Computer Simulation of Carbothermic Silica Reduction Processes
Computer Simulation of Carbothermic Silica Reduction Processes
复制标题
碳热二氧化硅还原过程的计算机模拟
DOI：
10.1149/1.2115581
复制
发表时间：
1984
影响因子：
3.9
通讯作者：
G. Eriksson
中科院分区：
文献类型：
--
作者：
T. Johansson;G. Eriksson
采用一种适用于具有逆流相的非平衡体系的模型，研究了几种不同类型的金属硅的非替代碳热还原工艺。所研究的工艺包括传统的硅弧炉、高压硅弧炉和一种称为启动炉（BF）的新工艺。结果表明，高压替代方案无法与传统加热炉竞争。高炉工艺能显著提高硅收率和产品纯度，但需要复杂的工艺设备。与传统工艺相比，研究的许多替代方法可能构成改进，但需要额外的实验结果作为结论性证据。传统的埋弧炉碳热还原二氧化硅为金属硅的工艺十分复杂。由于工艺区域内的高温，一些气体、液体和冷凝物质会参与化学反应。同时，化学环境使详细的实际调查几乎不可能。此外，控制内部热量和质量流动的不可行性意味着目前的工艺产量远远低于理论上可以达到的水平。硅生产的实践和理论方面已经在以前的一些出版物中进行了深入的讨论（例如，（1-4））。
Several types of aiternative carbothermic reduction processes for the production of silicon metal were studied by using a model which is applicable to nonequilibrium systems with countercurrently flowing phases. The processes studied include a conventional silicon arc furnace, a silicon arc furnace working at elevated pressures, and a new process called the boot furnace (BF) process. The results indicate that the high pressure alternative cannot compete with the conventional furnace. The BF process should give markedly higher silicon yields as well as a purer product but complicated process equipment is demanded. Many of the alternatives studied might constitute improvements compared with the conventional process, but additional experimental results are required for conclusive evidence.The conventional carbothermic reduction process of silica to metallic silicon in submerged arc furnaces is very complex. Several gaseous, liquid, and condensed species are involved in chemical reaction because of the high temperatures within the process area. At the same time the chemical environment makes a detailed practical investigation nearly impossible. Additionally, the infeasibility of controlling the internal heat and mass flows implies that the current process yields are far below the theoretically attainable. Practical and theoretical aspects of silicon production have been thoroughly discussed in several previous publications,(eg,(1-4)).