CN103408052A - Decomposition method of ardealite - Google Patents
Decomposition method of ardealite Download PDFInfo
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- CN103408052A CN103408052A CN2013103156286A CN201310315628A CN103408052A CN 103408052 A CN103408052 A CN 103408052A CN 2013103156286 A CN2013103156286 A CN 2013103156286A CN 201310315628 A CN201310315628 A CN 201310315628A CN 103408052 A CN103408052 A CN 103408052A
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- phosphogypsum
- ardealite
- gas
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- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000012266 salt solution Substances 0.000 claims abstract description 4
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 69
- 239000000843 powder Substances 0.000 claims description 15
- JNVCSEDACVAATK-UHFFFAOYSA-L [Ca+2].[S-]SSS[S-] Chemical compound [Ca+2].[S-]SSS[S-] JNVCSEDACVAATK-UHFFFAOYSA-L 0.000 claims description 10
- 229940051851 sulfurated lime Drugs 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000007605 air drying Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 6
- 238000013467 fragmentation Methods 0.000 claims description 6
- 238000006062 fragmentation reaction Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000004568 cement Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 3
- 239000001117 sulphuric acid Substances 0.000 abstract description 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 16
- 239000000292 calcium oxide Substances 0.000 description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000005864 Sulphur Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 235000011837 pasties Nutrition 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000255964 Pieridae Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229940056932 lead sulfide Drugs 0.000 description 1
- 229910052981 lead sulfide Inorganic materials 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- Catalysts (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a decomposition method of ardealite, which belongs to the technical field of phosphorus chemical treatment. According to the method, in the process of the production of sulphuric acid and the co-production of cement clinker from ardealite, CO gas is used as a reducer, and the ardealite is dipped in a ferric salt solution; Fe element is used as a catalyst to lower the decomposition temperature of the ardealite to be 600-650 DEG C; therefore, the energy consumption and the production cost are greatly lowered, meanwhile, the productivity of CaO is improved, the production of CaS is inhibited, and raw materials of SO2 gas for preparing sulfuric acid, and CaO for producing cement are obtained.
Description
Technical field
The present invention relates to a kind of decomposition method of phosphogypsum, belong to the phosphorous chemical industry processing technology field.
Background technology
Phosphoric acid is as a kind of important intermediates, be widely used in chemical fertilizer, glass, pottery, weaving, the industries such as food, along with developing of phosphorus chemical industry, developing rapidly along with high concentration phosphorus composite fertilizer industry particularly, the byproduct phosphogypsum of Wet Processes of Phosphoric Acid produces in a large number and stores up as a kind of industrial residue, in May, 2006, by phosphogypsum qualitative be Hazardous wastes, storing up in a large number of phosphogypsum not only needs to expend a large amount of manpowers, material resources and financial resources, and environment is had to larger potential hazard, although the resource utilization approach of phosphogypsum is a lot, but due to China's plaster of paris aboundresources, the resource technology development of phosphogypsum relatively lags behind, the comprehensive utilization ratio of phosphogypsum is not high, in the face of current phosphogypsum is stored up the massive losses economically that brings and the immense pressure of Environment Protection Policy in a large number, can the extensive recycling that realize phosphogypsum have become the key that can whole industry realize sustainable development.
Sulfuric acid is as a kind of important industrial chemicals, it is the raw material production that combines with sulphur, sulfurous iron ore and coloured smoke, but China's sulphur relative inadequacy of resources, external interdependency is too high, in phosphogypsum, containing a large amount of element sulphurs, is the potential sulphur resource of a kind of very tool, and decomposing ardealite producing sulfuric acid and jointly cement technology processed is ripe day by day, not only can consume on a large scale phosphogypsum to alleviate the pressure of Phosphate Fertilizer Industry, and its sulfuric acid product can be back to phosphoric acid production.
