Cradle to Consumer
Identity ID
4c3e957d-5859-4036-a249-75d85b7f38fa
Materials
Associated ID
fa4257a7-4719-4995-bd94-798b172e3b9d
Included activities starts
Included activities ends
Description
This dataset is a market dataset representing the consumption market of the region. The dataset includes the transport of the product from the gate to the consumption end, and the transport service is calculated based on the transport situation of the product in the region. The product represented by this dataset is leachate, the core intermediate product obtained from zinc calcine through a hydrometallurgical leaching process, with significant 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 the zinc element, the solution also contains a small amount of impurity ions associated with the calcine, with chemical properties that are highly compatible with the subsequent purification process. Its upstream and downstream industry chains are closely connected: the upstream core raw material is zinc calcine (prepared by high-temperature roasting of zinc concentrate), and downstream it is directly applied to the purification process of hydrometallurgical zinc smelting, serving as the raw material for preparing purified zinc sulfate solution. After impurity removal and purification, it can be used for electrowinning to produce zinc, and finally processed by smelting and casting into zinc metal products as well as galvanized materials, zinc alloys and other terminal products, broadly supporting the development of construction, transportation, electric power, manufacturing and other industrial fields, making it a key intermediate carrier connecting zinc calcine and the purification process in the hydrometallurgical zinc smelting industry chain. The entire production process focuses on the leaching stage of hydrometallurgical zinc smelting, covering the entire dissolution and conversion process from the input of zinc calcine to the output of the leachate product. The dataset includes the main raw and auxiliary materials, energy and waste of the production process, while infrastructure such as production equipment manufacturing and plant construction is not included within the dataset boundary; 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,Qinghai
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%.