石油炼厂加热炉管架、砖架等耐热铸件,国外用镍、铬合金铸铁(苏联用含铬合金铸铁;美国用含镍、铬或镍、铜的密烘铸铁)及高镍铬合金钢(铬25镍12)制成。过去一直从国外进口。为了反击帝、修、反的经济封锁与技术垄断,我们遵照伟大领袖毛主席关于“独立自主、自力更生”、“打破洋框框,走自己工业发展道路”的伟大教导,试制成功了稀土—镁—硅耐 Oil refinery heating pipe rack, brick and other heat-resistant castings, foreign with nickel, chrome cast iron (the Soviet Union with chromium alloy cast iron; the United States with nickel, chromium or nickel, copper bake cast iron) and high nickel-chromium alloy Steel (Chromium 25 Nickel 12). In the past has been imported from abroad. In response to the great teachings of Chairman Mao on “independence, self-reliance,” “breaking the framework of the world and following the path of our own industrial development,” we successfully tried out the rare earth-magnesium-silicon Resistance