CN105461278A - Preparation method of modified fluorgypsum powder - Google Patents
Preparation method of modified fluorgypsum powder Download PDFInfo
- Publication number
- CN105461278A CN105461278A CN201510854652.6A CN201510854652A CN105461278A CN 105461278 A CN105461278 A CN 105461278A CN 201510854652 A CN201510854652 A CN 201510854652A CN 105461278 A CN105461278 A CN 105461278A
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- CN
- China
- Prior art keywords
- powder
- preparation
- fluorine gypsum
- slag
- modification
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- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a preparation method of modified fluorgypsum powder. Fluorgypsum waste residues after production of hydrofluoric acid are cooled through a horizontal cooling converter, saponification slag and quicklime are added, the mixture is uniformly mixed, the mixture, alums and fly ash are jointly subjected to ball milling, and the modified fluorgypsum powder is prepared. According to the preparation method of the modified fluorgypsum powder, the preparation process is simple, a few procedures are adopted, generation of pungent smell is effectively reduced in the preparation process, the cost is low, and the prepared modified fluorgypsum powder is wide in application range.
Description
Technical field
The present invention relates to comprehensive utilization of resources and the field of Environment Protection of industrial solid castoff, be specially a kind of preparation method of modification fluorine gypsum powder.
Background technology
By Fluorspar Powder (CaF
2) and the vitriol oil (H
2sO
4) coordinate (mass ratio 1: 1.3) by a certain percentage, in rotary kiln, heat (250 DEG C ~ 280 DEG C), after chemical reaction (H
2sO
4+ CaF
2=2HF+CaSO
4) obtain hydrogen fluoride (HF) and calcium sulfate (CaSO
4), hydrogen fluoride gas collects obtained hydrofluoric acid through condensation, and the solid product calcium sulfate of reaction is gypsum, because wherein containing a small amount of still unreacted CaF
2, so be also called " fluorgypsum ".A certain amount of H is often mixed in residue
2sO
4, HF and CaF
2, they are still reacting lentamente, and therefore fluorgypsum is in acid.Hydrofluoric acid has severe irritation smell, and the fluorgypsum slag temperature of therefore just having discharged is more than 200 DEG C, and temperature is high, and water vapor is large, has dense irritating smell.Surrounding environment is made a big impact.Major part fluorgypsum is just stored up as general solid waste after neutralizing treatment a little, directly stores up not only land occupation, and contaminated soil and groundwater environment.
To the existing a lot of research of the comprehensive utilization of fluorgypsum, Chinese patent ZL201410025731.1, a kind of preparation method of fluorgypsum decorative partition board, modification has been carried out to fluorgypsum slag, because cooling soaking time is long, make process duration, processing efficiency is not high; Chinese patent 201110026571.9 1 kinds utilizes the method for wet fluorgypsum modified building terra alba, and wet gypsum treatment has the operation such as natural air drying or oven dry, fragmentation, low-temperature bake, and making processes has obvious irritating smell.Tradition adds the technique with waste slag of fluorine gypsum in alkaline calcium powder, in fact turn increases the output of waste residue, and the reasonable alkaline calcium powder of taste is become waste slag of fluorine gypsum, is also a kind of waste.
Saponification slag is the waste residue adopting chlor-alkali to produce output in propylene oxide process, and saponification slag main component is Ca (OH)
2deng.The saponification slag of nearly 1,000,000 tons of chemical company's output of annual production propylene oxide, these waste from stackings, as mountain, do not occupy factory site, are difficult to process, and have impact to environment.
Making full use of these industrial residues and prepare environmental-friendly construction material, is the needs of national policy, environment protection.
Summary of the invention
The preparation method of a kind of modification fluorine gypsum powder of the present invention, makes full use of waste slag of fluorine gypsum and saponification slag, and preparation modification fluorine gypsum powder, adopts rational technique, the irritating smell in abatement process.
