以电炉还原渣和熟石灰制备高炉炉顶煤气脱氯剂  

Preparation of Dechlorinating Agent for HCl Removal from Blast Furnace Top Gas with Reducing Slag of EAF and Slaked Lime

作　　者：胡学武 胡宾生 贵永亮 胡桂渊 Hu Xuewu;Hu Binsheng;Gui Yongliang;Hu Guiyuan(College of Metallurgy ＆ Energy,North China University of Science and Technology,Tangshan,Hebei,Chin)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063009

出　　处：《矿产综合利用》2018年第4期83-86,136,共5页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金资助项目(51274080)

摘　　要：用电炉还原渣和熟石灰为主要活性成分制备高炉炉顶煤气脱氯剂:研究了电炉还原渣含量、电炉还原渣粒度、聚乙二醇含量对脱氯剂脱氯性能和机械强度的影响,并得到了脱氯剂较为适宜的制备工艺。通过固定床脱氯试验表明:电炉还原渣的存在削弱了高炉煤气中CO_2气体对脱氯剂性能的不利影响,电炉还原渣的粒度适当降低可以改善脱氯剂的性能;适当比例的聚乙二醇可以改善脱氯剂的孔隙结构,提高脱氯剂化学性能并保持较高机械强度。脱氯剂的较为适宜的制备工艺为:电炉还原渣的含量控制在12%左右,电炉还原渣粒度控制在38μm左右,聚乙二醇的含量控制在7.5%左右,各种原料混合均匀,加适量去离子水混匀,挤条成型,烘干后在400℃温度下焙烧制得。较为适宜的工艺条件下制得的脱氯剂在20.67 h后的穿透氯容量达到18.61%,同时机械强度达到了61.5 N/cm。降低了脱氯剂成本,开辟了电炉还原渣综合利用的新途径。The electric reduction slag and slaked lime as the main active ingredients were used for preparing blast furnace top gas dechlorinating agent. The effect of electric arc furnace （EAF） reduction slag content, EAF reduction slag particle size, content of polyethylene glycol on dechlorinating sorbent for the removal of chlorine resistance and mechanical strength was studied and the preparation process of the more suitable for the removal of chlorine was obtained. Through the fixed bed dechlorinating the test showed that EAF reduction slag can weaken the adverse effect of CO2 gas in blast furnace gas dechlorinating agent performance, and the granularity of the reduction slag of the electric furnace can be reduced to improve the performance of the agent., the proper proportion of polyethylene glycol can improve the pore structure of the dechlorinating agent and improve the chemical properties of the dechlorinating agent and maintain a relatively high mechanical strength. Dechlorinating agent suitable preparation process is as follows： the content of slag furnace is about 12%, the electric furnace slag particle size is about 38 m, the content of polyethylene glycol is about 7.5%, various ingredients is mixed evenly, appropriate amount of deionized water is added for mixing, extruding, and is dried at 400 ~C to roast. For the dechlorinating agent prepared under the optimum conditions, the chlorine content of the system was 18.61% after 20.67 h, and the mechanical strength of the system was 61.5 N/cm. The new method of comprehensive utilization of the slag of electric furnace is opened up by reducing the cost of the dechlorinating agent.

关 键 词：电炉还原渣 氢氧化钙 高炉炉顶煤气 脱氯剂 

分 类 号：TD989[矿业工程—选矿]