CN112033933A - Method for rapidly measuring solid content of liquid raw material of grinding aid - Google Patents
Method for rapidly measuring solid content of liquid raw material of grinding aid Download PDFInfo
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- CN112033933A CN112033933A CN202010940798.3A CN202010940798A CN112033933A CN 112033933 A CN112033933 A CN 112033933A CN 202010940798 A CN202010940798 A CN 202010940798A CN 112033933 A CN112033933 A CN 112033933A
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- 239000007787 solid Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002994 raw material Substances 0.000 title claims abstract description 33
- 238000000227 grinding Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 title claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 28
- 239000012086 standard solution Substances 0.000 claims description 21
- 238000010586 diagram Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000007865 diluting Methods 0.000 description 5
- -1 modified alcohol amine Chemical class 0.000 description 5
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 4
- 150000003152 propanolamines Chemical class 0.000 description 4
- 235000013379 molasses Nutrition 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010998 test method Methods 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
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- General Health & Medical Sciences (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a method for quickly and accurately measuring the solid content of a liquid raw material of a cement grinding aid, which utilizes an automatic Abbe refractometer to measure the refraction concentration of the liquid raw material of the cement grinding aid, thereby quickly measuring the solid content of the raw material of the cement grinding aid.
Description
Technical Field
The invention relates to the technical field of detection of raw materials of cement grinding aids, in particular to a method for quickly and accurately measuring the solid content of a liquid raw material of a cement grinding aid.
Background
The solid content is an important homogeneity index for warehousing inspection of raw materials of the cement grinding aid, and has important influence on the quality stability of the raw materials to be controlled. At present, the determination method generally adopted by cement grinding aid liquid raw material solid content has long determination time, complex operation and poor stability, and is not suitable for large-scale and multi-batch manufacturers to control product quality. Meanwhile, the solid content is an important homogeneity index of the cement grinding aid, the solid content of the liquid raw material has an important influence on the cement grinding aid, and the solid content index of the cement grinding aid is often adjusted by adding and subtracting materials for many times because the solid content of the liquid raw material is inaccurate to measure and brings large fluctuation to the solid content index of the cement grinding aid. This condition causes instability of the cement grinding aid product and also causes troubles in production, resulting in an increase in production time. Therefore, the method for quickly and accurately detecting the solid content of the liquid raw material of the cement grinding aid is beneficial to shortening the production time and stabilizing the product quality.
Disclosure of Invention
The invention aims to overcome the defects of long determination time, complex operation, poor stability and narrow application range in the prior art and provide a method for quickly and accurately measuring the solid content of a liquid raw material of a cement grinding aid.
The purpose of the invention is realized by the following technical scheme: a method for rapidly and accurately measuring the solid content of a liquid raw material of a cement grinding aid utilizes refraction concentration to rapidly measure the solid content of the raw material of the cement grinding aid, and comprises the following steps:
s1: determining the solid content of the liquid raw material of the cement grinding aid by adopting the existing specified method, and using the liquid raw material with the accurately measured solid content for subsequent preparation of each concentration gradient standard solution;
s2: preparing a plurality of gradient solid content standard solutions by using the liquid raw material sample with the accurately measured solid content in the step S1, and measuring the refractive concentration of the standard solutions by using an automatic Abbe refractometer under the condition of constant temperature;
s3: drawing a scatter diagram by taking the refractive concentration measured by an automatic Abbe refractometer as a vertical coordinate x and the solid content of the standard solution as a horizontal coordinate y, and performing linear fitting on the scatter diagram to obtain a standard curve between the solid content and the refractive concentration and a correlation coefficient R of the standard curve2Keeping the value greater than the specific value, and testing again until R is less than the specific value2Greater than a specified value;
s4: and in the step S2, under the condition of temperature, measuring the refraction concentration of the sample to be measured by using an automatic Abbe refractometer, and calculating the solid content of the sample to be measured according to the standard curve in the step S3.
The solid content of the liquid raw material in the step S1 is within the range of 5% -80%.
The constant temperature in step S2 was 20 ℃.
In step S2, the gradient solid content is in the range of 5% to 60%, and the gradient solid content interval is 1% to 5%, preferably 2.0%.
Correlation coefficient R of the standard curve in step S22A particular value of greater than 0.99.
