Green and low-carbon development has emerged as a significant trend in the global mining industry. As a leading energy consumer, the mining industry's efforts in energy conservation and emission reduction are especially critical. A specific spodumene beneficiation plant has achieved energy conservation and emission reduction through a series of innovative designs and process improvements. This serves as a model for the green transformation of comparable mining enterprises.
The spodumene concentrator is designed to process 1.05 million tons annually. Its construction and operation integrate energy conservation and emission reduction comprehensively, ensuring green and low-carbon development from ore property analysis, process design to equipment selection.
The spodumene ore belongs to the granite pegmatite type, with spodumene as the main ore mineral, accompanied by feldspar, quartz, etc. The raw ore is low-grade lithium ore, and the design of the beneficiation process needs to fully consider its characteristics. The process flow includes crushing, grinding, flotation, and dehydration, each of which uses high-efficiency and energy-saving equipment and technology.
Process design innovation
The process design of the spodumene beneficiation plant focuses on energy conservation and emission reduction, and implements multiple innovative measures:
1. Optimization of crushing process: Adopting a two-stage closed-loop crushing process, the grinding efficiency is significantly improved and energy consumption is reduced by reducing the input particle size.
2. Improvement of grinding and grading system: Introducing large-diameter hydrocyclones has improved grading efficiency and reduced energy consumption during the grinding process.
3. Flotation process adjustment: By pre floating and desliming, a large amount of tailings were removed in advance, reducing the load on subsequent operations.
Equipment selection and technological innovation
In terms of equipment selection, the beneficiation plant focuses on high efficiency and energy conservation:
1. Cone crusher: The HP series ultra fine cone crusher is selected, which achieves high efficiency crushing with its high speed and unique design.
2. Automation control system: A large number of process equipment adopts frequency conversion control, which precisely regulates according to the actual ore quantity to achieve energy conservation and consumption reduction.
Environmental Governance and Resource Recycling
The beneficiation plant has also made efforts in environmental governance and resource recycling:
1. Dust control: Set up local enclosed hoods and mechanical ventilation dust removal systems at the dust production points to effectively control the escape of dust.
2. Wastewater reuse: After treatment, the production return water and flushing water are all reused for production, achieving zero discharge of wastewater.
3. Waste gas treatment: Bag filters and acid mist purification towers are used to ensure that the waste gas meets the emission standards.
Automation and Intelligence
The automation level of the spodumene beneficiation plant is relatively high, achieving interlocking control, automatic adjustment, and online monitoring of equipment, improving production efficiency and stability.
Practical achievements
Through the above measures, the energy consumption of the beneficiation process of the spodumene beneficiation plant has been reduced to 3.85 kg of standard coal/t · raw ore, which is better than the national comprehensive energy consumption index and demonstrates significant energy-saving and emission reduction effects.
The energy-saving and emission reduction practices of the spodumene beneficiation plant not only reflect the company's positive response to the national "dual carbon" target, but also provide a feasible path for the green development of the mining industry. Through process optimization, equipment innovation, environmental governance, and automation control, the beneficiation plant has successfully achieved energy consumption reduction and production efficiency improvement, providing valuable experience for energy conservation and emission reduction work of similar mining enterprises.
