论文部分内容阅读
我厂铸铁车间系从事单件小批生产,铸件品种多,铸铁牌号有普通灰铸铁、高强度铸铁(抗拉强度为28公斤/毫米~2)、球墨铸铁、各种耐热合金铸铁等。铸件特点是壁薄(最小壁厚仅3毫米)而长(如省煤器管最长达3.6米),大多数铸件除须符合化学成分与物理性能要求外,尚须经25～40公斤/毫米~2水压试验。因此,对冲天炉熔炼工作要求很高。强化冲天炉熔炼的主要目的是:在获得最适当的高温铁水的条件下提高生产率、延长连续工作时间、增加冲天炉热效率、保证化学成分、减少金属烧损、降低燃料消耗。
Our factory cast iron workshop engaged in a single small batch production, casting varieties, cast iron grades are ordinary gray cast iron, high strength cast iron (tensile strength of 28 kg / mm ~ 2), ductile iron, all kinds of heat-resistant alloy cast iron. Castings are characterized by thin wall thickness (minimum wall thickness of only 3 mm) and long (such as economizer tube up to 3.6 meters), most castings in addition to meet the chemical composition and physical properties, but also by 25 to 40 kg / Mm ~ 2 hydrostatic test. Therefore, the cupola melting work demanding. The main purpose of strengthening cupola melting is to improve productivity, extend continuous working time, increase thermal efficiency of cupola, ensure chemical composition, reduce metal burning and reduce fuel consumption under the most appropriate high temperature hot metal.