Although decomposing ardealite producing sulfuric acid and jointly cement technology processed can be realized the Sustainable development of phosphatic fertilizer company, but not yet can promote on a large scale up to now, one of them important reason is exactly that the decomposition temperature of phosphogypsum is high, energy consumption is large, direct economic benefit is not obvious, therefore, how to reduce ardealite decomposition temperature and become the important research direction.
Patent application CN101357773 discloses a kind of method that reduces ardealite decomposition temperature, respectively by gaseous reducing agent CO, H
2S, Gu the powder such as solid reductant flyash, coal gangue and gas-solid, solid-complex reducing agent add decomposing ardealite as admixture, control two atmosphere reactions, to reach, reduce ardealite decomposition temperature and guarantee high rate of decomposition and desulfurization degree, make ardealite decomposition temperature≤1000 ℃, rate of decomposition>=95%, the stable SO that reclaims
2Resource.
Patent application CN101462699 discloses a kind of method of decomposing phosphogypsum by high-sulphur coal catalytic reduction, in phosphogypsum reduction decomposition process, with high sulphur coal, make reductive agent, add catalyzer the decomposition temperature of phosphogypsum can be reduced to 800-1050 ℃, reduce ardealite decomposition temperature 100-200 ℃, reach energy-saving and cost-reducing purpose, simultaneously, the CaO generated can be used as the raw material of producing high grade cement, and the SO generated
2Can be used as raw gas of sulfuric acid processed.
Patent of invention CN1775660A discloses a kind of production method of utilizing the phosphogypsum slag extracting sulfuric acid, phosphogypsum and coal are mixed to join to decomposing furnace by weight the ratio of 1:0.15-1:0.35,800 ℃ of-1200 ℃ of lower roastings, make CaS and obtain H through replacement(metathesis)reaction
2S, then absorb and obtain the plumbous oxide product with plumbous oxide, then the roasting of gained lead sulfide is made to SO
2For gas washing in SA production.
Patent of invention CN1724338A discloses a kind ofly take phosphogypsum and is the method for raw material production industrial sulphuric acid, and the reduction carbon that the method is phosphogypsum 20% by phosphogypsum and quality is mixed to join in the fluidizing furnace of 1000 ℃-1100 ℃ and calcines, and obtains containing SO
2Furnace gas, through dedusting, cooling, double conversion double absorption technique compound probability sulfuric acid.
At present, the report of seeing take phosphogypsum as the patent of waste sulfuric acid adopts the solid reductant coal more, exist and mix inhomogeneously, be prone to reaction dead angle consumption large, and temperature of reaction is higher, how 1000 ℃ and more than, energy consumption and cost are higher.
Summary of the invention
The object of the present invention is to provide a kind of decomposition method of phosphogypsum, the method be take CO and is reducing gas, coordinates the use of Fe series catalysts, the decomposition temperature of phosphogypsum is reduced, reduce energy consumption, improve simultaneously the rate of decomposition of phosphogypsum, the method realizes by following steps:
1, by phosphogypsum natural air drying, fragmentation, grinding, screening, obtaining granularity is 100-120 purpose phosphogypsum powder
2, the phosphogypsum powder just obtained in step (1) is immersed in the ferric salt solution that concentration is 0.1mol/L-1.0mol/L, stirs 8-12h, takes out filter residue after filtering, at the temperature of 100 ℃-120 ℃, dry 1h-2h, after removing free water, obtain pretreated phosphogypsum;
3, by the temperature lower calcination 30min-60min of the phosphogypsum of pretreated phosphogypsum at 600 ℃-650 ℃, the gas flow rate of 10ml/min-15ml/min of take simultaneously passes into purity and is the CO gas more than 90%, in reaction process, collect tail gas, treat rate of decomposition and the sulfurated lime content of apparatus cools taking-up residue analysis phosphogypsum.
