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GB/T 46977-2026: Determination of nitrogen, sulfur and phosphorus in foundry reclaimed sand
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| GB/T 46977-2026 | English | 219 |
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Determination of nitrogen, sulfur and phosphorus in foundry reclaimed sand
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Standard similar to GB/T 46977-2026 GB/T 43139 | GB/T 43409 | GB/T 41160 | GB/T 26653 | GB/T 26648 | Basic data | Standard ID | GB/T 46977-2026 (GB/T46977-2026) | | Description (Translated English) | Determination of nitrogen, sulfur and phosphorus in foundry reclaimed sand | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J31 | | Classification of International Standard | 91.100.15 | | Word Count Estimation | 10,118 | | Date of Issue | 2026-01-28 | | Date of Implementation | 2026-08-01 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 46977-2026: Determination of nitrogen, sulfur and phosphorus in foundry reclaimed sand---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.
ICS 91.100.15
CCSJ31
National Standards of the People's Republic of China
Methods for determining nitrogen, sulfur, and phosphorus content in recycled foundry sand
Published on 2026-01-28
Implemented on August 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed and is under the jurisdiction of the National Technical Committee on Foundry Standardization (SAC/TC54).
This document was drafted by. Jinan Shengquan Group Co., Ltd., Henan Feilong (Wuhu) Auto Parts Co., Ltd., and Hebei Yuexin New Materials Co., Ltd.
Building Materials Manufacturing Co., Ltd., Liujing Technology Group Co., Ltd., Jiangsu Wanheng New Materials Technology Co., Ltd., Liuzhou Liujing Environmental Protection Technology Co., Ltd.
Limited Liability Company, Sanmenxia Sunshine Casting Co., Ltd., Sanming Yijun Machinery Casting Co., Ltd., Taigang Alloy (Zhongshan) Co., Ltd., Guangxi Lanzhou
Keyuan Recycling Co., Ltd., Chongqing Changjiang Molding Materials (Group) Co., Ltd., Xixia Feilong Special Casting Co., Ltd., Changluo
(Liaocheng) Intelligent Manufacturing Co., Ltd., Shenyang Foundry Research Institute Co., Ltd. of China Academy of Machinery Science and Technology, Huazhong University of Science and Technology, Beijing Jiaotong University
Shenyang University of Technology, Wuhan University of Engineering, Wuxi Sanfeng Instrument Equipment Co., Ltd., Chengde Beiyan New Material Technology Co., Ltd., Chengde Dongwei
New Materials Technology Co., Ltd., Yingkou Hengyuan Casting Materials Co., Ltd., Henan Jintaiyang Precision Casting Co., Ltd., Zhejiang Sui
Jinte Casting Co., Ltd., Guangxi Jinchuang Auto Parts Manufacturing Co., Ltd., Hebi Xinrong Casting Co., Ltd., Wuhu Honghu Materials
Technology Co., Ltd., Hebei Ruifeng Technology Co., Ltd., Qufu Longxiang Metallurgical Casting Auxiliary Materials Co., Ltd., Hubei Gucheng County Donghua Machinery Co., Ltd.
The company, Yibin Push Linkage Technology Co., Ltd., Ningbo Ligu Machinery Manufacturing Co., Ltd., Cixi Huili Electromechanical Co., Ltd., Shandong Haoxin
Joint-stock company, SAIC Volkswagen Automotive Co., Ltd., Aero Engine Corporation of China, Liyang Wansheng Foundry Co., Ltd., Hangzhou Aircraft Industry Group Co., Ltd.
Fenqi Gas Products Inspection and Testing Co., Ltd.
The main drafters of this document are. Li Na, Li Donghua, Chai Xiufeng, Zhang Feng, Zhu Dongjin, Chen Jie, Ren Wenqiang, Cao Qiao, Liu Guomei, Wang Lifeng, and Li Baoliang.
Li Yuancai, Xue Jiang, Cai Jian, Kong Bing, Du Wenke, Zhang Yancheng, Feng Dashun, Zhang Jianxiong, Zhang Zhiwen, Ruan Jiangang, Wang Ruijin, Wang Lilin, Xu Qingjun
Wu Baocheng, Wan Peng, Luo Yu, Dong Yin, Liu Weihua, Han Jilei, Guo Gao, Ye Hao, Huang Peng, Xiao Yun, Meng Lianzhou, Xu Junqiang, Wang Yan, Han Haitao, Gu Fuhai
Liu Quanrong, Sun Changjian, Lü Jixian, Chen Yihan, Han Yingzhi, Shen Guang, Zhang Huichun.
Methods for determining nitrogen, sulfur, and phosphorus content in recycled foundry sand
1 Scope
This document describes the methods for determining the nitrogen, sulfur, and phosphorus content of recycled foundry sand.
This document applies to resin-regenerated foundry sand (regenerated silica sand, regenerated chromite sand, regenerated magnesium olivine sand, and regenerated spherical ceramic sand).
Determination of nitrogen, sulfur and phosphorus content.
This document does not apply to the determination of nitrogen, sulfur, and phosphorus content in recycled water glass casting sand.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 601 Preparation of Standard Titration Solutions for Chemical Reagents
GB/T 603 Preparation of reagents and products used in chemical reagent test methods
GB/T 5611 Casting Terminology
GB/T 31190 Technical Specification for Collection of Laboratory Waste Chemicals
3 Terms and Definitions
The terms and definitions defined in GB/T 5611 apply to this document.
4.Nitrogen content determination (Kjeldahl method)
4.1 Principle
The nitrogen in the regenerated sand is converted into ammonia through a reaction. The distilled ammonia is absorbed by boric acid solution, and the nitrogen content is determined by acid-base titration.
4.2 Instruments
Instruments for nitrogen content determination.
a) Adjustable temperature electric heating mantle.
b) Kjeldahl nitrogen analyzer. recovery rate (100±1)%.
c) Electronic balance. accuracy 0.01g.
d) Electronic analytical balance. accuracy 0.0001g.
e) Pipette. 10 mL, graduation value 0.1 mL.
f) Burette. 50mL acid burette, graduation value 0.1mL, Grade A.
g) Erlenmeyer flasks. 150mL, 500mL.
h) Condenser. 600mm straight condenser.
i) Graduated cylinders. 50mL, 250mL.
j) Kjeldahl nitrogen determination flask. 500mL.
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