CN101024568B - Method for making paper-face gypsum board using high-alkaline-metal content phospheor gypsum - Google Patents
Method for making paper-face gypsum board using high-alkaline-metal content phospheor gypsum Download PDFInfo
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- CN101024568B CN101024568B CN2006100548384A CN200610054838A CN101024568B CN 101024568 B CN101024568 B CN 101024568B CN 2006100548384 A CN2006100548384 A CN 2006100548384A CN 200610054838 A CN200610054838 A CN 200610054838A CN 101024568 B CN101024568 B CN 101024568B
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- China
- Prior art keywords
- phosphogypsum
- metal content
- basic metal
- high basic
- gypsum
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method to make thistle board using phosphogypsum. It includes the following steps: mixing high alkali metal phosphogypsum that the pH value is over 3.5 with waste residues containing sal vitreous body according to 1:1%-20%, crashing, piling for 0.1 hour, taking normal process technology to gain thistle board. The waste residues is one or several from flay ash, furnace influid bed slag and blast furnace granulated slag.
Description
Affiliated technical field
The present invention relates to a kind of manufacture method of Thistle board, relating in particular to a kind of is raw material with phosphoric acid by wet process by-product high basic metal content phosphogypsum, makes the method for Thistle board.
Background technology
Phosphogypsum is the by product of phosphoric acid by wet process, is quantity discharged maximum in the chemical gypsum.Dihydrate gypsum content is higher than the common commodity plaster of paris generally more than 80～95% in the phosphogypsum, can be used as the substitute that the plaster of paris is made Thistle board.Because its foreign matter content height, particularly alkalimetal ion such as potassium, sodium and residual phosphorus content are higher, thereby make and be difficult to utilize, or utilize cost too high.As working as K in the phosphogypsum
2O, Na
2The O gross weight reaches 0.1% (butt) when above, as the direct production Thistle board, gypsum surface " scum " phenomenon can occur, makes plasterboard lose sticking paper function, at this time generally claims that this phosphogypsum is the phosphogypsum of high basic metal content.
Existing Thistle board manufacturing enterprise is when utilizing high basic metal content phosphogypsum, generally need a newly-built cover that high basic metal content phosphogypsum is carried out pretreated sizing device again, phosphogypsum is starched with water again, make the alkalimetal ion (potassium, sodium ion) of solubility enter water, by water slurry cyclonic separation, filtration, remove the alkalimetal ion of the solubility of the overwhelming majority, solve surface " scum " phenomenon, thereby the phosphogypsum that solves high basic metal content can not be used for the problem that Thistle board is produced.The characteristics of this technology are that flow process is long, investment is big, running cost is higher, and bring the difficult problem in the wastewater treatment after the washing, simultaneously the free water content of the phosphogypsum dihydrate after washing increases, and is unfavorable to the gypsum frying of follow-up workshop section, because during with dihydrate gypsum frying semi-hydrated gypsum, the free-water increase directly causes the increase of energy consumption, and cost rises thereupon.Because the problems referred to above, a lot of factories have to abandon the higher phosphogypsum of alkali metal content.
Summary of the invention
The present invention is directed to high basic metal content phosphogypsum and be difficult to use in this technical barrier of manufacturing Thistle board, purpose is to provide a kind of less investment, and technology is simple, the method with high basic metal content phosphogypsum system Thistle board that running cost is low.
The inventive method is achieved in that high basic metal content phosphogypsum is through following pre-treatment: pH value is mixed at the high basic metal content phosphogypsum more than 3.5 and the Vitrea waste residue of the silicon-aluminum containing part by weight according to 1:1%～20%, through fragmentation, behind the stack retting 0.1～24 hour, become building gypsum plaster through conventional technology frying, through grinding, Thistle board is made in ageing again.
PH value is below 3.5, and acid big phosphogypsum can take the lime neutralizing treatment to arrive pH value more than 3.5.
The Vitrea waste residue of described silicon-aluminum containing is mainly a kind of in flyash, boiling furnace slag, the blast furnace water quenching slag or several, and is wherein best with the blast furnace water quenching slag effect.The Vitrea waste residue mixed weight of described phosphogypsum dihydrate and silicon-aluminum containing than with 1:8%～15% for good, the waste residue add-on is low excessively, sticking paper effect is bad, add-on is too high, increases production cost first, second influences the intensity of plasterboard.
The present invention handles high basic metal content Pretreatment Technology of Phosphogypsum with existing water-washing method and compares, less investment, and technology is simple, and is easy to operate, and running cost is lower, and can not bring the waste water handling problem of washing process.Simultaneously, the adding of additive does not have tangible negative effect to quality index such as the intensity of Thistle board, presetting period, final setting times, can not cause the plasterboard downgrade.
Embodiment
Among the following embodiment, except that specializing, inventory all is meant butt weight.
