Efficient Separation of Zinc and Iron from Waste Acid

During the cold rolling and metal surface treatment processes, steel mills and electroplating plants produce a large amount of acid wash solutions. These acid wash solutions have strong acidity (pH<1) and high metal content. If they enter the natural world, they have great toxicity to aquatic organisms and microorganisms, seriously polluting the environment and damaging ecological balance. The traditional neutralization precipitation method is not only expensive and incomplete in treatment, but also cannot recycle acid, resulting in resource waste. The methods of recycling include heating evaporation, extraction, and membrane permeation. These methods have disadvantages such as high processing costs, high maintenance costs, and complex operating steps. Compared with these methods, resin adsorption has obvious advantages.

At present, our company's independently developed special acid separation adsorbent and supporting application process have shown significant treatment effects on zinc and iron containing waste acid from a hazardous waste treatment company in Jiangsu. It can achieve efficient separation of zinc and iron, and ultimately recover zinc from the zinc containing acid solution, while using the iron containing acid solution as a water purification agent.

Technological Process:

Technological Process

The sequence is as follows: original waste acid, effluent (containing ferrous acid solution), desorption solution 1 (containing ferrous acid solution), desorption solution 2 (containing zinc acid solution).

Innovative Materials Technology/Service Energy Metals/Leading the Resource Cycle

Service Process

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