美国云母的开采局限在几个地区的伟晶岩和云母片岩中。伟晶岩经过破碎和研磨后,大部分的片状云母作为主要产品回收。在个别情况下,云母是作为长石和锂辉石的副产品回收的。美国矿山局为此研究出两种浮选法,一种是在酸性介质中用阳离子捕收剂浮选云母,这种方法要求仔细地脱泥,因此,往往会造成细粒云母的损失。另一种方法是在碱性介质中用阴、阳离子捕收剂从经过初步脱泥的伟晶岩矿石中回收细粒云母,这时的脱泥是为除去粘性物料,而又不造成细云母的 American mica mining is limited to pegmatites and mica schist in several areas. Pegmatite after crushing and grinding, most of the flaky mica as the main product recovery. In rare cases, mica is recovered as a by-product of feldspar and spodumene. For this reason, the US Bureau of Mines has developed two flotation methods, one is the use of cationic collectors flotation mica in acidic medium, this method requires careful desliming, therefore, often will cause the loss of fine mica. Another method is to recover the fine mica from the primarily deslimed pegmatite ore using a cation and cation collector in an alkaline medium, in which case the desliming is to remove the viscous material without causing the fine mica of