The construction of the third dry quenching unit project at Jiu Xin Chemical Company has officially begun

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On March 17, the groundbreaking ceremony for the EPC general contracting project of the third dry quenching unit at Jiu Xin Chemical Co., Ltd., located within the premises of Zhongmei Jiu Xin Coking Co., Ltd. in Lingshi County, was held on a grand scale. This milestone represents a solid and crucial step forward for the company in its efforts to deepen its commitment to green development and improve the stability of coal chemical production processes. The third dry quenching unit that is now under construction represents an important strategic move by JiuXin Chemical to actively respond to the call for transformation and upgrading of the coking industry, thereby promoting the high-quality development of the company. The core of the project is to build a new dry quenching facility with a processing capacity of 140 tons per hour, aimed at supporting the company’s existing 2 million tons per year coking technology upgrade project. As the EPC general contractor for the project, Jigang Group International Engineering Technology Co., Ltd. will leverage its extensive technical expertise and rich industry experience to provide comprehensive support for the successful implementation of the project. As the construction contractor, Wuyi Group Shanghai General Contracting Company will ensure the project quality and schedule through its excellent construction skills and rigorous project management. According to the plan, the total construction period for this project is 12 months, with an intermediate handover scheduled for March 2027, at which point it will be ready to start producing red coke. This is not only a test of the project team’s efficiency and capabilities, but also a solemn commitment made by the company to the market and society. Focusing on technical advantages to drive green development, Coke Dry Quenching (CDQ) technology is a key process in the modern coking industry for achieving energy conservation and emission reduction as well as improving product quality. Compared with traditional wet quenching (direct cooling by spraying water), it uses inert gases to cool red coke at around 1000°C in a closed system, and efficiently recovers its sensible heat, achieving a win-win situation in terms of economic and environmental benefits. The completion and operation of this project will bring three key advantages to the company: energy savings and environmental protection, as the waste-to-resource dry quenching technology enables the recovery of approximately 83% of the sensible heat from red coke. For every ton of red coke that is extinguished, approximately 0.45–0.55 tons of medium-high pressure steam can be recovered; this steam can be used directly for power generation, thereby significantly reducing a company’s costs associated with purchasing electricity from external sources. At the same time, this process completely eliminates the release of steam containing toxic and harmful substances such as phenols and cyanides during the wet quenching of coke, thereby reducing air pollution at its source. It is estimated that, on a similar scale, dry quenching of coke can reduce carbon dioxide emissions by tens of thousands of tons per year and save a large amount of water resources, serving as a solid foundation for the company to establish itself as an A-grade coking enterprise. Improving quality and enhancing competitiveness: Dry quenching is a slow, uniform cooling method that effectively prevents the internal stress cracks in coke that occur as a result of rapid cooling in wet quenching. Therefore, the coke produced by dry quenching has higher mechanical strength (the M40 value can increase by 3%-8%) and lower reactivity, making its quality significantly superior to that of coke produced by wet quenching. High-quality coke can reduce the coke ratio in blast furnace iron production, improve the efficiency of blast furnaces, and command a higher premium in the market, thereby directly enhancing the core competitiveness of the company’s products. Resource conservation and cost reduction lead to improved efficiency: in addition to generating direct economic benefits through the recovery of heat energy, the dry quenching process itself consumes almost no fresh water, requiring only a small amount of boiler make-up water; thus, it allows for the savings of around 0.5 tons of water per ton of coke, compared to wet quenching. This is undoubtedly an important strategic advantage in today’s world where water resources are becoming increasingly scarce. Through the recycling of energy and the efficient conservation of water resources, the project will bring the company sustained and significant cost reduction and efficiency improvement benefits.