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Quick AnswerFor hard-rock gold, the secondary crusher has to survive silica. Most hard-rock gold deposits carry enough quartz that abrasiveness - not just compressive strength - drives liner wear and downtime. That is why a cone, and specifically a single-cylinder hydraulic cone (CS·CH series), tends to be the right secondary for this ore: the laminated crushing chamber handles abrasive feed without eating blow bars, the discharge setting stays put under load, and a closed circuit holds the mill...
Quick Answer Malaysian granite is typically hard and abrasive, and the tropics bring heavy rain - so choosing a granite crushing plant comes down to three things: match the machines to "jaw primary + cone secondary (+ VSI shaping/sand)", watch feed clay and moisture plus product grading, and decide early whether to build stationary or go mobile. For large, long-life, steady quarries, a stationary crushing line (jaw + cone + screen + VSI) is cheapest per ton. For scattered faces, follow-the-ore w...
Quick AnswerGypsum (CaSO4·2H2O) runs Mohs 1.5-2 - soft and heat-shy; push grinding past ~120°C and it dehydrates to hemihydrate, which gives false set downstream. For 325-2500 mesh high-quality gypsum powder, the HGM three-ring micro-powder mill is the right tool: ring-roller pulverizing is gentle on a soft rock, and the air circuit with the classifier keeps temperature below the dehydration line, yielding a fine, well-shaped powder instead of the flakes a ball mill tends to make. A single jaw (...
Quick AnswerDolomite is calcium-magnesium carbonate (CaMg(CO3)2), a touch harder than limestone at Mohs 3.5–4. A practical plant runs jaw crush → impact medium crush → de-iron → grinding, with the mill picked by end use. YGM high-pressure mill covers 80–325 mesh for agricultural and base filler stock; LM vertical mill handles high-tonnage glass and ceramic feed; HGM micro-powder mill reaches 325–2500 mesh for feed-grade and coating powder. Because dolomite feeds glass and refractory lines, iron ...
Quick AnswerIron ore is hard, abrasive and often wet, so you crush it in stages with compression crushers, not impact. A typical line runs: feed -> grizzly feeder (ZSW, strips clay and fines) -> jaw crusher (primary, 6CX/PE) -> screen -> cone crusher (secondary, multi-cylinder CP) -> screen -> cone (tertiary, single-cylinder CS/CH or Symons CSV) -> screen -> mill-feed product, usually locked at 0-12 mm or 0-15 mm. Jaw plus cone wins on iron ore because compression wears far slower than impact on...
Quick AnswerCalcite is the natural crystalline form of calcium carbonate, soft (Mohs ~3) — wear is not the main issue, the real test is how fine you grind and how accurate the classification is. For 80–325 mesh base filler, a YGM high-pressure mill does the job; for 200–400 mesh at volume, an LM vertical roller mill; for 325–2500 mesh ultrafine, an HGM three-ring mill; for high-end ultrafine above 1250 mesh, an LUM ultrafine vertical mill saves more power. Pre-crush lumps below 20 mm with a jaw ...
Quick AnswerCalcium carbonate is soft (Mohs ~3), so wear is not the issue — the real question is how fine you need it and how accurately you can classify it. Rule of thumb: 80–325 mesh filler, go YGM high-pressure suspension mill; 200–400 mesh at volume, go LM vertical roller mill; 325–2500 mesh superfine, go HGM three-ring micro powder mill; above 1250 mesh ultrafine, LUM ultrafine vertical mill saves more power. Pre-crush lumps below 20 mm with a jaw crusher (6CX/PE), dry-grind and let the cla...
As urbanization accelerates and urban renewal projects multiply, construction waste generation continues to climb. In China alone, annual construction waste output reaches approximately 3.55 billion tonnes, accounting for over 40% of total municipal solid waste. Construction waste, however, differs fundamentally from natural ore: it is complex in composition, scattered in distribution, limited in volume per site, and highly variable in particle size and strength. These characteristics create sig...
1. Why Basalt Demands Special Crusher Selection Basalt is a dense volcanic extrusive rock with a Mohs hardness of 5 to 7, compressive strength reaching 100 to 300 MPa, and SiO2 content typically between 45% and 52%. The combination of high hardness, high abrasiveness, and high toughness makes basalt one of the most challenging materials to crush in the aggregate industry. Choosing the wrong crusher leads to rapidly consumed wear parts, frequent downtime for component replacement, and operating c...
1. Why Aggregate Shape MattersAggregate shape is one of the most critical factors determining the performance of concrete and asphalt mixtures. Cubical particles pack tightly within the mix matrix, maximizing inter-particle contact area and friction, which directly translates to higher compressive strength and improved structural stability. Conversely, flaky or elongated particles (those with a length-to-thickness ratio exceeding 3:1) create a bridging structure within the mix, increasing void c...
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