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GB/T 2007.1-1987: General rules for the sampling and sample preparation of minerals in bulk -- Sampling by manual method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Similar standardsGB/T 2007.1-1987: General rules for the sampling and sample preparation of minerals in bulk -- Sampling by manual method---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/GBT2007.1-1987 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA UDC 622-3.543.05 Replacing GB 2007-1980 General Rules for the Sampling and Sample Preparation of Minerals in Bulk Sampling by Manual Method APPROVED ON. DECEMBER 15, 1987 Implemented on: OCTOBER 01, 1988 Approved by. National Bureau of Standards Table of Contents1 Scope of Application... 3 2 Normative References... 3 3 Terms and Definitions... 3 4 General Rules... 6 5 Sampling... 7 Additional Information... 14 General Rules for the Sampling and Sample Preparation of Minerals in Bulk Sampling by Manual Method1 Scope of ApplicationThis General Rule is applicable to the selection of samples for the inspection the chemical composition, water content, particle size and other physical items of batches of fluorspar (i.e., fluorite), alumina, talc, manganese ore, iron ore, chromium ore in bulk. Other bulk mineral products such as. barite, magnesia, feldspar, clay, plaster, limestone, dolomite, magnesite, etc. can also be implemented by reference. When formulating a manual sampling method standard for a particular bulk mineral product, this general rule should be used as a guiding document.2 Normative ReferencesGB 2007.2 General Rules for the Sampling and Sample Preparation of Minerals in Bulk - Manual Method of Sample Preparation GB 2007.3 General Rules for the Sampling and Sample Preparation of Minerals in Bulk - Experimental Method for Evaluation of Quality Variation GB 2007.4 General Rules for the Sampling and Sample Preparation of Minerals in Bulk - Experimental Methods for Checking the Precision and Bias GB 2007.5 General Rules for the Sampling and Sample Preparation of Minerals in Bulk - Experimental Method for Checking the Bias of Sampling GB 2007.6 General Rules for the Sampling and Sample Preparation of Minerals in Bulk - Determination of Moisture Content-Heat Drying Method GB 2007.7 General Rules for the Sampling and Sample Preparation of Minerals in Bulk - Determination of Moisture Content-Heat Drying Method3 Terms and Definitions3.1 Manual sampling. A method of using manual sampling tools (including the use of mechanical aids) to collect incremental samples to form duplicate samples and bulk samples. 3.2 Batch. A certain mass of ores that are processed or produced under the same assumptions. 3.3 Delivery batch. A batch of bulk ore of the same specification that is delivered at one time is regarded as a delivery batch, which may consist of one or more batches. 3.4 Lot or delivery lot. The mass of the ores that constitute a batch or a delivery batch. 3.5 Basic lot. The minimum mass of a batch ores that is specified in the sampling standard. 3.6 Incremental sample. A sample that is taken from a point or a part of a delivered batch of ore according to the specified mass. 3.7 Duplicate sample. A sample that is composed of two or more incremental samples of a delivered batch of ore or after crushing and shrinking them one by one. 3.8 Bulk sample. A sample that is composed of all the incremental samples or all the duplicate samples of a delivery batch, or after crushing and shrinking them one by one. 3.9 Specimen. A sample that is prepared from each incremental sample, duplicate sample or bulk sample according to the specified sample preparation method for determination of particle size, moisture content, chemical composition or other physical properties. 3.10 Maximum particle size. the sieve hole size at the sieve residue of about 5%. NOTE. The maximum particle size of the delivery batch may be estimated based on past experience or through tests, and may also be estimated by visual inspection. 3.11 Particle size distribution. A group of particles of a certain mass divided by particle size, which is expressed by a mass percentage. 3.12 Stratified sampling. Divide the delivery batch into several layers, and take sample from different layers according to the mass ratio. 3.13 Systematic sampling. Take incremental samples from a delivery batch at a certain time or mass interval. The initial incremental samples are randomly sampled from the first interval. 3.14 Two-stage sampling. First select the first-stage sampling unit from the delivery batch; and then take incremental samples from the selected first-stage unit. 3.15 Error. The difference between the measured value and the true value. 4.7 When the delivery lot is large, the number of sampling units shall be calculated according to 3.24.Each sampling unit shall be sampled and measured separately; and the results of each sampling unit shall be weighted and averaged according to the mass as the inspection result of the delivery batch. 4.8 The component analysis samples shall be kept properly for at least 6 months as needed for verification. 4.9 Pay attention to safety operation during the entire sampling process.5 Sampling5.1 General procedures for manual sampling 5.1.1 Verify the sampling unit and its mass of the delivery batch or batch. 5.1.2 Determine the usage of the sample and the quality characteristics items to be inspected. 5.1.3 Determine the amounts of incremental samples and the capacity of the required sampling tools according to the maximum particle size. 5.1.4 Determine the quality fluctuation type of the delivery batch and the number of incremental samples that are required to achieve the specified sampling precision. 