By Wu Qiong and Wu Yanhong
(ECNS) -- In early spring, visitors are greeted by a modern industrial scene at the coal washing plant of Xinjing Company, a subsidiary of Huayang New Material Technology Group Co. (Huayang Group) in Shanxi Province. Spotless workshops, highly efficient intelligent equipment, and well-organized production lines present a vivid picture of modern industrial production. The intelligent control system monitors every stage of production in real time, significantly reducing coal dust and particulate matter in the air and greatly improving overall air quality.
"These improvements are the direct result of technological upgrades," said Zhang Jianli, chief engineer at the coal washing plant of Xinjing Company. Besides the improved working environment, production efficiency and coal washing capacity have also been enhanced.
Shanxi Province has been exploring multiple approaches for the green development of its coal industry, promoting the transformation of traditional industries and fostering the growth of emerging sectors. This has led to continuous improvement in the ecological environment.
Improving coal quality is essential for the survival and development of coal enterprises. In recent years, Huayang Group has implemented a strategy of full coal washing and high-quality coal production. Through technological upgrades of its coal preparation plants, the company has achieved comprehensive coal washing, further enhancing the value of commercial coal.
After being processed by a crusher, raw coal is crushed into uniform particles and transported through the dense medium separation system to the flotation machine. In the fine coal washing workshop, raw coal is transformed into clean energy through a series of processes.
According to Wu Hongbin, Technical Director of the Quality Management Center for Coal Preparation of Huayang Group, the company's fine coal washing capacity increased by 17 million tons after the technological upgrades. Compared to before the 2023 upgrades, the calorific value of fine coal rose by 164 kcal at the No.1 Mine and by 340 kcal at Xinjing Company. In January this year, the overall calorific value of the group's fine coal increased by 212 kcal year-on-year.
On computer screens, real-time data records key indicators such as raw coal production, clean coal yield, medium consumption, and coal quality. Daily reports on the fine coal blending system are automatically generated, allowing operators to precisely control the blending process with a click of the mouse.
As a key direction for the transformation and upgrading of the coal preparation industry, intelligent coal washing is leading the sector into a new era with its advantages of high efficiency, precision, and safety. The precise coal blending system upgrade is an integral part of Huayang Group's technological transformation project for its coal preparation plants.
"Now, we use an online ash analyzer and moisture analyzer to conduct quality inspections of raw coal before washing and clean coal after washing. A weigh feeder, intelligent gate, and belt scale are used for online quantity inspections. The coal blending software algorithm generates blending plans to control the washing rate and blending ratio of different products, improving coal quality stability," said Zhao Leqin, head of the technical team at the coal preparation plant of the No.2 Mine of Huayang Group.
Currently, the entire coal blending process of the fine coal system at this mine has been fully automated. Automatic data collection and analysis provide more intuitive guidance for underground production.
Making green the underlying color of high-quality development remains the guiding principle for coal enterprises in Shanxi Province. Through technological innovation and industrial upgrading, Shanxi's coal enterprises are promoting the development and utilization of clean and renewable energy, reducing carbon emissions in the coal mining and processing stages, and strengthening ecological restoration and environmental governance, striving to strike a balance between economic growth and environmental protection.
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