Method for cascade neutralization and cascade flotation of multi-metal acid wastewater
A technology for acidic wastewater and polymetallics, applied in chemical instruments and methods, wet separation, process efficiency improvement, etc., can solve the problems of resource waste, environmental pollution, etc., and achieve effective separation, efficient recovery and safe treatment.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
specific example 1
[0038] The concentration of cyanide pyrite tailings produced by the process of 10wt% sulfuric acid in a stirred tank at the waste matter according to the solid-liquid mass ratio of 1: 1 ratio with stirring, the temperature stirred for 50 ℃, stirring speed 50r / min, air charge 50m 3 / H, stirring time 4h, the reaction was stirred into the thickener, flow through filter bottom dehydrated decyanation tailings, multi-metal overflow drainage, the concentration of sulfuric acid waste water resulting multimetal of 2wt%, gold 0.3 mg / L, silver 0.3mg / L, copper 500mg / L, zinc 500mg / L, iron 3000mg / L, arsenic 100mg / L.
[0039] A plurality of metal to acid waste water transport tank and stirring, adding lime powder containing 75wt% calcium oxide was stirred, and the temperature 40 ℃, stirring speed of 100r / min, and the time of 4h, the reaction end point pH of 1.5, into the reaction the precipitate was concentrated thickener, flow through the bottom filter was washed horizontal fil...
specific example 2
[0046] The cyanide degenesis and the sulfur-containing gold concentrate calcined have a waste of 20% by weight of the waste sulfate in the stirring tank in the stirring tank mixed stirring, stirring the temperature of 65 ° C, stirring the speed 125R / min, pneumatic volume of 100M 3 / h, stirring time is 5 h, after stirring, enter the concentrator, the bottom fluid is dehydrated to give the deodoxide, overflow is a poly metallic acid wastewater, the obtained multi-metal acid wastewater concentration is 6% by weight, containing gold 0.65 Mg / L, silver 0.65mg / L, copper 1000mg / L, zinc 1000mg / L, iron 8000mg / L, arsenic 300 mg / L.
[0047] The multi-metal acid wastewater is delivered to a neutralizing tank, adding 80% by weight of lime powder stirring, neutralizing temperature 50 ° C, stirring the rotation speed 200R / min, neutralization time, and the reaction endpoint pH is 2.0, and after entering The concentrated concentration is concentrated, and the bottom flow is filtere...
specific example 3
[0054] The concentration of the cyanide degenesis and the yellow iron mine process was 30% by weight of the waste sulfate in the stirring tank was mixed in a ratio of solid liquid mass than 1: 5, stirring the temperature of 80 ° C, stirring the rotation speed of 200R / min, pumping 150M 3 / h, stirring time is 6 h, after stirring reaction, enter the concentrator, the bottom flow filter machine is dehydrated to give the deodoxide residue, the overflow is a poly metallic acid wastewater, the obtained poly metallic acid wastewater concentration is 10% by weight, and the gold 1.0 Mg / L, silver 1.0mg / L, copper 1500mg / L, zinc 1500mg / L, iron 13000mg / L, arsenic 500mg / L.
[0055] The multi-metal acid wastewater is delivered to the medium and stirring tank, and the lime powder containing 85 wt% calcium oxide is added, the neutralizing temperature is 60 ° C, stirred at the temperature of 300 r / min, the neutralization time is 2.5, the reaction endpoint is 2.5, and after entering ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Fineness | aaaaa | aaaaa |
| Fineness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More