China Hydrometallurgy Heat Exchanger Manufacturer Providing Thermal Solutions for Hydrometallurgical Processing Applications

A China hydrometallurgy heat exchanger manufacturer provides thermal solutions for hydrometallurgical processing—leaching, solvent extraction and electrowinning—where acidic, chloride-laden streams demand corrosion-resistant equipment. Center Enamel (Shijiazhuang Zhengzhong Technology Co., Ltd) has verified export experience with 98% sulfuric acid containment designed to EN 13445 with corrosion allowance and C5M coating, demonstrating the corrosion-engineering discipline hydrometallurgy requires.

What Is a Hydrometallurgy Heat Exchanger?

Hydrometallurgy extracts metals from ores via aqueous chemistry: leaching dissolves the metal, solvent extraction (SX) concentrates it, and electrowinning (EW) plates it out. Each step generates or needs heat control, so exchangers sit on leach, SX and EW circuits.

The dominant challenge is corrosion—leach liquors and electrolyte are strongly acidic and often contain chlorides, so material selection and corrosion allowance decide equipment life.

How Thermal Control Works in Hydrometallurgy

Leach tanks are often heated or cooled to hold the optimum dissolution temperature; SX mixer-settlers and electrolyte loops need temperature control for extraction efficiency and current efficiency; heat is removed or added through corrosion-rated exchangers.

Key Applications

• Leaching: Temperature control of leach liquor.
• Solvent extraction: Organic/aqueous loop temperature.
• Electrowinning: Electrolyte cooling for efficiency.
• Acid handling: Containing and cooling strong acid streams.

Technical Considerations

• Corrosion: Acid and chloride resistance is primary.
• Corrosion allowance: Specify extra wall thickness.
• Coatings: External protection in aggressive sites.
• Standards: EN 13445 / ASME as applicable.
• Inspection: NDT and hydrostatic test.

How to Select the Right Supplier

Require alloy confirmation, specified corrosion allowance and a documented corrosion-engineering record. Center Enamel's Malta project handled 98% sulfuric acid with A516 Gr.70 shell (≥8 mm, ≥2.5 mm corrosion allowance) and C5M coating to EN 13445—concrete evidence of the acid-corrosion discipline hydrometallurgy demands.

Material Choices for Acidic Hydrometallurgy

Conclusion

Hydrometallurgy heat exchangers live on corrosion resistance. Specify alloy, corrosion allowance and protective coating, and verify the supplier's documented acid-project experience.

Project Case Study

Project Background

This verified export project contained 98% sulfuric acid in a semi-marine environment. While desalination rather than hydrometallurgy, it is the clearest demonstration of Center Enamel's acid-corrosion engineering—directly relevant to the acidic streams in leaching and SX-EW circuits.

Project Requirements

• Medium: 98% sulfuric acid.
• Material: A516 Gr.70 shell, thickness ≥8 mm with ≥2.5 mm corrosion allowance.
• Coating: C5M white epoxy (ISO 12944 highest category).
• Environment: Semi-marine, 5–40°C, humidity up to 100%.

Technical Challenges

Long-term corrosion resistance in a saturated marine atmosphere with a highly aggressive medium—solved through material grade, generous corrosion allowance and a top-tier coating system.

Solution

Center Enamel designed and built the vessels to EN 13445 with corrosion allowance and C5M coating, establishing the corrosion-control methodology hydrometallurgy equipment requires.

Project Outcome

The acid containment vessels were delivered for the Malta project. The case is cited to evidence corrosion-engineering capability; no hydrometallurgy-specific performance is claimed.

About Center Enamel

Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) manufactures carbon and stainless steel pressure equipment in China for chemical, environmental, metallurgy and industrial markets, with ISO 9001 control and export experience.

For hydrometallurgy, Center Enamel's relevant strength is corrosion-engineered design: verified acid-project experience, EN 13445 capability, corrosion allowance and protective coatings.

• Materials: Carbon steel and stainless (304/321/316L).
• Standards: ASME, EN 13445 where applicable, ISO 9001.
• Corrosion engineering: Verified acid-containment project.

Frequently Asked Questions (FAQ)

Why is corrosion resistance critical in hydrometallurgy?

Leach liquors and electrolytes are strongly acidic and often chloride-laden; wrong material causes rapid failure and contamination.

Which material is used for acidic SX-EW streams?

316L for mild acid, higher nickel alloys for severe chloride/acid; grade follows concentration and temperature.

What is corrosion allowance and why specify it?

Extra wall thickness compensating for long-term corrosion, extending safe life; it should appear in the drawings.

How is external corrosion handled in aggressive sites?

With high-category coatings such as C5M epoxy per ISO 12944, as demonstrated on the Malta acid project.

Which standards apply?

EN 13445 and ASME for pressure design, with material and coating standards per service.

What should I provide for a quotation?

Liquor composition, temperature, pressure, flow, material grade, corrosion allowance and applicable standard.

Suggested CTA: Share your hydrometallurgical stream data (composition, temperature, pressure, material, standard) with Center Enamel for a corrosion-engineered thermal proposal.

Tags: Shell and Tube Heat Exchanger, Stainless Steel Pressure Vessel, Industrial Heat Exchanger