Technical scheme of the present invention is achieved in that
A kind of preparation method of modification fluorine gypsum powder is:
(1) waste slag of fluorine gypsum after hydrofluoric acid is produced, horizontal cooling converter is entered after waste slag of fluorine gypsum output, horizontal cooling converter passes through at pierce smith converter arranged outside spray water system, reduce the temperature of waste slag of fluorine gypsum, in horizontal cooling converter, add the saponification slag of 5 ~ 10% simultaneously, mixing 5 ~ 10min, while adding saponification slag, due to acid-base neutralisation reaction, HF content is reduced, irritating smell reduces, adding of normal temperature saponification slag, the temperature of fluorgypsum slag is reduced further, temperature reduces, reduce molecular thermalmotion, reduce the diffusion of irritating smell,
Add the calcium lime powder of 0.5 ~ 5% again, regulate PH to be 7 ~ 8, mix; Adding of calcium lime powder, consume unnecessary moisture, be reacted into calcium hydroxide, make fluorgypsum slag water ratio now be down to about 1%;
(2) by the above-mentioned powder mixed, in powder: alum: the ratio of flyash=1:0 ~ 2:0.2 ~ 0.3 adds ball mill, 200 ~ 250 orders are milled to, obtained modification fluorine gypsum powder.
Saponification slag used is the waste residue adopting chlor-alkali to produce output in propylene oxide process;
Described horizontal cooling converter reaches cooling-down effect by adding waterworks outside pierce smith converter.
The present invention has following progressive part:
Utilize industrial by-product saponification slag, with the acidity of fluorgypsum slag in carrying out, solid waste reduces costs while utilizing;
The use of horizontal cooling converter, makes the temperature of fluorgypsum slag reduce, and is beneficial to the abatement of irritating smell and the volatilization reducing objectionable impurities;
Add alum grinding together with flyash, flyash increases modification fluorine gypsum powder and uses the workability added water when stirring, and effectively fills hole during fluorine gypsum powder reaction, adding of alum, reduces the time of coagulation of fluorine gypsum powder;
This modification fluorine gypsum powder can be applicable to multi-field, such as, for the retardant of cement, gypsum block, gypsum lath, gypsum mortar, admixture cement and chemical admixture can prepare building and answer light partition board and self-leveling material etc.
The preparation method of modification fluorine gypsum powder of the present invention, manufacture craft is simple, and operation is few, and effectively cut down the output of irritating smell in making processes, cost is low, the modification fluorine gypsum powder applied range of preparation.
Embodiment
1, case study on implementation
A kind of preparation method of modification fluorine gypsum powder:
(1) produce the waste slag of fluorine gypsum after hydrofluoric acid, after waste slag of fluorine gypsum output, enter horizontal cooling converter, in horizontal cooling converter, add the saponification slag of 6% simultaneously, mixing 8min, then add the calcium lime powder of 0.5%, regulate PH to be 7 ~ 8, mix;
(2) by the above-mentioned powder mixed, in powder: alum: the ratio of flyash=1:1:0.2 adds ball mill, 200 ~ 250 orders are milled to, obtained modification fluorine gypsum powder.
Waste slag of fluorine gypsum after production hydrofluoric acid used is Zibo Fei Yuan Chemical Co., Ltd. output;
Saponification slag used is Shandong Haili Chemical Industry Co., Ltd.'s output;
Prepared modification fluorine gypsum powder, according to water cement ratio=1:0.39, the modification fluorine gypsum powder building block of preparing, over dry ultimate compression strength 23.2Mpa, folding strength is 8.9Mpa.
2, case study on implementation
A kind of preparation method of modification fluorine gypsum powder:
(1) produce the waste slag of fluorine gypsum after hydrofluoric acid, after waste slag of fluorine gypsum output, enter horizontal cooling converter, in horizontal cooling converter, add the saponification slag of 8% simultaneously, mixing 8min, then add the calcium lime powder of 0.6%, regulate PH to be 7 ~ 8, mix;
(2) by the above-mentioned powder mixed, in powder: alum: the ratio of flyash=1:0:0.2 adds ball mill, 200 ~ 250 orders are milled to, obtained modification fluorine gypsum powder.
