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🆕 Updated for Eco 14 — “Garbage & Recycling” — this server and these numbers now reflect the new version. What changed →

Byproducts: nearly every recipe now leaves waste behind, so recipe pages list byproducts alongside ingredients.
Garbage & recycling: waste sorts from mixed garbage down to pure materials, and can be recycled back into stock.
Pollution has four kinds: acid rain, chemical, soil and heavy mineral, each settling into the ground differently. Pollution guide →
Modules reworked: upgrades are now Basic / Advanced / Modern / Specialty, one per slot, driving the same bonus system as talents. Module guide →
Fresh water: machines need it — water drawn from the ocean has to be desalinated first.

The character calculator has been updated for these changes. Read the garbage & recycling guide →

Blast Furnace

WorldObject

A superior replacement for the bloomery that can produce steel.

Weight10000 gMax stack1Air pollution2.4 ppm/hSkillMechanics Lv 3StationAssembly Line

Notes

The Blast Furnace is a high-tier industrial crafting station that replaces the bloomery for producing steel and other refined metals. It requires placement in a Tier 3 enclosed room with 72 m³ of free volume and accepts advanced smelting upgrades to improve efficiency. Note that the Blast Furnace emits 2.4 air pollution per hour while operating, so plan your pollution management and location accordingly.

Notes are AI-generated and may be imprecise.

⚙ Craft calculator — adjust for your modules, skill & talents

▶ Open the full recipe page

Upgrade modules (one per slot)

Basic Advanced Modern Specialty

Mechanics level 0Skill level changes labor only.

Talents

Improved Assembly (Mechanics Lv 6)

Quantity to craftScales ingredients, labor, time, output & total raw by the number of crafts.

Ingredients

Ingredients for this recipe
Ingredient	Qty	Type
Screws	12	item
Brick	8	item
Iron Hull Sheet	12	item
Iron Pipe	8	item

Byproducts (garbage)

Garbage byproducts of this recipe
Material	Qty / craft
Iron Scrap	2.43
Ceramic Scrap	0.16

Crafting waste collects in the station's garbage output and must be hauled away or recycled — see the Garbage & Recycling guide.

Crafting

Crafting stats
Labor	600 calories
Craft time	25 min
Throughput	≈ 2.4 Blast Furnace / hour (base)

As a placed object

RoomIndustrialSize3×5×3

Viewer

Requires connection ports — highlighted below.

Placement

AlignmentMust be grid-aligned

Room requirements

IndoorsIn an enclosed roomRoom tierTier 3Room volume72 m³

Operating

Labor50–6000 cal

Accepts upgrade modules

Crafted here

Recycling & waste

Salvages into (per unit)

0.8× Iron Scrap

The same salvage value leaks out as garbage when this item is consumed in crafting.

How garbage, sorting & recycling work

Total raw to craft this

Steps54Total labor13351.17 calTotal time207.91 min

188.36× Iron Ore
156.67× Limestone
45× Cement
40× Palm Log
40× Shale
22.17× Wood (any)
22.04× Clay
12.3× Silica (any)
5× Quicklime
4× Wood Board (any)
0.33× Rebar

Approximate — category ingredients and any production cycles are counted as raw.

Categories

Obtained from

Blast Furnace

See also

Combustion Generator

Industrial Barge