Principles of Plasma-Rock Interaction
Rock thermal conductivity: Dense rocks like basalt require higher energy input. Plasma velocity: High-speed jets remove molten material for continuous cutting. Mineral composition: Quartz-rich rocks melt at ~1,700°C, while carbonates decompose at lower temperatures.
Rock-Type-Specific Cutting Characteristics
High melting points (1,200–1,400°C) require sustained high-energy plasma. Coarse-grained varieties may fracture unevenly under thermal stress.
Softer and more porous, allowing faster cutting speeds. Carbonates (e.g., limestone) may calcine, releasing CO₂.
Variable reactivity due to mineral alignment and crystallinity. Intermediate cutting difficulty between igneous and sedimentary types.
Industrial Applications and Limitations
Equipment wear: Nozzle erosion accelerates with abrasive rock dust. Cost inefficiency: Operational expenses often prohibit large-scale use.
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