Method for separating solid tin compound from waste lead containing bismuth (Bi) and recovering high purity tin (Sn) from it

摘要

The present invention relates to a method for separating solid tin compounds from waste lead containing bismuth (Bi) and a method for recovering high purity tin (Sn) from the bismuth (Bi), bismuth (Bi) and tin (Sn) generated during the manufacturing process This waste lead material was collected and the tin hydrochloric acid solution was extracted from the waste lead material by acid dissolving method, and then separated by filtration, and the tin tin acid solution was reacted with oxalic acid (C ₂ H ₂ O ₄ ) to separate the solid tin compound. Filtration and separation were to recover the tin (Sn).;To this end, a wastewater containing bismuth (1) and a known aqueous solution (2) having 30% hydrochloric acid solution and 70% distilled water are added to the primary reaction tank (3), respectively, and heated to only tin from the wastewater charging material (1). The step (S100) of dissolving in the aqueous solution (2), and the primary filtration in the state in which tin is dissolved in the aqueous solution (2) to obtain a tin hydrochloric acid solution (S200) and obtained, A step of producing a solid tin compound from the tin hydrochloric acid solution by adding a tin hydrochloric acid solution and oxalic acid (C ₂ H ₂ O ₄ ), which is a catalyst, to the secondary reaction tank (5), respectively (S300), and producing a solid tin compound. Filtering the solid tin compound by separating the solid tin compound (S400), drying the separated solid tin compound to remove moisture (S500), and drying the solid tin compound as a primary reduction furnace (8). ) were charged into a nitrogen (N ₂₎ is heated in an atmosphere containing the solid tin compound And while removing the acid component steps (S600) to perform a preliminary pre-heating, the acid component is completely removed, the solid tin compound is a secondary reduced to 9 for reducing the tin was heated in the to-purchased and then hydrogen (H ₂₎ atmosphere It is characterized in that the step (S700) is made sequentially.;Waste Lead, Bismuth, Tin Hydrochloric Acid Solution, Solid Tin Compound, Reduction