Scrap

Scrap

Edit

Map color
Stack size	50
Rocket capacity	500 (10 stacks)
Mining time	0.5
Prototype type	resource
Internal name	scrap
Recycling results
0.03 0.04 0.06 0.03 0.01 0.05 0.2 0.01 0.02 0.07 0.04 0.04

Object description

Space Age expansion exclusive feature.

Scrap is a resource found on Fulgora. It needs to be recycled by hand or in the recycler to get usable products.

When traveling further from the drop location the scrap piles will not get more dense with ore. The most dense scrap piles are found under the Fulgoran vault ruins.

Scrap Recycling

The scrap recycling recipe takes 0.2 seconds per scrap at crafting speed 1.

Recycling a full belt of scrap will (on average) produce a belt that is 60% full, because the percentages of the scrap recycling recipe only add up to 60%.

Scrap recycling

Item	Output per scrap	Percentage of total output
Iron gear wheel	20%	33.3%
Solid fuel	7%	11.7%
Concrete	6%	10%
Ice	5%	8.3%
Stone	4%	6.7%
Steel plate	4%	6.7%
Battery	4%	6.7%
Copper cable	3%	5%
Advanced circuit	3%	5%
Processing unit	2%	3.3%
Low density structure	1%	1.7%
Holmium ore	1%	1.7%
Total	60%	100%

The probability for each resource is rolled independently; it is possible for a single craft to produce multiple resources.

Further recycling of these products allows the player to also obtain the following resources out of scrap:

Resource

Item	Recycled from
Iron plate	Iron gear wheel, Battery, Electronic circuit
Copper plate	Low density structure, Copper cable, Battery
Plastic bar	Low density structure, Advanced circuit
Electronic circuit	Processing unit, Advanced circuit
Stone brick	Concrete
Iron ore	Concrete

Recycling cannot undo chemistry, which means that it is not possible to obtain crude/light/heavy oil, petroleum, lubricant, coal or sulfur from scrap.

Scrap Recycling Equilibrium

A natural and inherent equilibrium for scrap recycling forms when one continuously and recursively recycles scrap and resulting outputs in a loop. Which is to say when the following are all merged together (e.g. via a sushi belt, belt bus, logistic robot swarm, or mass recycler):

• The primary output of scrap recycling
• The secondary output of recycled primary output
• The tertiary output of recycled secondary output
• etc.

One obtains a stable distribution of the 18 products listed above. This section contains useful properties of this equilibrium.

The motivation of this section is that one is often interested in other equilibria which are closely related to this one. For example one might implement the above but remove holmium, stone, and batteries in a 1:4:4 ratio for electromagnetic science. Nonetheless the volume of remaining product must still be processed and this section provides information useful to that effect.

Volume of Equilibrium Products

If one is producing 1 full belt of primary output (directly from scrap recycling) then the combined volume of secondary, tertiary, quartenary, etc. outputs is 1.142 belts. The breakdown is shown in the table below, along with the source of each material.

Volume of Equilibrium Products (Belts)

Item	Primary Output (Belts)	Secondary+ Outputs (Belts)	Sources
Iron gear wheel	0.33	0	Scrap
Solid fuel	0.117	0.039	Scrap Solid fuel
Concrete	0.100	0	Scrap
Ice	0.083	0.027	Scrap Ice
Stone	0.067	0.022	Scrap Stone
Steel plate	0.067	0.033	Scrap Steel plate, Low density structure
Battery	0.067	0	Scrap
Copper cable	0.050	0.217	Scrap Advanced circuit, Electronic circuit
Advanced circuit	0.050	0.017	Scrap Processing unit
Processing unit	0.033	0	Scrap
Low density structure	0.017	0	Scrap
Holmium ore	0.017	0.006	Scrap Holmium ore
Electronic circuit	0	0.200	Advanced circuit, Processing unit
Iron plate	0	0.311	Iron gear wheel, Electronic circuit, Battery, Iron plate
Copper plate	0	0.178	Copper cable, Low density structure, Battery, Copper plate
Plastic bar	0	0.722	Low density structure, Advanced circuit, Plastic bar
Stone brick	0	0.017	Concrete
Iron ore	0	0.003	Concrete
Total	1 Belt	1.142 Belts

This baseline can be used to quickly estimate nearby equilibria where one removes products before combining with secondary+ product. For example removing all Solid Fuel will eliminate 0.156 belts worth, bringing the total to just under 2 belts.

Note that not all scrap outputs are uniquely obtained from scrap and some products recycle into themselves. This is relevant for some logistic setups.

Equilibrium Distribution

The distribution of items at equilibrium is relevant to organizing some recycling setups. The table below shows the distribution of items in the equilibrium as well as the percent of recycler time spent on those items in equilibrium. This assumes all recyclers are equal in terms of quality and modules.

Item Distribution and Recycler-Time Breakdown

Item	Percentage of Equilibrium Items	Percentage of base Recycler-time
Iron gear wheel	15.6%	2.7%
Solid fuel	7.3%	2.5%
Concrete	4.7%	16.1%
Ice	5.2%	0.9%
Stone	4.2%	0.7%
Steel plate	4.7%	25.8%
Battery	3.1%	4.3%
Copper cable	12.5%	2.2%
Advanced circuit	3.1%	6.4%
Processing unit	1.6%	5.4%
Low density structure	0.8%	4.0%
Holmium ore	1.0%	0.2%
Electronic circuit	9.3%	1.6%
Iron plate	14.5%	16.0%
Copper plate	8.3%	9.2%
Plastic bar	3.4%	1.2%
Stone brick	0.8%	0.9%
Iron ore	0.16%	0.03%
Total	100%	100%

For context, recycling 10 items per second from this distribution will require ~3.7 common-tier recyclers to process (in expectation). This expectation will change in proportion with changes in recycle-time percentage. For example, separating concrete, iron, and steel removes ~58% of recycling time so recycling 10 items per second from the remaining 15 item collection will require 3.7 x 0.42 = ~1.6 recyclers.

History

• 2.0.7:
  • Introduced in Space Age expansion.

See also

• Fulgora
• Recycler
• Tutorial:Scrap recycling strategies