5.1.5 When using systematic or stratified sampling, determine the minimum number of incremental samples to be taken from the delivery batch. When using two-stage sampling, first determine the number of trucks to be taken from all trucks; and then take the incremental samples from the selected trucks. 5.1.6 In the systematic sampling method and the stratified sampling method, the interval of each incremental sample shall be determined according to time or mass. When sampling trucks, the interval of each incremental sample shall be determined on the basis of mass. 5.1.7 Decide on the sampling location and the method of taking incremental samples. 5.1.8 Determine the combination method of the incremental samples, and then compose duplicate samples or bulk samples as required. 5.1.9 The incremental samples that are obtained according to the method of this general rule shall be prepared according to GB 2007.2. 5.2 Sampling tools a. Pointed steel spade; The calculated number is the minimum number of increment samples, which may only be increased but not reduced. For samples with unknown quality fluctuations and particle size tests need to be conducted, the number of increment samples shall be taken according to the large quality fluctuations. When the sample is used to determine more than one quality characteristics, the number of incremental samples shall be taken according to the large quality fluctuations during the sampling period. 5.3.2 The calculation of the number of incremental samples that shall be taken when the lot is increased. Where. n1 – the number of incremental samples that shall be taken when the lot is increased; n – the number of incremental samples that shall be taken from the basic lot specified in the sampling standard; Q – actual lot, in t; Q1 – basic lot, in t. 5.4 The amounts of incremental samples Determine the mass of each incremental sample according to the maximum particle size. 5.4.1 The taken amounts of incremental samples shall be approximately equal; and their mass variation shall be less than 20% in terms of the coefficient of variation CV. 5.4.2 When the taken amounts of incremental samples can’t be roughly equal (CV >20%), each incremental sample shall be prepared separately and measured separately; or in the appropriate sample preparation stage, when the masses of the divided incremental samples are approximately equal, which may be combined into duplicate samples or bulk samples. NOTE. The number and amounts of incremental samples to be taken for various ores shall be implemented in accordance with the provisions in the ore sampling standards. When the calculated sample mass is less than the required test sample, the number and amounts of incremental samples shall be increased. 5.5 The method of composing a bulk sample or a duplicate sample Any one of the following methods may be adopted as required (see Figures 2~4). fixed interval has been finished, while the loading, unloading, processing or weighing of the ore is still in progress; then the incremental samples shall be continued to take at the original interval until the movement of entire batch of ore is completed. If sampling from a stopped conveyor belt, take the incremental samples from the specified location along the direction of running, the length of which shall be greater than three times the maximum particle size and the entire width and thickness of the ore stream. If sampling from a moving conveyor belt, the entire width and thickness of the ore stream may be taken from the dropping position. If sampling during the loading and unloading or stacking processes by grabs, slings, forklifts and other tools, samples shall be taken on the newly exposed surface during loading and unloading or stacking; or samples may be taken from loading and unloading tools; and the sampling points shall be evenly distributed in all parts of the whole batch of ore, not only its surface or a certain part. The diameter of the sampling point is about 3 times the maximum particle size, but no less than 100mm. The particle size ratio of the taken incremental sample shall be consistent with that of the sampling interval or sampling location. The particle size ratio of the taken bulk sample shall be roughly consistent with the particle size distribution of the entire batch of ore. 5.6.2 Stratified sampling method During the loading and unloading and processing of a batch of ore, samples are taken in several layers (no less than three layers). According to the mass of each layer, the incremental samples are taken from evenly-distributed points on the newly-exposed surface in proportion. At the same time, attention must be paid to the particle size ratio so that the particle size ratio of the incremental samples in each layer is consistent with the particle size distribution of the ore in that layer; and the range of sampling points is the same as that in 5.6.1. The number of incremental samples taken from each layer shall be calculated as per Formula (4). (if there is decimal value, it shall be rounded off to an integer) Where. n1 – the number of incremental samples that shall be taken per layer; n – the specified number of incremental samples; ......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 2007.1-1987 be delivered?Answer: The full copy PDF of English version of GB/T 2007.1-1987 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 2007.1-1987_English with my colleagues?Answer: Yes. 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