... construction, gravel metallurgical and other industries. Apply to iron ore, nonferrous metal ores, granite, limestone, quartzite, sandstone, pebbles and ... cement ,construction ,gravel metallurgical and other industries apply to iron ore ,nonferrous and so on.2. Symons hot ... suitable for hard and mid-hard rocks and ores, such as iron ores, copper ores, limestone, quartz, granite, gritstone, etc.Symons ...