6名学生在参观学习间坠落浮选槽死亡，涉事公司2月发文称换过地面格筛板

Group 1 - The core incident involved six students from Northeast University who fell into a flotation tank at China National Gold Group's Inner Mongolia Mining Co., resulting in their deaths and one teacher being injured [1] - Following the incident, China National Gold expressed deep condolences for the victims and initiated an emergency response plan, promptly reporting to local government authorities [1] - The flotation tank is a critical component in mineral processing, utilizing physical and chemical principles to separate valuable metal particles from crushed ore, posing significant safety risks if proper protocols are not followed [2][6] Group 2 - The flotation process is essential for the processing of iron ore, molybdenum, and tungsten, and issues often arise from non-compliance with standard operating procedures and inadequate safety management [2] - The Uunugtu Mountain copper-molybdenum mine is a significant project for China National Gold, known for its technological innovations, including the use of the largest flotation machines in the world [2] - China National Gold's Inner Mongolia Mining Co. has previously emphasized safety in production, implementing strict operational protocols and regular safety training to minimize risks [6]