GB/T 4757-2025 English PDFGB/T 4757: Historical versions
Basic dataStandard ID: GB/T 4757-2025 (GB/T4757-2025)Description (Translated English): Methods for the batch-flotation testing of fine coal Sector / Industry: National Standard (Recommended) Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 4757-2013 GB/T 4757-2013: Methods for the batch flotation testing of fine coal---This is a DRAFT version for illustration, not a final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.Methods for the batch flotation testing of fine coal ICS 73.040 D27 National Standards of People's Republic of China Replacing GB/T 4757-2001 Pulverized coal (mud) Standard Test Method for Laboratory flotation unit Issued on. 2013-12-17 2014-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 4757-2001 "pulverized coal (mud) laboratory flotation cell test method", the present standard and GB/T 4757-2001 Compared to the main changes are as follows. --- Modify the normative references (see Chapter 2, Section 2 of the 2001 edition); --- Removed 3.4.3 and 7.5.5 (2001 version 3.4.3 and 7.5.5); --- Modified flotation dosage units (see 6.1.4 and 615, 2001 edition of 6.1.4 and 6.1.5.); --- Deleted Chapter 8 (Section 8, 2001 edition). The standard proposed by China Coal Industry Association. This standard coal by the National Standardization Technical Committee (SAC/TC42) centralized. This standard was drafted. Tangshan Coal Science Research Institute, the world (Tangshan) Co., Ltd. Mining. The main drafters of this standard. Shi Huan, Shi Yingxiang, Cheng Hongzhi, Li Hongqi, Zhang Xiaojun, Wenhua. This standard replaces the standards previously issued as follows. --- GB/T 4757-1984, GB/T 4757-2001. Pulverized coal (mud) Standard Test Method for Laboratory flotation unit1 ScopeThis standard specifies the pulverized coal (mud) laboratory flotation test unit coal samples, test equipment and appliances, and coal flotation test dosage meter Operators, comparability flotation tests and flotation test parameters. This standard applies to bituminous coal and anthracite.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 211 Determination of total coal moisture (ISO 589.2003, NEQ) GB/T 212 industrial analysis of coal (ISO 11722.1999, ISO 1171.1997, ISO 562.1998, NEQ) Determination of calorific GB/T 213 coal (ISO 1928.1995, MOD) GB/T 214 Determination of total sulfur in coal (GB/T 214-2007, ISO 334.1992, NEQ) GB/T 477 coal screening test method (GB/T 477-2008, ISO 1953.1994, MOD) GB/T 30047 pulverized coal (mud) can float assessment method MT/T 180 Effect of Flotation Process Evaluation Method MT/T 808 Coal technical inspection MT/T 320 coal core samples of coal washability test methods3 coal samples3.1 core coal samples collected from coal According to MT/T 320 Chapter 5 takes a predetermined reduction in size of less than 0.5mm sieve product of coal, the quality of less than 1kg. 3.2 or collected from coal seam coal production After according to GB/T 477 for screening tests, taking the natural level were reduced in size and fragmentation level of less than 0.5mm of coal, according to its accounting Coal blending ratio, the quality of not less than 10kg. 3.3 taken from Flotation feed In accordance with the provisions of MT/T 808 Chapter 3, to take not added any flotation flotation reagent into the material, the total mass of less than 10kg. 3.4 laboratory analysis and storage 3.4.1 according to GB/T 211, GB/T 212, GB/T 213 and GB/T 214 standard relevant provisions of the following items (if necessary adaptive When the increase or decrease) in the analysis. Water (Mt, Mad), ash content (Ad), total sulfur (St, d), heat (Qnet, ar). 3.4.2 GB/T 477 provisions small screening tests. 3.4.3 Test dried coal to air dry state, placed in a sealed container and storing, storage place to keep dry, stored for no more than ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 4757-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 4757-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 4757-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 4757-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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