高炉含锌粉尘综合利用的研究.pdfVIP

1高炉含锌粉尘综合利用的研究 孟 巍 王传琳 （本钢集团北营炼铁厂，本溪 117017 ） 摘 要 本文研究了采用高温还原焙烧方法处理高炉含锌粉尘的相关问题。针对高炉除尘灰的基本性质，采用了高 炉粉尘配加铁精矿和煤粉，造球后高温焙烧的路线。通过预实验确定重力灰、布袋灰、铁精矿的比例为 1 ∶1 ∶8。 设计正交实验，考察了焙烧温度、焙烧时间、球团碱度、配煤量和煤种 5 个因素对球团脱锌率和金属化率的影响， 确定了高炉含锌粉尘处理的最佳工艺参数：焙烧温度 1300℃，还原 50min，配 10%的无烟煤，控制碱度为0.8；结 合实验结果及实际生产的条件，推荐的工艺参数为焙烧温度 1200℃，焙烧时间30min，配加 15%的无烟煤，球团碱 度为 0.8 。 关键词 含锌粉尘 高温焙烧 金属化率 脱锌率 Study on the Utilization of Zinc-bearing Dust in Blast Furnace Meng Wei Wang Chuanlin (Benxi-Beiying Iron and Steel Group, Benxi, 117017) Abstract The related issues of treating zinc-bearing dust in blast furnace by high-temperature calcinations method were studied in this paper. According to the basic properties of the blast furnace dust, the process of mixing iron ore concentrate and coal into blast furnace dust and high-temperature calcinations after pelletizing was adopted. The ratio of gravity dust, bag dust and iron ore was 1:1:8, which determined by pre-test. The five factors of calcinations temperature, calcinations time, pellet basicity, coal amount and coal type on dezincification rate and metallization rate were determined by orthogonal experiment and the optimum parameters were defined: reduction temperature 1300℃, reduction time 50min, mixing 10% anthracite and the basicity controlled to 0.8. Combined with the orthogonal experiment results and actual industrial production, the parameters of temperature 1200 ℃, reduction time 30min, mixing 15% anthracite and the basicity controlled to 0.8 were recommended. Key words zinc-bearing dust, high-temperature calcinations, metallization rate, dezincification rate 钢铁厂含锌粉尘的种类很多，这些粉尘因其产出途径不同，其化学成分也有所差异，一般除了锌元素外， 还含有较高的铁和碳等可回收资源。但是锌元素在高炉内循环富集，不但容易形成炉瘤，破坏炉衬，影响高 炉寿命；还会破坏炉料强度