1) batching: white clay is mixed with water, fully stir, make suspension; (2) sieve that removal of impurities, (3) are cleaned, (4) add CO
2Gas carries out that carbonating is handled, (5) sieve removal of impurities, (6) elementary storage, and its improvements are also to comprise following operation: grind (7), (8) removal of impurities of sieving.
Above-mentioned white clay recovering process, through behind (7) grinding step, material particular diameter is the 4-15 micron.
Above-mentioned white clay recovering process, described (8) sieve, and to count minimum be 325 orders for the order of the required sieve that passes through of removal of impurities operation.
Solution of the present invention is on the basis of traditional WATER-WASHING METHOD, has increased the grinding step and the removal of impurities operation of sieving of using vertical grinding machine.It is the key of white clay refinement treatment that vertical grinding machine grinds, and by this procedure part silicon salt is separated and CaCO
3The particle expansion is meticulous.The removal of impurities operation of sieving can make white clay obtaining rejecting after regular impurity such as wherein silicon, free carbon, then as the direct backfill of papermaking filler again.So both avoid contaminated environment, saved resource again.Below provide the check and analysis result of white clay before and after grinding:
Before the grinding: whiteness: 81;
Free alkali: 0.084%;
125 screen residues: 0.47%;
Settling volume: three hours is 3.0ml/g, and sedimentation is 2.95ml/g fully.
Grind the back: whiteness: 86;
Free alkali: 0.084%;
325 screen residues: 0.014%;
Settling volume: three hours is 6.0ml/g, and sedimentation is 4.25ml/g fully.
Through more as can be seen, spend than improving 5 before grinding after the grinding of white clay whiteness; Settling volume grinds the back than grinding the preceding 1.3ml/g of raising fully, and the residue on sieve after the grinding is also than low before grinding, and as seen, white clay has bigger improvement by the flatteness that grinds the back particle.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below provide one embodiment of the present of invention:
As shown in Figure 1, after white clay batching (be about to white clay and mix with water, fully stir, make suspension), the removal of impurities of sieving is gone into purge tank and is cleaned.Through adding the circulation of water-stir-precipitate-discharge water-add water, its pH value descends the white clay slurries in purge tank.White clay slurry after the washing pumps into carbonation tank, and adds CO
2Gas carries out carbonating to be handled, and the carbonating time is determined according to pH value (active CaO).When pH value met the requirements, white clay was through the vibratory sieve removal of impurities, and deposited storage tank in.Then elementary white clay raw material is pumped into special vertical grinding machine and grind, after grinding, the particle diameter of white clay material is between the 4-15 micron.After the grinding white clay material is crossed 325 mesh sieves, remove the impurity such as silicon salt, carbon of sand shape.Enter batch tank at last, be configured to certain density slurry with other filler by a certain percentage and make finished product, use for papermaking.
Claims (3)
1. a white clay recovering process comprises following operation: (1) batching: white clay is mixed with water, fully stir, make suspension; (2) sieve that removal of impurities, (3) are cleaned, (4) add CO
2Gas carries out that carbonating is handled, (5) sieve removal of impurities, (6) elementary storage, it is characterized in that also comprising following operation: grind (7), (8) removal of impurities of sieving.
2. a kind of white clay recovering process according to claim 1 is characterized in that material particular diameter is the 4-15 micron through behind (7) grinding step.
3. a kind of white clay recovering process according to claim 1, to count minimum be 325 orders for the order of the required sieve that passes through of removal of impurities operation to it is characterized in that sieving described (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011445351A CN1169634C (en) | 2001-12-19 | 2001-12-19 | White clay recovering process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011445351A CN1169634C (en) | 2001-12-19 | 2001-12-19 | White clay recovering process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1349861A CN1349861A (en) | 2002-05-22 |
| CN1169634C true CN1169634C (en) | 2004-10-06 |
Family
ID=4677653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011445351A Expired - Fee Related CN1169634C (en) | 2001-12-19 | 2001-12-19 | White clay recovering process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1169634C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320205C (en) * | 2004-07-27 | 2007-06-06 | 岳阳纸业股份有限公司 | Technology for mfg, high whiteness paper making filling light calcium carbonate recovered from lime mud |
| CN100441508C (en) * | 2007-01-21 | 2008-12-10 | 岳阳纸业股份有限公司 | New technique for refining filler of calcium carbonate from lime mud |
| CN102553890A (en) * | 2012-01-18 | 2012-07-11 | 牟作峰 | White mud recycling method |
| WO2014086048A1 (en) * | 2012-12-09 | 2014-06-12 | 李广 | High-concentration carbonation method for adjusting shape of lime mud (calcium carbonate) particles |
| CN103509377B (en) * | 2013-08-23 | 2015-11-25 | 中国制浆造纸研究院 | Calcium carbonate pigment that a kind of alkali recovery white slime is refining and preparation method thereof |
| CN104803405A (en) * | 2014-01-28 | 2015-07-29 | 李广 | White mud calcium carbonate treatment technology |
| CN104532650A (en) * | 2014-07-10 | 2015-04-22 | 华南理工大学 | Method for preparing white clay filling material for improving paper AKD glue applying efficiency |
-
2001
- 2001-12-19 CN CNB011445351A patent/CN1169634C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1349861A (en) | 2002-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101391794B (en) | Novel method for preparing light calcium carbonate by recovering solid white slime through alkaline pulping | |
| CN1225586C (en) | Improved alkali recovering process from paper-making black liquor | |
| CN101020182B (en) | Process of comprehensively utilizing caustic sludge from papermaking industry | |
| CN100441508C (en) | New technique for refining filler of calcium carbonate from lime mud | |
| US6207015B1 (en) | Process for recovering raw materials from paper industry mechanical waste sludge | |
| KR20010041098A (en) | Calcium carbonate synthesis method and resulting products | |
| CN1844572A (en) | Biocatalytic clean pulping agent and application process thereof | |
| CN1169634C (en) | White clay recovering process | |
| WO2021080870A2 (en) | Method of making purified precipitated calcium carbonate from lime mud | |
| CN101418527B (en) | Deinking process for waste paper | |
| CN1239166A (en) | Process for causticizing green solution of alkali recovered from black liquid of paper-making | |
| CN109467112A (en) | A kind of aragonitic seed and aragonitic precipitated calcium carbonate and preparation method thereof | |
| CN1554588A (en) | Process for producing super fine barium sulfate and calcium carbonate using chloralkali salt mud | |
| CN1441117A (en) | Technological process of recovering white clay to produce stuffing calcium carbonate | |
| CN1292052A (en) | Method for removing wax from pulp furnish | |
| CN1228503C (en) | Technological system for producing environment protection type paper pulp | |
| US6193945B1 (en) | Method of recovering calcium from waste material or contaminated natural calcic material | |
| CN101823736A (en) | Method for co-production of calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge | |
| CN111468503B (en) | Waste supporting ball recovery processing method | |
| TW200823156A (en) | A method for manufacturing high purity calcium carbonate powder from marble sludge | |
| CN1320205C (en) | Technology for mfg, high whiteness paper making filling light calcium carbonate recovered from lime mud | |
| CN108330729B (en) | White clay filler and application thereof in cultural paper machine | |
| CN1587508A (en) | Method for producing light calcium carbonate product with white mud | |
| CN101108390A (en) | White clay recycling process | |
| CN112499656A (en) | Treatment method of discharged salt causticization slurry in alumina production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |