摘要
采用铬渣烧结矿作为熔剂，在３０ｍ３小高炉上进行了冶炼含铬生铁的工业化生产试验。铬渣中六价铬的还原率接近１００％，总铬的金属化还原率大于９４％；平均每吨产品铁吃渣量为２．２９８ｔ，最高达２．７８５ｔ。炼制含铅量大于１０％的含铬生铁，需同时配入铬铁矿增铬。保持１４８０Ｋ以上的炉温，控制较低的碱度，配入辅料降低炉渣熔点，可显著改善炉渣的流动性，成功地实现渣、铁分离排放。监测了试验过程的二次污染，需控制高炉煤气放散以降低生产性降尘。
A pilot study on the industrialized production of chrome pig iron was carried out in a small- sized blast furnace of 30m￣3 by using a sintered ore of chrome slag as flux. Cr (Ⅵ ) in chrome slag was reduced at a rate of near 100 % and more than 94 %of toeal chromium were reduced metallizationally.The consumption of slag per tonne of product iron was 2. 298t on average with the maximum of 2. 785t. For smelting a chrome pig iron containing more than 10% Cr, it was necessary to simultaneously add chromite in order to increase the level of chromium. By keeping the furnace temperature at over 1480K,controlling the alkalinity at a lower level and adding the subsidiary burden to reduce the melting point of furnace slag,the mobility of furnace slag was significantly improved that resulted in the successful separation of iron from slag. The secondary pollution during the pilot study was monitored and it was found that it was necessary to control the dispersion of blast furnace gas in order to reduce the deposition of dust from the production process.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1994年第5期31-34,64,共5页
Environmental Science
关键词
铬渣烧结矿
高炉
炼铁
含铬生铁
工业化生产试验
chrome slag, use of waste as a resource,blast furnace, iron smelting, chrome pig iron.