Saponification slag is the waste residue adopting chlor-alkali to produce output in propylene oxide process;
Prepared modification fluorine gypsum powder, according to water cement ratio=1:0.42, the modification fluorine gypsum powder building block of preparing, over dry ultimate compression strength 20.2Mpa, folding strength is 6.7Mpa.
Claims (3)
1. a preparation method for modification fluorine gypsum powder, is characterized in that:
(1) produce the waste slag of fluorine gypsum after hydrofluoric acid, after waste slag of fluorine gypsum output, enter horizontal cooling converter, in horizontal cooling converter, add the saponification slag of 5 ~ 10% simultaneously, mixing 5 ~ 10min, then add the calcium lime powder of 0.5 ~ 5%, regulate PH to be 7 ~ 8, mix;
(2) by the above-mentioned powder mixed, in powder: alum: the ratio of flyash=1:0 ~ 2:0.2 ~ 0.3 adds ball mill, 200 ~ 250 orders are milled to, obtained modification fluorine gypsum powder.
2. the preparation method of a kind of modification fluorine gypsum powder according to claim 1, is characterized in that saponification slag used is the waste residue adopting chlor-alkali to produce output in propylene oxide process.
3. the preparation method of a kind of modification fluorine gypsum powder according to claim 1, is characterized in that described horizontal cooling converter reaches cooling-down effect by adding waterworks outside pierce smith converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510854652.6A CN105461278A (en) | 2015-11-30 | 2015-11-30 | Preparation method of modified fluorgypsum powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510854652.6A CN105461278A (en) | 2015-11-30 | 2015-11-30 | Preparation method of modified fluorgypsum powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105461278A true CN105461278A (en) | 2016-04-06 |
Family
ID=55599504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510854652.6A Pending CN105461278A (en) | 2015-11-30 | 2015-11-30 | Preparation method of modified fluorgypsum powder |
Country Status (1)
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| CN (1) | CN105461278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113563040A (en) * | 2021-08-16 | 2021-10-29 | 陕西鑫洛建筑节能科技有限公司 | Fluorine gypsum powder, preparation method and prepared gypsum block |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069472A (en) * | 1992-08-15 | 1993-03-03 | 浙江省金华化工厂 | Utilize the fluorine slag to make the method for gypsum for cement fast |
| CN101121595A (en) * | 2007-07-11 | 2008-02-13 | 湖北中科博策新材料研究院 | Preparation for environmental protection energy-saving building base material by modifying AHF industrial residue-fluorgypsum and technique thereof |
| 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 |
| 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 |
| CN202885575U (en) * | 2012-11-19 | 2013-04-17 | 江西省东沿药业有限公司 | Fluorgypsum cooling furnace |
-
2015
- 2015-11-30 CN CN201510854652.6A patent/CN105461278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069472A (en) * | 1992-08-15 | 1993-03-03 | 浙江省金华化工厂 | Utilize the fluorine slag to make the method for gypsum for cement fast |
| CN101121595A (en) * | 2007-07-11 | 2008-02-13 | 湖北中科博策新材料研究院 | Preparation for environmental protection energy-saving building base material by modifying AHF industrial residue-fluorgypsum and technique thereof |
| 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 |
| 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 |
| CN202885575U (en) * | 2012-11-19 | 2013-04-17 | 江西省东沿药业有限公司 | Fluorgypsum cooling furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113563040A (en) * | 2021-08-16 | 2021-10-29 | 陕西鑫洛建筑节能科技有限公司 | Fluorine gypsum powder, preparation method and prepared gypsum block |
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Application publication date: 20160406 |
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