Hydrometallurgy Wastewater Zero Discharging
1. Water Quality
The chloride ion content in the extraction wash water is 20-30g/L, and it is 3-4g/L under normal circumstances, which seriously exceed the emission standard.
2. Process Principle
The bipolar electrodialysis membrane combination recycling process is used. After treatment, there is less than or equal to 10mg/L of chloride ion content, less than or equal to 1mg/L of fluoride ion content and less than or equal to 1mg/L of calcium ion content in the reuse water.
3. Analysis of Operating Cost
Water inflow: 100m³/day
Working hours: 22 hours/day; 330 days/year
Water yield: 91m³/day
Annual water yield: 660,000 m³
Direct operating cost: 3,200,000 yuan/year
Unit processing costs: 4.8 yuan/m³