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中国金属学会和冶金部钢铁司联合举办的竖炉球团学术讨论会于1981年12月11日至17日在杭州召开.会上主要由冶金部杭钢竖炉调查组介绍“杭钢竖炉与酸性球团的调查报告”.内容包括:杭钢竖炉球团生产情况;球团与烧结生产技术经济指标分析;酸性球团的冶炼效果;球团质量与机理;球团竖炉大型化等.与会代表就上述内容进行了广泛讨论.杭钢8米~2竖炉于1970年投产.由于结块与设备问题多,未能连续生产.1972年增设导风墙与烘干床新技术以及采取其他改进措施后,开始好转.1978年加膨润土生产酸性球团,产量逐年提高.1980年年产量突破30万吨,竖炉利用系数4.83吨/米~2小时,达到国内先进水平.球团矿质量较好.理化性能:抗压强度>200公斤/个球,转鼓强度>90%;Fe～55%;FeO<2%;S<0.03%,MgO4～6%,CaO/SiO_2～0.3,成份稳定;粒度较均匀,
China Metals Society and the Ministry of Metallurgical Division Steel shaft pellet joint seminar held in December 11, 1981 to 17 in Hangzhou held at the meeting mainly by the Ministry of Metallurgical Hang Steel furnace shaft survey group Furnace and acid pellets investigation report. "Contents include: Hangzhou Iron and steel shaft pellet production; pellet and sintering production technology and economic indicators analysis; smelting effect of acid pellets; pellet quality and mechanism; pellet shaft furnace Etc. The participants discussed extensively the above contents.Hangang Iron and Steel 8 m ~ 2 shaft furnace put into operation in 1970. Due to the large number of caking and equipment, failed to continuous production .In 1972, an additional wind wall and drying bed New technology and other improvement measures began to improve after the production of acidic bentonite pellets in 1978, the output increased year by year in 1980, the output exceeded 300,000 tons, shaft furnace utilization factor 4.83 tons / m ~ 2 hours, reaching the advanced level in China The quality of pellets is better Physical and chemical properties: compressive strength> 200 kg / ball, drum strength> 90% Fe ~ 55% FeO <2% S <0.03% MgO 4-6% CaO / SiO_2 ~ 0.3, stable composition; more uniform particle size,