工业氢氧化钙中氧化钙、氢氧化钙及碳酸钙测定方法的研究
收稿日期: 2019-11-10
网络出版日期: 2020-05-21
Study on determination of CaO,Ca(OH)2 and CaCO3 in industrial calcium hydroxide
Received date: 2019-11-10
Online published: 2020-05-21
苏少龙 , 曲晓龙 , 钟读乐 , 孙彦民 , 马月谦 . 工业氢氧化钙中氧化钙、氢氧化钙及碳酸钙测定方法的研究[J]. 无机盐工业, 2020 , 52(5) : 75 -77 . DOI: 10.11962/1006-4990.2019-0350
At present,most analytical methods are difficult to calculate the content of calcium oxide,calcium hydroxide and calcium carbonate in industrial calcium hydroxide.The combination of sucrose titration and thermogravimetric analysis was carried out to analyze CaO,Ca(OH)2 and CaCO3 in industrial calcium hydroxide.The content of available calcium in calcium hydroxide was determined by GB/T 5762—2012,Methods for Chemical Analysis of Limestone,Quicklime and Hydrated Lime for Building Materials Industry.Due to the difference in decomposition temperatures of calcium hydroxide and calcium carbonate,the content of calcium hydroxide and calcium carbonate in industrial calcium hydroxide was determined by ther-mogravimetric analysis.When the calcium hydroxide in the available calcium was deducted and the remainder was converted,the content of calcium oxide could be obtained.Thus,the contents of three substances,i.e.CaO,Ca(OH)2 and CaCO3,were obtained.And the rest parts were other impurities.This method has many advantages,such as relatively simple operation and a large variety of measured components.
Key words: industrial calcium hydroxide; CaO; CaCO3
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