Cradle to Gate
Identity ID
2f98da25-3181-4e5c-b19b-196d22cc4de7
Materials
Associated ID
614e9da4-8b3e-49dc-aa2d-8b3c5c64ae63
Included activities starts
Included activities ends
Description
This dataset represents a combined process of three-stage crushing with one closed circuit, three-stage grinding, and one rougher-one cleaner flotation circuit for processing vanadium-titanium magnetite ore in Sichuan. It covers the life cycle inventory (cradle-to-gate) from crushing to the production of hematite concentrate, encompassing all activities related to the beneficiation of vanadium-titanium iron concentrate, but excluding greenhouse gas emissions--direct or indirect--associated with the production of crushing equipment, magnetic separation equipment, personnel transportation, and daily office operations during the beneficiation process. The dataset was formed by merging data from multiple 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)'. It represents the average production level of a typical integrated process in Sichuan, involving three-stage closed-circuit crushing, three-stage grinding, and one-rougher-one-scavenger flotation for processing vanadium-titanium magnetite.
Activity Description
This dataset describes the processing of vanadium-titanium magnetite in Sichuan Province using a combined process flow of three-stage closed-circuit crushing, three-stage grinding, and one-rougher-one-scavenger flotation, with the following process steps: Three-Stage Closed-Circuit Crushing Process
Three-Stage Crushing: The ore is initially processed through three stages of crushing, namely primary, secondary, and tertiary crushing. Each stage progressively reduces the ore particle size to meet the requirements of subsequent grinding operations. The selection of crushing equipment for each stage is based on the hardness and abrasiveness of the ore, ensuring uniform product size and optimized energy efficiency.
Closed-Circuit Loop: After the tertiary crushing stage, the ore undergoes screening and size classification. Material meeting the specified size criteria is conveyed to the grinding stage, while oversize material is recirculated back to the tertiary crusher for further size reduction, forming a closed-circuit loop. This process optimizes crushing efficiency and product particle size distribution, while reducing energy consumption. Three-stage grinding process
First-stage grinding: The finely crushed ore is fed into the first-stage grinding mill, where wet grinding is employed to reduce the ore particle size to meet the requirements for initial beneficiation. Ball mills or autogenous (AG) mills are typically used in this stage, with the specific choice depending on the ore's mineral composition and hardness characteristics.
Second-stage grinding: After initial beneficiation, the ore proceeds to the second-stage grinding process. This stage further reduces the particle size to enable more efficient magnetic separation or flotation. Semi-autogenous grinding (SAG) mills or continued use of ball mills may be selected to optimize energy efficiency and grinding performance. Third-stage grinding: Finally, the ore enters the third-stage grinding mill, where the particle size is further reduced to the level required for beneficiation. This step ensures maximum mineral liberation and improves the separation efficiency of subsequent beneficiation processes. Combined Process of Roughing and Scavenging Selection
Roughing: The ore slurry after grinding is fed into roughing equipment (counter-current simple magnetic separator) for preliminary separation of high-grade iron concentrate, while removing most of the gangue and secondary minerals. The equipment type and parameter settings in this stage are optimized to maximize recovery rate and separation efficiency.
Cleaning: The slurry from roughing proceeds to the cleaning stage. This process employs high-intensity dry magnetic separators for further purification, ensuring that the iron concentrate meets the grade requirements for smelting. Selected process parameters such as magnetic field strength, type and concentration of flotation reagents have been strictly optimized to achieve high purity and high recovery rate of the concentrate.
Process Description
The iron concentrate in this dataset has a grade of 55.5% and belongs to transition metals, serving as the primary product of the mineral beneficiation process. Typically in powder form, iron concentrate is widely used in downstream processing operations at sintering and pelletizing plants, making it 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
The three-stage closed-circuit crushing, three-stage grinding, and one-rougher-one-scavenger flotation combined process is a common and complex flowsheet design in vanadium-titanium magnetite ore beneficiation in China. This process aims to achieve efficient recovery and concentration of vanadium-titanium magnetite through multiple stages of crushing, grinding, and mineral separation. It is particularly suitable for vanadium-titanium magnetite ores containing complex mineral compositions, enabling comprehensive recovery of valuable minerals such as iron, vanadium, and titanium through precise material processing and separation.