CN113390813A - Method for measuring sulfur content in silicon-nitrogen alloy - Google Patents
Method for measuring sulfur content in silicon-nitrogen alloy Download PDFInfo
- Publication number
- CN113390813A CN113390813A CN202110631598.4A CN202110631598A CN113390813A CN 113390813 A CN113390813 A CN 113390813A CN 202110631598 A CN202110631598 A CN 202110631598A CN 113390813 A CN113390813 A CN 113390813A
- Authority
- CN
- China
- Prior art keywords
- sulfur content
- sulfur
- standard substance
- sample
- fluxing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 74
- 239000011593 sulfur Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910001199 N alloy Inorganic materials 0.000 title claims abstract description 18
- UMVBXBACMIOFDO-UHFFFAOYSA-N [N].[Si] Chemical compound [N].[Si] UMVBXBACMIOFDO-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 238000005259 measurement Methods 0.000 claims abstract description 18
- YQCIWBXEVYWRCW-UHFFFAOYSA-N methane;sulfane Chemical compound C.S YQCIWBXEVYWRCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 42
- 239000000126 substance Substances 0.000 claims description 34
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 21
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 17
- 229910052721 tungsten Inorganic materials 0.000 claims description 17
- 239000010937 tungsten Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 14
- 230000004907 flux Effects 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention discloses a method for measuring sulfur content in a silicon-nitrogen alloy, which comprises the steps of pretreatment, preparation of spare parts for measurement, measurement of a sulfur content blank value, calibration of a high-frequency infrared carbon-sulfur analyzer and measurement of a sample. The method for detecting the sulfur dioxide content of the sample by using the infrared absorption method after the combustion of the high-frequency induction furnace changes the dosage and the adding sequence of the fluxing agent, ensures that the sulfur dioxide of the sample is completely released, is convenient to operate, greatly shortens the detection period, improves the detection efficiency, does not need to use a chemical reagent, reduces the pollution of the chemical reagent to the environment, and also reduces the physical injury of the chemical reagent to testers. The method for determining the sulfur content in the silicon nitrogen alloy has good stability, reproducibility and accuracy, and can meet the daily detection requirement of the sulfur content in the silicon nitrogen alloy.
Description
Technical Field
The invention belongs to the technical field of chemical analysis, and relates to a method for measuring the sulfur content in a silicon-nitrogen alloy.
Background
The silicon-nitrogen alloy is a multielement nitrogen-fixing alloy prepared by combining abundant silicon resources and trace alloy elements for nitriding. Steel companies use a large amount of silicon-nitrogen alloy in the converter steelmaking process to improve the strength of steel. However, the sulfur content in the silicon nitrogen alloy needs to be kept below a certain value, and therefore, it is extremely important to measure the sulfur content in the silicon nitrogen alloy. At present, no report is found on a method for measuring sulfur in a silicon nitrogen alloy.
Disclosure of Invention
The invention aims to provide a method for accurately measuring the sulfur content in a silicon-nitrogen alloy.
The purpose of the invention is realized by the following technical scheme: the invention discloses a method for measuring sulfur content in a silicon-nitrogen alloy, which comprises the steps of pretreatment, preparation of spare parts for measurement, measurement of a sulfur content blank value, calibration of a high-frequency infrared carbon-sulfur analyzer and measurement of a sample, and specifically comprises the following steps:
1) pretreatment:
uniformly spreading 3-5 g/g at the bottom of the crucibleTest specimenCovering the sample to be tested on the pure iron fluxing agent;
at a ratio of 4 to 6g/gTest specimenIn an amount to cover the sample to be tested with a tin flux;
covering a tungsten particle fluxing agent on the tin fluxing agent according to the amount of 8-12 g/g of the sample;
2) preparation of measurement preparations:
the first standard substance is: GBW (E)010299, sulfur content 0.0014%; the first standard substance is: GBW01246, sulfur content 0.036%; the third standard substance is: GBW (E)010313, sulfur content 0.011%;
3) measuring a blank value of the sulfur content: determining blank values of carbon contents of the pure iron fluxing agent, the tin fluxing agent and the tungsten fluxing agent in the step 1 by using a high-frequency infrared carbon and sulfur analyzer, inputting the blank values into the high-frequency infrared carbon and sulfur analyzer, and automatically deducting the blank values when the high-frequency infrared carbon and sulfur analyzer is calibrated;
4) calibrating a high-frequency infrared carbon-sulfur analyzer: the sulfur content of the first standard substance is measured and compared to its standard value for calibrating the instrument. Respectively measuring the second standard substance and the third standard substance, respectively comparing the measured values with standard values, if the content difference value is not in an allowable range, repeating the step 4 until the difference value is in the allowable range to obtain the measured values of the sulfur content of the second standard substance and the sulfur content of the third standard substance, wherein the measured values of the sulfur content of the second standard substance and the sulfur content of the third standard substance are in the allowable difference range;
5) sample measurement
And (4) carrying out sulfur content on the sample to be detected prepared in the step (1) by using a high-frequency infrared carbon-sulfur analyzer according to the working conditions selected in the step (4).
