CN103496935B - The method of phosphogypsum recrystallization foam production light block - Google Patents
The method of phosphogypsum recrystallization foam production light block Download PDFInfo
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- CN103496935B CN103496935B CN201310441079.7A CN201310441079A CN103496935B CN 103496935 B CN103496935 B CN 103496935B CN 201310441079 A CN201310441079 A CN 201310441079A CN 103496935 B CN103496935 B CN 103496935B
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- phosphogypsum
- recrystallization
- whipping agent
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Abstract
The invention provides a kind of method of phosphogypsum recrystallization foam production light block, it is characterized in that: by phosphogypsum 99.6 ~ 99.9%, crystal modifier 0.1 ~ 0.4% mixes, after the pelletizing that adds water, send in autoclave, at 110 ~ 140 DEG C, under 0.13 ~ 0.16MPa, steam pressure process 3 ~ 5 hours, complete the recrystallization of phosphogypsum, after drying, pulverize, and under whipping agent effect foaming, obtain light block, make full use of the great building light-weight building block of phosphogypsum production and application amount, the density of this Ardealite block, strength grade all reaches national building materials industry JC/T698-2010 standard, ultimate compression strength can reach 3.5 MPas/M
3, quality is only 0.8 ton/M
3.Because of unburned and energy-saving and emission-reduction, because of not waste discharge, waste residue, waste gas, and realize clean and produce, there are more wide market outlook.
Description
Technical field
The present invention relates to a kind of production method of building block, the method for especially a kind of phosphogypsum recrystallization foam production light block for building, belongs to material of construction production technical field.
Background technology
The solid waste of discharging when phosphogypsum is Wet-process Phosphoric Acid Production, often produces 1 ton of phosphoric acid by generation 5 ~ 7 tons of phosphogypsums.Phosphogypsum is regarded as a kind of waste residue for a long time and stacks, and not only takies a large amount of soil, waste resource, but also brings serious environmental pollution and potential safety hazard.To 2009, China's phosphogypsum added up volume of cargo in storage more than 200,000,000 tons.The stacking problem of phosphogypsum, has become " bottleneck " that hinder phosphorus chemical industry sustainable development, has even threaten the survival and development of phosphorus chemical industry.Though carried out more work in the recent decade in phosphogypsum comprehensive utilization, as utilized producing cement retarder through phosphogypsum, high strength gypsum powder, the material of construction such as ecological walling, use filling phosphorous gypsum pit, build the road, or for improveing alkaline land soil etc., and obtain certain effect, but in phosphogypsum early stage pre-treatment and roasting etc., still there is purification difficult, energy consumption is high, unstable product quality, the problems such as phosphogypsum consumption is few, cause the recycling amount of phosphogypsum limited, phosphogypsum comprehensive utilization ratio is caused to be only 30%, and product cost is higher than traditional clay walling, lack the market competitiveness.For this reason, the comprehensive utilization of phosphogypsum is listed in resource utilization priority project, and the processing and utilizing of phosphogypsum is extremely urgent.In addition, when fully utilizing phosphogypsum, must pay the utmost attention to: one, selecting the light-weight walling material for building of the huge market demand as target product; Two, consume phosphogypsum as far as possible in a large number, make its consumption reach more than 95%.
Summary of the invention
The object of the present invention is to provide a kind of method of phosphogypsum recrystallization foam production light block, to utilize phosphogypsum to produce the maximum light-weight building building block of consumption substantially, obtain environmental protection and considerable economic benefit,
The present invention is completed by following technical proposal: a kind of method of phosphogypsum recrystallization foam production light block, is characterized in that through the following step:
A, carry out batch mixing by following mass ratio:
Phosphogypsum 99.6 ~ 99.9%
Crystal modifier 0.1 ~ 0.4%,
B, in the compound of steps A, add water to water content be 30 ~ 40 wt%, carries out pelletizing routinely;
C, the pellet of step B is sent in autoclave, 110 ~ 140 DEG C, under 0.13 ~ 0.16 MPa, steam pressure process 3 ~ 5 hours, completes the recrystallization of phosphogypsum;
D, the pellet of step C is dried to water content≤3 wt% through routine, is ground to 100 objects through routine and accounts for 60 more than wt% powders;
E, in step D gained dry mash, add the whipping agent of 1 wt% of dry powder total mass, mix, send in forming mould, after shaping routinely, obtain light block.
Described crystal modifier is: the one or several arbitrarily in citric acid, succinic acid, EDTA, dextrin, gelatin, Sodium dodecylbenzene sulfonate, OP-10, glycerol monostearate etc.
