降低转炉炼钢污泥熔点的试验研究  

Research on decreasing the melting point of BOF steelmaking sludge

作　　者：刘自民[1] 金俊[1] 江吉惠[1] 张芸[1] 钟素姣[2] 

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000 [2]马鞍山矿山研究院,安徽马鞍山243000

出　　处：《钢铁研究》2007年第3期20-23,共4页Research on Iron and Steel

摘　　要：以炼钢污泥作为主要原料，辅以其它配料，旨在造出高强度的污泥球（抗压强度不小于1500N），作为高炉用原料。对降低转炉炼钢污泥的熔点作了系统的研究表明，当B配比在10％～12％、C配比在5％～10％、干污泥配比在78％～85％时，污泥达到软化时的温度在1240℃左右；污泥的软化温度在降低到1238～1250℃时，其内部粘结相主要是铁酸钙和硅酸钙，并且铁酸钙与磁铁矿形成熔融交织结构；当物料配比碱度在4．5～5．0之间时，污泥的软化温度相对较低。This research aims at making high strength sludge ball （compressive strength ≥1 500 N） used for blast furnace production. Steelmaking sludge was chosen as main material to make the sludge ball with adding other accessorial materials. A systematic research of decreasing the melting point of BOF steelmaking sludge was carried out. The results showed that the sludge softened at about 1 240 ℃ in the condition containing Blend B 10%-12 %, Blend C 5%-10% and dry sludge blend 78%-85%; When the softening temperature of the sludge dropped to between I 238 ℃ and 1 250 ℃, the binding phase of the sludge was mainly composed of calcium ferrite and silicate, and a fusing-melting intertexture structure formed between calcium ferrite and magnetite; when the blend basicity was between 4. 5 and 5.0, the softening temperature of the sludge was comparatively low.

关 键 词：转炉污泥 降低熔点 物料配比碱度 

分 类 号：TF046[冶金工程—冶金物理化学]