The chemical industry in China is a major source of organic pollutants that contaminate the water environment. These types of wastewater are often treated using single destruction methods, which are not only expensive but also inefficient in resource utilization. In contrast, integrated processing technologies that focus on resource recovery have gained significant attention due to the principles of the circular economy. A prime example is the 2007 National Technological Invention Award-winning project titled "New Technologies for the Treatment and Recycling of Water-Soluble and Hard-to-Degradable Organic Pollutants." This project has played a crucial role in promoting clean production within China's organic chemical industry. To date, this technology has been successfully implemented in eight companies, including Jiangsu Yangnong Chemical Group Co., Ltd., with 12 industrial wastewater treatment plants now operating. The project has significantly reduced toxic organic matter, with approximately 10,000 tons of COD eliminated annually. Moreover, around 40,000 tons of chemical products have been recovered each year, leading to cumulative tax revenue and cost savings of about 110 million yuan over the past three years. Led by Academician Zhang Quanxing from Nanjing University’s School of Environment, the project has focused on understanding the adsorption mechanisms of organic pollutants using resin-based materials. Through innovations such as optimizing resin structures, controlling pore sizes, and modifying surface chemistry, new generations of adsorbents were developed. Based on these resins, several patented technologies for the treatment and recycling of difficult-to-degrade organic pollutants were created. Their widespread application has brought substantial environmental and economic benefits, contributing significantly to the goal of building a resource-efficient and environmentally friendly society. Since the 1980s, the team led by Academician Zhang has been dedicated to treating and recycling chemical wastewater. They developed high-specific-surface, ultra-cross-linked adsorbent resins, which have been successfully applied in treating pollutants like phenols and aromatic carboxylic acids. Their work opened new pathways in the field of toxic organic waste treatment and earned them the Second Prize of the 2001 National Science and Technology Progress Award. However, challenges remain. The organic chemical industry—including pesticides, dyes, and pharmaceuticals—produces complex and diverse wastewater, with most pollutants being water-soluble. Traditional adsorbents, such as macroporous resins or activated carbon, have limited adsorption capacity and selectivity for these substances. Additionally, while some materials perform well for volatile organic compounds, their regeneration often requires costly organic solvents or steam, which can damage the structure of the adsorbents. To address these issues, Academician Zhang and his team further advanced the technology. They designed and synthesized composite functional resins with both hydrophobic and hydrogen-bonding (or electrostatic) properties, enabling effective adsorption of water-soluble organics. Their innovative resin-based processes have solved long-standing technical challenges, such as low adsorption efficiency, poor selectivity, and structural collapse during regeneration. These breakthroughs have enabled the effective treatment and resource recovery of water-soluble and refractory organic pollutants. The key innovation of this achievement includes a method for the selective separation and recovery of water-soluble organics in high-salt wastewater systems, along with the development of advanced resin-based technologies for treating high-concentration, high-salt, and refractory organic wastewater. By integrating resource recovery techniques, this approach has made it possible to treat such wastewater economically and effectively over the long term. Another breakthrough is the method for separating and recovering volatile and hard-to-degrade aromatic hydrocarbons, using water vapor to regenerate resins in highly acidic or alkaline solutions. This has enabled clean production in the chlorobenzene industry, marking a significant step forward in sustainable environmental management.

Graphite Mould

At our factory outlet, we offer a wide range of hot-selling graphite moulds for casting. These moulds are manufactured using high-quality graphite materials, ensuring durability and long-lasting performance. Our graphite moulds are designed to withstand high temperatures and provide excellent dimensional accuracy for producing high-quality castings.

Some of our popular graphite moulds for casting include:

1. Graphite Ingot Moulds: These moulds are used for casting metal ingots, such as gold, silver, and other precious metals. They come in various sizes and shapes to accommodate different casting requirements.

2. Graphite Crucibles: Crucibles are essential for melting and pouring molten metal into moulds. Our graphite crucibles are highly resistant to thermal shock and have excellent heat retention properties.

3. Graphite Dies: Dies are used for casting complex shapes and intricate parts. Our graphite dies are precision-machined to ensure accurate and repeatable casting results.

4. Graphite Plates: Plates are used for casting flat or thin metal parts. Our graphite plates are available in various thicknesses and sizes to meet different casting needs.

5. Graphite Rings: Rings are commonly used for casting cylindrical or round-shaped metal parts. Our graphite rings are highly durable and can withstand high temperatures and pressures.

All our graphite moulds are carefully crafted to meet the highest quality standards. They undergo rigorous quality checks to ensure they are free from defects and can provide consistent and reliable casting results.

If you are looking for high-quality graphite moulds for casting, visit our factory outlet to explore our wide range of hot-selling products. Our knowledgeable staff will assist you in finding the right moulds for your specific casting requirements.

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Yixing Xingfeng Carbide Mould Co.,LTD , https://www.xfcarbidemould.com