Cradle to Gate
Identity ID
ac308ef7-d506-47ca-b179-38dd22e664d4
Materials
Associated ID
3902825b-a736-4ca9-9477-e3d779fff194
Included activities starts
Included activities ends
Description
This dataset represents the production of 1 t of electrolytic manganese. It assesses the resource consumption and environmental load of the manganese ore mining, manganese concentrate production, manganese oxide production and electrolytic metallic manganese production processes. Electrolytic manganese is a high-purity metallic manganese product, in the form of flakes or lumps, with excellent electrical conductivity and corrosion resistance, a melting point of 1246 degrees Celsius and a density of about 7.2 g/cm3; its chemical properties are relatively stable but it can react under acidic conditions. The key upstream raw material of the product is rhodochrosite, which is converted into soluble manganese salts by acid leaching and then undergoes multi-step purification and electrolytic deposition of metallic manganese; the downstream is mainly applied in the steel industry as an alloying element to improve the mechanical properties of materials, being especially indispensable in the production of stainless steel and high-strength low-alloy steel, and is also widely used in battery manufacture, chemical catalysis and electronic materials. The system boundary includes ore pretreatment, leaching, purification, electrolytic deposition, post-treatment and the treatment of waste gas, wastewater and solid waste, and explicitly excludes mine exploitation, long-distance transport of raw materials, production equipment manufacture and plant infrastructure construction. The data inventory is formed by merging data from multiple sources.
Activity Description
The entire production process includes manganese ore mining, manganese concentrate production, manganese oxide production, and electrolytic manganese metal production.
Process Description
Metal manganese is a silver-gray hard and brittle metal with active chemical properties but strong corrosion resistance. It has good alloying ability and deoxidation and desulfurization effects. Manganese is widely used in various industrial fields such as metallurgy, chemical industry, food, and aerospace. Most of the manganese metal is consumed directly or indirectly in steel production, while some manganese metal is used in batteries, electronics, special chemicals and other industries.
Time period
2020
2026
Geography
China
Geography comment
Generated by merging multiple source data sets in this geographical location.
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The production stage of electrolytic manganese metal includes a series of production processes, which can be roughly divided into three steps, namely, leaching of manganese ore (i.e., raw material processing and leaching), removal of impurities (i.e., neutralization to remove iron, press filtration, sulfidation to remove heavy metals, adsorption and standing of the solution after sulfidation), and electrolysis (i.e., electrolysis process and electrolytic manganese post-treatment process).