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GB/T 1997-2008: Coke -- Sampling and preparation of samples 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 1997: Historical versions
GB/T 1997-2008: Coke -- Sampling and preparation of samples---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/GBT1997-2008GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.160.10 H 32 Replacing GB/T 1997-1989 Coke - Sampling and preparation of samples Issued on. DECEMBER 06, 2008 Implemented on. OCTOBER 01, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 General... 5 5 Sampling... 7 6 Preparation of coke samples for industrial analysis... 11ForewordThis Standard replaces GB/T 1997-1989 Coke - Sampling and Preparation of Samples. Compared with GB/T 1997-1989, this Standard has the following main changes. -- Revise the format of this Standard; -- Revise the terms and definitions of this Standard and add English names; -- Properly revise the safekeeping and reserve time of samples. This Standard was proposed by China Iron and Steel Industry Association. This Standard shall be under the jurisdiction of National Steel Standardization Technical Committee. Drafting organizations of this Standard. China Metallurgical Information and Standardization Institute, Shougang Company Limited AND Sinosteel Anshan Research Institute of Thermo-energy Co., Ltd. Main drafters of this Standard. Sun Wei, Xi Wanze, Zhu Mingsan and Zhang Jinying. This Standard replaces the following previous standards. - GB 1997-1980, GB/T 1997-1989. Coke - Sampling and preparation of samples1 ScopeThis Standard specifies the terms and definitions in respect of sampling and preparation of coke samples, the sampling place, house, equipment-tools, as well as sampling and preparation of samples for industrial analysis and physical properties test. This Standard is applicable to the sampling and preparation of coke samples for industrial analysis and physical properties test.2 Normative referencesThe following standards contain the provisions which, through reference in this Standard, constitute the provisions of this Standard. For dated references, subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Standard. GB/T 2007.5 General rules for the sampling and sample preparation of minerals in bulk - Experimental method for checking the bias of sampling3 Terms and definitionsTerms and definitions determined in GB/T 9977 as well as the following ones apply to this Standard. 3.1 Lot and batch Coke of same specification at same delivery shall be deemed as one lot, and the mass of one lot of coke is called batch. 3.2 Basic lot It means the specified minimum batch. 3.3 Share sample It means the coke sample obtained by sampling tool when it works one time at one part of one lot of coke (continuous times available for manual sampling).4 General4.1 Moisture sample 4.1.1 After moisture sampling, it shall be immediately put into a corrosion-resistant sample storage barrel with a sealed cover or other watertight sealed container. Tightly cap the barrel or container after each share sample is put in place. 4.1.4 For obvious damp samples, when the determination results are affected during the preparation of samples, the samples and the container shall be weighed together. Spread the samples in a thin layer on a steel plate in a warm and well-ventilated room for air drying; or put the samples into a large oven for incomplete drying before natural cooling. Weigh the container and the dried samples. 4.1.5 The precision of weighing apparatus shall be proper. The maximum capacity of the weighing apparatus shall not exceed 5 times of the sample mass; the minimum division value shall be less than 1/1000 of the maximum capacity. 4.1.6 The total precision of this Standard in sampling, preparation of samples and determination shall be ±1.0% (absolute value) when the degree of confidence is 95%. The total precision of coke of which the moisture is over 10% shall be ±10.0% (relative value). 4.2 Quantity and mass of share sample The quantity and mass of share sample listed in this Standard shall be the minimum ones that are required to reach specified sampling precision. When the actual lot is less than the basic lot, the quantity and mass of share sample shall not be reduced progressively at the actual lot-basic lot proportion.5 Sampling5.1 Sampling tools 5.1.1 Long-handle sampling shovel Specification of long-handle sampling shovel is shown in Table 1 and Figure 1. 5.1.2 Sample storage barrel The barrel mouth shall be tightly connected to the cover. It is made of nonabsorbent and corrosion resistant material. 5.2 Sampling place 5.2.1 The transfer point from coking plant convey belt to iron-making plant convey belt. 5.2.2 The coke falling point of the coke bin or discharge spout. 5.2.3 The transfer point of loading and unloading truck, ship or over-casting convey belt. 5.2.4 Different layout points in the truck, ship or coke pile during loading and unloading. 5.2.5 On the convey belt for transporting coke. 5.3 Batch 5.3.1 Basic lot is 500 t. During the daily production, quantity of coke transported per shift shall be regarded as a batch; if quantity of coke transported per shift is less than 200 t, then the quantity of coke transported per day shall be regarded as a batch. 5.4 Determination of quantity and mass of share samples 5.4.1 The minimum quantity of share samples of one lot of coke shall be determined in accordance with Table 2; for coke batch that is greater than 500 t, the quantity of share samples shall be increased according to the method specified in 4.2.The quantity shall be increased by 1.3 times for ship and large-pile sampling. 5.5 Sampling in coke flow 5.5.1 During the coke transporting by belt conveyer, the interval of share sampling shall be determined according to the batch and the quantity of share samples of each batch. 5.5.2 Sampling at coke bin or discharge spout The sampling at coke bin or discharge spout is the same as that in coke flow (5.5.1 a)). 5.5.3 Sampling of loading and unloading truck, ship or over-casting by adopting belt conveyer is the same as that mentioned in 5.5.1.However, if there is no conditions to install a mechanical sampling funnel, sampling shall be conducted as specified in 5.5.4. 5.5.4 Other sampling methods in loading and unloading truck, ship or cover-casting. 5.5.4.3 Sampling in ship Sampling in ship shall be also conducted during the loading and unloading. Divide the coke stored in the freight house into several sampling layers. The upper sampling layer is 0.1 m ~ 0.2 m away from the top;6 Preparation of coke samples for industrial analysis6.1 House, equipment-tools 6.1.1 Preparation room Preparation room shall include preparation of samples (crush, mix, divide, screen, etc.), storage of samples, drying, etc. The room shall be large and bright enough without being affected by rain or wind or foreign dust. It shall have dust-proof equipment. 6.1.2 Crusher Crusher applicable to preparation of samples includes jaw crusher, roll-type crusher and other sealed grinders. Theses equipment can be used as long as their material and ratio of crushing meet corresponding requirements, without contamination and easy to clean. 6.1.3 Divider The inside surface shall be smooth. It shall adopt sealed type to prevent loss of moisture and powder sample. Cone type, rotary type or dichotomous type shall be adopted. Before use, the divider shall be calibrated according to the provisions in GB/T 2007.5.The precision calibration result shall comply with corresponding requirements. 6.1.4 Screen 6.1.4.1 Perforated screen size. 60 mm×60 mm. 6.1.5 Sampling shovel, sample tray, brush, weighing apparatus, thermostatic drier, etc. 6.2 Preparation of samples 6.2.1 Preparation of total moisture samples Crush all coke sample to be less than 60 mm. The sample mass shall not be less than 40 kg after fully mixing and dividing. Crush the sample to be less than 13 mm. Divide the samples into two equal shares. One of them shall be used to divide special samples for determining moisture, and the other shall be used to divide samples for other analyses. Mixing method is described in 6.3.1, and division method is described in 6.3.2. 6.2.2 Preparation of analysis samples Evenly mix the other sample that has been crushed and is less than 13 mm, and the splitting shall not be less than 4 kg. Crush its size to be less than 6 mm, and the evenly mixed splitting shall not be less than 2 kg. Crush its size to be less than 3 mm, and the evenly mixed splitting shall be 1 kg. Completely crush 1 kg of sample to 1 mm. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 1997-2008 be delivered?Answer: The full copy PDF of English version of GB/T 1997-2008 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 1997-2008_English with my colleagues?Answer: Yes. 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