Phosphogypsum raw material of the present invention is produced solid waste by Wet Processes of Phosphoric Acid, and its main component is as shown in table 1;
Table 1: the mass percent of phosphogypsum raw material main ingredient
Adopt the CO reducing and decomposing phosphogypsum, primary product is CaO and SO
2, reaction mechanism is as follows:
CaSO
4(s) + CO(g) = CaO(s) + SO
2(g) + CO
2(g) (1)
CaSO
4(s) + 4CO(g) = CaS(s) + 4CO
2(g) (2)
CaO(s)+ SiO
2(g) = CaSiO
3(s) (3)
CaSO
4(s) + 3CaS(s)= CaO (s)+ 4S(s) (4)
2CaS(s) +SO
2(g) = 2CaO(s) + 3S(s) (5)
Due to the phosphogypsum complicated component, the decomposition reaction mechanism complexity, thermal decomposition process has that caloric receptivity is large, decomposition temperature is high, require the characteristics such as weak reducing atmosphere, the decomposition that the introducing of trivalent iron salt can be phosphogypsum provides a new response path, reduce the activation energy of reaction, thereby greatly reduce the decomposition reaction temperature, reduce energy consumption.
Beneficial effect of the present invention:
(1) technique of the present invention is simple, and phosphogypsum and catalyst mix are even, and ardealite decomposition temperature is 600 ℃-650 ℃, has reduced energy consumption, and production cost is greatly reduced;
(2) the decomposing ardealite rate after the ferric salt solution dipping can have higher CaO transformation efficiency simultaneously up to 99%, and effectively suppresses the generation of CaS, when processing dangerous solid waste phosphogypsum, has obtained the SO that can be used for preparing sulfuric acid
2The raw materials of Ca O of gas and production cement, the production cost of reduction phosphogypsum producing sulfuric acid and jointly cement processed;
(3) the Fe element is common transition element, cheap and easy to get, and consumption is few, and the efficient catalytic effect is not only played in the introducing of Fe element, reduce ardealite decomposition temperature, and consumption is few, and the final product of decomposition can be directly as high quality cement clinker.
Embodiment
Below in conjunction with embodiment, the present invention is done further full and clearly, but protection domain of the present invention is not limited to described content.
Embodiment 1
(1) by phosphogypsum natural air drying, fragmentation, grinding, cross 100 mesh sieves, obtaining granularity is 100 purpose phosphogypsum powder, and 50g phosphogypsum powder be impregnated in to 0.1mol/L FeCl
3In solution, when the phosphogypsum powder is that pasty state gets final product, magnetic agitation 12h, get filter residue after filtration, be placed in the baking oven of 120 ℃, and dry 1h, after removing free water, obtains pretreated phosphogypsum;
(2) get pretreated phosphogypsum 20g under 600 ℃, calcining 60min, the gas flow rate of 10ml/min of take simultaneously pass into the CO gas of purity as 99%, and with flue gas analyzing apparatus Real-Time Monitoring SO
2Concentration, after question response completes, naturally cool to room temperature, with S in the iodometric determination residue
2-Then content calculate the calcium sulfate in residue, the amount of sulfurated lime according to stoichiometry, according to following calculation formula:
Calculating by analysis the decomposing ardealite rate is 94.5%, and in residue, sulfurated lime content is 50.2%, and calcium oxide content is 19.3%.
Embodiment 2
(1) by phosphogypsum natural air drying, fragmentation, grinding, cross 110 mesh sieves, obtaining granularity is 110 purpose phosphogypsum powder, and 50g phosphogypsum powder be impregnated in to 1.0 mol/L Fe
2(SO
4)
3In solution, when the phosphogypsum powder is that pasty state gets final product, magnetic agitation 10h, get filter residue after filtration, be placed in the baking oven of 110 ℃, and dry 1.5h, after removing free water, obtains pretreated phosphogypsum;
(2) get pretreated phosphogypsum 25g under 620 ℃, calcining 45min, the gas flow rate of 13ml/min of take simultaneously pass into the CO gas of purity as 99.9%, and with flue gas analyzing apparatus Real-Time Monitoring SO
2Concentration, after question response completes, naturally cool to room temperature, with S in the iodometric determination residue
2-Then content calculate the calcium sulfate in residue, the amount of sulfurated lime according to stoichiometry, according to following calculation formula:
Calculating by analysis the decomposing ardealite rate is 99.1%, and in residue, sulfurated lime content is 42.1%, and calcium oxide content is 25.8%.
Embodiment 3
(1) by phosphogypsum natural air drying, fragmentation, grinding, cross 120 mesh sieves, obtaining granularity is 120 purpose phosphogypsum powder, and 50g phosphogypsum powder be impregnated in to 0.3mol/L Fe (NO
3)
3In solution, when the phosphogypsum powder is that pasty state can stop, magnetic agitation 8h, get filter residue after filtration, be placed in the baking oven of 100 ℃, and dry 2h, after removing free water, obtains pretreated phosphogypsum;
(2) get pretreated phosphogypsum 21g under 650 ℃, calcining 30min, the gas flow rate of 15ml/min of take simultaneously pass into the CO gas of purity as 90%, and with flue gas analyzing apparatus Real-Time Monitoring SO
2Concentration, after question response completes, naturally cool to room temperature, with S in the iodometric determination residue
2-Then content calculate the calcium sulfate in residue, the amount of sulfurated lime according to stoichiometry, according to following calculation formula:
Calculating by analysis the decomposing ardealite rate is 97%, and in residue, sulfurated lime content is 47.1%, and calcium oxide content is 20.5%.
Embodiment 4 (simultaneous test)
(1) by phosphogypsum phosphorus natural air drying, fragmentation, grinding, cross the accurate mole sieve of 100 targets, obtaining granularity is 100 purpose phosphogypsum powder, is placed in the dry 1h of baking oven of 120 ℃, except free water;
(2) get phosphogypsum 25g under 900 ℃, calcining 45min, the gas flow rate of 12ml/min of take simultaneously pass into the CO gas of purity as 99%, and with flue gas analyzing apparatus Real-Time Monitoring SO
2Concentration, after question response completes, naturally cool to room temperature, with S in the iodometric determination residue
2-Then content calculate the calcium sulfate in residue, the amount of sulfurated lime according to stoichiometry, according to following calculation formula:
Calculating by analysis the decomposing ardealite rate is 90%, and in residue, sulfurated lime content is 52.5%, and calcium oxide content is 6.8%.
Claims (1)
1. the decomposition method of a phosphogypsum is characterized in that through following steps:
(1) by phosphogypsum natural air drying, fragmentation, grinding, screening, obtaining granularity is 100-120 purpose phosphogypsum powder;
(2) the phosphogypsum powder just obtained in step (1) is immersed in the ferric salt solution that concentration is 0.1mol/L-1.0mol/L, stirs 8h-12h, takes out filter residue after filtering, at the temperature of 100 ℃-120 ℃, dry 1h-2h, after removing free water, obtain pretreated phosphogypsum;
(3) by the temperature lower calcination 30min-60min of the phosphogypsum of pretreated phosphogypsum at 600 ℃-650 ℃, the gas flow rate of 10ml/min-15ml/min of take simultaneously passes into purity and is the CO gas more than 90%, in reaction process, collect tail gas, treat rate of decomposition and the sulfurated lime content of apparatus cools taking-up residue analysis phosphogypsum.
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| CN103408052B CN103408052B (en) | 2016-01-13 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864023A (en) * | 2014-03-11 | 2014-06-18 | 昆明理工大学 | Method for reducing and decomposing ardealite by using ardealite carbonatation tail gas |
| CN104724678A (en) * | 2015-02-27 | 2015-06-24 | 四川大学 | Method for fluidized catalytic decomposition of gypsum |
| CN109573956A (en) * | 2018-12-18 | 2019-04-05 | 武汉科技大学 | A kind of utilization method of waste tire powder |
| CN112191240A (en) * | 2020-09-16 | 2021-01-08 | 福泉环保城发展有限公司 | Industrial phosphogypsum waste treatment method |
| CN113976099A (en) * | 2021-11-23 | 2022-01-28 | 山东交通学院 | Calcium oxide-loaded porous alkaline carbon material with magnetic performance, and preparation method and application thereof |
| CN114229877A (en) * | 2022-01-04 | 2022-03-25 | 西南科技大学 | Method for decomposing phosphogypsum at low temperature |
| WO2022237528A1 (en) * | 2021-05-10 | 2022-11-17 | 山东大学 | Quicklime preparation process and system based on carbon emission reduction |
| CN115677241A (en) * | 2022-11-11 | 2023-02-03 | 宜都兴发化工有限公司 | Method for decomposing molten liquid and solid phase by phosphogypsum multistage method |
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| CN1203833A (en) * | 1998-05-06 | 1999-01-06 | 中国科学院生态环境研究中心 | Method for reduction of desulfurized waste residue, phosphogypsum or natural gypsum |
| CN1775660A (en) * | 2005-11-18 | 2006-05-24 | 四川省犍为明丰化工有限公司 | Method for producing sulfuric acid utilizing phosphogypsum slag |
| CN101357773A (en) * | 2008-09-12 | 2009-02-04 | 昆明理工大学 | Method for reducing ardealite decomposition temperature |
-
2013
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|---|---|---|---|---|
| CN1203833A (en) * | 1998-05-06 | 1999-01-06 | 中国科学院生态环境研究中心 | Method for reduction of desulfurized waste residue, phosphogypsum or natural gypsum |
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| CN101357773A (en) * | 2008-09-12 | 2009-02-04 | 昆明理工大学 | Method for reducing ardealite decomposition temperature |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864023B (en) * | 2014-03-11 | 2016-08-24 | 昆明理工大学 | A kind of method of ardealite carbonating tail gas reducing and decomposing phosphogypsum |
| CN103864023A (en) * | 2014-03-11 | 2014-06-18 | 昆明理工大学 | Method for reducing and decomposing ardealite by using ardealite carbonatation tail gas |
| CN104724678A (en) * | 2015-02-27 | 2015-06-24 | 四川大学 | Method for fluidized catalytic decomposition of gypsum |
| CN104724678B (en) * | 2015-02-27 | 2018-07-06 | 四川大学 | A kind of method of fluid catalytic decomposing gypsum |
| CN109573956B (en) * | 2018-12-18 | 2022-04-26 | 武汉科技大学 | Method for utilizing waste tire powder |
| CN109573956A (en) * | 2018-12-18 | 2019-04-05 | 武汉科技大学 | A kind of utilization method of waste tire powder |
| CN112191240A (en) * | 2020-09-16 | 2021-01-08 | 福泉环保城发展有限公司 | Industrial phosphogypsum waste treatment method |
| CN112191240B (en) * | 2020-09-16 | 2023-02-10 | 福泉环保城发展有限公司 | Industrial phosphogypsum waste treatment method |
| WO2022237528A1 (en) * | 2021-05-10 | 2022-11-17 | 山东大学 | Quicklime preparation process and system based on carbon emission reduction |
| CN113976099A (en) * | 2021-11-23 | 2022-01-28 | 山东交通学院 | Calcium oxide-loaded porous alkaline carbon material with magnetic performance, and preparation method and application thereof |
| CN113976099B (en) * | 2021-11-23 | 2023-06-27 | 山东交通学院 | Magnetic porous alkaline carbon material loaded with calcium oxide, preparation method and application thereof |
| CN114229877A (en) * | 2022-01-04 | 2022-03-25 | 西南科技大学 | Method for decomposing phosphogypsum at low temperature |
| CN115677241A (en) * | 2022-11-11 | 2023-02-03 | 宜都兴发化工有限公司 | Method for decomposing molten liquid and solid phase by phosphogypsum multistage method |
| CN115677241B (en) * | 2022-11-11 | 2024-04-19 | 宜都兴发化工有限公司 | Phosphogypsum multistage method melt solid-phase decomposition method |
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