Described whipping agent is: the one or several arbitrarily in Sodium dodecylbenzene sulfonate (K12), polyoxyethylenated alcohol sodium sulfate (AES), ɑ-thiazolinyl sulfanilamide (SN) sodium (AOS), SH-126 compound water chestnut hairdressing infusion, XH-05 whipping agent, ADC whipping agent.
The pelletizing of described step B is on conventional disk pelletizer, makes pellet routinely.
The autoclave of described step C, the mould of step e are conventional equipment.
The drying of described step D is conventional seasoning, or warm air drying, or heating installation is dry.
The grinding of described step D completes on conventional ball mills.
The present invention has following advantages and effect: adopt such scheme, make crystalline particles, noncohesive phosphogypsum is under crystal modifier and appropriate moisture content effect, through stirring, pelletizing, steam pressure, grinding, especially the gypsum recrystallization in pellet can be made to generate the ɑ-semi-hydrated gypsum of 80 more than wt%, become the raw material of special manufacture light block, and under whipping agent effect, foaming in a mold, light block is obtained after natural curing, utilize to maximum the great building light-weight building block of phosphogypsum production and application amount, this Ardealite block is canescence, density, apparent size, strength grade all reaches national building materials industry JC/T698-2010 standard, ultimate compression strength can reach 3.5 MPas/M
3, quality is only 0.8 ton/M
3.Simultaneously reach energy-saving and emission-reduction because of unburned, again because of not waste discharge, waste residue, waste gas, and realize clean production, environment is had no adverse effects, there are more wide market outlook.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
A, carry out batch mixing by following mass ratio:
Phosphogypsum 99.9%
Citric acid 0.1%;
B, in the compound of steps A, add water to water content be 35 wt%, sends in conventional disk pelletizer, carry out conventional pelletizing, obtain pellet;
C, the pellet of step B is sent in conventional autoclave, 125 DEG C, under 0.16 MPa, steam pressure process 4 hours;
D, by the pellet of step C steam pressure process through conventional drier to water content (noncrystalline water)≤3 wt%, send in conventional ball mills, be ground to 100 objects and account for 60 more than wt% powders;
E, in step D gained dry mash, add the following whipping agent of 1 wt% of dry powder total mass: Sodium dodecylbenzene sulfonate (K12) 0.5%, ɑ-thiazolinyl sulfanilamide (SN) sodium (AOS) 0.5%, mixes, send in conventional forming mold, after shaping routinely, through conventional natural curing, obtain 0.8 ton/M
3, ultimate compression strength is 3.5 MPas/M
3light block.
Embodiment 2
A, carry out batch mixing by following mass ratio:
Phosphogypsum 99.8%
Dextrin is 0.1%
Gelatin 0.1%;
B, in the compound of steps A, add water to water content be 40 wt%, sends in conventional disk pelletizer, carry out conventional pelletizing, obtain ball material;
C, the ball material of step B is sent in conventional autoclave, 130 DEG C, under 0.13 MPa, steam pressure process 3 hours;
D, by the ball material of step C steam pressure process through conventional warm air drying to water content (noncrystalline water)≤3 wt%, send in conventional ball mills, be ground to 100 objects and account for 60 more than wt% powders;
E, in step D gained dry mash, add the following whipping agent of 1 wt% of dry powder total mass: ɑ-thiazolinyl sulfanilamide (SN) sodium (AOS) 0.2%, SH-126 compound water chestnut hairdressing infusion 0.3%, XH-05 whipping agent 0.3%, ADC are 0.2%, mix, send in conventional forming mold, after shaping routinely, through conventional natural curing, obtain 0.8 ton/M
3, ultimate compression strength is 3.5 MPas/M
3light block.
Embodiment 3
A, carry out batch mixing by following mass ratio:
Phosphogypsum 99.7%
Citric acid 0.1%
OP-10 0.1%
Glycerol monostearate 0.1%;
B, in the compound of steps A, add water to water content be 30 wt%, sends in conventional disk pelletizer, carry out conventional pelletizing, obtain ball material;
C, the ball material of step B is sent in conventional autoclave, 120 DEG C, under 0.15 MPa, steam pressure process 4 hours;
D, the ball material of step C steam pressure process is dried to water content (noncrystalline water)≤3 wt% through normal reheating furnace, send in conventional ball mills, be ground to 100 objects and account for 60 more than wt% powders;
E, in step D gained dry mash, add the Sodium dodecylbenzene sulfonate (K12) of 1 wt% of dry powder total mass, mix, send in conventional forming mold, after shaping routinely, through conventional natural curing, obtain 0.8 ton/M
3, ultimate compression strength is 3.5 MPas/M
3light block.