The invention has the beneficial effects that:
1) the invention changes the dosage and adding sequence of the fluxing agent and uses the infrared absorption method after the combustion of the high-frequency induction furnace to determine the sulfur dioxide content of the sample, so that the sulfur dioxide of the sample is completely released, the operation is convenient, the detection period is greatly shortened, the detection efficiency is improved, meanwhile, the chemical reagent is not needed, the pollution of the chemical reagent to the environment is reduced, and the harm of the chemical reagent to the body of a tester is also reduced.
2) The method for determining the sulfur content in the silicon nitrogen alloy has good stability, reproducibility and accuracy, and can meet the daily detection requirement of the sulfur content in the silicon nitrogen alloy.
Detailed Description
The invention is further described below with reference to specific embodiments.
The invention discloses a method for measuring sulfur content in a silicon-nitrogen alloy, which comprises the steps of pretreatment, preparation of spare parts for measurement, measurement of a sulfur content blank value, calibration of a high-frequency infrared carbon-sulfur analyzer and measurement of a sample, and specifically comprises the following steps:
1) pretreatment:
uniformly spreading 3-5 g/g at the bottom of the crucibleTest specimenCovering the sample to be tested on the pure iron fluxing agent;
at a ratio of 4 to 6g/gTest specimenIn an amount to cover the sample to be tested with a tin flux;
covering a tungsten particle fluxing agent on the tin fluxing agent according to the amount of 8-12 g/g of the sample;
2) preparation of measurement preparations:
the first standard substance is: GBW (E)010299, sulfur content 0.0014%; the first standard substance is: GBW01246, sulfur content 0.036%; the third standard substance is: GBW (E)010313, sulfur content 0.011%;
3) measuring a blank value of the sulfur content: determining blank values of carbon contents of the pure iron fluxing agent, the tin fluxing agent and the tungsten fluxing agent in the step 1 by using a high-frequency infrared carbon and sulfur analyzer, inputting the blank values into the high-frequency infrared carbon and sulfur analyzer, and automatically deducting the blank values when the high-frequency infrared carbon and sulfur analyzer is calibrated;
4) calibrating a high-frequency infrared carbon-sulfur analyzer: the sulfur content of the first standard substance is measured and compared to its standard value for calibrating the instrument. Respectively measuring the second standard substance and the third standard substance, respectively comparing the measured values with standard values, if the content difference value is not in an allowable range, repeating the step 4 until the difference value is in the allowable range to obtain the measured values of the sulfur content of the second standard substance and the sulfur content of the third standard substance, wherein the measured values of the sulfur content of the second standard substance and the sulfur content of the third standard substance are in the allowable difference range;
5) sample measurement
And (4) carrying out sulfur content on the sample to be detected prepared in the step (1) by using a high-frequency infrared carbon-sulfur analyzer according to the working conditions selected in the step (4).
The working conditions of the high-frequency infrared carbon and sulfur analyzer are as follows: a cut-off level 7; the temperature of the combustion furnace is 1300 ℃; the number of integration times is 1; minimum analysis time 32 s; the maximum analysis time was 50 s.
The tin particle fluxing agent is a commercially available tin fluxing agent with tin of more than 99.95 percent.
