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我厂主要生产减速机体、风机铸件、伐体、注油器及运输机械的铸件毛坯。铸件品种达200余种,最大件有八吨,最小件0．5公斤。铸件材质要求在15~33和20~40之间。我厂原有一座四吨冷风冲天炉,铁焦比平均为6∶1,温度仅在1340~1370℃左右,因材质达不到要求、浇注温度低造成的废品达30%以上。为改变这一状况,一年来在上级党委的关怀和局技协的直接帮助下,厂革委会组织了三结合小组,发动群众改炉节焦,铁焦比由6∶1提高到13~14∶1,与去年同期比,节约焦炭178吨;铸件废品率由14%下降至6%。收到了高温、优质、低耗的效果(改后的冲天炉技术参数见表1)。
I plant mainly produces reducer body, fan castings, cutting body, oiler and transport machinery casting rough. Casting varieties of more than 200 species, the largest pieces of eight tons, the smallest pieces of 0.5 kg. Casting material requirements in the 15 ~ 33 and 20 ~ 40 between. I plant a four-ton cold cupola, iron coke than an average of 6: 1, the temperature is only about 1340 ~ 1370 ℃, due to material requirements, pouring low temperature caused by more than 30% of waste. In order to change this situation, with the direct help of the party committee of higher education and the CAPSA over the past year, the Plant Revolutionary Committee organized a three-in-a-small group to mobilize the masses to reform the furnace coke and improve the iron coke ratio from 6: 1 to 13 ~ 14: 1, compared with the same period of last year, saving 178 tons of coke; casting scrap rate dropped from 14% to 6%. Received a high temperature, high quality, low-cost effect (after changing the cupola technical parameters in Table 1).