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مرحله اول جهت هرگونه عملیات فرآوری، بخش خردایش و طبقه بندی مواد معدنی می باشد که نوع و میزان خردایش نیز خود از مطالعات قبلی صورت گرفته بر روی ماده مشخص می شود. روش های استحصال مواد معدنی بعد از مرحله خردایش و طبقه بندی بسته به نوع و عیار ماده معدنی به دو دسته کلی پیرومتالورژی و هیدرومتالورژی تقسیم می شود.
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یک پیام ارسال کرد