高铁菱锰矿制取硫酸锰的工艺研究

针对高铁锰矿无法充分利用的问题，实验对高铁菱锰矿为原料制备硫酸锰的工艺条件做了考察，重点解决了高铁菱锰矿在硫酸酸浸取过程中出现料浆黏稠、中和反应困难的问题。实验得到最佳工艺条件：浸取温度为90 ℃、液固质量比为5.5∶1、酸矿质量比为0.69∶1、浸取时间为2 h、过滤温度约为70 ℃。在此条件下，以高铁菱锰矿为原料制备硫酸锰的工艺可顺利进行，总锰收率比传统工艺提高5%~8%，过滤操作时间则缩短为传统工艺的1/3。

Study on preparation process of manganese sulfate with iron rich rhodochrosite

In view of unable to make full use of the iron rich rhodochrosite，the preparation process of manganese sulfate with the rhodochrosite has been investigated.Problems on slurry viscosity and difficult neutralization reaction in the process have been focused on.The optimal process conditions were obtained as follows: leaching temperature was 90 ℃，mass ratio of liquid to solid was 5.5∶1，mass ratio of sulphuric acid to rhodochrosite was 0.69∶1，leaching time was 2 h，and filtering temperature was about 70 ℃.Under these conditions，the preparation process could be carried out smoothly，total yield of Mn would be increased by 5%~8% and the filtering operation time would be shortened to 1/3 compared with the traditional technology.