YB/T 4225-2010 PDF English
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YB/T 4225-2010: Method for determination of silicon dioxide content in arenaceous quartz
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/YBT4225-2010YB FERROUS METAL INDUSTRY STANDARD ICS 29.050 Q 51 Method for determination of silicon dioxide content in arenaceous quartz Issued on. NOVEMBER 11, 2010 Implemented on. MARCH 01, 2011 Issued by. Ministry of Industry and Information Technology of the People's Republic of China
Table of Contents
Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Principle... 4 4 Instruments... 4 5 Reagents... 5 6 Preparation of samples... 5 7 Test procedures... 5 8 Analysis results... 6 9 Precision... 6 10 Test report... 6Foreword
This Standard was proposed by China Iron and Steel Industry Association. This Standard shall be under the jurisdiction of Subcommittee on Carbon Materials of National Technical Committee on Steel of Standardization Administration of China. Drafting organizations of this Standard. Fangda Carbon New Material Co., Ltd., Carbon Branch of Datong Energy Development Co., Ltd. of Shanxi Jinneng Group, China Metallurgical Information and Standardization Institute. Main drafters of this Standard. Zhang Guilan, Zhang Xiangjun, Wu Aiyun, Zhu Ting, Zhang Jie. Method for determination of silicon dioxide content in arenaceous quartz1 Scope
This Standard specifies the principle, instruments, sample requirements, test procedures and test results of the determination of silicon dioxide content in arenaceous quartz. This Standard applies to the determination of silicon dioxide content in arenaceous quartz for carbon production.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values3 Principle
The sample is decomposed with hydrofluoric acid and nitric acid. Sulfuric acid emits smoke to drive off silicon and fluorine. The sample is burned to constant weight at high temperature.4 Instruments
4.1 Balance, with a division of 0.1 mg. 4.2 Platinum crucible, 30 mL. 4.3 Automatic temperature control drying oven.5 Reagents
5.1 Nitric acid, ρ. 1.40 g/cm3, analytically pure. 5.2 Sulfuric acid (1.3), analytically pure.6 Preparation of samples
PUT the sample in an oven at (120 °C ± 5 °C) for 2 h to dry; TAKE it out to cool. USE the quarter method to divide 50 g ~ 60 g of the sample.7 Test procedures
7.1 Sample mass WEIGH 0.5 g of sample, accurate to ±0.001 g. 7.2 Determination 7.2.1 PLACE the sample in a platinum crucible (4.2) that has been made to constant weight in advance; BAKE it at 120°C ± 5°C for 30 min; TAKE it out; COOL it to room temperature in a desiccator; WEIGH it as m1. 7.2.4 Continue to evaporate until the sulfuric acid smoke is exhausted and then take it down. 7.2.5 PLACE the crucible containing the residue in a muffle furnace (4.4) at 850 °C ± 10 °C for 30 min; TAKE it out and COOL it down slightly; PUT it in a desiccator to cool to room temperature; WEIGH it as m2; BURN it again for 15 min and make to constant weight, until the difference in mass between the two weighings is not more than 0.5 mg.8 Analysis results
8.1 The content of silicon dioxide is calculated as mass fraction SiO2, and the value is expressed in %. It is calculated according to the following formula.9 Precision
Under the same test conditions, the repeatability r of the test results of parallel samples is shown in Table 1.10 Test report
The test report includes the following. YB/T 4225-2010 YB FERROUS METAL INDUSTRY STANDARD ICS 29.050 Q 51 Method for determination of silicon dioxide content in arenaceous quartz Issued on. NOVEMBER 11, 2010 Implemented on. MARCH 01, 2011 Issued by. Ministry of Industry and Information Technology of the People's Republic of ChinaTable of Contents
Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Principle... 4 4 Instruments... 4 5 Reagents... 5 6 Preparation of samples... 5 7 Test procedures... 5 8 Analysis results... 6 9 Precision... 6 10 Test report... 6Foreword
This Standard was proposed by China Iron and Steel Industry Association. This Standard shall be under the jurisdiction of Subcommittee on Carbon Materials of National Technical Committee on Steel of Standardization Administration of China. Drafting organizations of this Standard. Fangda Carbon New Material Co., Ltd., Carbon Branch of Datong Energy Development Co., Ltd. of Shanxi Jinneng Group, China Metallurgical Information and Standardization Institute. Main drafters of this Standard. Zhang Guilan, Zhang Xiangjun, Wu Aiyun, Zhu Ting, Zhang Jie. Method for determination of silicon dioxide content in arenaceous quartz1 Scope
This Standard specifies the principle, instruments, sample requirements, test procedures and test results of the determination of silicon dioxide content in arenaceous quartz. This Standard applies to the determination of silicon dioxide content in arenaceous quartz for carbon production.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values3 Principle
The sample is decomposed with hydrofluoric acid and nitric acid. Sulfuric acid emits smoke to drive off silicon and fluorine. The sample is burned to constant weight at high temperature.4 Instruments
4.1 Balance, with a division of 0.1 mg. 4.2 Platinum crucible, 30 mL. 4.3 Automatic temperature control drying oven.5 Reagents
5.1 Nitric acid, ρ. 1.40 g/cm3, analytically pure. 5.2 Sulfuric acid (1.3), analytically pure.6 Preparation of samples
PUT the sample in an oven at (120 °C ± 5 °C) for 2 h to dry; TAKE it out to cool. USE the quarter method to divide 50 g ~ 60 g of the sample.7 Test procedures
7.1 Sample mass WEIGH 0.5 g of sample, accurate to ±0.001 g. 7.2 Determination 7.2.1 PLACE the sample in a platinum crucible (4.2) that has been made to constant weight in advance; BAKE it at 120°C ± 5°C for 30 min; TAKE it out; COOL it to room temperature in a desiccator; WEIGH it as m1. 7.2.4 Continue to evaporate until the sulfuric acid smoke is exhausted and then take it down. 7.2.5 PLACE the crucible containing the residue in a muffle furnace (4.4) at 850 °C ± 10 °C for 30 min; TAKE it out and COOL it down slightly; PUT it in a desiccator to cool to room temperature; WEIGH it as m2; BURN it again for 15 min and make to constant weight, until the difference in mass between the two weighings is not more than 0.5 mg.8 Analysis results
8.1 The content of silicon dioxide is calculated as mass fraction SiO2, and the value is expressed in %. It is calculated according to the following formula.9 Precision
Under the same test conditions, the repeatability r of the test results of parallel samples is shown in Table 1.10 Test report
The test report includes the following. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
