| 摘要 |
<p>PURPOSE:To decompose noble metals with a simple operation without the generation of polluting vapor and the dissipation of noble metals in the stage of decomposing and extracting the noble metals from ores and scraps contg. noble metals. CONSTITUTION:Ores or scraps contg. noble metals are melted together with the mixture of a silver supplying material and a slagging agent and the noble metal components are captured in silver; the other components are separated as slag from the silver alloys. The silver supplying material is silver base or scrap contg. silver at a relatively high rate. The slagging agent is added in order to bind the components except the intended metals and to separate the same as slag in the stage of melting, and is prepd. by compounding reducing agents, oxidizing agents, etc. with flux components such as SiO2, CaCO3 and the like properly according to the compsns. of the ores and scraps which are raw materials. According to such method, no hardly melting alloys are made unlike in the cases of using lead, and the need for oxidizing removol by an ash blowing method is eliminated.</p> |
