论文部分内容阅读
从技术上总结 2 0世纪湿法磷酸的发展 ,并展望新世纪的工作。2 0世纪中 ,首先在技术上对二水物流程做了大量的巩固与提高 ,使其大型化 ;其次继续开发了 5种新流程 ,但经过筛选只剩下二水 /半水再结晶流程及半水 /二水浓酸 (二步法 )流程 ,其中尤以后者更为理想。该文对半水 /二水流程从运转、过滤、试验结果以及经济指标等作了较为详细的介绍。并提出了 1 0个可供开发的湿法磷酸生产流程供参考 ,经过比较 ,认为只需把二水 /半水与半水 /二水 2个较好的流程继续完善及提高。
From the technical summary of wet-process phosphoric acid in the 20th century, and look forward to the work of the new century. In the 20th century, first of all, a great deal of consolidation and improvement of the dihydrate process was done technically, resulting in its enlargement. Secondly, five new processes were continuously developed, but only the di / semi-aqueous recrystallization process was screened And semi-water / two concentrated acid (two-step) process, of which the latter is more ideal. This paper gives a detailed introduction of the semi-water / two-water process from operation, filtration, test results and economic indicators. And put forward 10 production processes of wet-process phosphoric acid for reference. After comparison, it is considered that only two good processes, di / semi-water and semi-water / dihydrate, should be further improved and improved.