Cradle to Gate
Identity ID
a64c24c7-cdf1-46d8-aced-71e7852dffc7
Materials
Associated ID
f0f92442-ab6c-4b53-a5e7-48da5e6b018b
Included activities starts
Included activities ends
Description
This dataset represents the full life cycle inventory (cradle-to-gate) of copper-bearing magnetite-hematite processing via a dry separation-grinding-magnetic flotation combined beneficiation process in Shandong. The inventory covers all activities related to iron concentrate beneficiation production, starting from dry separation to the output of iron concentrate, but excludes direct or indirect greenhouse gas emissions associated with the production of crushing equipment, magnetic separation equipment, staff commuting, and daily office operations during the beneficiation process. The dataset was compiled from multiple data sources based on national standards such as the 'Manual of Production and Emission Coefficients for the Iron Ore Mining and Processing Industry (0810)', 'Emission standard of pollutants for mining and mineral procressing industry (GB 28661-2012)', 'Cleaning production standard Iron ore mining and mineral processing industry', and 'The norm of the energy consumption per unit product of iron ore dressing(GB31337-2014)', representing the average production level for producing hematite concentrate from copper-bearing magnetite-hematite ore in Shandong through mineral processing procedures.
Activity Description
This dataset describes the combined beneficiation process of dry separation-grinding-magnetic flotation for copper-bearing magnetite-hematite in Shandong, with the following process steps:
1. Dry separation and Hand Picking
Dry separation: The ore is initially processed through a dry separator, which separates gangue based on the strong magnetism of magnetite, removing part of the low-grade ore and reducing the amount for subsequent processing.
Hand picking: For large-sized ores, manual sorting is conducted to remove obvious waste rocks, improving the efficiency of subsequent processing.
2. Stage Grinding
First-stage grinding: The ore enters the grinding equipment for coarse grinding, reducing particle size and achieving preliminary liberation of iron minerals, copper minerals, and gangue.
Second-stage grinding: Further fine grinding to ensure the mineral particle size is suitable for subsequent separation processes, guaranteeing full mineral liberation.
3. Low-Intensity Magnetic Separation
Perform low-intensity magnetic separation on the pulp to recover magnetite and remove most of the gangue minerals.
4. Fine Screening
Screen the pulp after low-intensity magnetic separation to separate minerals meeting the required particle size, ensuring the efficiency of subsequent separation processes.
5. Wet Magnetic Separation
Through wet magnetic separation, fine magnetic iron minerals are further recovered, and some impurities are removed to increase the grade of the concentrate.
6. High-Intensity Magnetic Separation
High-intensity magnetic separation is used to recover weakly magnetic minerals such as hematite, further separating non-magnetic minerals.
7. Direct Flotation
Direct flotation is conducted to separate and recover copper minerals such as chalcopyrite, producing copper concentrate, while removing residual gangue minerals to further improve the purity of the iron concentrate.
Process Description
The iron concentrate in this dataset has a grade of 60%, belongs to transition metals, and is the primary product of the mineral beneficiation process. Iron concentrate is typically in powder form and is widely used in downstream processing industries such as sintering and pelletizing plants, serving as a key raw material in steel production.
Time period
2022
2026
Geography
China,Shandong
Geography comment
Forming Shandong's average data through the merging of multiple datasets
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The dry separation and hand picking - staged grinding - weak magnetic - fine screening - elutriation magnetic separation - strong magnetic - positive flotation process of Shandong iron ore is a multi-step, multi-technology integrated beneficiation process suitable for processing complex types of iron ore.