Cradle to Gate
Identity ID
76e8eaf3-4e57-455d-8b1f-c57c0ea28a19
Materials
Associated ID
e84533a9-6464-4e82-aacf-15dc13c17465
Included activities starts
Included activities ends
Description
This dataset represents the life cycle inventory (cradle-to-gate) of the iron ore concentrate production process in Sichuan, specifically the 'three-stage crushing - semi-autogenous grinding - ball milling - tower milling - multi-stage magnetic separation' process for vanadium-titanium magnetite. It covers all activities associated with the beneficiation of vanadium-titanium iron ore concentrate from crushing to the production of magnetic concentrate, excluding direct or indirect greenhouse gas emissions from the production of crushing equipment, magnetic separation equipment, personnel travel, and daily office operations during the beneficiation process. The dataset was compiled from multiple data sources in accordance with the 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 the "three-stage crushing - semi-autogenous grinding - ball milling - tower milling - multi-stage magnetic separation of iron concentrate" process for vanadium-titanium magnetite ore in Sichuan.
Activity Description
This dataset describes the 'three-stage crushing - semi-autogenous grinding - ball milling - tower milling - multi-stage magnetic separation of iron concentrate' process in Sichuan Province for processing vanadium-titanium magnetite, with the following production process:
1. Primary Crushing
Process Flow:
Primary crushing equipment: Typically uses jaw crushers to reduce large raw ore (with particle sizes possibly greater than 1000 mm) to smaller sizes (50-100 mm), providing feed material for the secondary crushing stage.
2. Secondary Crushing
Process Flow:
Secondary crushing equipment: Usually employs cone crushers or gyratory crushers to further reduce the ore from primary crushing to a particle size of 10-30 mm.
3. Screening
Process flow:
Screening equipment: Use a vibrating screen to classify ore by particle size. Oversize material (larger particles) is returned for re-crushing, while undersize material (smaller particles) proceeds to the fine crushing stage.
4. Fine Crushing
Process flow:
Fine crushing equipment: Use a fine crusher to reduce the ore particle size from intermediate crushing to 5–10 mm, then feed it into the subsequent grinding process.
5. Semi-Autogenous Grinding and Classification
Process flow:
Semi-autogenous grinding equipment: Ore is ground in a semi-autogenous mill, further reducing particle size to 0.1–0. 2 mm.
Classification equipment: Use spiral classifiers or hydrocyclones to classify the ground slurry; slurry meeting the particle size requirements proceeds to the magnetic separation process, while oversized particles are returned for regrinding.
6. Ball Milling and Classification
Process flow:
Ball milling equipment: Further grind the ore in a ball mill to below 0.074 mm, ensuring maximum mineral liberation.
Classification equipment: Use spiral classifiers or hydrocyclones to classify the slurry after ball milling; qualified slurry proceeds to magnetic separation, while oversized particles are returned to the ball mill for regrinding.
7. Iron Selection by Magnetic Separation
Process Flow:
Magnetic Separation Equipment: Wet magnetic separators are used to separate magnetic iron minerals from the pulp. Magnetic minerals are recovered through the magnetic separator, while non-magnetic materials are discharged as tailings.
8. Tower Mill Grinding and Classification
Process Flow:
Tower Mill Equipment: The pulp, after preliminary magnetic separation, enters the tower mill for further fine grinding, reducing the mineral particles to sub-micron size.
Classification Equipment: The ground pulp is classified using hydrocyclones or classifiers to ensure fine particles proceed to the final magnetic separation stage.
9. Iron ore beneficiation by magnetic separation (second magnetic separation)
Process flow: Magnetic separation equipment: Further purify the concentrate through magnetic separation equipment to ultimately obtain high-grade iron concentrate.
Process Description
The iron ore concentrate in this dataset has a grade of 57%, belongs to transition metals, and is the primary product of the mineral processing stage. Iron ore concentrate is typically in powder form and is widely used in downstream processing in sintering and pelletizing plants, serving as a key raw material in steel production.
Time period
2022
2026
Geography
China,Sichuan
Geography comment
Forming Sichuan's average data through data merging from multiple sources
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
"Primary crushing, secondary crushing, screening, fine crushing, semi-autogenous grinding classification, ball mill classification, magnetic separation for iron extraction, tower mill classification, and magnetic separation for iron extraction process" is a multi-stage, efficient vanadium-titanium magnetite mineral processing flow. Suitable for processing complex ores, it achieves efficient purification of iron concentrate through multi-stage grinding and magnetic separation technologies. This process improves resource utilization, reduces tailings discharge, and is widely applied in comprehensive mineral processing for large-scale mines and complex ores.