Method for recovering indium-enriched marmatite from copper, zinc and indium coexisting polymetallic ore under low-alkaline condition

Abstract

The invention discloses a method for recovering indium-enriched marmatite from copper, zinc and indium coexisting polymetallic ore under a low-alkaline condition. By adoption of the method, the technical problems that under the high-alkaline condition, indium-enriched marmatite is poor in floatability, difficult in excitation and low in indium recovery rate, and concentrate metals are high in content are solved. The method comprises the steps that a chemical agent is added into crushed and ground raw ore, slurry is formed through blending, and then copper, zinc and sulfur iso-flotation is conducted; and coarse grains are reground after iso-flotation rough concentrate is graded, an inhibitor is added for adjusting the mineral slurry and the pH value of the slurry, then copper selection is conducted, and copper concentrate and copper cleaner tailings are obtained; the copper cleaner tailings and copper, zinc and sulfur iso-flotation tailings are blended, then an activator is added and blended with the slurry, zinc and sulfur bulk flotation is conducted, and coarse grains are reground after zinc and sulfur bulk flotation rough concentrate is graded; and lime is added for adjusting the pH value of the mineral slurry, then zinc selection is conducted, and zinc concentrate and zinc cleaner tailings are obtained. By adoption of the method, the use amount of the inhibitor in the copper and zinc grading operation, the flotation mineral flurry pH value and the concentrate metal contents are lowered, and the indium and zinc recovery rates are increased; and meanwhile, the flotation process is simplified, and the flotation efficiency is improved.

Description

technical field

[0001] The invention belongs to the field of mineral processing, and relates to a method for recovering indium-rich sphalerite from copper-zinc-indium co-associated polymetallic ore under low alkali conditions. Background technique

[0002] As a strategic rare and precious metal resource, indium has been widely used in the fields of computer, energy, electronics, communication, optoelectronics, medicine, health, national defense, aerospace, nuclear industry and modern information industry. my country's indium resource reserves rank first in the world, but there are few independent indium deposits. Indium is mainly associated in non-ferrous metal deposits such as copper, lead, zinc, and tin, such as copper, zinc, and tin associated polymetallic deposits in the Dulong mining area of ​​Wenshan, Yunnan, Dachang, Guangxi Cassiterite polymetallic sulfide deposits and Yunnan Mengzi Bainiuchang lead-zinc-silver polymetallic sulfide deposits are rich in indium resource...