Embodiment 4
A, carry out batch mixing by following mass ratio:
Phosphogypsum 99.6%
Citric acid 0.1%
Succinic acid 0.1%
ＥＤＴＡ 0.1%
Gelatin 0.05%
Sodium dodecylbenzene sulfonate 0.05%;
B, in the compound of steps A, add water to water content be 35 wt%, sends in conventional disk pelletizer, carry out conventional pelletizing, obtain ball material;
C, the ball material of step B is sent in conventional autoclave, 110 DEG C, under 0.14 MPa, steam pressure process 3.5 hours;
D, by the ball material of step C steam pressure process through conventional seasoning to water content (noncrystalline water)≤3 wt%, send in conventional ball mills, be ground to 100 objects and account for 60 more than wt% powders;
E, in step D gained dry mash, add the following whipping agent of 1 wt% of dry powder total mass: polyoxyethylenated alcohol sodium sulfate (AES) 0.2%, ɑ-thiazolinyl sulfanilamide (SN) sodium (AOS) 0.2%, SH-126 compound water chestnut hairdressing infusion 0.2%, XH-05 whipping agent 0.2%, ADC whipping agent 0.2%, mix, send in conventional forming mold, after shaping routinely, through conventional natural curing, obtain 0.8 ton/M
3, ultimate compression strength is 3.5 MPas/M
3light block.
Claims (5)
1. a method for phosphogypsum recrystallization foam production light block, is characterized in that through the following step:
A, carry out batch mixing by following mass ratio:
Phosphogypsum 99.6 ~ 99.9%
Crystal modifier 0.1 ~ 0.4%,
Described crystal modifier is: the one in citric acid, succinic acid, EDTA, dextrin, gelatin, Sodium dodecylbenzene sulfonate, OP-10, glycerol monostearate or several arbitrarily;
B, in the compound of steps A, add water to water content be 30 ~ 40 wt%, carries out pelletizing routinely;
C, the pellet of step B is sent in autoclave, 110 ~ 140 DEG C, under 0.13 ~ 0.16 MPa, steam pressure process 3 ~ 5 hours, completes the recrystallization of phosphogypsum;
D, the pellet of step C is dried to water content≤3 wt% through routine, is ground to 100 objects through routine and accounts for 60 more than wt% powders;
E, in step D gained dry mash, add the whipping agent of 1 wt% of dry powder total mass, mix, send in forming mould, after shaping routinely, obtain light block, wherein whipping agent is: the one or several arbitrarily in Sodium dodecylbenzene sulfonate, polyoxyethylenated alcohol sodium sulfate, ɑ-thiazolinyl sulfanilamide (SN) sodium, SH-126 compound water chestnut hairdressing infusion, XH-05 whipping agent, ADC whipping agent.
2. the method for claim 1, is characterized in that the pelletizing of described step B is on conventional disk pelletizer, makes pellet routinely.
3. the method for claim 1, is characterized in that the autoclave of described step C, the mould of step e is conventional equipment.
4. the method for claim 1, is characterized in that the drying of described step D is conventional seasoning, or warm air drying, or heating installation is dry.
5. the method for claim 1, is characterized in that the grinding of described step D completes on conventional ball mills.
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| CN201310441079.7A CN103496935B (en) | 2013-09-25 | 2013-09-25 | The method of phosphogypsum recrystallization foam production light block |
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| CN201310441079.7A CN103496935B (en) | 2013-09-25 | 2013-09-25 | The method of phosphogypsum recrystallization foam production light block |
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| CN103496935B true CN103496935B (en) | 2015-09-09 |
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| CN105439489A (en) * | 2015-11-18 | 2016-03-30 | 西北矿冶研究院 | Foaming agent for mining filling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1800070A (en) * | 2006-01-10 | 2006-07-12 | 南京一夫建材实业有限公司 | Alpha type high-strength gypsum and its preparation method |
| CN102603219A (en) * | 2012-03-16 | 2012-07-25 | 武汉理工大学 | Process for preparing high-activity semi-hydrated gypsum cementing material and gypsum product by aid of phosphorous gypsum |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1800070A (en) * | 2006-01-10 | 2006-07-12 | 南京一夫建材实业有限公司 | Alpha type high-strength gypsum and its preparation method |
| CN102603219A (en) * | 2012-03-16 | 2012-07-25 | 武汉理工大学 | Process for preparing high-activity semi-hydrated gypsum cementing material and gypsum product by aid of phosphorous gypsum |
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