The principles and major technological operational conditions of the thermochemical method, i. e. roasting digestion classification, have been presented in this paper.
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。
The roasting and leaching principles of the process, the technological flow chart, the technical indexes and its application in production are discussed.
介绍和讨论了新工艺的焙烧和浸出原理、工艺流程、各项指标和在生产中的应用。
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