Method for recovering lead and zinc from copper-sulfur tailings

• Main Authors: YAN BO, CHEN TAO, HUANG JIAN, CHENG SHENG, DUAN LIANXIN, JIANG SHAOJUN
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• Subjects: CHEMISTRY; DIFFERENTIAL SEDIMENTATION; FERROUS OR NON-FERROUS ALLOYS; FLOTATION; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; METALLURGY; PERFORMING OPERATIONS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for recovering lead and zinc from copper-sulfur tailings. The method comprises the following steps: (1) carrying out fine grinding on the tailings until the material with the medium particle diameter less than 0.074 mm accounts for 70 wt% -90 wt%, and preparing ore pulp, wherein the ore pulp concentration is 25-35%; (2) adding sulfuric acid, adjusting the pH, fullymixing and leaching, and filtering; (3) fully washing acid leaching residue, adding sodium sulfide, adding butyl xanthate, adding butyl amine black powder, stirring, carrying out aeration flotation,and obtaining lead concentrate; and (4) adding polyacrylamide into an acid leaching solution in the step (2), simultaneously adding sodium hydroxide to adjust the pH, and filtering to obtain zinc slag. The method has the advantages of simple process, convenient operation, small investment, and high purity of the recovered metal, and facilitates further processing and treatment. 本发明公开了一种铜硫尾矿中铅、锌的回收方法，包括以下步骤：1)将尾矿进行细磨，至中粒径小于