Cradle to Gate
Identity ID
9665be71-cb0f-42e0-b6e8-d2e4ff034b9b
Materials
Associated ID
580e28da-f81d-4942-b130-35b46d14056d
Included activities starts
Included activities ends
Description
This dataset represents the integrated process of three-stage closed-circuit crushing, three-stage grinding, and one-rougher-one-scavenger flotation for vanadium-titanium magnetite ore in Hebei. It provides a life cycle inventory (cradle-to-gate) covering all activities related to the beneficiation production of vanadium-titanium iron concentrate, from the beginning of crushing to the production of titanium concentrate. However, it does not include direct or indirect greenhouse gas emissions from the production of crushing equipment, magnetic separation equipment, personnel transportation, or daily office operations during the beneficiation production 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)'. It represents the average production level of vanadium-titanium magnetite processing in Hebei using a combined process of three-stage closed-circuit crushing, three-stage grinding, and one-rougher one-scavenger flotation.
Activity Description
This dataset describes a combined three-stage closed-circuit crushing-three-stage grinding-roughing-scavenging process for processing vanadium-titanium magnetite in Hebei Province. The process flow is as follows:
1. Three-stage Closed-Circuit Crushing Process
Three-stage Crushing: The ore first undergoes three stages of crushing, including coarse crushing, medium crushing, and fine crushing. Each stage aims to progressively reduce the particle size of the ore to meet the requirements of subsequent grinding processes. The selection of crushing equipment at each stage is based on the hardness and abrasiveness of the ore, ensuring uniform particle size and optimized energy efficiency.
Closed-Circuit Recycling: After the fine crushing stage, the ore undergoes a screening process to classify it according to particle size. Material meeting the particle size requirements is conveyed to the grinding stage, while material not meeting the standards is returned to the fine crushing stage for further crushing, forming a closed-circuit recycling process. This process optimizes crushing efficiency and product particle size distribution while reducing energy consumption.
2. Two-Stage Grinding
First-Stage Grinding: The crushed ore enters a ball mill for the first-stage grinding, typically controlling the particle size to around -200 mesh (65%). The purpose is to ensure sufficient liberation of the mineral particles.
Second-Stage Grinding: After the first-stage grinding, the mineral particles need further refinement and enter the second-stage grinding equipment. They are typically ground to a fineness of -200 mesh (95%) to ensure sufficient liberation of the mineral particles, which is beneficial for the subsequent magnetic separation process.
3. Two-Stage Screening
First-Stage Screening: Screening is performed after the first-stage grinding to separate qualified fine-grained minerals. Minerals that do not meet the standards are returned to the grinding equipment for further processing.
Second-Stage Screening: Screening is performed again after the second-stage grinding to ensure that the particle size of the material entering the magnetic separation stage meets the requirements, improving the effect and efficiency of magnetic separation.
4. Three-Stage Magnetic Separation
First-Stage Magnetic Separation (Roughing): The minerals after grinding and screening enter the magnetic separation equipment. Weak magnetic roughing is performed first to remove most of the gangue minerals and initially recover iron minerals.
Second magnetic separation (scavenging): After roughing, the material undergoes further scavenging to recover valuable minerals that were not separated during roughing, further improving the iron mineral recovery rate.
Third magnetic separation (cleaning): Finally, the material enters a cleaning magnetic separator, where strong magnetic force is used for final cleaning to obtain high-grade iron concentrate, ensuring that vanadium and titanium elements in the concentrate are also effectively recovered.
5. First-stage filtration
Dewatering treatment: The concentrate after three magnetic separations contains a high moisture content and needs to be dewatered by filtration equipment. Vacuum filters or ceramic filters are typically used to reduce the moisture content of the concentrate to meet specified standards, facilitating subsequent transportation and processing.
Process Description
Titanium concentrate is mined and selected from ilmenite or titanomagnetite, and it is a raw material for producing titanium dioxide, which has a wide range of applications.
Time period
2022
2026
Geography
China,Hebei
Geography comment
Forming Hebei average data through merging multiple datasets
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The vanadium and titanium magnetite beneficiation process involving three-stage closed-circuit crushing, two-stage grinding, two-stage screening, three-stage magnetic separation, and one-stage filtration is a systematic and refined procedure. Targeting the characteristics of vanadium and titanium magnetite, this process employs multi-stage beneficiation techniques to effectively improve the grade of iron concentrate and recover rare elements such as vanadium and titanium. By optimizing the process design, energy consumption and production costs are also reduced. This technology has been widely applied in regions rich in vanadium and titanium magnetite resources.