The pure iron fluxing agent is a commercial pure iron fluxing agent with iron content of more than 99.90%.
The tungsten particle fluxing agent is a commercially available pure tungsten fluxing agent with tungsten content of more than 99.95%.
Example 1
Placing the special ceramic crucible for carbon and sulfur analysis in a high-temperature furnace, firing at 1000 ℃ for 40min, taking out the crucible, placing the crucible in a clean heat-resistant disc, cooling for 2 min-3 min, and finally storing the crucible in a dryer;
taking out the ceramic crucible, adding 0.30g of tin particle fluxing agent, 0.50g of pure iron fluxing agent and 10g of tungsten particle fluxing agent into the ceramic crucible, measuring and analyzing by an infrared absorption method after combustion in a high-frequency induction furnace, repeatedly measuring for three times, taking an average value to obtain an average blank value, inputting the average blank value, and automatically calibrating the blank value by an instrument.
Selecting 3 ceramic crucibles in the step 1A as the first standard substance, and respectively adding 0.30g of tin particle fluxing agent;
the sulphur content of the first standard substance was determined according to the selected operating conditions (cut-off level 7; furnace temperature 1300 ℃; number of integrations 1; shortest analysis time 32 s; longest analysis time 50s), with a measured value of 0.0018, compared to its standard value of 0.0014 and the instrument was calibrated. The second and third standard substances were measured to be 0.038 and 0.014, respectively, and the content difference was within the allowable range as compared with the standard value.
Example 2
3g of pure iron fluxing agent is evenly laid at the bottom of the crucible, 1g of a sample to be tested is weighed to cover the pure iron fluxing agent, 5g of tin fluxing agent is covered on the sample to be tested, 10g of tungsten particle fluxing agent is covered on the tin fluxing agent, and finally the crucible is placed in a high-frequency infrared carbon-sulfur analyzer to measure the sulfur content according to the working conditions selected in the embodiment 1, so that the sulfur content value is 0.013%.
Example 3
5g of pure iron fluxing agent is evenly laid at the bottom of the crucible, 1g of a sample to be tested is weighed to cover the pure iron fluxing agent, 4g of tin fluxing agent is covered on the sample to be tested, 8g of tungsten particle fluxing agent is covered on the tin fluxing agent, and finally the crucible is placed in a high-frequency infrared carbon-sulfur analyzer to measure the sulfur content according to the working conditions selected in the embodiment 1, so that the sulfur content value is 0.013%.
Example 4
4g of pure iron fluxing agent is evenly laid at the bottom of the crucible, 1g of a sample to be tested is weighed to cover the pure iron fluxing agent, 6g of tin fluxing agent is covered on the sample to be tested, 12g of tungsten particle fluxing agent is covered on the tin fluxing agent, and finally the crucible is placed in a high-frequency infrared carbon-sulfur analyzer to measure the sulfur content according to the working conditions selected in the embodiment 1, so that the sulfur content value is 0.013%.
Example 5
5g of pure iron fluxing agent is evenly laid at the bottom of the crucible, 1g of a sample to be tested is weighed to cover the pure iron fluxing agent, 5g of tin fluxing agent is covered on the sample to be tested, 9g of tungsten particle fluxing agent is covered on the tin fluxing agent, and finally the crucible is placed in a high-frequency infrared carbon-sulfur analyzer to measure the sulfur content according to the working conditions selected in the embodiment 1, so that the sulfur content value is 0.013%.
