FAQ

Material Characteristics and Grinding BehaviorTalc has a Mohs hardness of 1 and a layered (platy) crystal structure. It fractures easily but tends to form flakes rather than equiaxed particles. This affects coating performance, as plate-like particles improve barrier properties and smoothness. Feed

Material Characteristics and Grinding BehaviorTalc has a Mohs hardness of 1, making it one of the softest industrial minerals. It is highly platy and exhibits good lubricity, which reduces grinding resistance but can affect classifier efficiency due to particle adhesion. Feed size is typically below

Material Characteristics and Grinding BehaviorBentonite has a Mohs hardness of 1–2 and is highly plastic due to montmorillonite content. It is not purely brittle; under pressure it can smear and agglomerate, especially when moisture exceeds 8–10%. Feed size is usually below 20–30 mm. Drying is of

Material Properties and Grinding RequirementsCalcium carbonate (CaCO₃) has a Mohs hardness of around 3, with brittle fracture behavior, making it suitable for grinding by compression and shear. Feed size is typically below 20–30 mm after crushing. Moisture should be controlled under 3% to avoid ag

Dolomite Properties and Grinding BehaviorDolomite has a Mohs hardness of 3.5–4, slightly harder than limestone but still brittle and suitable for compression grinding. It breaks efficiently under roller pressure with low energy loss. Typical feed size is below 30–40 mm after crushing, and moisture

Material Characteristics and Grinding BehaviorLimestone typically has a Mohs hardness of 3–4, making it a soft to medium-hard, brittle material. It fractures easily under compressive and shear forces, which favors roller-based grinding systems. Feed size is usually below 30–50 mm after primary cru

Why is limestone relatively easy to grind?Limestone is a soft to medium-soft material, usually around Mohs 3, with good brittleness and low abrasiveness. That means the grinding load is moderate and wear on rollers, rings, and liners is normally lower than with silica-rich stone. In most plants, cru

Why is a Raymond mill usually the best fit at 6 TPH?At 6 TPH, barite grinding is in the middle range where stable fineness and simple operation matter more than very large installed power. Barite is brittle, with typical Mohs hardness of 3 to 3.5, so it breaks well under roller and ring compression.

What makes barite suitable for drilling powder production?Barite is mainly used in drilling mud as a weighting agent, so the mill choice must support stable fineness, low contamination, and steady throughput. The mineral is relatively brittle, with typical Mohs hardness around 3 to 3.5. It is not di

What makes quicklime difficult to grind?Quicklime, or CaO, is brittle and usually around Mohs 3 to 4, so breakage itself is not the main problem. The real issue is moisture. Quicklime reacts with water and absorbs humidity from air, which can cause hydration, agglomeration, and heavy buildup in duct

Why is an ultra-fine mill preferred for 800 mesh calcite?Calcite is a relatively soft mineral, usually around Mohs 3, with good brittleness and low abrasiveness. That makes it easy to grind, but 800 mesh is already in the fine powder range, so the key issue is not breakage alone. The real requiremen

How does talc behave in grinding?Talc is soft, typically around Mohs 1, with good natural grindability but strong plate-like cleavage. That means it breaks easily, yet it can produce flaky particles and coating inside the mill if feed moisture is too high. In practice, dry feed below 1% moisture is