Cradle to Gate
Identity ID
21ee072a-0319-4473-86f3-164b6cc38e64
Materials
Associated ID
bc95ac54-68d6-4be0-86fb-1840496023da
Included activities starts
Included activities ends
Description
This dataset represents the life cycle inventory (cradle-to-gate) of 'crushing, screening, dry tailings rejection, and wet magnetic separation for iron' processing vanadium-titanium magnetite in Sichuan, covering all activities related to the beneficiation production of vanadium-titanium iron concentrate, but excluding direct or indirect greenhouse gas emissions from the production of crushing equipment, magnetic separation equipment, personnel commuting, and daily office operations during the beneficiation process. The dataset was compiled from multiple data sources in accordance with 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)'. It represents the average production level of vanadium titanomagnetite ore processing in Sichuan through the processes of crushing, screening, dry discarding, and wet magnetic separation.
Activity Description
This dataset describes the processing of vanadium-titanium magnetite in Sichuan Province using "crushing, screening, dry tailings rejection, and wet magnetic separation" for iron beneficiation. The production process is as follows: 1. Crushing
Process flow:
Primary crushing: Use jaw crushers or gyratory crushers to crush the ore to a relatively large particle size (50-100 mm), which is the initial stage of the crushing process.
Secondary crushing: Further reduce the ore from primary crushing to a medium particle size (10-30 mm) using cone crushers.
Tertiary crushing: Employ fine crushers to reduce the ore from secondary crushing to a smaller particle size (<10 mm), providing suitable material for subsequent screening and dry tailings rejection processes.
2. Screening
Process flow:
Screening equipment: Use vibrating screens or other screening devices to classify the crushed ore. Oversized material (larger particles) may be returned to the crushing stage for reprocessing, while undersized material (smaller particles) proceeds to the next dry tailings rejection step.
Fine crushing: Material after intermediate crushing is sent to a secondary vibrating screen for classification. Coarse particles retained on the screen enter fine crushing (particle size <150 mm), while fine particles are sent to a roller press mill for ultra-fine crushing.
Screening and recirculation: The crushed material is screened again through a secondary vibrating screen; oversize material is returned to the roller press mill for regrinding, while undersize material is conveyed to a fine ore bin for temporary storage. 3. Dry Tailings Disposal
Process Flow:
Dry Magnetic Separation: After screening, the ore enters a dry magnetic separator, where magnetic iron minerals are separated and retained for subsequent processing, while non-magnetic materials are discarded as tailings. This step reduces the workload and cost of subsequent processing stages by removing a large amount of gangue minerals.
4. Iron separation by wet magnetic separation
Process flow:
Slurry preparation: The magnetic iron minerals, after dry discarding of tailings, are mixed with water to form a slurry, ready for wet magnetic separation and subsequent grinding and iron selection.
Wet magnetic separation: The slurry is fed into wet magnetic separation equipment, where magnetic iron minerals are further separated from gangue minerals through a magnetic field, producing high-grade iron concentrate. Non-magnetic materials are discharged as tailings.
Process Description
The iron concentrate in this dataset has a grade of 60%, belongs to transition metals, and is the main product of the mineral beneficiation process. Iron concentrate is typically in powder form and is widely used in downstream processing at sintering and pelletizing plants, serving as a key raw material for steel production.
Time period
2022
2026
Geography
China,Sichuan
Geography comment
Forming Sichuan average data through merging data from multiple sources
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
"Crushing, screening, dry tailings rejection, wet magnetic separation for iron selection" is a mineral processing method for vanadium-titanium magnetite, which gradually extracts high-grade iron minerals from the ore through multi-stage physical separation and processing technologies.