CN104119012B - A kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum - Google Patents
A kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum Download PDFInfo
- Publication number
- CN104119012B CN104119012B CN201310149212.1A CN201310149212A CN104119012B CN 104119012 B CN104119012 B CN 104119012B CN 201310149212 A CN201310149212 A CN 201310149212A CN 104119012 B CN104119012 B CN 104119012B
- Authority
- CN
- China
- Prior art keywords
- gypsum
- mixed
- filter
- dry method
- waste residue
- 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
Abstract
Recycle the technique that dihydrate gypsum prepared by press filtration fluorine waste residue, comprise the following steps: the per-cent pressing row weight part takes raw material: dry method gypsum 20%-40%, wet gypsum 40-60%, filter-press residues 15%-25%, compound additive 0.5%-1.5%; Dry method gypsum and filter-press residues are mixed in proportion; Join in mixed broken machine by the material mixed, the gypsum that wets, compound additive, the raw meal particle size controlled after mixed breaking is not more than 100mm; Ageing and aquation: material is stored up 48-96 hour, namely obtain dihydrate gypsum.The product SO3 content that the present invention produces more than 38%, crystal water content more than 8%, attached water content is within 12%.Because of containing a small amount of attached water, dust is not in use almost had to produce, no acidic, belong to environmentally friendly product.
Description
Technical field
The present invention relates to building materials preparation technology, be specially a kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum.
Background technology
A kind of wet processing that adopts produces hydrofluoric acid, and this technique has stopped producing, but have accumulated about 4,000,000 tons of waste residues over the years, and waste residue content is CaSO4.XH2O.The waste residue that wet processing produces is called for short wet gypsum, stack in stockyard after pulp, neutralizing treatment, after stacking three months, most aquation becomes the dihydrate gypsum (crystal water content is about 2-4%) containing crystal water, but attached water higher (attached water content is about 25-30%), this gypsum is high because of attached water content, substantially can not separately for manufacture of cement.
A kind of production technique adopts Germany technology to carry out dry production, and the main content of dry powder waste residue of generation is anhydrous CaSO4.The waste residue that dry process produces is called for short dry method gypsum, after stacking cooling, can be directly used in manufacture of cement.Dry method gypsum is anhydrite, SO3 content is up to more than 52%, but not containing crystal water, special process and technology need be adopted to use, because it is large, acid high containing crystal water, dust pollution, most cement mill can not use this product, causes added value of product not high, and has a certain impact to environment.
The another kind of waste residue containing Fe2-producing potassium fluotitanate and potassium fluoborate generation, after press filtration, water content is up to 40%, is called for short filter-press residues.
Summary of the invention
Technical problem solved by the invention is to provide a kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum, to solve the shortcoming in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
Recycle the technique that dihydrate gypsum prepared by press filtration fluorine waste residue, comprise the following steps:
The first step: the per-cent pressing row weight part takes raw material:
Dry method gypsum 20%-40%
Wet gypsum 40-60%
Filter-press residues 15%-25%
Compound additive 0.5%-1.5%;
Second step: dry method gypsum and filter-press residues are mixed in proportion;
3rd step: join in mixed broken machine by the material mixed, the gypsum that wets, compound additive, the raw meal particle size controlled after mixed breaking is not more than 100mm;
4th step: ageing and aquation: material is stored up 48-96 hour, namely obtain dihydrate gypsum.
Know-why: the proportioning adopting dry method gypsum 30%, wet gypsum 50%, filter-press residues 20%, compound additive to account for 1% of total amount has done a simultaneous test: first group adopts unoxidized black filter-press residues, the filter-press residues that another group adopts complete oxidation to take on a red color.Its set time and intensity within second day, is checked to find: first group did not all have enough solidification intensities after 30 hours, and second group has only just possessed the intensity of available forklift windrow for 20 hours.This test-results is greatly inspiring, as long as namely filter-press residues takes on a red color, just can capture long technical barrier block gypsum time of coagulation.Through Hunan fluorine company leader and relevant technologies People Analysis, as long as improve the problem that substantially can solve filter-press residues and take on a red color a little to existing apparatus.
