Sandustry Lava Guide: Infinite Lava, Heat & Power Loops
THERMAL POWER BLUEPRINTLava is the strongest heat source in Sandustry. Once ignited from Cinder and stabilized into a 1200°C thermal basin, it acts as an infinite, non-depleting heat engine that roasts Slag into Gold, drives zero-power geothermal steam elevators, and creates closed-loop water generators.
How to Make Infinite Lava from Cinder
Do NOT attempt to pipe natural Lava across the map. Instead create self-sustaining pools on-site:
- Mine subterranean Scoria blocks to obtain Cinder pebbles.
- Build an enclosed 4x4 basin with heat-resistant Granite or Ceramic tiles.
- Drop 16 Cinder pebbles into the basin and blast them with your Flamethrower.
- Cinder melts past its 650°C ignition threshold and liquifies into perpetual 1200°C Liquid Lava!
The Geothermal Steam Elevator
Dripping single drops of Water onto Lava instantly flashes into Steam (Density -20).
- • Steam rises automatically through vertical chimneys to the ceiling of your factory.
- • Placing Cryoblaster cooling vents at the top re-condenses steam into liquid water.
- • Result: Free vertical water transport with zero energy or pump costs!
Update #3 “Hungrier Lava” Thermodynamics & Buffer Sizing
In Early Access Update #3, the developers introduced “Hungrier Lava” mechanics: cold solids (such as incoming Sand, Sandstone, or raw Slag) absorb heat directly from the surrounding liquid lava pool. If your thermal reservoir is too small, cold items drop the fluid temperature below 600°C, causing the lava to quench and solidify back into useless Scoria!
Never operate a 1x1 or 2x2 lava basin. Always build a minimum 4x4 thermal core (16 liquid units). The thermal inertia of 16 units ensures continuous melting even during heavy conveyor surges.
Surround your basin with non-conductive blocks (Ceramic, Obsidian, or Refined Granite). Porous sand or sandstone walls leach heat into the surrounding crust and risk structural melting.
Position a single Flamethrower on a thermostat logic gate pointed at the basin floor. If fluid volume drops below 14 units, the Flamethrower fires automatically to melt incoming Cinder.
1200°C Perpetual Geothermal Steam & Water Generator
Struggling with water supply or energy-hungry pumps? This closed-loop geothermal generator exploits the density difference between liquid Water (100) and Steam (-20) to generate infinite vertical lift and zero-loss water recycling:
Because zero water mass is consumed during phase change, this setup produces a 100% water balance while elevating fluids up to 30 vertical blocks without a single mechanical pump.
Automated Slag Roasting & Gold Reclamation Loop
Raw Slag (density 135) is the most common waste byproduct of early mining and smelting. Instead of discarding it, route Slag across an active Lava heat channel:
Because Slag (135) floats on Sand (150) and Lava (140), it skims smoothly across the surface without sinking.
Passing over the 1200°C thermal bed roasts raw Slag into Burnt Slag (density 140) in exactly 2.0 seconds.
Feeding Burnt Slag into a Kinetic Press yields 15% high-grade Gold flakes plus Bio-Spores for Lumling farming.
♨️Infinite Heat Sources in Sandustry
RENEWABLE ENERGYOnce you establish a 4x4 Lava basin, it becomes a permanent, infinite heat source that never depletes. Here are the three renewable heat methods ranked by efficiency:
Lava Basin (Permanent)
Create a sealed Cinder pool → ignite with Flamethrower → Lava never expires. Infinite heat with zero ongoing resource cost.
Flamethrower Inline
Place Flamethrowers along conveyor lines to continuously roast passing materials. Requires Burnt Residue fuel input.
Geothermal Steam Loop
Drip water onto Lava → Steam rises (Density -20) → cool with Cryoblaster → recycle 100% water. Infinite closed-loop thermal elevator.
💡 Pro tip: Combine all three methods in a single vertical shaft — Lava at the bottom heats water into steam, Flamethrower roasts Burnt Slag mid-shaft, and Cryoblaster captures steam at the top. See the Water Guide for flood prevention.
⚠️ Crucial Lava Containment Rules
Frequently Asked Questions
How do I create infinite lava in Sandustry?
Mine Scoria blocks from deep underground to obtain Cinder pebbles. Place the Cinder in an enclosed 4x4 heat-resistant basin and ignite it with a Flamethrower. Once melted past its thermal threshold, it converts into self-sustaining Liquid Lava that never burns out.
What changed with lava in Update #3 (Hungrier Lava)?
In Update #3, developers introduced 'Hungrier Lava' mechanics where cold blocks absorb thermal energy faster. Lava pools smaller than 4 liquid units will freeze back into Scoria if fed cold solid materials too quickly. A minimum 4x4 pool buffer (16 liquid units) is now required for uninterrupted thermal operations.
How do I build a geothermal steam water generator in Sandustry?
Position a regulated water nozzle above a 1200°C Lava basin. Dripping single drops of water flashes them into rising Steam (density -20). The steam ascends a 12-block vertical chimney into a cold condensation ceiling, re-liquefying into pure water for a 100% closed-loop perpetual water generator.
How does slag roasting into gold work?
Raw Slag (density 135) floating across a 800°C+ lava surface roasts into Burnt Slag (density 140) in approximately 2.0 seconds. Crushing Burnt Slag in a Kinetic Press yields a 15% high-grade Gold recovery bonus plus Bio-Spores.
How do I cool lava back into solid stone?
Spray the lava pool with a Cryoblaster or drop Snow/Ice directly into the basin. Quenched lava instantly solidifies into Scoria blocks, which can be re-mined for a 100% reversible thermal loop.
Related Sandustry Guides
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