Translations:Survival Guide - Advanced tech/29/en
From Vintage Story Wiki
The only method to smelt iron ore and quartz (to make glass) is to use a bloomery. Bloomeries reach temperatures higher than a firepit and can be used to smelt any ore, but cost significant quantities of fuel. The iron bloom, harvested from the bloomery, must be worked on the anvil to yield iron ingots, which can then be used to smith tools. This is a rather tedious process but this task can be mechanized using the helve hammer.