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Jinhua Furnace’s industrial test firing of high-ash, high-ashtemperature coal from northern Shanxi was a complete success. Author/Source: Jinhua Furnace; Date: 2023-05-01; Clicks: 22. On April 27, 2023, a meeting to summarize the results of the industrial test firing using a slurry furnace for the large-scale gasification of coal from northern Shanxi was held at Fengxi Group in Yuncheng City, Shanxi Province. Leaders and experts from China National Coal Group Pingshuo Company, Fengxi Group, Lu’an Chemical Machinery Group, the Shanxi Clean Energy Research Institute of Tsinghua University, and Beijing Qingchuang Jinhua Technology Co., Ltd. attended the meeting. This marked a complete success in the industrial test firing of high-ash, high-ashtemperature coal in the slurry water-cooled wall gasification furnace (Furnace No. 4) operated by Fengxi Group’s Linyi branch. In mid-March 2023, 6,000 tons of coal from northern Shanxi was transported to Coal Shed No. 9 at the Linyi branch for separate storage. From mid-March to early April, laboratory tests and analyses were conducted to determine the plan for industrial trial firing. During the same period, Furnace No. 4 had its flux addition system restored and its water-coal slurry feeding system modified. On April 12, a meeting was held to initiate the industrial trial firing, which officially began at 16:00 on that day. Since the trial combustion began on April 12, a total of 8 phases, 7 operating conditions, and 2 72-hour tests using coal from northern Shanxi have been carried out. During this period, the gasification furnace operated continuously and stably without any interruptions, with a cumulative operating time of 360 hours (15 days); of this time, 240 hours was spent using 100% coal from northern Shanxi. A total of 6,000 tons of coal from northern Shanxi, 885 tons of coal from Shenmu, and 147 tons of limestone have been tested through cumulative firing. The gasifier operates stably as a whole, with smooth transitions between different operating conditions. Operating parameters such as slurry concentration and H2S content show a trend consistent with that of the coal blending ratio. The slurry concentration of 100% coal from northern Shanxi reaches 64–65%. The steam production of the water wall being below 2 t/h indicates stable slag formation when using high ash fusion point coal from northern Shanxi in the Jinhua furnace for gasification. During the industrial trial firing, through on-site process adjustments to optimize operating parameters, certain experience was gained in the processing of coal from northern Shanxi as well as in its control; the gasification characteristics of this coal in water-cooled wall gasifiers using water-coal slurry were initially understood, and the trial firing yielded good results. The industrial trial burn conducted this time demonstrates that the gasification of coal from northern Shanxi in water-cooled wall gasifiers for water-coal slurry is feasible.