Beneficial effect: the product SO3 content that the present invention produces more than 38%, crystal water content more than 8%, attached water content is within 12%.Because of containing a small amount of attached water, dust is not in use almost had to produce, no acidic, belong to environmentally friendly product.This product can substitute completely the plaster of paris for cement setting retarder, and has than plaster of paris better properties: effective component content is high and stable, client without the need to fragmentation again, cement later strength 2-4MPa can be increased.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
embodiment 1
The per-cent pressing row weight part takes raw material: dry method gypsum 30%, wet gypsum 50%, filter-press residues 19%, compound additive 1%; Dry method gypsum and filter-press residues are mixed in proportion; Join in mixed broken machine by the material mixed, the gypsum that wets, compound additive, the raw meal particle size controlled after mixed breaking is not more than 90mm; Ageing and aquation: material is stored up 72 hours, namely obtain dihydrate gypsum.
embodiment 2
The per-cent pressing row weight part takes raw material: dry method gypsum 25%, wet gypsum 55%, filter-press residues 19%, compound additive 1%; Dry method gypsum and filter-press residues are mixed in proportion; Join in mixed broken machine by the material mixed, the gypsum that wets, compound additive, the raw meal particle size controlled after mixed breaking is not more than 100mm; Ageing and aquation: material is stored up 48 hours, namely obtain dihydrate gypsum.
embodiment 3
The per-cent pressing row weight part takes raw material: dry method gypsum 35%, wet gypsum 45%, filter-press residues 19%, compound additive 1%; Dry method gypsum and filter-press residues are mixed in proportion; Join in mixed broken machine by the material mixed, the gypsum that wets, compound additive, the raw meal particle size controlled after mixed breaking is not more than 80mm; Ageing and aquation: material is stored up 96 hours, namely obtain dihydrate gypsum.
For preventing the moisture content blocking hopper and reduce in filter-press residues, filter-press residues and part dry method gypsum are carried out premixing with forklift by a certain percentage.After wet gypsum, dry method gypsum, filter-press residues that premixing is good, admixture are measured by a certain percentage by hopper through Belt Conveying to mixed broken machine (being formed by the transformation of JS750 machine,massing), product granularity is controlled within 100mm.Material, after mixed broken machine mixing fragmentation, stacks field through belt conveyor to work in-process.Under the effect of admixture, the CaSO4 in dry method gypsum (for without water anhydrite) can change into the dihydrate gypsum containing crystal water.After stacking ageing and aquation through 3 days, product attached water content reduces further.The product be up to the standards just can dispatch from the factory in shipping.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention; the technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (1)
1. recycle the technique that dihydrate gypsum prepared by press filtration fluorine waste residue, it is characterized in that, comprise the following steps:
The first step: the per-cent pressing row weight part takes raw material:
Dry method gypsum 20%-40%
Wet gypsum 40-60%
Filter-press residues 15%-25%
Compound additive 0.5%-1.5%;
Second step: dry method gypsum and filter-press residues are mixed in proportion;
3rd step: join in mixed broken machine by the material mixed, the gypsum that wets, compound additive, the raw meal particle size controlled after mixed breaking is not more than 100mm;
4th step: ageing and aquation: material is stored up 48-96 hour, namely obtain dihydrate gypsum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149212.1A CN104119012B (en) | 2013-04-26 | 2013-04-26 | A kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149212.1A CN104119012B (en) | 2013-04-26 | 2013-04-26 | A kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104119012A CN104119012A (en) | 2014-10-29 |
| CN104119012B true CN104119012B (en) | 2016-03-02 |
Family
