GNR DMK Series Secondary Impact Crusher

The GNR DMK series secondary impact crusher turns primary product into cubical, well-graded secondary aggregate. Capacity 120–500 tph, rotor 1100×1000–1400×2000 mm, feed 800 mm, 160–500 kW. On limestone and low-to-medium abrasive lines it gives ~10:1 reduction and high shape quality. The GNR DMK series secondary impact crusher takes primary product and, with a smaller inlet and close apron setting, breaks it by impact into cubical, well-graded secondary aggregate. On limestone and low-to-medium abrasive lines it delivers high reduction and shape quality. Technical data Working principle Same impact principle as the primary HSI, but with a smaller inlet and breaker plates closer to the rotor, giving finer, cubical product. Stage: secondary/tertiary. Material and application Suitable: limestone, dolomite, soft-to-medium rock, asphalt/C&D recycling — for cubical aggregate and chippings. Not suitable: high-silica granite/basalt/gravel, where a secondary cone is preferred. It can produce slightly flakier grains than a VSI; an added VSI stage raises cubicity. Reduction and wear (TCO) Typical reduction is ~10:1. Wear parts are the blow bars and apron liners: high-chrome for clean abrasion; manganese/martensitic for metal-bearing recycling; ceramic-MMC for long life. As secondary feed is smaller, part life is more predictable than in a primary HSI, and the correct alloy preserves the cost-per-tonne advantage. The DMK is the secondary machine of a complete limestone plant covering crushing, screening, washing and concrete batching, supplied from a single source. S: What does a secondary impact crusher do? C: It turns primary product into cubical, well-graded secondary aggregate. S: What is the reduction ratio? C: Typically ~10:1. S: DMK or a secondary cone? C: DMK for limestone/low-abrasive; cone for granite/basalt/gravel. S: What is the maximum feed size? C: 800 mm across our DMK series. S: How can I get a quote? C: Send us your capacity and material; we provide a project-specific quote and full-plant solution.