The expression of the standard curve in step S2 is y = ax + b, where a and b are constants, a is the slope of the standard curve, and b is the intercept of the ordinate of the standard curve.
The technical parameters of the automatic Abbe refractometer in the steps S2-S4 are that the measuring range is 0-100%, the resolution is 0.01%, the indication error is-0.1% - +0.1%, and the power supply 198v-242v
The invention has the following advantages: the method has the advantages of high detection speed, high detection result accuracy and small error, solves the problems of poor stability and long production time of the produced cement grinding aid product caused by raw material detection errors, improves the production efficiency and reduces the production cost.
Drawings
FIG. 1 shows the results of tests performed in examples 1 to 5 of the present invention;
FIG. 2 is a comparison of test solids content and actual solids content for the method of example 1 of the present invention;
FIG. 3 is a comparison of the results of two measurements of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
Example 1:
a method for quickly and accurately measuring the solid content of modified alcohol amine comprises the following steps:
s1: weighing 3.0000-5.0000g of modified alcohol amine sample according to the method specified in GB/T8077, drying at 100-105 ℃ to constant weight, measuring the solid content, and using the solid content as a sample for preparing each concentration gradient standard solution;
s2: diluting the sample in the step S1 into a standard solution with the solid content of 12% -20%, wherein the concentration gradient interval is 2%;
s3: respectively measuring the refraction concentration of the sample by using an automatic Abbe refractometer at the temperature of 20 ℃, drawing a refraction concentration x-solid content y scatter diagram, and performing linear fitting on the scatter diagram to obtain a standard curve: y = ax + b, wherein a, b are constants; when R is2When the curve is more than 0.99, the curve can be used as a standard curve for calculating the solid content, and when the curve is less than 0.99, the curve is fitted until R2Greater than 0.99;
s4: and (4) measuring the refraction concentration of the sample to be measured by using an automatic Abbe refractometer, and calculating the solid content of the modified alcohol amine to be measured through the standard curve in the step S3.
Example 2:
a method for quickly and accurately measuring the solid content of modified propanolamine comprises the following steps:
s1: weighing 3.0000-5.0000g of modified propanolamine sample according to the method specified in GB/T8077, drying at 100-105 ℃ to constant weight, measuring the solid content of the modified propanolamine sample, and using the solid content as a sample for preparing each concentration gradient standard solution;
s2: diluting the sample in the step S1 into a standard solution with the solid content of 12% -20%, wherein the concentration gradient interval is 2%;
s3: respectively measuring the refraction concentration of the sample by using an automatic Abbe refractometer at the temperature of 20 ℃, drawing a refraction concentration x-solid content y scatter diagram, and performing linear fitting on the scatter diagram to obtain a standard curve: y = ax + b. Wherein a and b are constants; when R is2When the curve is more than 0.99, the curve can be used as a standard curve for calculating the solid content, and when the curve is less than 0.99, the curve is fitted until R2Greater than 0.99;
s4: and (4) measuring the refraction concentration of the sample to be measured by using an automatic Abbe refractometer, and calculating the solid content of the modified propanolamine to be measured through the standard curve in the step S3.
Example 3:
a method for quickly and accurately measuring solid content of triisopropanolamine comprises the following steps:
s1: weighing 3.0000-5.0000g of triisopropanolamine sample according to the method specified in GB/T8077, drying at 100-105 ℃ to constant weight, measuring the solid content of the triisopropanolamine sample, and using the solid content as a sample for preparing each concentration gradient standard solution;
s2: diluting the sample in the step S1 into a standard solution with the solid content of 12% -20%, wherein the concentration gradient interval is 2%;
s3: respectively measuring the refraction concentration of the sample by using an automatic Abbe refractometer at the temperature of 20 ℃, drawing a refraction concentration x-solid content y scatter diagram, and performing linear fitting on the scatter diagram to obtain a standard curve: y = ax + b; wherein a and b are constants, when R2When the curve is more than 0.99, the curve can be used as a standard curve for calculating the solid content, and when the curve is less than 0.99, the curve is fitted until R2Greater than 0.99;
s4: and (4) measuring the refraction concentration of the sample to be measured by using an automatic Abbe refractometer, and calculating the solid content of the triisopropanolamine to be measured through the standard curve in the step S3.
