Iron Microspheres and Lead in Slag Wool? (Mineral Wool)

Mick West

Staff member

After reading how most of the insulation in the world trade center was "Slag Wool" (a type of mineral wool insulation made from iron refining) I wondered if it might have some iron microspheres in it. So a little searching led me to the above image, from:

They are very interesting because they look like iron microspheres. But without checking with a magnet, it's impossible to tell. They might possibly be melted fibers with some carbon making them dark.

Another possibility is lead. Some slag wool was made from lead slag - although it's not clear when that practice stopped. Seems to have still being going on the 1970s though
Metabunk 2018-10-16 12-16-32.jpg

The "Fowler 1980" reference leads to:

Which describes how the process creates spheres ("shot") which is separated from the wool
Metabunk 2018-10-16 12-28-50.jpg

The shot here is slag though, not iron.
Last edited:

Mick West

Staff member
More on lead in slag wool:

  1. Mineral wool insulation manufactured before about 1970 has been found to have lead particles. According to industry sources, lead slag is no longer used in the manufacture of mineral wool, although lead can be present as a trace impurity (CONSAD 1993).
Content from External Source
Construction of the World Trade Center towers was in 1968 to 1970
Thread starter Related Articles Forum Replies Date
econ41 AE911's Response to Mick West's Iron Microspheres Talk. 9/11 17
Mick West Debunking 9/11 Microsphere Myths 9/11 0
Mick West The Quantity of Iron Microsphere at WTC Ground Zero after 9/11 9/11 19
Mick West Making Iron Microspheres - Grinding, Impacts, Welding, Burning 9/11 116
Hitstirrer Debunked: Iron Microspheres in 9/11 WTC Dust as Evidence for Thermite 9/11 743
Mick West Explained: "Iron Giant Robot" Walking on Clouds [Cooling Towers Plumes} Skydentify - What is that Thing in the Sky? 6
Rory Claim: Pfizer sponsors many mainstream TV shows (with the implication being that can lead to bad things) Coronavirus COVID-19 69
Dan Wilson Debunked: Infowars product damages sperm Health and Quackery 2
M Bornong Can Belief in Chemtrails and/or other Conspiracy Theories Lead to Violence? Contrails and Chemtrails 4
Balance Home remedies lead to animal cruelty charges Health and Quackery 3
Dan Wilson Debunked: Terrifying Facts About Makeup Health and Quackery 1
Mick West Debunked: Irrefutable proof we are all being sprayed with poison [Lead in Avgas] Contrails and Chemtrails 13
Jason How Doing Research can Lead Both In and Out of the Rabbit Hole Escaping The Rabbit Hole 55
AluminumTheory Psychological Factors That Lead Me Into the Rabbit Hole Escaping The Rabbit Hole 44
Pete Tar Claim - The Earth is venting deadly and explosive gases which will lead to extinction Science and Pseudoscience 15

Related Articles