静水天平测定矿石体重的方法在黔中瓮福地区英坪磷矿与小坝磷矿的应用  

The method of hydrostatic balance to determine the weight of ore and its applicationin Yingping and Xiaoba phosphate mines in Wengfu area,central Guizhou

作　　者：宋小军 巩鑫 郭东杭 欧义 李光春 苏永虎 罗勇军 曾凡祥 孙泽玉 SONG Xiaojun;GONG Xin;GUO Donghang;OU Yi;LI Guangchun;SU Yonghu;LUO Yongjun;ZENG Fanxiang;SUN Zeyu(Geological and Mineral Exploration Institute,Nonferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou,Guiyang 550005,China;Wengfu(Group)Co.,Ltd.,Guiyang 550005,China;Guizhou Fuquan Youfu Phosphorus Chemical Co.,Ltd.,Fuquan 550509,China)

机构地区：[1]贵州省有色金属和核工业地质勘查局地质矿产勘查院,贵州贵阳550005 [2]瓮福(集团)有限责任公司,贵州贵阳550005 [3]贵州福泉有福磷化工有限公司,贵州福泉550509

出　　处：《中国矿业》2021年第S01期456-462,共7页China Mining Magazine

摘　　要：矿石自然状态下利用静水天平上称与下称的称量值各不相同,可以根据阿基米德定律将不同的称量值换算成矿石体积,最后推导出矿石体重公式。避免传统地质方法用量杯或量筒直接测量水体积引起的人为误差,静水天平测定矿石体重需要一定的条件,测定致密性好、遇水化学性质及物理性质稳定的矿石体重,矿石浸没于水中下称时可以选择自然状态下进行裸测;测定致密性差、遇水化学性质及物理性质不稳定的矿石体重,矿石浸没于水中下称时必须蜡封或塑封;以上两种测定矿石体重的方法均具有较高的准确性。可以将静水天平测定矿石体重的方法和原理进一步推广测定致密性差、孔隙度大、遇水化学性质及物理性质稳定岩石的有效孔隙度;测定有效孔隙体积时浸没于水中的岩石只能塑封,而不能蜡封,此类测定方法具有一定的可行性和局限性。黔中瓮福地区英坪磷矿与小坝磷矿满足致密性好、遇水化学性质及物理性质稳定的条件,矿石浸没于水中下称时选择自然状态下进行裸测,是静水天平测定区内磷块岩体重正确的应用。In the natural state of the ore or in the air or water after wax sealing or plastic sealing,the weighing value on the hydrostatic balance is different from the weighing value below.The different weighing value can be converted into the volume of the ore according to Archimedes's law.Finally,the ore weight formula is derived to avoid the human error caused by the traditional geological method of measuring the volume of water directly with a measuring cup or a graduated cylinder.The hydrostatic balance requires certain conditions to determine the weight of the ore,to determine the weight of the ore with good compactness,chemical and physical properties in contact with water,when the ore is immersed in water,the weight can be measured in the natural state,the measurement of poor compactness and chemical properties in water.The weight of the ore with unstable properties and physical properties must be wax-sealed or plastic-sealed when the ore is immersed in water.The above two methods for determining the weight of the ore have high accuracy.The method and principle of the hydrostatic balance to determine the weight of the ore can be further promoted to determine the effective porosity of the rock with poor compactness,large porosity,chemical and physical properties in contact with water.When determining the effective pore volume,the rock immersed in water can only be plastic sealed,and it cannot be sealed with wax.This type of determination method has certain feasibility and limitations.The ore of Yingping and Xiaoba phosphate mines in Wengfu area of central Guizhou meets the conditions of good compactness,chemical and physical properties in contact with water.When the ore is immersed in water,the ore is measured in a natural state,which is a static water balance.Correct application of the weight of phosphorite in the determination area.

关 键 词：矿石体重 有效孔隙度 阿基米德定律 静水天平 磷矿 

分 类 号：P618.41[天文地球—矿床学]