Zinc metallurgy in 1949

Germanium recovery by co-precipitation of germanium and iron in conventional zinc metallurgy

A considerable fraction of germanium is produced as a by-product in zinc metallurgy. In the conventional roast-leach-electrowin (RLE) process, most of the germanium is incorporated into the neutral leaching residue, which is the main source for germanium recovery. As the largest germanium supplier worldwide, Yunnan Chihong Zinc & Germanium Co., Ltd (Yunnan, China), recover germanium shown in Fi...

Poliomyelitis in Bristol, 1949

During the warm dry summer and autumn of 1947 the prevalence of acute anterior poliomyelitis increased in Britain to an extent never before recorded. Cases were widespread but unevenly distributed over the country ; and some areas, notably the mountains of Wales and Scotland, showed no epidemic incidence of the disease. -The greatest number of cases occurred in August, and the curve was still h...

Mental Deficiency in 1949

Decreasing Co2 Emissions in Metallurgy

Modern trends in iron metallurgy. Global carbon emissions from iron production. New solution for iron and steelmaking in a way reduce the CO2 emission to the level, where this might be needed in the post Kyoto period. New blast furnace technology, which operate with very low CO2 emissions based on drastically reduced consumption of carbon containing input materials. Injection of reducing gases ...

Metallurgy of the U

This report describes the composition and some properties of the cast iron and wrought iron that form the dome of the U.S. Capitol. It is a compilation of two recent investigations, one by NIST and one by Lucius Pitkin, Inc. These investigations were implemented by the Office of the Architect of the Capitol to determine the dome’s condition and also to predict how the outer shell might respond ...