Iron Smelting in the Nomadic Empire of Xiongnu in Ancient Mongolia

The first archeological evidence in Mongolia of an iron-smelting site has been discovered at Khustyn Bulag. This site belongs to the Xiongnu age (209BCE-155CE). The Xiongnu was the first Nomadic Empire in east Eurasia. Our excavation area was quite small but contained many interesting structures (smelting furnaces, calciners or roasters of iron ore, and slag disposal pits) and artifacts (a few pieces of pottery of Xiongnu age, many clay tuyeres and slag, stone hammers and stone anvil). We could categorize the furnaces into three types, but all of them had slag pits. In addition, several clay tuyeres were used at each furnace. These characteristics of iron smelting are related not to China but to South Siberia. We also performed metallurgical and mineralogical analyses on the slag, clarified the processes of direct steel-making, roasting of iron ore (Magnetite), and found the iron mine that supplied ore to the site. We consider our research results sufficient to undertake a comparative study on Eurasia scale. This iron-smelting technology was introduced into ancient Mongolia from the West through the Steppe-Taiga area and was adjusted and locally developed (or originally), even though iron production was in conflict with the traditional nomadic life-style of the ancient Mongolians. We will continue our research, to clarify the interesting process that led nomadic society to produce political system and establish a nomadic state.