Embodiment 1
Get that a part of high basic metal content phosphogypsum (contains K in the phosphogypsum slag field
2O, Na
2The O total amount is 0.11%), add 1% flyash after, through broken, mix and stacked 0.1 hour, slough free-water and crystal water through hammer dryer and fluidizing furnace again, grinding promptly can be used as qualified Paper-faced gyp board raw material after 30 seconds.After testing, the sticking paper of the Thistle board that this scheme is made is functional, and the presetting period, final setting time was less than 20 minutes greater than 4 minutes, and folding strength satisfies the production standard requirement of Thistle board fully greater than 2.24 MPas.
Embodiment 2
Get that a part of high basic metal content phosphogypsum (contains K in the phosphogypsum slag field
2O, Na
2The O total amount is 0.39%), add 10% flyash after, through broken, mix and stacked 3.5 hours, slough free-water and crystal water through hammer dryer and fluidizing furnace again, grinding promptly can be used as qualified Paper-faced gyp board raw material after 30 seconds.After testing, the sticking paper of the Thistle board of this scheme is functional, and the presetting period, final setting time was less than 20 minutes greater than 4 minutes, and folding strength satisfies the production standard requirement of Thistle board fully greater than 2.16 MPas.
Embodiment 3
Get that a part of high basic metal content phosphogypsum (contains K in the phosphogypsum slag field
2O, Na
2The O total amount is 0.65%), add 20% flyash (butt) after, through broken, mix and stacked 24 hours, slough free-water and crystal water through hammer dryer and fluidizing furnace again, grinding promptly can be used as qualified Paper-faced gyp board raw material after 30 seconds.After testing, the presetting period, final setting time was less than 20 minutes greater than 4 minutes, and folding strength satisfies the production standard requirement of Thistle board fully greater than 1.98 MPas.
Embodiment 4
Get that a part of high basic metal content phosphogypsum (contains K in the phosphogypsum slag field
2O, Na
2The O total amount is 0.37%), add 5% flyash (butt), add 5% blast furnace water quenching slag simultaneously after, stacked 10 hours through broken, mixing, slough free-water and crystal water through hammer dryer and fluidizing furnace again, grinding promptly can be used as qualified Paper-faced gyp board raw material after 30 seconds.After testing, the sticking paper of the Thistle board of this scheme is functional, and the presetting period, final setting time was less than 20 minutes greater than 4 minutes, and folding strength satisfies the production standard requirement of Thistle board fully greater than 2.17 MPas.
Embodiment 5
Get that a part of high basic metal content phosphogypsum (contains K in the phosphogypsum slag field
2O, Na
2The O total amount is 0.39%), add 12% boiling furnace slag after, through broken, mix and stacked 12 hours, slough free-water and crystal water through hammer dryer and fluidizing furnace again, grinding promptly can be used as qualified Paper-faced gyp board raw material after 30 seconds.After testing, the presetting period, final setting time was less than 20 minutes greater than 4 minutes, and folding strength satisfies the production standard requirement of Thistle board fully greater than 2.15 MPas.
Claims (4)
1. method of utilizing phosphoric acid by wet process by-product high basic metal content phosphogypsum system Thistle board, it is characterized in that high basic metal content phosphogypsum dihydrate is through following pre-treatment: the pH value is mixed according to 1: 1%～20% part by weight at the high basic metal content phosphogypsum dihydrate more than 3.5 and the Vitrea waste residue of silicon-aluminum containing matter, through fragmentation, and stack retting is more than 0.1 hour, and described high basic metal content phosphogypsum is represented K in the phosphogypsum
2O, Na
2The O gross weight is greater than 0.1% (butt).
2. method according to claim 1, described phosphogypsum dihydrate and silicon-aluminum containing vitreum waste residue part by weight are 1: 8%～15%.
3. method according to claim 1 and 2, the Vitrea waste residue of described silicon-aluminum containing be in flyash, boiling furnace slag, the blast furnace water quenching slag a kind of or several.
4. method according to claim 3, the Vitrea waste residue of described silicon-aluminum containing is a blast furnace water quenching slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100548384A CN101024568B (en) | 2006-02-17 | 2006-02-17 | Method for making paper-face gypsum board using high-alkaline-metal content phospheor gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100548384A CN101024568B (en) | 2006-02-17 | 2006-02-17 | Method for making paper-face gypsum board using high-alkaline-metal content phospheor gypsum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101024568A CN101024568A (en) | 2007-08-29 |
| CN101024568B true CN101024568B (en) | 2011-03-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100548384A Expired - Fee Related CN101024568B (en) | 2006-02-17 | 2006-02-17 | Method for making paper-face gypsum board using high-alkaline-metal content phospheor gypsum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101024568B (en) |
-
2006
- 2006-02-17 CN CN2006100548384A patent/CN101024568B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 刘月强等.工业废渣磷石膏生产纸面石膏板纸芯粘结性研究.《砖瓦》.2005,(第12期),52-54. * |
| 袁建中.粉煤灰炉渣在纸面石膏板生产上的应用.《广东建材》.2004,(第2期),33-36. * |
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| Publication number | Publication date |
|---|---|
| CN101024568A (en) | 2007-08-29 |
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| C10 | Entry into substantive examination | ||
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Granted publication date: 20110316 Termination date: 20140217 |