SiO2 rich rocks are of a wide distribution, especially in connection with the pyrite deposits in the Xiangshan pyrite ore district.
宁芜向山—皇姑山地区铁硫矿床中及附近存在大片硅质岩,属热泉沉积的硅华。
Against ground collapse fire zone of sulfide deposit,to spray a new kind of fireproofing agent was brought forward in order to eliminate SO_2 and protect environment.
针对含硫矿床地表塌陷火区,提出了采用防火剂进行喷淋灭火的方案,以期消除SO_2、保护环境。