Cradle to Gate
Identity ID
b14764ab-6598-4025-81a2-ec4ef4d5598c
Materials
Associated ID
f0f92442-ab6c-4b53-a5e7-48da5e6b018b
Included activities starts
Included activities ends
Description
This dataset represents the life cycle inventory (cradle-to-gate) of a combined dry separation-grinding-magnetic flotation beneficiation process for copper-bearing magnetite-hematite ore in Shandong, covering all activities related to iron concentrate production, but excluding direct or indirect greenhouse gas emissions from the production of crushing and magnetic separation equipment, personnel commuting, and routine 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 of magnetite concentrate produced through beneficiation of copper-bearing magnetite-hematite ore in Shandong.
Activity Description
This dataset describes the copper-bearing magnetite-hematite ore processing using a combined dry separation-grinding-magnetic flotation beneficiation process in Shandong. The process steps are as follows:
1. Dry separation and manual selection
Dry separation: The ore is initially processed through a dry separator, where the strong magnetism of magnetite is utilized to separate gangue, removing part of the low-grade ore and reducing the amount for subsequent processing.
Manual selection: For large ore pieces, manual sorting is conducted to remove obvious waste rock, thereby increasing 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 particle size is suitable for subsequent separation processes and to guarantee sufficient mineral liberation.
3. Low-intensity magnetic separation
Perform low-intensity magnetic separation on the pulp to recover magnetite and remove the majority of gangue minerals.
4. Fine screening
Screen the pulp after low-intensity magnetic separation to separate minerals meeting the particle size requirements, ensuring the efficiency of subsequent beneficiation processes.
5. Wet Magnetic Separation
Through wet magnetic separation, fine-grained magnetic iron minerals are further recovered, and some impurities are removed to enhance the concentrate grade.
6. High-Intensity Magnetic Separation
High-intensity magnetic separation is applied 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-bearing minerals, such as chalcopyrite, producing copper concentrate, and to remove residual gangue minerals, thereby further improving the purity of iron concentrate.
Process Description
The iron ore concentrate in this dataset has a grade of 63.5%, belongs to transition metals, and is the primary product of the mineral beneficiation process. Typically in powder form, iron ore concentrate is widely used in the deep-processing operations of sintering plants and pelletizing plants, serving as a key raw material for 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 separation - 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.