Improved process for recovering zinc from zinc-containing feedstock

A raw material, zinc-rich technology, applied in the direction of improving process efficiency, can solve problems such as high infrastructure costs, achieve the effect of optimizing capital and operating expenses, and optimizing the requirements of fire protection components
CN114555841APending Publication Date: 2022-05-27TECH REUNIDAS SA
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TECH REUNIDAS SA
Publication Date
2022-05-27

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an improved process for recovering zinc from a primary feedstock and a secondary feedstock, said process comprising a first leaching step wherein a ratio between the weight of zinc in the feedstock and the volume of the leach liquor is comprised of at least 20 kg zinc / m3 of an acidic aqueous solution; a neutralization step; and a solvent extraction stage in the presence of an organic extractant, wherein the temperature is maintained at 47 DEG C to 52 DEG C.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to the field of zinc recovery methods, and more particularly to hydrometallurgical processing using different zinc primary and / or secondary feedstocks allowing to obtain electrolytic zinc or high purity zinc compounds. Background technique

[0002] Processes using various primary or secondary zinc sources as raw materials have been known for decades. Most of them are based on hydrometallurgical processing, the main purpose of which is to obtain zinc or its salts with high purity.

[0003] The first method involves the roasting of the primary raw material (zinc sulfide concentrate), by which impure zinc oxide is obtained. It was then subjected to a leaching step with sulfuric acid, thereby producing an aqueous zinc-containing solution still containing high levels of impurities, which was purified by displacing the precipitation with zinc powder. The purified solution is sent to an electrolytic extraction step to produce m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More