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本文介绍采用“微氧化还原法”生产热镀锌钢管的万法、机理、设备设计、试验情况等。并与“溶(熔)剂法”中之“干法”工艺在三废、质量、产量、投资费用及消耗等主要经济指标方面作了比较。微氧化还原反应是在一种特制的炉内进行的。首先在800～900℃内烧去钢管表面的油污;然后在900～950℃内将钢管上的氧化铁皮和铁锈还原成纯铁;最后使钢管冷却至锌液温度以上约10～50℃进入镀锌锅中镀锌。还原性保护气体采用N_2与H_2的混合气体。炉内压力在 5～30mm H_2O。镀锌层经理化等测试后表明,其性能均优于用“溶(熔)剂法”生产的产品。
This article describes the use of “micro-oxidation reduction method” production of hot dip galvanized steel pipe method, mechanism, equipment design, test conditions. And with the “melting (melting) agent” in the “dry” process in the three wastes, quality, production, investment costs and consumption and other major economic indicators were compared. The microreoxidation reaction is carried out in a special furnace. First, burn the oil on the surface of the steel pipe at 800-900 deg.C; then reduce the scale and rust on the steel pipe to pure iron at 900-950 deg.C; and finally cool the steel pipe to about 10-50 deg.C above the temperature of zinc liquid. Zinc pot galvanized. Reducing protective gas using N2 and H2 mixed gas. Furnace pressure at 5 ~ 30mm H_2O. Galvanized layer manager tests show that its performance is better than the “melt (melt) method of” products.