GB/T 4291-2017

Active

Synthetic cryolite

冰晶石

Standard Type

GBT

ICS

71.100.10

CCS

D59

Status

Active

Issue Date

2017-07-12

Implementation

2018-02-01

Centralized Committee

中国有色金属工业协会

Issuing Authority

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

Application Summary AI generated

GB/T 4291-2017 specifies the classification, technical requirements, test methods, inspection rules, and packaging for synthetic cryolite used primarily as a flux in the aluminum smelting industry. It applies to the production and quality control of synthetic cryolite, which lowers the melting point of alumina in the Hall-Héroult electrolytic process. The standard ensures consistent chemical composition and physical properties for efficient electrolytic reduction in aluminum manufacturing.

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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.