Improvements in or relative to the foundry of metallic materials containing lead and zinc in a high oven (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in, or related to, the melting of metalliferous materials, containing lead and zinc, in a blast furnace, whose materials contain some sulfur together with said lead and zinc, characterized because the metalliferous material is first treated to reduce the sulfur content of the load to be fed to the kiln to a figure less than 1.5%. (Machine-translation by Google Translate, not legally binding)