Claims (6)
1. The method for measuring the sulfur content in the silicon-nitrogen alloy is characterized by comprising the steps of pretreatment, preparation of spare parts for measurement, measurement of a sulfur content blank value, calibration of a high-frequency infrared carbon-sulfur analyzer and measurement of a sample, and specifically comprises the following steps:
1) pretreatment:
uniformly spreading 3-5 g/g at the bottom of the crucibleTest specimenCovering the sample to be tested on the pure iron fluxing agent;
at a ratio of 4 to 6g/gTest specimenIn an amount to cover the sample to be tested with a tin flux;
covering a tungsten particle fluxing agent on the tin fluxing agent according to the amount of 8-12 g/g of the sample;
2) preparation of measurement preparations:
the first standard substance is: GBW (E)010299, sulfur content 0.0014%; the first standard substance is: GBW01246, sulfur content 0.036%; the third standard substance is: GBW (E)010313, sulfur content 0.011%;
3) measuring a blank value of the sulfur content: determining blank values of carbon contents of the pure iron fluxing agent, the tin fluxing agent and the tungsten fluxing agent in the step 1 by using a high-frequency infrared carbon and sulfur analyzer, inputting the blank values into the high-frequency infrared carbon and sulfur analyzer, and automatically deducting the blank values when the high-frequency infrared carbon and sulfur analyzer is calibrated;
4) calibrating a high-frequency infrared carbon-sulfur analyzer: measuring the sulfur content of the first standard substance, and comparing the sulfur content with a standard value to calibrate the instrument; respectively measuring the second standard substance and the third standard substance, respectively comparing the measured values with standard values, if the content difference value is not in an allowable range, repeating the step 4 until the difference value is in the allowable range to obtain the measured values of the sulfur content of the second standard substance and the sulfur content of the third standard substance, wherein the measured values of the sulfur content of the second standard substance and the sulfur content of the third standard substance are in the allowable difference range;
5) and (3) sample measurement:
and (4) carrying out sulfur content on the sample to be detected prepared in the step (1) by using a high-frequency infrared carbon-sulfur analyzer according to the working conditions selected in the step (4).
2. The method for measuring the sulfur content in the silicon nitrogen alloy according to claim 1, wherein the operating conditions of the high-frequency infrared carbon-sulfur analyzer are as follows: a cut-off level 7; the temperature of the combustion furnace is 1300 ℃; the number of integration times is 1; minimum analysis time 32 s; the maximum analysis time was 50 s.
3. The method for measuring the sulfur content in silicon nitride alloy as defined in claim 1, wherein in step 1, the crucible is burned at 900-1100 ℃ for 30-50min in a high temperature furnace before use, the crucible is taken out, placed in a clean heat-resistant plate, cooled for 2-3 min, and finally stored in a dryer.
4. The method of determining sulfur content in a silicon nitride alloy according to claim 1, wherein the tin particle flux is a commercially available tin flux with >99.95% tin.
5. The method for determining sulfur content in a silicon nitride alloy according to claim 1, wherein the pure iron flux is a commercially available pure iron flux with iron > 99.90%.
6. The method for determining the sulfur content in a silicon nitride alloy according to claim 1, wherein the tungsten particle flux is a commercially available pure tungsten flux with tungsten > 99.95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110631598.4A CN113390813A (en) | 2021-06-07 | 2021-06-07 | Method for measuring sulfur content in silicon-nitrogen alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110631598.4A CN113390813A (en) | 2021-06-07 | 2021-06-07 | Method for measuring sulfur content in silicon-nitrogen alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113390813A true CN113390813A (en) | 2021-09-14 |
Family
ID=77618304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110631598.4A Pending CN113390813A (en) | 2021-06-07 | 2021-06-07 | Method for measuring sulfur content in silicon-nitrogen alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113390813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235734A (en) * | 2021-10-25 | 2022-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for determining high-sulfur content in pyrite |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975760A (en) * | 2010-10-08 | 2011-02-16 | 中国航空工业集团公司北京航空材料研究院 | Method for measuring sulfur content in powdered high-temperature alloy |
