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GB/T 2001-2013: Coke - Determination of proximate analysis Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 2001: Historical versions
GB/T 2001-2013: Coke-Determination of proximate analysis---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/GBT2001-2013GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.160.10 H 32 Replacing GB/T 2001-1991 Coke - Determination of proximate analysis Issued on. DECEMBER 17, 2013 Implemented on. MAY 1, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Determination of moisture... 5 4 Determination of ash content... 8 5 Determination of coke volatilization content... 13 6 Calculation of coke’s fixed carbon... 17 7 Determination method of automatic industrial analyzer... 17 8 Test report... 18 Appendix A... 19ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 2001-1991 “Coke - Determination of proximate analysis”. Comparing with GB/T 2001-1991, the main changes are as follows. - Add “Foreword”; - Modify the standard format; adjust the structure; - Appropriately modify the terms and definitions in this Standard; - Delete GB/T 9977 “The terms of coking products” and YB/T 5155 “General rule for determination of coke and coal chemicals” from “Normative references”; - Add “Place in the pre-blast drying oven” in 3.2 “Principle”; - Add “For heat-resistant, corrosion-resistant materials, its specification shall be able to accommodate 500 g of sample; load of per unit area shall not exceed 1g/cm2; the depth of tray is about 20 mm” in 3.4.2 “Tray”; - In 3.4 “Apparatus”, modify the sensitivity of industrial scale used in the test to 0.1 g; in 3.6.1 “Determination step of total moisture”, modify sample weight to (500±10) g, and make it accurate to 0.1 g; - In 3.6.2 “Determination of air dried moisture”, add “Pre-blast” and “Drying under the conditions of the blasting” in test steps; - In 3.6.2.1, 4.6.1.1, and 4.6.2.1, make weighing accuracy from 0.0002 g to 0.0001 g; - Modify “Weighing it to” to “Making it accurate to” in the standard; - Respectively add “Note” in 3.6.2.2, 4.4.2 and 5.5.2; - Add “Calibrate thermocouple at least once a year” in 4.4.1 and 5.3.2; - Add 4.4.6 “Heat-resistant porcelain or asbestos slate”; - In 4.6.1.1, add “Nicely pave it in the cupel, so as to make the mass per cm2 not exceed 0.10 g”; - In 5.3.1, add “Volatilization content crucible must closely coordinate with crucible cover. The selection of crucible cover must make vertical clearance between the cover and the crucible not greater than 0.5 mm. The crucible and the crucible cover shall be used in conjunction. Mixed use is not allowed”; - List “Note” of 5.5.1 into 5.5.1; - Add 6.2 “Calculate the coke’s dried basis fixed carbon”; - Add 7 “Determination method of automatic industrial analyzer”, refer to Appendix A for details; - Add “Test report”. This Standard was proposed by China Iron and Steel Association. This Standard shall be under the jurisdiction of Coking Chemical Technical Committee of National Technical Committee on Coal Chemical Industry of Standardization Administration of China (TC 469/SC 3). The drafting organizations of this Standard. Sinosteel Anshan Thermal Energy Research Institute Co. Ltd., Hunan Sundy Science and Technology Development Co., Ltd. AND China Metallurgical Information & Standardization Institute. Main drafters of this Standard. Wang Xiong, Wang Wei, Liang Dong, Sun Wei, Guo Faqing, Qiu Jinhui, Zheng Jingxu, Wu Hanjiong and Zhang Jinying. This Standard replaces the following previous standards. - GB/T 2001-1991; - GB 2001-1980, GB 2002-1980, GB 2003-1980, GB 2004-1980. Coke - Determination of proximate analysis Warning. Use of this Standard may involve operations and equipment of hazardous materials. However, there is no recommendation concerning the safety. Before using this Standard, the user shall have responsibility to take appropriate safety and protective measures to ensure the use to comply with relevant national regulations.1 ScopeThis Standard specifies the determination methods of coke’s total moisture, air dried basis moisture, ash content and volatilization content as well as calculation method of fixed carbon. This Standard is applicable to the determination of coke’s total moisture, air dried basis moisture, ash content and volatilization content as well as calculation of fixed carbon.2 Normative referencesThe 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 1997 Coke - Sampling and preparation of samples3 Determination of moisture3.1 General rule This Clause specifies the determination method of coke’s total moisture and air dried basis moisture. 3.2 Principle Weigh a certain mass of coke sample; place in the pre-blast drying oven. At a certain temperature, dry it to constant mass. Calculate moisture’s mass score by mass loss of coke sample. 3.3 Reagents 3.4 Apparatus 3.4.1 Drying oven. equipped with automatic temperature control and ventilation device; and be able to maintain the temperature within 170°C ~ 180°C and 105°C ~ 110°C. 3.4.5 Analytical balance. sensitivity is 0.0001 g. 3.4.6 Industrial balance. sensitivity is 0.1 g 3.5 Sample’s sampling and preparation Conduct sample’s sampling and preparation according to the provisions in GB/T 1997. 