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在过磷酸钙(普钙)生产中,65-75％稀硫酸是主要原料之一。我厂普钙车间生产上所需65-75％硫酸,大部分用浓酸配水稀释而得,还有一部分是其他化工车间所弃废酸,其中含有少量稀硝酸,故酸品质较差,对于用电导法进行测量有很大影响,所以65-75％稀酸测量问题在我厂长期没有得到解决。1972年年底,我们重新对生产用酸品质进行分析,认为从测量比重变化来反映浓度变化的方法较好,符合实际操作情况。测量比重的方法有:吹气法,配以差压计远传;
In superphosphate (calcium) production, 65-75% sulfuric acid is one of the main raw materials. I workshop Cape calcium workshop on the required 65-75% sulfuric acid production, most diluted with concentrated acid water derived, as well as part of the other chemical plant discarded waste acid, which contains a small amount of dilute nitric acid, so the acid quality is poor, for Conductance method has a great impact on the measurement, so 65-75% diluted acid measurement problems in our plant has not been resolved. At the end of 1972, we re-analyzed the quality of acid used in production. We think that the method of reflecting the change of concentration from the measurement of the change in proportion is good and in line with actual operation. The method of measuring the proportion of: inflatable method, together with the differential pressure gauge Far EasTone;