Example 4:
a method for quickly and accurately measuring the solid content of brine comprises the following steps:
s1: weighing 3.0000-5.0000g of saline sample according to the method specified in GB/T8077, drying at 100-105 ℃ to constant weight, measuring the solid content, and using the solid content as a sample for preparing standard solution with each concentration gradient;
s2: diluting the sample in the step S1 into a standard solution with the solid content of 12% -20%, wherein the concentration gradient interval is 2%;
s3: respectively measuring the refraction concentration of the sample by using an automatic Abbe refractometer at the temperature of 20 ℃, drawing a refraction concentration x-solid content y scatter diagram, and performing linear fitting on the scatter diagram to obtain a standard curve: y = ax + b; wherein a and b are constants; when R is2When the curve is more than 0.99, the curve can be used as a standard curve for calculating the solid content, and when the curve is less than 0.99, the curve is fitted until R2Greater than 0.99;
s4: and (4) measuring the refraction concentration of the sample to be measured by using an automatic Abbe refractometer, and calculating the solid content of the saline to be measured through the standard curve in the step S3.
Example 5:
a method for quickly and accurately measuring the solid content of molasses comprises the following steps:
s1: weighing 3.0000-5.0000g of molasses sample according to the method specified in GB/T8077, drying at 100-105 ℃ to constant weight, measuring the solid content, and using the solid content as a sample for preparing standard solutions with various concentration gradients;
s2: diluting the sample in the step S1 into a standard solution with the solid content of 12% -20%, wherein the concentration gradient interval is 2%;
s3: respectively measuring the refraction concentration of the sample by using an automatic Abbe refractometer at the temperature of 20 ℃, drawing a refraction concentration (x) -solid content (y) scatter diagram, and performing linear fitting on the scatter diagram to obtain a standard curve: y = ax + b, wherein a, b are constants; when R is2When the curve is more than 0.99, the curve can be used as a standard curve for calculating the solid content, and when the curve is less than 0.99, the curve is fitted until R2Greater than 0.99;
s4: and (4) measuring the refractive concentration of the sample to be measured by using an automatic Abbe refractometer, and calculating the solid content of the molasses to be measured through the standard curve in the step S3.
Data of a standard curve is plotted according to the procedures described in examples 1 to 5, and is shown in fig. 1, in order to verify the accuracy of the method for detecting the solid content of the modified alcohol amine in example 1, the modified alcohol amine is configured into standard solutions with solid contents of 16%, 23%, 31%, 39% and 46%, respectively, the solid content of each standard solution is detected by using the method described in example 1 and is compared with an actual value, and the test result is shown in fig. 2.
From the test solid content result of fig. 2, the test error of the standard solution with each concentration is below 1%, which shows the excellent test accuracy of the test method of the invention; the method disclosed by the invention is simple to operate, short in detection time and high in test result precision, and overcomes the defects of multiple operation steps, long detection time and low test result precision of the conventional heating, drying and weighing method; the accuracy of the two methods is compared in the figure 3, and the method for quickly and accurately measuring the solid content of the brine enables the cement grinding aid production to be quickly, stably and reliably carried out in the process of raw material inspection, thereby being beneficial to increasing the stability and reliability of the cement grinding aid and reducing the production cost.
Claims (7)
1. A method for rapidly and accurately measuring the solid content of a liquid raw material of a cement grinding aid is characterized by comprising the following steps:
s1: determining the solid content of the liquid raw material of the cement grinding aid by adopting the existing specified method, and using the liquid raw material sample with the accurately measured solid content for subsequent preparation of each concentration gradient standard solution;
s2: preparing a plurality of gradient solid content standard solutions by using the liquid raw material sample with the accurately measured solid content in the step S1, and measuring the refractive concentration of the standard solutions by using an automatic Abbe refractometer under the condition of constant temperature;
s3: drawing a scatter diagram by taking the refraction concentration measured by an automatic Abbe refractometer as a vertical coordinate y and the solid content of the standard solution as a horizontal coordinate x, and performing linear fitting on the scatter diagram to obtain a standard curve between the solid content and the refraction concentration; correlation coefficient R of standard curve2Keeping the value greater than the specific value, and testing again until R is less than the specific value2Greater than a specified value;
s4: and (5) measuring the refraction concentration of the sample to be measured by using an automatic Abbe refractometer under the temperature condition in the step S2, and calculating the solid content of the sample to be measured according to the standard curve in the step S3.
