Cradle to Gate
Identity ID
26007c84-4220-4e3d-b4f1-d1b9066abc85
Materials
Associated ID
fa4257a7-4719-4995-bd94-798b172e3b9d
Included activities starts
Included activities ends
Description
This dataset represents a product that is leaching solution, the core intermediate product of zinc roasted ore obtained via a hydrometallurgical leaching process, with distinctive core characteristics: the zinc leaching rate reaches 85%, the zinc content is approximately 139.85 g/L, and the zinc concentration is relatively high, laying a good foundation for the subsequent purification process; in addition to zinc, the solution also contains a small amount of impurity ions accompanying the roasted ore, and its chemical properties are highly compatible with the subsequent purification process. Its upstream and downstream industrial chain is closely linked: the upstream core raw material is zinc roasted ore (prepared by high-temperature roasting of zinc concentrate), and the downstream is directly applied to the purification process of hydrometallurgical zinc smelting, serving as the raw material for preparing the new zinc sulfate solution, which after impurity removal and purification can be used for electrowinning of zinc, and finally cast and processed into finished metallic zinc products as well as galvanized materials, zinc alloys and other end products, broadly supporting the development of industrial fields such as construction, transportation, electric power and manufacturing; it is the key intermediate carrier linking the zinc roasted ore and the purification process in the hydrometallurgical zinc smelting industrial chain. The entire production process focuses on the leaching stage of hydrometallurgical zinc smelting, with the full process covering the entire dissolution-and-transformation process from the input of zinc roasted ore to the output of the leaching-solution product. The dataset includes the main raw and auxiliary materials, energy and wastes in the production process; infrastructure such as the manufacture of production equipment and plant construction is not included within the boundary of the dataset; the data inventory is formed by merging data from multiple sources.
Activity Description
The entire production process includes the leaching step in hydrometallurgical zinc extraction, covering from roasted zinc ore to the leach solution.
Process Description
The leachate obtained by wet leaching of zinc roasted ore contains higher zinc concentration. In this study, the zinc leaching rate was 85%, and the zinc content per liter of leach solution was approximately 139.85 g.
Time period
2021
2026
Geography
China
Geography comment
Generated by merging multiple data sets in this geographical location.
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Zinc calcine leaching adopts two consecutive stages: neutral leaching and acid leaching. The zinc calcine is first leached neutrally using the solution from the acid leaching stage. Neutral leaching actually uses the zinc calcine to neutralize the free acid in the acidic leach solution and control a certain acidity (pH=5.2~5.4). In neutral leaching, only a small amount of ZnO is dissolved, and the zinc leaching rate is 75% to 80%. The purpose of acid leaching is to dissolve the zinc in the leaching residue as completely as possible to further increase the zinc leaching rate; at the same time, it is also necessary to obtain a slurry with good filterability to facilitate solid-liquid separation. After two stages of leaching, the zinc leaching rate is 85% to 90%.