application this series of crushers is widely applied in metallurgical, construction, road building, chemical and phosphatic industry. it is suitable for hard and mid-hard rocks and ores, such as iron ores, copper ores, limestone, quartz, granite, gritstone, etc. type of the crushing cavity is decided by the application of the ores. standard type is for pyz (secondary crush); middle type is for pyd (tertiary crush); short-head type is for primary and secondary crush.