Use of online electrical conductivity meter to monitor cold decomposition of carnallite  

应用在线电导率仪监测光卤石冷分解过程(英文)

作　　者：王晓波 侯元昇 李辉林 

机构地区：[1]国家盐湖资源综合利用工程技术研究中心青海盐湖工业股份有限公司,青海格尔木816000

出　　处：《Journal of Measurement Science and Instrumentation》2015年第2期185-189,共5页测试科学与仪器（英文版）

摘　　要：Online control of the ratio of carnallite to water is a key to achieve a fully continuous and automatic potash produc tion. By monitoring carnallite cold decomposition process using online conductivity meter, the relationship between the conduc tivity and the control parameters was analyzed based on the data collected online. The results show that the conductivity regu larly varies with a general trend of decrease after an initial increase when the ratio of mineral to water is adjusted. There are certain rules satisfying cubic polynomial regression equation. When the ratio of mineral to water is larger than 0. 6, with the a mount of carnallite increased by 10%, the conductivity decreases by 0. 28%-0. 45% accordingly and the relative deviation is less than 0. 5%. The value of electrical conductivity has stabilized when the density of liquid increased to 1.27 g/cm3, namely, the solution reaches saturation. It has proved that the methods can be employed for online monitoring the ratio of carnallite to water during carnallite cold decomposition and the precise control has an important value for reference and application.

关 键 词：electrical conductivity meter CARNALLITE cold decomposition 

分 类 号：TS396.1[轻工技术与工程] TQ443[化学工程—化学肥料工业]