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日本川崎钢铁公司于1994年7月份开发成功“粉尘精炼炉”(高42m.内容积140m~3,投资70亿日元).经过了6个月的运转,已达到预定日产140t的目标.这种炉子是专用来还原炼钢、轧钢过程中产生的粉尘并回收金属.该工艺的优点是,金属回收率可提高6%,而且可利用以往不能用的轧钢系统水处理污泥,可提高Cr、Ni等贵重元素的回收率.钢铁厂产生的粉尘,以往是经过团块后供给高炉、转炉用.金属回收率低.而新工艺的特点是将粉状尘埃直接吹入专用处理炉内,用焦炭将它们还原成金属.千叶厂第四炼钢车间是生产特殊钢(包括不锈钢)的,粉尘中含有许多贵重金属,而且是用转炉、采用直接向炉内投入铬矿石的熔态还原法炼不锈钢,因此粉尘发生量多.为此,该公司建设了直接与第四炼钢车间连接的“粉尘精炼炉”.炉子投产后,金属收得率从原来的90%提到96%,轧钢水处理系统的污泥也可以再利用.因此,有
Japan Kawasaki Iron and Steel Company in July 1994 developed a successful “dust refining furnace” (high 42m. Internal volume of 140m ~ 3, invested 7 billion yen.) After 6 months of operation, has reached the scheduled Nissan 140t target. The furnace is designed to reduce the dust generated in the steel making and rolling process and recover the metal.The advantage of this process is that the metal recovery rate can be increased by 6%, and the sludge can be treated with the rolling system which can not be used in the past, , Ni and other precious elements of the recovery rate of dust produced by steel mills in the past after the cakes supplied to the blast furnace converter used metal recovery is low and the new process is characterized by powder dust directly into the special treatment furnace, With coke to restore them to metal.Qiba Plant fourth steelmaking plant is the production of special steel (including stainless steel), the dust contains many precious metals, and is the use of the converter, the furnace directly into the use of chromium ore molten state reduction Therefore, the company built a “dust refining furnace” that is directly connected to the fourth steelmaking plant. After the furnace was put into operation, the metal recovery rate was 96% from the original 90% Rolling water treatment system sludge also For reuse. Therefore,