Issue with smelting Iron Dust (Mekanism dust) into any furnace gives Silver Ingots or Lead Ingots when either IC2 or Factorization installed. Without these two mods in, Mekanism behaves normally.

The Iron Dust you get from IC2 (Maceration) still gives the Iron Ingot when smelted so I cannot blame IC2.

Using Minecraft 1.7.10
Forge 10.13.0.1180 (tried down to 1170 with the same outcome)

Only the mods below are installed:
Mekanism 7.0.0.51
Either IC2 2.2.507 (For 1.7.10)
And/or Factorization 0.8.8.85 (For 1.7.10)
Latest FMP, CCC and NEI

i am also having this issue smelting iron (mekanism) dust in an energized smelter is giving me back IC2 silver

forge 10.13.0.1180

playing on bevo tech pack mekanism version is 7.0..0.62 IC2 version is 2.2.507 experminental

Forge 1180
Mekanism 7.0.0.62
Factorization 0.8.84

Same issue as the others are reporting, getting Factorization lead for smelting Mek iron dust.

Also if you put the Silver and the Lead dust into a furnace, they don't output anything.