目前,我国镀锌低碳钢丝退火一般都采用单罐井式层煤燃烧炉,煤耗大、冒黑烟、钢丝质量不稳定、劳动强度大。因此,必须改造。近年来,苏皖两省已开始将煤粉喷射燃烧技术应用于镀锌低碳钢丝退火炉上,创造了新型节能炉型——四罐井式煤粉燃烧炉,节能效果显著. At present, China’s galvanized low-carbon steel wire annealing generally adopt single-well pit-type coal burning furnace, coal consumption, black smoke, unstable quality of steel wire, labor-intensive. Therefore, we must reform. In recent years, Jiangsu and Anhui provinces have begun to apply pulverized coal injection combustion technology in galvanized low-carbon steel wire annealing furnace, creating a new type of energy-saving furnace - four pot pit type pulverized coal combustion furnace, energy-saving effect is remarkable.