Factorio 2.0 Space Age: Belt Speeds, Smelting Columns & Ratio Balancing Guide
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In Factorio 2.0: Yellow Belts transfer 15 items/sec (900/min); Red Belts double to 30 items/sec (1,800/min); Blue Belts reach 45 items/sec (2,700/min); and Space Age Green Belts hit 60 items/sec (3,600/min). Each lane holds exactly half of the total throughput.
Iron and Copper Ore take 3.2 seconds base to smelt. A Stone Furnace (crafting speed 1.0) smelts 1 ore every 3.2s; a Steel or Electric Furnace (speed 2.0) smelts 1 ore every 1.6s. To saturate 1 Yellow Belt (15/s), build 48 Stone or 24 Steel Furnaces. For 1 Blue Belt (45/s), build 72 Steel Furnaces (36 per side).
Electronic Circuits (Green Chips) require 3 Copper Cables and 1 Iron Plate every 0.5 seconds. Because Copper Cable crafting produces 2 cables every 0.5s, 3 Copper Cable assemblers produce 6 cables/s—exactly feeding 2 Green Chip assemblers with zero conveyor belts between them.
When train wagons unload, uneven belt drawing starves one wagon while another remains full. Place 4x4 or 8x8 throughput-unlimited splitters to ensure every input lane redistributes evenly across all output lanes regardless of downstream blockages.
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A belt balancer distributes items evenly across multiple conveyor belts (e.g. 4 inputs to 4 outputs). A lane balancer balances the left and right halves of a single conveyor belt to prevent one half from clogging when inserters only pull from one side.
Vulcanus Foundries craft at 4.0x speed, use molten iron and copper from lava/calcite, and have built-in +50% productivity bonuses. One single Foundry replaces up to 8 standard electric furnaces while using zero solid ore.