ID=51764682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310149212.1A Expired - Fee Related CN104119012B (en) | 2013-04-26 | 2013-04-26 | A kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104119012B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172798A (en) * | 2007-10-30 | 2008-05-07 | 中国水利水电第十四工程局 | Building gypsum and mineral additive, and method of manufacturing the same |
| CN101348341A (en) * | 2008-09-16 | 2009-01-21 | 孙小力 | Manufacturing method for producing construction gypsum from boiler tail gas |
| CN101979353A (en) * | 2010-10-29 | 2011-02-23 | 福建省邵武市永飞化工有限公司 | Fluorgypsum modifying method and process for producing other chemical products by using fluorgypsum |
| JP4735438B2 (en) * | 2006-06-23 | 2011-07-27 | 宇部興産株式会社 | Anhydrous gypsum powder and method for producing the same |
| CN102633453A (en) * | 2012-05-11 | 2012-08-15 | 武汉大学 | Neutral modifying agent for fluorgypsum and method for utilizing neutral modifying agent to modify fluorgypsum |
-
2013
- 2013-04-26 CN CN201310149212.1A patent/CN104119012B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4735438B2 (en) * | 2006-06-23 | 2011-07-27 | 宇部興産株式会社 | Anhydrous gypsum powder and method for producing the same |
| CN101172798A (en) * | 2007-10-30 | 2008-05-07 | 中国水利水电第十四工程局 | Building gypsum and mineral additive, and method of manufacturing the same |
| CN101348341A (en) * | 2008-09-16 | 2009-01-21 | 孙小力 | Manufacturing method for producing construction gypsum from boiler tail gas |
| CN101979353A (en) * | 2010-10-29 | 2011-02-23 | 福建省邵武市永飞化工有限公司 | Fluorgypsum modifying method and process for producing other chemical products by using fluorgypsum |
| CN102633453A (en) * | 2012-05-11 | 2012-08-15 | 武汉大学 | Neutral modifying agent for fluorgypsum and method for utilizing neutral modifying agent to modify fluorgypsum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104119012A (en) | 2014-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101565293B (en) | modified phosphogypsum and preparation method thereof | |
| EP2036869B1 (en) | Methods for manufacturing a calcined gypsum and a gypsum board | |
| CN102351453B (en) | Cement retarder and method for direct preparation of same by using semi-hydrated phosphogypsum | |
| CN109734344B (en) | Method for preparing cement retarder by using semi-hydrated phosphogypsum | |
| CN104649643A (en) | Modified desulfurized gypsum based slurry for permanent composite heat preservation formwork | |
| CN104045270A (en) | Cement base-free waterproof anti-cracking mortar and production method thereof | |
| CN104310849B (en) | A kind of concrete accelerator | |
| CN104086149A (en) | Preparation method for phosphogypsum baking-free brick | |
| CN102745926A (en) | Modified phosphogypsum and preparation method thereof | |
| CN102910883A (en) | Antimony tailing aerated concrete block and preparation method thereof | |
| CN101182161A (en) | Magnesium-slag aerated concrete block and method for making same | |
| CN106698988B (en) | Carbonate rock modified phosphogypsum and preparation method thereof | |
| CN102674736A (en) | Preparation method of desulfurization building gypsum retarder | |
| CN101891410B (en) | Method for preparing powdery calcium sulphate retarder | |
| CN111892381A (en) | Brick making process by utilizing solid building waste | |
| CN102285773A (en) | Phosphogypsum-cement retarder and preparation method thereof | |
| CN106277993A (en) | A kind of preparation method of environment-friendly baking-free bricks | |
| CN103359989A (en) | Waste treatment method adopting brick making process | |
| CN104119012B (en) | A kind of technique recycling press filtration fluorine waste residue and prepare dihydrate gypsum | |
| CN101475329B (en) | Modified phosphogypsum powder and product thereof | |
| CN104016602B (en) | Industrial residue titanium gypsum is used as the preparation method of cement ingredient | |
| CN109485281A (en) | A kind of method of ardealite online production building material | |
| CN104961362B (en) | A kind of titanium gypsum and its preparation process using alkaline residue preparation | |
| JP6497864B2 (en) | Ground improvement composition and method for producing ground improvement composition | |
| CN113185159A (en) | Efficient physical modification method for titanium gypsum |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20170426 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |