CN114739869B - Method for rapidly detecting content of calcium sulfate hemihydrate in modified industrial byproduct gypsum - Google Patents
Method for rapidly detecting content of calcium sulfate hemihydrate in modified industrial byproduct gypsum Download PDFInfo
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- 239000010440 gypsum Substances 0.000 title claims abstract description 84
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 84
- 239000006227 byproduct Substances 0.000 title claims abstract description 57
- 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 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 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 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000002715 modification method Methods 0.000 claims description 2
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 claims description 2
- 235000013923 monosodium glutamate Nutrition 0.000 claims description 2
- 239000004223 monosodium glutamate Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000004458 analytical method Methods 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000012086 standard solution Substances 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000004448 titration Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000000705 flame atomic absorption spectrometry Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/12—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by measuring rising or falling speed of the body; by measuring penetration of wedged gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
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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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Abstract
The invention discloses a method for rapidly detecting the content of calcium sulfate hemihydrate in modified industrial byproduct gypsum, which utilizes the close relationship between the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum and the initial setting time to obtain a relational expression between the initial setting time and the content of calcium sulfate hemihydrate through data fitting, and then rapidly obtains the content of calcium sulfate hemihydrate by detecting the initial setting time of a sample to be detected. The invention does not need sample pretreatment and standard solution and related chemical reagents, only carries out simple water-adding solidification analysis initial setting time on the sample, and reduces the possibility of sample loss or pollution due to the simplification of sample treatment steps. The method not only can simplify the operation flow, has low input cost, but also greatly shortens the test time, enables the detection result to be given out in time, effectively solves the problem of real-time monitoring of the calcium sulfate hemihydrate content in the gypsum byproduct in the current modified industry, has high popularization and application value and has good application prospect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a method for rapidly detecting the content of calcium sulfate hemihydrate in modified industrial byproduct gypsum.
Background
Gypsum is a "green" material and has found wide application in the construction and other industries. The gypsum has low energy consumption and little environmental pollution in the production process, and can be recycled, so that the gypsum industry has good development prospect. In particular, the byproduct gypsum, namely industrial byproduct gypsum, which is discharged in a large amount in the current industrial production processes of electric power, chemical industry and the like is a byproduct of some industrial production processes, and the industrial byproduct gypsum has various types, such as desulfurization gypsum generated by flue gas desulfurization of coal-fired power plants, phosphogypsum generated by phosphate fertilizers, ceramic mould gypsum generated by ceramic factories and titanium gypsum, lemon gypsum and the like generated by other chemical factories. At present, the accumulated and stored quantity of the byproduct gypsum in the industry in China is more than 3 hundred million tons. The industrial byproduct gypsum is very low in recycling utilization amount, is mostly piled up on site, occupies land, wastes resources, contains acid and other harmful substances which are easy to pollute the surrounding environment, brings serious problems of safety and ecological environment pollution, and becomes an important factor for restricting sustainable development of the phosphorus chemical industry in China. Therefore, it is highly demanded to promote the comprehensive utilization of industrial solid waste, and the development and utilization level of industrial by-product gypsum are improved, and the comprehensive utilization amount of industrial by-product gypsum is improved to 50% by 2020. Therefore, the comprehensive utilization task of the industrial byproduct gypsum is very difficult, the development of key commonality technologies is enhanced, and the establishment of a batch of industrial demonstration projects of large-scale and high-added-value utilization becomes a key task of the comprehensive utilization of the industrial byproduct gypsum in the future.
Industrial by-product gypsum such as phosphogypsum, titanium gypsum and the like is an air hardening cementing material which is difficult to directly use, so that the industrial by-product gypsum must be pretreated before comprehensive utilization. The current treatment mode mainly comprises high-temperature calcination modification and vacuum high-pressure modification, and the modification is carried out to obtain semi-hydrated gypsum (wherein calcium sulfate is beta-CaSO 4·1/2H2 O), and the hydraulic gelation property of the semi-hydrated gypsum is utilized to prepare various building material products by recycling, so that the method is widely applied to the building material industry. The key index for measuring the quality of the modified industrial byproduct gypsum (semi-hydrated gypsum) is the content of beta-calcium sulfate hemihydrate, the content of beta-calcium sulfate hemihydrate in the semi-hydrated gypsum is generally above 60%, wherein the higher the content of beta-calcium sulfate hemihydrate is, the better the performance of the semi-hydrated gypsum is. Therefore, the detection of the beta calcium sulfate hemihydrate content of the semi-hydrated gypsum manufacturers and products before entering the factories is a necessary detection item, but the conventional detection method of the current calcium sulfate hemihydrate content is as follows: EDTA chemical titration method and flame atomic absorption spectrometry, the above-mentioned method all need to dispose complicated flows such as standard solution and relevant chemical reagent preliminary treatment, and flame atomic absorption spectrometry test cost is more expensive, so many modified gypsum enterprises are difficult to monitor the beta calcium sulfate hemihydrate content in the industrial by-product gypsum after producing the modification in real time at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problems that: how to provide a method for rapidly detecting the content of calcium sulfate hemihydrate in modified industrial byproduct gypsum, and solve the problems that the existing method for detecting calcium sulfate hemihydrate has complex operation, high cost, long detection time, incapability of realizing real-time monitoring and the like.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for rapidly detecting the content of calcium sulfate hemihydrate in modified industrial byproduct gypsum comprises the following steps:
S1: respectively placing different standard samples of the modified industrial byproduct gypsum and water into a cement paste mixer, uniformly stirring, transferring the standard samples into a setting time mould, trowelling to obtain a horizontal surface, placing a Vicat test needle on the horizontal surface, and detecting and recording the time when the Vicat test needle vertically falls into the horizontal surface about 5mm away from a bottom plate of the mould, namely the initial setting time of the modified industrial byproduct gypsum; the standard sample of the modified industrial byproduct gypsum contains gradient-content calcium sulfate hemihydrate;
S2: the initial setting time obtained in the step S1 and the corresponding content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum are simultaneously imported into data analysis software for drawing, and a standard curve equation of the correlation between the initial setting time T and the content V (in mass percent) of the calcium sulfate hemihydrate is established; the unit of T is min, and the unit of V is min;
S3: detecting initial setting time of a modified industrial byproduct gypsum sample to be detected according to the method of the step S1, and then bringing the initial setting time into a standard curve equation obtained in the step S2, thereby calculating to obtain the content of calcium sulfate hemihydrate in the sample to be detected; the calcium sulfate hemihydrate is beta calcium sulfate hemihydrate (beta-CaSO 4·1/2H2 O).
Preferably, the mass ratio of the modified industrial byproduct gypsum to the water is 9-12:8-11.
Preferably, the industrial byproduct gypsum is one or more of desulfurized gypsum, phosphogypsum, citric acid gypsum, fluorgypsum, salt gypsum, monosodium glutamate gypsum, copper gypsum and titanium gypsum.
Preferably, the modification method is one or more of calcination, vacuum high pressure and chemical method.
Preferably, the stirring time is 3 to 5 seconds, and the stirring speed is 60 to 180r/min.
Preferably, the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum is more than 70%.
Preferably, the data analysis software is one or more of Excel, matlab or Origin.
Preferably, when the initial setting time T is greater than 7min, the standard curve equation is v=0.06T 2 -1.72t+91.43; when the initial setting time is less than/equal to 7min, the standard curve equation is V= -1.15T+91.03, wherein T is the initial setting time in min, and V is the calcium sulfate hemihydrate content in%.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention utilizes the close relation between the content of calcium sulfate hemihydrate and the initial setting time in the modified industrial byproduct gypsum, obtains the relational expression between the initial setting time and the content of calcium sulfate hemihydrate through data fitting, and then can rapidly obtain the content of calcium sulfate hemihydrate by detecting the initial setting time of a sample to be detected. The method does not need sample pretreatment and standard solution and related chemical reagents, and only carries out simple water-adding solidification analysis on the sample for initial setting time. The invention effectively solves the problem of real-time monitoring of the content of the calcium sulfate hemihydrate in the current modified industrial byproduct gypsum and quality control thereof, greatly shortens the measuring program and time of enterprises on the content of the calcium sulfate hemihydrate in the industrial byproduct gypsum, and has good application prospect.
2. The method for measuring the content of the calcium sulfate hemihydrate in the modified industrial byproduct gypsum not only can simplify the test and analysis flow, has low input cost, but also greatly shortens the test time, so that the detection result can be given out immediately, and compared with the traditional chemical titration method, the method provided by the invention has the advantages that the average value of relative errors is not more than 0.37%, and the variance of the relative errors is 4.92% at maximum, so that the result is objective and accurate, the method has the effectiveness and feasibility, the content of the calcium sulfate hemihydrate in the modified industrial byproduct gypsum can be rapidly measured, and the popularization and application value is high.
Drawings
FIG. 1 is a plot of a standard curve fitted at an initial set time greater than 7 minutes.
FIG. 2 is a graph of a quadratic standard fitted with an initial set time greater than 7 min.
FIG. 3 is a graph of a primary standard curve fitted when the initial setting time is less than/equal to 7min
FIG. 4 is a graph of a quadratic standard fitted with an initial set time of less than/equal to 7 min.
Detailed Description
The present invention will be described in further detail with reference to examples. The calcium sulfate hemihydrate described in the examples below are all referred to as beta calcium sulfate hemihydrate.
Method for rapidly detecting content of calcium sulfate hemihydrate in modified industrial byproduct gypsum
1) Respectively placing 550g of different standard samples of modified industrial byproduct gypsum and 450g of water into a cement paste mixer, stirring for 3s at the speed of 80r/min, transferring the standard samples into a setting time mould, trowelling the standard samples to obtain a horizontal surface, placing a Vicat test needle on the horizontal surface, and detecting and recording the time when the Vicat test needle vertically falls into the horizontal surface about 5mm away from a bottom plate of the mould, namely the initial setting time of the modified industrial byproduct gypsum; in order to improve the accuracy of fitting data and combine practical production experience, the initial setting time is respectively counted to be more than 7min and less than/equal to 7min, wherein the content of calcium sulfate hemihydrate in the standard sample of the modified industrial byproduct gypsum and the corresponding initial setting time are specifically shown in tables 1 and 2.
TABLE 1
TABLE 2
| Semi-hydrated gypsum content/% | Coagulation time/min |
| 82.7 | 7 |
| 84.3 | 6.4 |
| 84.6 | 5.3 |
| 86.6 | 3.8 |
| 86.3 | 4.2 |
| 82.9 | 6.9 |
| 84.4 | 6.1 |
| 85.1 | 5.8 |
| 86.9 | 3.6 |
| 83.3 | 6.5 |
| 85.4 | 4.8 |
| 83.9 | 6.6 |
| 86.2 | 4.1 |
| 84.1 | 5.9 |
| 82.7 | 6.8 |
2) The calcium sulfate hemihydrate content in the modified industrial byproduct gypsum obtained in the step 1) and the corresponding initial setting time are simultaneously imported into data analysis software Excel, origin and Matlab for drawing, a calibration curve of the correlation between the initial setting time T and the calcium sulfate hemihydrate content V is established, and fitting is generally carried out by adopting a primary curve or a secondary curve; the unit of T is min, and the unit of V is min; fitting is carried out by taking initial setting time as an abscissa and the content of calcium sulfate hemihydrate as an ordinate in a coordinate system.
The primary curve equation is V=a 1T+b1 (1), and a primary term coefficient a 1 and a constant term coefficient b 1 in the equation are calculated according to the content of calcium sulfate hemihydrate in each standard sample and the initial setting time;
the quadratic curve equation is V=a 2T2+b2 x+c (2), and the quadratic term coefficient a 2, the first order term coefficient b 2 and the constant term coefficient c in the equation are calculated according to the content of calcium sulfate hemihydrate in each standard sample and the initial setting time.
The data in Table 1 were introduced into the equations (1) and (2), respectively, to obtain a first order curve equation of V= -0.43T+85.00
(3) ; The conic equation is v=0.06T 2 -1.72t+91.43 (4).
The data in table 2 are respectively introduced into the formula (1) and the formula (2), and the first-order curve equation is v= -1.15t+91.03 (5); the conic equation is v= -0.11T 2 +0.06t +87.98 (6).
3) Taking a plurality of modified industrial byproduct gypsum as a sample to be detected, measuring initial setting time T (setting time is more than 7 min) according to the step 1), carrying the initial setting time T into the formula (3) and the formula (4), measuring the content V of beta calcium sulfate hemihydrate in the sample to be detected, and comparing the content V with the result of EDTA chemical titration, which is a conventional method for measuring the calcium sulfate hemihydrate, wherein the results are shown in the table 3 and the table 4 respectively.
TABLE 3 Table 3
TABLE 4 Table 4
Taking a plurality of modified industrial byproduct gypsum as a sample to be detected, measuring initial setting time T (setting time is not more than 7 min) according to the step 1), carrying the initial setting time T into the formula (5) and the formula (6), measuring the content V of beta calcium sulfate hemihydrate in the sample to be detected, and comparing the content V with the result of EDTA chemical titration, which is a conventional method for measuring the calcium sulfate hemihydrate, wherein the results are shown in tables 5 and 6 respectively.
TABLE 5
TABLE 6
From the above results, when the initial setting time T is greater than 7min, the standard curve equation adopts an equation of v= -0.43t+85.00, the relative error mean value is 0.358, and the variance is 10.03%; the standard curve equation adopts an equation of V=0.06T 2 -1.72T+91.43, the relative error is 0.305, and the variance is 3.15%. When the initial setting time is less than/equal to 7min, the standard curve equation adopts an equation of V= -1.15T+91.03, the relative error is 0.370, and the variance is 4.92%; the standard curve equation adopts an equation of V= -0.11T 2 +0.06T+87.98, the relative error is 0.665, and the variance is 17.63%. The results from two different fitting equations can be determined: when the initial setting time T is greater than 7min, the standard curve equation is V=0.06T 2 -1.72T+91.43; when the initial setting time is less than/equal to 7min, the standard curve equation is v= -1.15t+91.03. The relative mean error obtained by adopting the two equations is smaller, and the relative error variance is smaller, namely, the difference between the fitting value of the equations and the result measured by the chemical titration method is very small, the fitting is accurate, and the measured result is accurate and reliable.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The method for rapidly detecting the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum is characterized by comprising the following steps of:
S1: respectively placing different standard samples of the modified industrial byproduct gypsum and water into a cement paste mixer, uniformly stirring, moving the standard samples into a setting time mould, trowelling the standard samples to obtain a horizontal surface, placing a Vicat test needle on the horizontal surface, and detecting and recording the time when the Vicat test needle vertically falls into a position 5mm away from a bottom plate of the mould on the horizontal surface, namely the initial setting time of the modified industrial byproduct gypsum; the standard sample of the modified industrial byproduct gypsum contains gradient-content calcium sulfate hemihydrate;
S2: the initial setting time obtained in the step S1 and the corresponding content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum are simultaneously imported into data analysis software for drawing, a standard curve equation of the correlation between the initial setting time T and the content V of the calcium sulfate hemihydrate is established, and when the initial setting time T is greater than 7min, the standard curve equation is V=0.06T 2 -1.72 T+ 91.43; when the initial setting time is less than or equal to 7min, the standard curve equation is V= -1.15T+ 91.03, wherein T is the initial setting time in min, and V is the content of calcium sulfate hemihydrate in min;
S3: detecting initial setting time of a modified industrial byproduct gypsum sample to be detected according to the method of the step S1, and then bringing the initial setting time into a standard curve equation obtained in the step S2, thereby calculating to obtain the content of calcium sulfate hemihydrate in the sample to be detected; the calcium sulfate hemihydrate is beta calcium sulfate hemihydrate.
2. The method for rapidly detecting the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum according to claim 1, wherein the mass ratio of the modified industrial byproduct gypsum to water is 9-12:8-11.
3. The method for rapidly detecting the content of calcium sulfate hemihydrate in modified industrial byproduct gypsum according to claim 1, wherein the industrial byproduct gypsum is one or more of desulfurized gypsum, phosphogypsum, citric acid gypsum, fluorgypsum, salt gypsum, monosodium glutamate gypsum, copper gypsum and titanium gypsum.
4. The method for rapidly detecting the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum according to claim 1, wherein the modification method is one or more of calcination, vacuum high pressure and chemical method.
5. The method for rapidly detecting the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum according to claim 1, wherein the stirring time is 3-5 s, and the stirring speed is 60-180 r/min.
6. The method for rapidly detecting the content of calcium sulfate hemihydrate in the modified industrial byproduct gypsum according to claim 1, wherein the content of the calcium sulfate hemihydrate in the modified industrial byproduct gypsum is more than 70%.
7. The method for rapidly detecting the calcium sulfate hemihydrate content of the modified industrial byproduct gypsum according to claim 1, wherein the data analysis software is one or more of Excel, matlab or Origin.
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