Enrichment of rutenium from the rutenium containing waste scraps by nitric acid leaching

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The present invention refers to ruthenium (Ru) and other metallic component-containing stainless-steel wasteing-scrap nitrate solution acid by reacting and filter after said stainless-steel wasteing-scrap by washing the ruthenium said in by leaching a metal component as other said ruthenium to increase its concentration concentrated ruthenium characterized by the concentrated relates to method. Nitric acid leaching method of the present invention by using a ruthenium containing from stainless-steel wasteing-scrap lead (Pb), barium (Ba), the (Ag), bismuth (Bi), aluminum (Al), cobalt (Co), zinc (Zn) and iron (Fe) leaching of metal component other than ruthenium such as and a main is rare platinum group high value added representing an opening is enabled is concentrated.