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化学选矿是处理难选磷矿石的有效方法。本文介绍了热化学方法，即焙烧－消化－分级方法的原理及主要工艺操作条件。对湖北大峪口磷矿的白云质磷块岩进行热化学选矿试验，取得了满意的结果
Chemical beneficiation is an effective method to deal with refractory phosphate rock. This article describes the thermochemical method, that is roasting - digestion - grading principle and the main process operating conditions. Thermochemical beneficiation tests were carried out on the dolomitic phosphate rock of the Dayukou phosphate rock in Hubei Province and satisfactory results were obtained