0010290: Ash, Potash and Pearlash are completely impervious to heat

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ID	Project	Category	View Status	Date Submitted	Last Update
0010290	Dwarf Fortress	Material Properties	public	2017-09-14 15:18	2017-09-14 15:18

Reporter	Larix2
Assigned To
Priority	normal	Severity	minor	Reproducibility	N/A
Status	new	Resolution	open
Platform		OS		OS Version
Product Version	0.43.05
Target Version		Fixed in Version

Summary	0010290: Ash, Potash and Pearlash are completely impervious to heat
Description	The hard-coded properties of ash, potash and pearlash contain no heat damage, melting or evaporation points. As i understand it, pearlash is just purified potash (KCO3), which has a melting point of 891°C, which should translate to 11604°U (not magma-safe). It has no evaporation point, but rather decomposes at heat, although i couldn't find a quote for a precise temperature where that happens. It could be simulated by a somewhat arbitrary "heat damage point". Source: https://en.wikipedia.org/wiki/Potassium_carbonate [^] Ash is a mixture of substances and thus has variable physical/chemical properties, but ashes in general will sinter/soften/melt in characteristic temperature ranges, eventually solidifying into slag after re-cooling. A cursory look suggests 1200°C is mentioned as typical "melting" temperature for wood ash, which is the ash used in Dwarf Fortress. 1200°C would be 12 160°U, just enough for magma-proofness. I could find no mention of what happens at even higher temperatures, but suspect a typical ash mixture would mostly boil away or decompose when heated beyond 2000°C. Sample source, just mentions "melting of ash" at around 1200°C: http://www.woodenergy.ie/woodasafuel/listandvaluesofwoodfuelparameters-part3/ [^]
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Date Modified	Username	Field	Change
2017-09-14 15:18	Larix2	New Issue

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