In the context of industrial green transformation, phosphogypsum - a major industrial solid waste generated during the wet-process production of phosphoric acid - has become an urgent environmental protection issue that needs to be addressed. For every 1 ton of phosphoric acid produced, approximately 4-5 tons of phosphogypsum are generated. The historical stockpile in China has exceeded 800 million tons, with a comprehensive utilization rate of only about 50%. The soluble phosphorus, fluorine, and heavy metals contained in it restrict its resource utilization and pose potential threats to the soil and groundwater.

ZK, leveraging its profound technical accumulation and continuous innovation capabilities, is dedicated to the research and development of comprehensive solutions for the harmless disposal and resource utilization of phosphogypsum. It provides the industry with effective and environmentally friendly equipment support and system process guarantees.

1. Optimize the washing process to improve the quality of raw materials

The impurity content in phosphogypsum directly affects the subsequent processing. ZK has upgraded the first washing and filtration process, adopted effective filtration equipment and optimized the washing process, significantly reducing the content of water-soluble phosphorus, fluorine and other harmful substances, and greatly improving the purity of phosphogypsum, laying a solid foundation for subsequent resource utilization. 

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2. Build a closed-loop process system to achieve deep and harmless treatment.

To achieve harmless treatment, the company innovatively constructed a complete process chain including secondary neutralization, re-milling and secondary filtration:

Secondary neutralization: Precisely add neutralizing agents to adjust the pH value and inactivate harmful substances;

Re-milling process: Promote the mixture of solids and liquids to improve reaction efficiency;

Secondary filtration: Further dehydrate and remove impurities to ensure stable and compliant output.

Each link operates in coordination, forming a closed-loop treatment system, effectively ensuring that the products meet environmental protection requirements.

3.  The supporting system is well-structured, ensuring continuous and stable operation.

In addition to the core production equipment, ZK also synchronously builds auxiliary systems such as power supply and material transportation. Stable power supply ensures the effective operation of the equipment; advanced conveying equipment like belt conveyors and bucket elevators enable continuous material circulation, enhancing the automation level and operational reliability of the entire line.

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4. All products provide support and cover the entire processing process.

Relying on the technical accumulation in the fields of building materials, metallurgy, mineral processing and hazardous waste treatment, ZK provides complete equipment and system solutions covering the entire process of phosphogypsum treatment.

Calcination system: Special rotary kiln for phosphogypsum, achieving crystal transformation and performance modification;

Grinding equipment: Gypsum mill, meeting different particle size requirements;

Drying and granulation: Drying machine and granulator assist in product standardization;

Auxiliary equipment: Crushers, feeders, dust collectors, coolers, etc. are all available, ensuring effective integration of the system.

The products are widely applicable in the fields of environmental protection, building materials, and chemical industry, helping to transform phosphogypsum into a valuable resource.

 5. Promote development through innovation and lead the industry forward

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ZK has always adhered to the concept of "seeking survival through quality and pursuing development through technology". It has established a research and development team and equipped a pilot production workshop, which enables conducting incoming material tests and process validations to ensure the feasibility of the technical solutions. Through continuous research and development, the company has made several breakthroughs in the field of solid waste resource utilization. The related technologies and equipment have been successfully applied to multiple projects both at home and abroad, and the products have been exported to countries such as Russia, South Korea, the United States, and Canada, earning wide recognition.

As a pioneer in the harmless treatment of phosphogypsum, Zhengzhou Mining Machinery is leveraging advanced technological equipment and systematic solutions to drive the transformation of industrial solid waste towards a green and circular model. In the future, the company will continue to focus on the environmental protection field and contribute more to achieving sustainable development.

Choose ZK and jointly build a waste-free future!