Home / Standards / GB/T 18711-2025 GB/T 18711-2025 Active Test method of magnetite for use in coal preparation 选煤用磁铁矿粉试验方法 Standard Type GBT ICS 73.040 CCS D 27 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A