From Hazardous Waste to Profit

How Centrifuges Extract 90% Heavy Metals?

01 Policy Trends

With the advancement of China's "zero-waste factory" policy, hazardous waste resource utilization has become a compulsory course for chemical companies.

ESG score improvement: Efficient recycling of heavy metals can directly reduce environmental risks and improve corporate sustainability ratings.

Cost reversal: Traditional incineration/landfill costs ￥3000+ per ton, while metal recycling can create additional revenue!

02 Technical Disassembly

How does the centrifuge "turn waste into treasure"?

A complete analysis of the centrifuge heavy metal recovery process: the transformation from hazardous waste to high-purity metals

1. Electroplating wastewater treatment process (taking nickel recovery as an example)

Pretreatment stage：

- Step 1 | Wastewater conditioning

Add alkali to adjust the pH to 8-9 (form nickel hydroxide precipitation)

Add flocculant (PAC/PAM)

Core separation stage：

- Step 2 | Centrifugal enrichment

Use horizontal screw centrifuge

Separation effect: The nickel content of sludge increases from 0.5% to 12%

Deep purification stage：

- Step 3 | Electrolytic refining

Acidic dissolution of centrifugal sludge (H₂SO₄ system)

Electrolytic nickel plate (purity ≥ 99.2%)

2.Pickling wastewater treatment (copper recovery case)

Process comparison：

Links	Traditional chemical precipitation method	Centrifugal enrichment method
Copper recovery rate	60-70%	88-92%
Sludge moisture content	75%	45%
Treatment cycle	48 hours	6 hours

03 Measured data of an electronics factory

Metals	Stock solution concentration(mg/L)	Purity after recovery	Recovery rate
Nickel	850	99.3%	91.7%
Copper	1200	99.1%	89.5%

#Hazardous Waste Recycling

#Heavy Metal Recovery

#Chemical Waste To Resource