3.6 Test steps 3.6.1 Determination of total moisture 3.6.1.1 Use dry and clean tray (see 3.4.2) of known mass to weigh (500±10) g of coke sample, of which the granularity is less than 13 mm, accurate to 0.1 g; make it paved in the tray. 3.6.2 Determination of air dried moisture 3.6.2.1 In the pre-dried and weighed weighing bottle, weigh 1g±0.5g of analytical sample of which the granularity is less than 0.2 mm, accurate to 0.0001 g; pave in the weighing bottle. 3.6.2.2 Remove the cover of the weighing bottle that holds sample into the pre- blasted drying oven that has been previously heated to 105°C ~ 110°C. Dry it for 1 h under the conditions of the blasting. 3.7 Calculation of results 3.7.1 Calculate the total moisture, according to equation (1). 3.7.2 Calculate coke’s air dried basis moisture, according to equation (2). 3.7.3 Take arithmetic mean value of two test results as the test result. 3.7.4 Precision. repeatability of moisture determination must not exceed the stipulated values in Table 1.4 Determination of ash content4.1 General rule This Clause specified two determination methods of coke ash content. Method 1 and Method 2.Method 1 is the arbitration method. 4.2 Principle Weigh a certain mass of coke sample. Gradually put it into the muffle furnace that has been pre-heated to (815±10) °C for ashing. Burn it till mass is constant. Take the mass score of residue mass that accounts for coke sample mass AS the coke’s ash content. 4.3 Reagents 4.4 Apparatus 4.4.1 Muffle furnace. equipped with temperature measurement and temperature control devices, is able to maintain the temperature within 815°C±10°C. Furnace has sufficient temperature zone. 4.4.2 Cupel. porcelain, shape and inner diameter size are shown in Figure 3. 4.4.3 Cupel clamp. made of heat-resistant metal wire; shape is shown in Figure 4.It can also use crucible clamp. Figure 4 Cupel clamp 4.4.4 Dryer. built-in with allochroic silica gel or granular anhydrous calcium chloride desiccant. 4.4.5 Analytical balance. sensitivity is 0.0001 g. 4.4.6 Heat-resistant porcelain or asbestos slate. 4.5 Sample’s sampling and preparation Sample’s sampling and preparation shall be conducted according to the provisions in GB/T 1997. 4.6 Test steps 4.6.1 Method 1 (arbitration method) 4.6.1.4 Conduct inspection burning at 815°C±10°C, 15 min for each time till the sample mass difference between 2 consecutive times does not exceed 0.001 g or till the mass increases. When calculating, take the last mass. If the mass increases, take the mass before it increases as calculation basis. 4.6.2 Method 2 4.6.2.1 In the cupel that has been pre-burnt to constant mass, weigh 0.5±0.05 g of coke sample of which the granularity is less than 0.2 mm and has been evenly stirred, accurate to 0.0001 g; nicely pave it in the cupel, so as to make the mass per cm2 not exceed 0.10 g. 4.7 Calculation of results 4.7.1 Calculate air dried ash content of coke, according to equation (3).5 Determination of coke volatilization content5.1 Principle Weigh a certain mass of coke sample. Put it in a porcelain crucible with cover. At 900°C±10°C, heat it while isolating air for 7 min. The mass score of reduced mass that accounts for coke sample mass MINUS air dried basis moisture content of this coke sample EQUALS to the coke volatilization content. 5.2 Regents 5.3 Apparatus 5.3.1 Volatilization content crucible. equipped with porcelain crucible with tight cover; shape and size are shown in Figure 5.Crucible’s total mass is 18 g ~ 22 g, and the cover’s mass is 5 g ~ 6 g. The volatilization content crucible must closely coordinate with crucible cover. The selection of crucible cover must make vertical clearance between the cover and the crucible not greater than 0.5 mm. The crucible and the crucible cover shall be used in conjunction. Mixed use is not allowed. 5.3.3 Crucible holder. made of nickel-chromium wire or other heat-resistant metal wires. Its shape and size are shown in Figure 6.Its size enables all crucibles in the constant temperature zone. The distance between crucible bottom on crucible holder and furnace bottom shall be 30 mm ~ 40 mm. 5.3.4 Crucible holder clamp. made of nickel-chromium wire or other heat- resistant metal wires. Its shape and size are shown in Figure 7.It also can use crucible clamp. 5.3.5 Analytical balance. sensitivity is 0.0001 g. 5.3.6 Stopwatch. 5.3.7 Dryer. built-in with allochroic silica gel or granular anhydrous calcium chloride. 5.4 Sample sampling and preparation Conduct sample sampling and preparation according to the provisions in GB/T 1997. 5.5 Test steps 5.5.1 In the porcelain crucible with cover that has been pre-burnt to constant mass at 900°C±10°C, weigh evenly stirred coke sample of which the granularity is less than 0.2 mm, accurate to 0.0001 g; gently vibrate the crucible, so as to make the sample paved. Cover the cover and place in on the crucible holder. If samples for determination is less than 6, then place empty crucibles on the holder to fill the vacancy.6 Calculation of coke’s fixed carbon6.1 Calculate the coke’s air dried basis fixed carbon, according to equation (8).7 Determination method of automatic industrial analyzerDetails are shown in Appendix A. This method shall not be regarded as arbitration method.8 Test reportTest report shall contain the following items. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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