锌浸出渣挥发窑窑衬破损机理的研究

• 作 者: 韩至成 王善道 夏岩和
• 机 构: 北方工业大学冶金技术研究所,北方工业大学冶金技术研究所,北方工业大学冶金技术研究所
• 出 处: 北方工业大学学报
• 发表日期: 1993年01期
• 关键词: 浸出渣 破损机理 窑窑 窑衬 酸浸 机械磨损 镁砖 炉料 侵蚀机理 带边

本文对锌浸出渣挥发窑窑衬破损机理进行了系统研究.研究表明,镁砖窑衬的侵蚀机理主要是酸浸渣在高温下向镁砖内部逐步渗透,使砖衬的已变带与渣带接触处形成大量的Fe_3O_4+FeO及FeO_2O_3,导致已变带边部的MgO颗粒大多沿晶界处被剥落下来,使酸浸渣沿缝隙贯入,造成MgO颗粒分解,由于有的颗粒表面形成两组垂直解理,砖的结构就变为疏松,严重部位已被熔融成孤立的港湾状,这样窑衬就会在炉料的机械磨损下不断被破损.

In this paper, the mechanism of kiln liner lining of zinc leaching residue volatilization kiln was studied systematically.The results show that the erosion mechanism of kiln kiln lining is that acid leaching residue infiltrated to the inside of magnesium bricks at high temperature gradually, Resulting in a large number of Fe 3 O 4 + FeO and FeO 2 O 3 formed at the contact points. As a result, most of the MgO particles at the edges of the strained zone are peeled off along the grain boundaries, causing the acid leachate to penetrate along the gaps, resulting in the decomposition of MgO particles. Group vertical cleavage, brick structure becomes loose, serious parts have been melted into an isolated harbor-shaped, so kiln lining will be constantly under the mechanical wear and tear of the burden was damaged.