【摘要】 以改进的连续分级提取方法，分别以去高于水、４％（ＮＨ４）２ＳＯ４水溶液、０．２０ｍｏｌ·Ｌ－１ＨＣｌ溶液、０．２０ｍｏｌ·Ｌ－１ ＮＨ２ＯＨ·ＨＣＬ＋２．０ｍｏｌ·Ｌ－１ＨＣｌ溶液、 ０．３３ｍｏｌ·Ｌ－１柠檬酸钠溶液和０．５０ｍｏｌ·Ｌ－１ＮａＯＨ溶液为提取剂，将南方某类稀土矿中可 提取的非晶态铝相应区分为：水溶态铝（Ｓｏｌ　Ａｌ）、交换态铝（Ｅｘ Ａｌ）、吸附态无机羟基铝（Ｈｙ Ａｌ）、层间相铝（Ｉｎ　Ａｌ）和非 晶态铝硅酸盐（Ｎｃ Ａｌ）；剩下的为层状铝硅酸盐矿物态铝（Ｍｉｎ Ａｌ）。其相应各状态铝含量分别为某中重稀土矿：２．０６ ×１０－５％，０．０３０％，０．２４％，０．４１％，１．１９％，３５．８％和６２．４％。某重稀土矿：２．２４×１０－４％，５．７３×１０－３％，０．１０６％，０．５７７％，０．６１１％，１１．３％， ８５．１％。且Ｍｉｎ Ａｌ＞Ｎｃ Ａｌ＞Ｉｎ Ａｌ＞ＤＣＢ Ａｌ＞Ｈｙ Ａｌ＞Ｅｘ Ａｌ＞Ｓｏｌ Ａｌ．在稀土矿浸出工艺中，进入浸出液的是 Ｓｏｌ ＡＩ和Ｅｘ　ＡＩ．更多还原

【Abstract】 The existing state of aluminum in rare earth ore in southern China could be fractionated into aqueous soluble phase Al(Sol Al), exchangeable Al(Ex Al), absorbed inorgainc hydroxy Al(Hy Al), Fe oxide bounded Al(DCB Al), interlayered Al(In Al) and amorphous noncrystalline aluminosilicate (Nc Al) and mineral Al(Min Al) with deion water, 4% (NH4)2 SO4, 0.2mol/L HCl, 0.5mol NH2 OH. HCl+2mol/L HCI, sodium citrate (0.33mol/L pH7.3) and 0.5mol/L NaOH by an improved sequential extraction method. The corresponding contents of Al in each phase are as follows: 2.06×10-5%, 0.03%, 0.24%, 0.41%, 1.19%, 35.8% and 62.4% for middle heavy rare earth ore; 2.24×10-4%, 5.73×10-3%, 0.107%, 0.577%, 0.611%, 11.27% and 85.06% for heavy rare earth ore respectively. The order of various Al existing state is: Min Al>Nc Al>In Al>DCB Al>Hy Al>Ex Al>Sol Al. In rare earth extraction, the main impurities for southern China rare earth ore are Ex Al and Sol Al.更多还原