GB/T 3044-2020 English PDFUS$559.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 3044-2020: Chemical analysis methods for white fused alumina and pink fused alumina Status: Valid GB/T 3044: Historical versions
Basic dataStandard ID: GB/T 3044-2020 (GB/T3044-2020)Description (Translated English): Chemical analysis methods for white fused alumina and pink fused alumina Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J43 Classification of International Standard: 25.100.70 Word Count Estimation: 30,377 Date of Issue: 2020-07-21 Date of Implementation: 2021-02-01 Older Standard (superseded by this standard): GB/T 3044-2007 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 3044-2020: Chemical analysis methods for white fused alumina and pink fused alumina---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Chemical analysis methods for white fused alumina and pink fused alumina ICS 25.100.70 J43 National Standards of People's Republic of China Replace GB/T 3044-2007 Chemical analysis method of white corundum and chromium corundum 2020-07-21 released 2021-02-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsForeword Ⅰ 1 Scope 1 2 Normative references 1 3 Preparation of analysis samples 1 4 Determination of burning loss (or burning increase) 1 5 Determination of silica 2 6 Determination of iron trioxide 5 7 Determination of potassium oxide and sodium oxide 7 8 Determination of chromium trioxide 10 9 Determination of calcium oxide (atomic absorption spectrophotometry) 13 10 Determination of Magnesium Oxide (Atomic Absorption Spectrophotometry) 15 11 X-ray fluorescence spectroscopy (melting cast glass method) 16 12 Inductively coupled plasma atomic emission spectrometry analysis 20 13 Determination of aluminum oxide 23 14 Test report 26ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 3044-2007 "White corundum, chromium corundum chemical analysis method", compared with GB/T 3044-2007, mainly The technical changes are as follows. ---Modified the preparation of analysis samples (see Chapter 3, Chapter 3 of the.2007 edition); ---Added the sulfosalicylic acid colorimetric method for the determination of iron trioxide (see 6.2); --- Added X-ray fluorescence spectroscopy (melting cast glass method) (see Chapter 11); ---Added inductively coupled plasma atomic emission spectrometry (see Chapter 12). This standard was proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Abrasives Standardization Technical Committee (SAC/TC139). Drafting organizations of this standard. Zhengzhou Abrasives Grinding Research Institute Co., Ltd., Zhengzhou Yufa Advanced Materials Co., Ltd., Zibo Jinjiyuan Research Institute Abrasives Co., Ltd., Shandong Luxin Sisha Taishan Abrasives Co., Ltd. The main drafters of this standard. Zhang Yi, Chen Xuebin, He Shizun, Ding Jianping, Xu Jifeng, Zhang Linzhou, Yuan Quanzhong, Ding Jie, Wang Min. The previous versions of the standard replaced by this standard are as follows. ---GB/T 3044-1989, GB/T 3044-2007. Chemical analysis method of white corundum and chromium corundum1 ScopeThis standard specifies the burning loss (or burning increase) in white corundum, chromium corundum abrasives and crystal blocks, silicon dioxide, iron trioxide, potassium oxide, oxidation Methods for determination of sodium, chromium oxide, calcium oxide, magnesium oxide, and aluminum oxide. This standard applies to the determination of the chemical composition of white corundum, chromium corundum abrasives and crystal blocks. This standard does not apply to products whose composition changes after use.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 4676 Common abrasive sampling method3 Preparation of analysis samples3.1 Crystal block sample Take a statistically representative crystal block, crush it to completely pass through a screen with a basic mesh size of 2mm, and use a magnet (each magnetic pole The magnetic flux is 3.5×10-2mWb~4.5×10-2mWb, the difference between the magnetic flux of the two magnetic poles is not more than 0.3×10-2mWb) Suction and remove the powder Iron brought in from the broken pieces. Mix evenly and reduce to 10g~20g by quarter method. Continue to grind with a corundum mortar until all of it passes through the mesh Screen with a size of 106 μm. Mix well, put it into the sample bag, dry it in an oven at 105℃~110℃ for 1h, take it out, and put it in a desiccator Medium, cool for later use. 3.2 Abrasive samples Sampling and reduction are carried out in accordance with GB/T 4676. Abrasives with a particle size greater than 106μm are first reduced to 10g~20g, and then finely ground with a corundum mortar until the basic size of the mesh is 106μm. Mix the sieve evenly, put it into the sample bag, dry it in an oven at 105℃~110℃ for 1h, take it out, put it in a desiccator, and cool it for later use. Abrasives with a particle size of not more than 106μm are reduced to 10g~20g, put into a sample bag, and dried in an oven at 105℃~110℃ for 1h. Take it out, put it in a desiccator, and cool it for later use. 4 Determination of burning loss (or burning increase) 4.1 Analysis steps Weigh about 1g of the sample, accurate to 0.0001g, and put it into a platinum crucible previously burned to a constant weight in a high-temperature furnace at 1100℃, and write down the crucible Add the mass of the sample, slightly lift the lid, place it in a high temperature furnace at 1100°C and burn it for 1 hour, take it out, cool it in a desiccator, weigh it, and burn it repeatedly to Constant weight, the holding time for repeated burning is 20min. 4.2 Calculation of analysis results The mass fraction w(A) of burning loss, expressed in %, is calculated according to formula (1). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 3044-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 3044-2020_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 3044-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 3044-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
