Hard Rock Crusher Plant - Jaw Crusher Plant | APTThis hard rock crusher plant is a jaw crusher & concentrator designed to crush, process, clean & gravity recover minerals in clean, hard rock ore bodies. . our high standards of quality. Crush hard rock benefits. There is no need for screens as they are built in. SpecificationsReviewsRelated ArticlesView FlyerFlowsheets.hard rock crushers specifiions, QJ331 jaw crusher Technical specification sheet - HubSpotEnhanced fuel economy with emissions reduced by up to 45% for lower cost of ownership, and reduced carbon footprint. These new features are aimed at ensuring the QJ331 is now as user and environmentally focused as it is productive and versatile. The. QJ331 is designed to be equally productive in both hard rock and.