论文部分内容阅读
本实验通过矿物MLA分析发现:稀土尾砂中长石含量较高,而且稀土尾砂样品中高岭土和石英矿物都包含云母和磁铁矿,大量的稀土尾砂单独引入配方中易造成坯体烧成过程中液相集中在较小的温度段内大量出现。实验利用南方稀土尾砂为主要原料,并辅以多种熔剂型原料,成功制备出了稀土尾砂用量大于40wt.%、能在1100℃以下烧结、且性能符合并部分高于国家玻化砖标准的样品。实验结果表明:选择合适的多元复合熔剂系统,可以明显降低瓷坯中出现液相的始熔温度,使坯体提前进入烧结阶段,并且液相梯度缓慢出现在坯体中,能有效解决单独使用稀土尾砂造成产品变形大、烧成温度范围窄等关键技术难题。
MLA analysis of the mineral found in this experiment: the higher the content of feldspar in rare earth tailings, and rare earth tailings samples contain both kaolin and quartz minerals mica and magnetite, a large number of rare earth tailings alone can easily lead to burn the formula In the process of liquid concentration in a small number of temperature appeared in large sections. Experiments using the southern rare earth tailings as the main raw material, supplemented by a variety of flux-based raw materials, the successful preparation of the amount of rare earth tailings greater than 40wt.%, Can be sintered below 1100 ℃, and the performance is consistent and part of the higher than the national glass brick Standard sample. The experimental results show that choosing appropriate compounding flux system can obviously decrease the initial melting temperature of the liquid phase in the ceramic billet and advance the billet into the sintering phase ahead of time, and the liquid phase gradient slowly appears in the billet, which can effectively solve the problems of single use Rare earth tailings product deformation caused by large, narrow temperature range of firing and other key technical problems.