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由我厂承制的年产30万吨合成氨48万吨尿素装置中的原料气压缩机驱动透平机,系贵州赤水天然气化肥厂的增压工程。其蒸汽室系整体铸件,结构复杂,铸件几何尺寸、光洁度要求高,内腔不得有残留型砂、缩裂、冷隔、重皮、疏松等缺陷,铸造困难很大。经研究决定将蒸汽室改为铸焊结构。蒸汽室结构的修改整体铸造蒸汽室的主要问题是:结构复
The raw material gas compressor driven turbo-machine, which is an annual output of 300,000 tons of synthetic ammonia 480,000 tons urea plant, is supercharged by Guizhou Chishui Natural Gas Fertilizer Plant. The steam chamber of the overall castings, complex structure, casting geometry, high finish requirements, the cavity may not have residual sand, shrinkage, cold, heavy skin, loose and other defects, casting a great difficulty. After the study decided to change the steam chamber cast-welded structure. Steam room structure modification The overall casting steam chamber is the main problem: complex structure