Coarse sand tailings dry discharge scheme and investment return analysis

If the properties of the tailings are understood, a reasonable dry discharge scheme can be selected according to the tailings slurry and properties of different particle sizes, and the investment in equipment can be minimized. the goal of.

Case 1
An iron ore plant in Chengde, an old line renovation project, 3000t/d iron tailings, produced 24 hours a day, tailings concentration 20%, pulp particle size is coarser than 100 mesh and contains about 70%, and 85% can be extracted after dry sieving For the above dry ore volume, the tailings slag after dry discharge contains less than 15% of the water, the bottom flow can be recycled after settlement, and a small part of the tailings slag is driven into the tailings pond. After the tailings are dried and screened, the water resources can be saved by more than 30%, the storage capacity of the tailings pond can be increased by more than 30%, and the slurry pump can be protected.
backwater return
The daily processing capacity of tailings (including water and tailings) is 15,000 t/d. After dry discharge treatment, 5,000 t/d of tailings and water will be taken away, leaving 10,000 tons of water. The original tailings pond can recover 50%, and the current can recover 80%. , 30% more recycling, dry tailings discharge can save water resources: 15000-5000*(0.8-0.5)=3000 tons/day, calculated at the water price of 0.8 yuan/ton, 3000*0.8=2400 yuan/day, one year of work 300 days, 2400*300=720,000 yuan, saving water resources of 720,000 yuan a year.
grit return
3,000 tons of coarse sand are discharged every day, with a profit of 5 yuan per ton. Working 300 days a year, 3000*5*300=4,500,000 yuan, and the annual return of coarse sand is 4.5 million yuan.
And 3000t/d iron tailings on dry screen only need to invest about 800,000 yuan.

Case 2
A vanadium mine in Shangluo, 500t/d vanadium tailings, concentration 50%, particle size coarser than 100 mesh, containing about 85%, more than 95% of the dry ore can be extracted by dry sieve, and the tailings slag after dry discharge has less than 20% water content . The tailings are used for building materials after the tailings are dry-discharged, and the tailings resources are reused; the underflow can be directly returned to the water for use, and the tailings pond is not needed at all.
backwater return
The daily processing volume of tailings (including tailings with water content) is 1000t/d. After dry discharge treatment, 700t/d of tailings and water will be taken away, leaving 300 tons of water. Calculated at a water price of 0.8 yuan/ton, 300*0.8=240 yuan, Working 300 days a year, 240*300=72,000 yuan, saving water resources of 72,000 yuan a year.
grit return
Dry discharge of 250 tons of coarse sand every day, with a profit of 10 yuan per ton, 300 days of work a year, 250*10*300=750,000 yuan, and an annual return of 750,000 yuan for coarse sand.
The investment of 500t/d vanadium tailings dry screening is about 300,000 yuan.

Epilogue
From the comparison of the above dry discharge schemes and the analysis of investment return, it can be seen that the advantages of using GFVD high-service dry discharge screen: 1. Small investment, low operating cost and high efficiency; 2. Automatic separation of solid and liquid in production, and coarse sand can be used as a resource. Reuse, the liquid can be recycled and reused, and the return on investment is high; 3. The dry screen runs smoothly, free of manual operation, and the wearing parts have a long service life and can be operated continuously for 24 hours.
Dry discharge screen is a new type of tailings dry discharge equipment that can be selected by the mining industry with low investment and high return.