Cradle to Gate
Identity ID
c95509b1-af13-49cf-82af-ced9439997bd
Materials
Associated ID
6ebcf90c-181d-45f6-b23f-e8123e26c8ed
Included activities starts
Included activities ends
Description
This dataset represents a product that is new zinc sulfate solution, the core intermediate product produced in the purification process of the hydrometallurgical zinc smelting flow, with clear core characteristics: a zinc content of approximately 140 g/L; impurities such as lead, iron, copper and cadmium in the solution have been largely removed, giving relatively high purity and strong chemical stability, which precisely meets the stringent raw-material purity requirements of the subsequent zinc-electrowinning process. Its upstream and downstream industrial chain is closely linked: the upstream core raw material is the leaching solution produced in the leaching process of hydrometallurgical zinc smelting, and the downstream is directly applied to the electrowinning stage of hydrometallurgical zinc smelting as the core electrolyte of the electrolytic cell, depositing cathode zinc at the cathode through electrochemical action, then preparing finished metallic zinc by casting and finally processing it into 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 leaching solution and the electrowinning process in the hydrometallurgical zinc smelting industrial chain. The entire production process focuses on the purification stage of hydrometallurgical zinc smelting, with the full process covering the entire purification-and-transformation process from the input of leaching solution to the output of the new zinc sulfate solution. 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 purification step in zinc hydrometallurgy, covering the whole process from leachate to fresh zinc sulfate solution.
Process Description
The fresh zinc sulfate solution obtained from the purification process is an important intermediate product in hydrometallurgical zinc production. The zinc content is about 140 g/L, and most impurities have been removed. It is suitable for the subsequent zinc electrowinning process.
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
The main purpose of purification is to remove harmful impurities and residual impurities such as arsenic, antimony, germanium, etc.; at the same time, it enriches valuable metals such as copper, cadmium, and cobalt for further recycling. Purification methods are roughly divided into two categories: one is to add zinc powder to remove copper and cadmium, and then remove cobalt and nickel in the presence of an activator; the other is to add zinc powder to remove copper and cadmium, and then add special agents to react with cobalt to form an insoluble solid to remove cobalt. The purification process studied in this article adopts the zinc powder-xanthate method. The recovery rate of zinc during the purification process is generally 99.5%.