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GB/T 8729-2017: Foundry coke
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 8729-2017	English	139	Add to Cart	3 days [Need to translate]	Foundry coke
GB/T 8729-1988	English	159	Add to Cart	2 days [Need to translate]	Foundry coke

GB/T 8729-2017: Foundry coke

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Foundry coke ICS 75.160.10 H32 National Standards of People's Republic of China Replacing GB/T 8729-1988 Foundry coke Published on October 10,.2017 2018-05-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 8729-1988 "Foundry Coke". Compared with GB/T 8729-1988, the main technical content changes. as follows. --- Modified normative references (see Chapter 2); --- Change the special grade to excellent grade (see Chapter 3); ---Modified "Block Size" to "Granularity"; change the size of >80mm, 80mm ~60mm, and >60mm to >120mm, respectively 120mm~80mm, 80mm~60mm (see Chapter 3); --- Modify the index of crush strength, change the grade from ≥ 85.0 to ≥ 87.0; grade 1 from ≥ 81.0 to ≥ 83.0; grade 2 from ≥ 77.0 ≥ 80.0 (see Chapter 3); --- Modify the falling intensity index, change the superiority level from ≥ 92.0 to ≥ 93.0, the level from ≥ 88.0 to ≥ 89.0, and the level from ≥ 84.0 ≥ 85.0 (see Chapter 3); --- Added Appendix A (see Appendix A). This standard is proposed by the China Iron and Steel Industry Association. This standard is under the jurisdiction of the Technical Committee on Coking Chemistry of the National Coal Chemical Standardization Technical Committee (SAC/TC469/SC3). This standard was drafted. Sinosteel Anshan Thermal Energy Research Institute Co., Ltd. and Metallurgical Industry Information Standards Institute. The main drafters of this standard are Meng Qingbo, Xu Xiuli, Ma Yan, Jiang Yu, Wu Chenglin, Zhan Li, Hou Jinpeng, Zhang Shidong, Tang Shuai, Wang Xiong, and Zheng Jingsui. The previous versions of the standards replaced by this standard are. --- GB/T 8729-1988. Foundry coke

1 Scope

This standard specifies the technical requirements, test methods, inspection rules, transportation and quality certificates for foundry coke. This standard applies to coke used for cupola smelting.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1997 Coke Sample Preparation and Preparation GB/T 2001 coke industry analysis and determination method GB/T 2006 Determination of coke mechanical strength GB/T 2286 Determination of Total Sulfur Coke Content GB/T 4511.1 Determination of true relative density, pseudo relative density and porosity of coke GB/T 4511.2 Determination of Dropping Strength of Coke GB/T 8170 Representation and Determination of Numerical Rounding Rules and Limit Values

3 Technical requirements

3.1 The technical indicators of foundry coke should meet the requirements of Table 1. Table 1 Technical Specifications of Foundry Coke index grade Excellent level 1 Particle size/mm >120, 120~80, 80~60 Moisture (Mt)/% ≤ 5.0 Ash content (Ad)/% ≤ 8.00 ≤ 10.00 ≤ 12.00 Volatile matter (Vdaf)/% ≤ 1.5 Sulfur content (St, d)/% ≤ 0.60 ≤ 0.80 ≤ 0.80 Crushing strength (M40)/% ≥87.0 ≥83.0 ≥80.0 Dropping strength (SI504) ≥93.0 ≥89.0 ≥85.0 Porosity (Ps)/% ≤40 ≤45 ≤45 Coking rate (< 40mm)/% ≤4.0 3.2 The intensity indicators M40 and SI504 can be used as options. When the values of these two indicators are inconsistent, the M40 value is used. 3.3 Moisture (%), volatile matter (%), apparent porosity (%), and pulverization rate (%) are not considered as quality acceptance indicators. 3.4 When there is special demand, the supply and demand sides shall negotiate and settle the matter. ...