Chemical analiysis is almost the same for all kinds of the Bohinj ore, big limonit or thin »iron stones« or even bog ore which is also of limonite origin. There are only traces of Si, Mn, P oxides.

  total Fe (%) FeO (%) Fe2O3(%)

ore before roasting   

57,8
0,7
81,8
ore after roasting – everage sample
65,4
6,2
86,6

ore after roasting – selected sample

66,5
32,2
59,0

 

 

Building of devicessmelting-furnace-cundrič

We need some month to prepare everything. Smithing tools and hearth were at home from my father. The anvil was even made at the old Fužina Bistrica where my grandgrand father worked. We made smelting furnace with nowdays materials, later they can be replaced with original sandstone and argil. We had all instruments for measuring ( time, temperature, pressure, and weighing). At the end we  succed to get all necessary analysis of ore and our products.

 

 

 

exponats, furnace from argil and cross section of furnace,

made for   Center TNP in Trenta, Slovenia