gmat报名专利名称：PRODUCTION OF MEDIUM- AND LOW-CARBON FERROMANGANESEfromm>nws
申请号：JP16262683
白莲翻译
申请日：19830906proportionate
公开号：JPH0355538B2
公开日：
日语骂人的话
19910823
专利内容由知识产权出版社提供
四级英语听力
摘要：PURPOSE:To produce low- and medium-carbon ferromangane with decread electric power consumption by putting the melt of high-carbon ferromangane into a reaction vesl having top and bottom blowing means, subjecting the melt to top blown decarburization refining by oxygen and stirring the melt by the bottom blowing gas. CONSTITUTION:The melt of the high-carbon ferromangane manufactured in a shaft furnace, electric furnace, etc. is put into a reaction vesl such as a converter or the like provided with top and bottom blowing means. Gaous oxygen in blown to the surface of the molten metal by a top blowing lance, etc. while quicklime, dolomite, the slag produced in the stage of manufacturing ferromangane or the like is added as a slag forming agent thereto, by which the molten metal is subjected to desiliconization and decarburization refining. At least one kind among gaous Ar, CO2, N2, etc. is blown from the bottom blowing means into the furnace at a ratio of 3-10vol. by 100vol. the amt. of the top blowing geous oxygen in terms of a standard condition to stir the molten metal and at the same time the molten metal is refined in a temp. range of 1,600-1,830 deg.C, by which the low- and medium-carbon ferromangane contg. 0.5-2% C is manufactured without the u of an electric furnace.
gpib
更多信息请下载全文后查看有关春节的英语作文>国庆节主题画