| CN103196863A (en) * | 2013-03-21 | 2013-07-10 | 内蒙古包钢钢联股份有限公司 | Method for determining contents of carbon and sulfur in iron alloy by using infrared absorption method with calibration of different reference materials |
| CN103245633A (en) * | 2013-05-16 | 2013-08-14 | 内蒙古包钢钢联股份有限公司 | Method of measuring carbon and sulfur contents in rare earth aluminum alloy through different reference material calibration infrared absorption method |
| CN104483286A (en) * | 2014-12-16 | 2015-04-01 | 内蒙古包钢钢联股份有限公司 | Method for determining contents of carbon and sulfur in iron-containing dust mud |
| CN104964945A (en) * | 2015-06-12 | 2015-10-07 | 内蒙古包钢钢联股份有限公司 | Method for measuring content of carbon in vanadium-nitrogen alloy |
-
2021
- 2021-06-07 CN CN202110631598.4A patent/CN113390813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975760A (en) * | 2010-10-08 | 2011-02-16 | 中国航空工业集团公司北京航空材料研究院 | Method for measuring sulfur content in powdered high-temperature alloy |
| CN103196863A (en) * | 2013-03-21 | 2013-07-10 | 内蒙古包钢钢联股份有限公司 | Method for determining contents of carbon and sulfur in iron alloy by using infrared absorption method with calibration of different reference materials |
| CN103245633A (en) * | 2013-05-16 | 2013-08-14 | 内蒙古包钢钢联股份有限公司 | Method of measuring carbon and sulfur contents in rare earth aluminum alloy through different reference material calibration infrared absorption method |
| CN104483286A (en) * | 2014-12-16 | 2015-04-01 | 内蒙古包钢钢联股份有限公司 | Method for determining contents of carbon and sulfur in iron-containing dust mud |
| CN104964945A (en) * | 2015-06-12 | 2015-10-07 | 内蒙古包钢钢联股份有限公司 | Method for measuring content of carbon in vanadium-nitrogen alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235734A (en) * | 2021-10-25 | 2022-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for determining high-sulfur content in pyrite |
| CN114235734B (en) * | 2021-10-25 | 2023-03-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for determining high-sulfur content in pyrite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106053507A (en) | Analysis method for measuring contents of calcium oxide, silicon dioxide and sulfur in granular ash or active ash by utilizing X-ray fluorescent spectrometry method | |
| CN109540830A (en) | A kind of method of carbon content in measurement ferro-niobium | |
| CN110296953A (en) | A kind of method that infrared absorption method surveys carbon content in high carbon ferro-chrome | |
| CN107436292A (en) | The method for determining sulfur content in covering slag | |
| CN113390813A (en) | Method for measuring sulfur content in silicon-nitrogen alloy | |
| CN101660995B (en) | Method of measuring total content of rare earth in rare earth chrome-manganese-silicon inoculant | |
| CN110646452A (en) | Method for measuring major elements in ferrochrome alloy by X fluorescence fuse link method | |
| CN113138175A (en) | Method for determining carbon content in niobium-tungsten alloy | |
| CN115575430A (en) | Method for measuring elements in blast furnace slag by melting sample preparation-X-ray fluorescence | |
| CN113514486A (en) | Method for measuring silicon content in silicon-carbon spheres | |
| CN106959318A (en) | A kind of method for determining full content of Sulphur in coal | |
| CN107153045A (en) | A kind of method that infrared absorption determines carbon content in covering agent in Ultra-low carbon | |
| CN110736714B (en) | Method for rapidly determining content of free carbon in mold flux | |
| CN113155879A (en) | Method for measuring contents of silicon dioxide and calcium fluoride in fluorite | |
| CN112649456A (en) | Light-burned magnesium ball high-temperature melting X-ray fluorescence analysis method | |
| CN113189086A (en) | Method for measuring MgO activity in high-aluminum blast furnace slag | |
| CN106338485B (en) | The detection method of sulfur content in silicon-steel grade magnesium oxide | |
| CN105738334B (en) | A kind of method that solid sampling hg determining device measures the mercury in marine product with atomic fluorescence combination | |
| CN109633074A (en) | A kind of method of self-produced coke production hot performance standard sample | |
| CN114002249B (en) | Combined determination method of molten iron heat preservation agent element by X fluorescence spectrometry | |
| Hemmerlin et al. | Determination of ultra-low carbon and nitrogen contents in steel: combustion versus electrical spark source optical emission spectrometry for steelmaking process control | |
| CN109342405A (en) | The detection method of wax oil nitrogen content | |
| CN114324230A (en) | Method for determining sulfur content in tin dioxide by using infrared carbon-sulfur analyzer | |
| CN114354577B (en) | Quantitative analysis method and device for acid insoluble aluminum in steel | |
| CN103018193A (en) | Method for measuring content of sulfur dioxide in coal combustion improver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210914 |
|
| RJ01 | Rejection of invention patent application after publication |