The coal blending project using acid tar and tar residue from Shanxi coking plants has passed the acceptance inspection

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After two years of intensive efforts, the technical upgrade project of Shanxi Coking Company, namely the coal blending project using acid tar and tar residue, was officially approved for completion on November 1. Once operational, this project achieves zero emissions of acid tar and tar residue while ensuring the quality of coke, thereby reducing environmental pollution. It also helps to lower the cost of raw coal, generating an annual direct economic benefit of 3.5 million yuan. The treatment of waste oil and waste residues is a major challenge for coking enterprises. At present, our company generates 6,500 tons of waste oil and waste residues each year, which have been disposed of by filling them in landfills or exporting them; however, the results of these disposal methods are not satisfactory. Starting in December 2005, Ma Enze, who was then the head of the Science and Technology Department, as well as the plant manager, party secretary, and chief engineer of Coking Plant No. 1, began carrying out experiments. In 2006, the project of using acid tar and tar residue in coal blending was officially designated as a technical improvement project by the company. Ma Enze was appointed as the project leader, and a project team composed of Meng Xiufang, Yao Zhenhuai, Tao Jianping, and others began to work on addressing the technical challenges involved. After nearly two years of trial and error, the project team finally identified the optimal ratio of coal, acid tar, and tar residue, successfully resolving the caking issue associated with tar residue. In July this year, a coal blending plant for mixers, with an investment of over 1 million yuan, was completed and put into operation. After rigorous evaluation by the Production Technology Department, the entire coal blending process operates smoothly, with uniform discharge of the blended coal. On September 6, mixed coal was blended with coal intended for furnace use in the coking process; quality control analyses showed that the quality of the coke was not affected. According to Ma Enze, the project leader, using oil residues as a substitute for coal for firing can save more than 6,000 tons of coal per year, resulting in cost savings of around 3.5 million yuan. The successful completion of this project not only resolved the problems associated with the treatment of acid tar and tar residue, but also enabled the treatment of more than a dozen types of solid waste, generating economic and social benefits and making a positive contribution to the company’s advancement of a circular economy. Short comment: The handling of acidic tar and tar residues is a major challenge that hinders environmental protection efforts in both this company and the entire coking industry. The successful completion of this project not only marks a new milestone in the company’s environmental protection efforts but also fills a gap in the coking industry. This fully reflects the spirit of the company’s technical staff, who are grounded in production practices and strive to reach new heights in technology. Pan Deguo, the company’s chairman, has repeatedly emphasized that the challenges in production are precisely the issues that technical personnel should work on to solve. It makes it clear to us that at Shanjiao, the production front is the only stage where technical professionals can make contributions and realize their value. Only by devoting themselves fully to the front lines, staying close to where production takes place, thinking about what is needed for production and addressing its challenges promptly, and by making full use of their intelligence to actively solve various problems that arise in production, can scientific and technical experts transform advanced technologies into tangible economic benefits, thereby providing continuous momentum for the sound and rapid development of Shanxi Coking Coal. 1. Under the conditions of bulk top-loading coal processing, it is technically feasible to use 3%-5% tar residue as a substitute for 1/3 of the coking coal in coal blending for coking ； 2. When tar residue is used for coking, the lump formation tendency of the resulting coke increases significantly. Additionally, to ensure the quality of the coke, it is crucial to control the particle size of the tar residue (85% should be at 0.2 mm) ； 3. Using tar residue in coal blending for coking not only solves the environmental pollution problem caused by the accumulation of tar residue but also saves energy, achieving the goal of secondary energy utilization. Meanwhile, by replacing part of the coking coal with tar residue, it provides a way for coking plants to reduce costs and increase efficiency.