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为了落实毛主席“要迅速改变北煤南运”的伟大战略方针,我厂坚持用煤粉化铁炉生产球墨铸铁。在产品中有4135型柴油机的曲拐、凸轮轴、齿轮,水轮机的导叶、转轮、轴瓦;水泵的联轴器、轮壳、叶片以及部分来料加工。球铁牌号有QT50-1.5和QT40-10。经过使用考验,性能良好。现将生产过程介绍如下: 一、熔化设备 2.5吨立式煤粉化铁炉2座,内有热风炉胆、水冷套装置。使用广东梅田白煤粉,其成份是:挥发物5～8％,灰粉22～28％,固定碳60％,水份3.5％。其发热量6000大卡/千克、粒度200目、铁水温度1370°～1420℃,熔速2.2～2.6吨/小时,焦铁比1:6.5。
In order to implement Chairman Mao’s “great strategy of rapidly changing North coal south transport,” our factory insisted on the production of ductile iron with a pulverized iron furnace. 4135 Diesel products in the crank, camshafts, gears, turbine guide vanes, runners, bearings; pump coupling, wheel shell, leaves and some of the processing. Ductile iron grades QT50-1.5 and QT40-10. After using the test, good performance. Now the production process is as follows: First, the melting equipment 2.5 tons of vertical coal iron furnace 2, there are hot air oven gall, water-cooled device. The use of Guangdong Umeda white coal powder, its ingredients are: Volatiles 5 to 8%, ash 22 to 28%, fixed carbon 60%, water 3.5%. The calorific value of 6000 kcal / kg, particle size 200 mesh, hot metal temperature 1370 ° ~ 1420 ℃, melting rate of 2.2 ~ 2.6 tons / hour, iron and iron ratio of 1: 6.5.