2. The method for rapidly and accurately measuring the solid content of the liquid raw material of the cement grinding aid according to claim 1, characterized in that: the solid content of the liquid raw material in the step S1 is within the range of 5% -80%.
3. The method for rapidly and accurately measuring the solid content of the liquid raw material of the cement grinding aid according to claim 1, characterized in that: the constant temperature in step S2 was 20 ℃.
4. The method for rapidly and accurately measuring the solid content of the liquid raw material of the cement grinding aid according to claim 1, characterized in that: in the step S2, the solid content of the gradient is in the range of 5% -60%, and the solid content interval of the gradient is 1% -5%, preferably 2.0%.
5. The method for rapidly and accurately measuring the solid content of the liquid raw material of the cement grinding aid according to claim 1, characterized in that: correlation coefficient R of the standard curve in step S22A particular value of greater than 0.99.
6. The method for rapidly and accurately measuring the solid content of the liquid raw material of the cement grinding aid according to claim 1, characterized in that: the expression of the standard curve in step S2 is y = ax + b, where a and b are constants, a is the slope of the standard curve, and b is the intercept of the ordinate of the standard curve.
7. The method for rapidly and accurately measuring the solid content of the liquid raw material of the cement grinding aid according to claim 1, characterized in that: the technical parameters of the automatic Abbe refractometer in the steps S2-S4 are 0-100% of the measurement range, 0.01% of resolution, 0.1% -0.1% of indicating value error and 198v-242v of power supply.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031602A (en) * | 1987-08-21 | 1989-03-08 | 江苏省丹徒县分析仪器厂 | Fast detector of liquid density |
| CA2367205A1 (en) * | 1999-04-07 | 2000-10-12 | Dror Selivansky | Synthetic fibers and cementitious systems including same |
| CN102818785A (en) * | 2012-05-07 | 2012-12-12 | 天津市建筑材料产品质量监督检测中心 | Identification and detection method of doped polymers in cement-based materials and products thereof |
| CN103852447A (en) * | 2014-03-19 | 2014-06-11 | 武汉苏博新型建材有限公司 | Method for rapidly measuring solid content of concrete admixture by virtue of refractive index |
| CN110208138A (en) * | 2019-06-10 | 2019-09-06 | 甘肃路桥建设集团有限公司 | A kind of accelerator solid content intellectualized detection method |
| CN110208137A (en) * | 2019-06-10 | 2019-09-06 | 甘肃路桥建设集团有限公司 | A kind of polycarboxylate water-reducer solid content intellectualized detection method |
-
2020
- 2020-09-09 CN CN202010940798.3A patent/CN112033933A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031602A (en) * | 1987-08-21 | 1989-03-08 | 江苏省丹徒县分析仪器厂 | Fast detector of liquid density |
| CA2367205A1 (en) * | 1999-04-07 | 2000-10-12 | Dror Selivansky | Synthetic fibers and cementitious systems including same |
| CN102818785A (en) * | 2012-05-07 | 2012-12-12 | 天津市建筑材料产品质量监督检测中心 | Identification and detection method of doped polymers in cement-based materials and products thereof |
| CN103852447A (en) * | 2014-03-19 | 2014-06-11 | 武汉苏博新型建材有限公司 | Method for rapidly measuring solid content of concrete admixture by virtue of refractive index |
| CN110208138A (en) * | 2019-06-10 | 2019-09-06 | 甘肃路桥建设集团有限公司 | A kind of accelerator solid content intellectualized detection method |
| CN110208137A (en) * | 2019-06-10 | 2019-09-06 | 甘肃路桥建设集团有限公司 | A kind of polycarboxylate water-reducer solid content intellectualized detection method |
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Address after: Room 208, No. 1 Building, No. 9 Wanjiang Avenue, Jiangbei Industrial Concentration Area, Wuhu City, Anhui Province, 230000 Applicant after: Anhui Conch Material Technology Co.,Ltd. Applicant after: Meishan conch New Material Technology Co.,Ltd. Address before: Room 208, No. 1 Building, No. 9 Wanjiang Avenue, Jiangbei Industrial Concentration Area, Wuhu City, Anhui Province, 230000 Applicant before: Anhui Conch New Materials Technology Co.,Ltd. Applicant before: Meishan conch New Material Technology Co.,Ltd. |
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Application publication date: 20201204 |