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Method for measuring calcium sulfate in desulfuration gypsum

A determination method and desulfurization gypsum technology, applied in the field of environmental analysis and monitoring, can solve the problems of cumbersome and time-consuming operation, affecting the popularization of desulfurization process, and greatly affecting the operation level of analysts, so as to improve desulfurization efficiency and ensure environmental protection effects. easy effect

Active Publication Date: 2010-10-06
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

The operation is also extremely cumbersome and time-consuming, and is greatly affected by the operation level of the analyst
[0014] However, with the application of Baosteel's desulfurization process in power plants and sintering, it is very important to accurately and quickly control the desulfurization process. At the same time, the quality control of desulfurization gypsum is also directly related to its sales and directly affects the promotion of desulfurization process.
The change of calcium sulfate content directly reflects the adequacy of desulfurization and the quality of desulfurized gypsum, but the existing analysis technology cannot quickly and accurately determine the key factor of calcium sulfate in desulfurized gypsum
[0015] Therefore known calcium sulfate analytical method exists above-mentioned inconvenience and problem

Method used

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  • Method for measuring calcium sulfate in desulfuration gypsum
  • Method for measuring calcium sulfate in desulfuration gypsum
  • Method for measuring calcium sulfate in desulfuration gypsum

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with embodiment.

[0033] The concrete operation of calcium sulfate determination method in desulfurization gypsum of the present invention is as follows:

[0034] 1. Sample pretreatment

[0035] Centrifugal separation—take a certain amount of lime slurry sample and mix it well, put it in a centrifuge tube, and centrifuge it at a speed of 3,500 rpm for 5 minutes, so that the slurry is clearly separated. Remove the clarified liquid, and rinse the solid matter with pure water into a 100ml magnetic evaporating dish. This step can be omitted for solid gypsum samples.

[0036] Drying and sieving—put the magnetic evaporator in an oven at 105°C to dry overnight, take it out and cool it, and use an agate mortar to fully grind the dried lime slurry until it is powdery and mix it evenly. The final lime slurry powder is sieved with a 0.125 mm sieve, and the filtered slurry powder is collected and dried in an o...

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Abstract

The invention discloses a method for measuring calcium sulfate in desulfuration gypsum, which is characterized by comprising the following steps of: 1, preparing a lime slurry sample; 2, measuring the total calcium content and the total sulfur content of the sample by using an ICP method; 3, measuring the calcium sulfite content of the sample by using a volumetric method; and 4, obtaining the content of calcium sulfate, namely subtracting the calcium sulfite content measured in the third step from the total sulfur content measured in the second step to obtain the content of the calcium sulfate. The method for measuring the calcium sulfate in the desulfuration gypsum has the advantages of simple operation, short analysis time, high analysis precision and capability of meeting field processrequirements.

Description

technical field [0001] The invention relates to the field of environmental analysis and monitoring, in particular to a method for determining calcium sulfate in desulfurized gypsum. Background technique [0002] Steel companies are SO 2 Large emitters, with the country's increasing emphasis on environmental protection, in order to reduce air pollution, the country has increased the SO 2 The control efforts of iron and steel enterprises have been carried out one after another. At present, Baosteel's desulfurization technology mainly adopts wet limestone gypsum method based on gas jet swirl flushing wet flue gas desulfurization technology ① , this technology is currently the most mature, stable, and widely used desulfurization technology, and more than 90% of foreign flue gas desulfurization devices use this technology. [0003] The limestone-gypsum wet flue gas desulfurization process mainly uses cheap and easy-to-obtain limestone or lime as the desulfurization absorbent. ...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
Inventor 蒋文捷贡朝晖
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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