摘要
台灣地區已有若干關於天然沸石的產狀、結晶構造、農業應用及利用岩石合成等文獻；但尚無具有經濟開採規模的沉積型沸石礦床。本研究以探討自含沸石原礦中選出沸石精礦，作為未來評估開發的工程資料。海岸山脈之偏僻地區賦有量多、結晶顆粒大、有潛力的沸石礦床。經過粉碎試驗得到沸石顆粒有自然解離傾向，沸石定量分析可經由X光繞射波峰積分強度予以定量，沸石比重約為1.7左右，適用重力選礦。以搖洗桌分選沸石，在150-300 μm顆粒大小範圍，沸石，回收率爲30%，品位50%。由於圍岩大都含有鐵份，因此磁選亦可選出沸石。磁選在600-1400μm顆粒大小範圍，沸石精礦回收率為63%，品位78%。
關鍵字
無資料並列摘要
The occurances, crystalline structures, agricultural applications of natural zeolites in Taiwan, and synthesis of zeolites using local andesite/basalt rocks had been reported in local Journal. However, economically sedimentary type zeolite-deposits have not yet been explored and identified. This investigation attempts to obtain a zeolite products from zeolite bearing rocks by a simple beneficiation operation, thus providing the necessary engineering data for the evaluation of zeolite-deposits in Taiwan. The Tuluanshan sedimentary formations of the coastal range in eastern Taiwan are composed of andesite rock fragments. In natural zeolite, mordenite, the predomainant zeolite mineral, occurs as amygdaloidal crystalline aggregates, in andesite fragments. The zeolite grains are easily liberted by detachment after comminution. A liberation model is derived from combining of grain boundary parting and random fracture between zeolite grain and gangue rock. The quantitative analysis is obtained by internal standard method of X-ray diffraction. The obvious density difference between zeolite(1.7 g/cm^3) and gangue(2.5 g/cm^3) gives an efficient gravity concentration. The recovery and grade of the concentrated product of 150-300 μm fraction are 30% and 50%, respectively. Magnetic separation could also separate zeolite from iron contaminated gangue. The recovery and grade of concentrated product of 600-1400 μm fraction by magnetic separation are 63% and 78%, respectively.