Lime moisture content testing device under nitrogen protection condition and use method
A technology of nitrogen protection and test equipment, applied to measuring equipment, by removing certain components and weighing materials, etc., can solve problems such as chemical reaction errors, achieve small usage, easy and safe operation, and save costs Effect
Pending Publication Date: 2022-06-21
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Problems solved by technology
[0005] The purpose of the present invention is to provide a lime water content test device and using method under nitrogen protection conditions, which overcomes the error problem caused by the chemical reaction between lime samples and carbon dioxide in the air in the drying process existing in the prior art, The invention provides a simple and effective device capable of providing nitrogen protection conditions
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[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0035] The invention relates to a test device for lime moisture content under nitrogen protection and a use method. refer to Figure 1 to Figure 7 The schematic diagram of the test device for the moisture content of lime under nitrogen protection conditions is shown, including a ground glass bottle 3 with a suction head 5 below, a bottle cap 1 and a sample holder 6 . The ground glass bottle 3 and the bottle cap 1 are made of high pressure glass, and the sample holder 6 is made of stainless steel. A valve 4 made of polytetrafluoroethylene is inserted in the middle of the air extraction he...
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The invention relates to a device for testing the moisture content of lime under a nitrogen protection condition and a use method, solves the problem of errors caused by chemical reaction between a lime sample and carbon dioxide in air in a drying process in the prior art, and provides a simple, convenient and effective device capable of providing the nitrogen protection condition. The device comprises a ground glass bottle, the lower part of the ground glass bottle is provided with an air exhaust head, a valve made of polytetrafluoroethylene is inserted in the middle of the air exhaust head, and the valve is fixed with the air exhaust head through a nut and a gasket at the lower end. A bottle cap is arranged at a bottle opening of the ground glass bottle, four fixing holes are formed in the edge of the bottle opening of the ground glass bottle, and the ground glass bottle and the four fixing holes of the bottle cap are fixed through bolts and nuts. A sample rack is arranged in the ground glass bottle and is divided into an upper layer and a lower layer, and each layer is in a square plate type.
Description
Technical field: [0001] The invention belongs to the technical field of railway engineering survey and test equipment, and relates to a test device for lime moisture content under nitrogen protection, which is suitable for geochemical tests and a method for using the same. Background technique: [0002] During the dosage test of cement or lime, the moisture content of lime needs to be measured. During the measurement, it was found that the mass of the sample increased after drying, and the test result was a negative value. The reason for this phenomenon may be that under high temperature conditions, lime reacts with carbon dioxide in the air to produce calcium carbonate, which increases the quality of the sample, resulting in inaccurate test results. In order to improve the accuracy of the test results, nitrogen protection should be carried out during the drying process to provide a carbon dioxide-free environment. Avoid errors caused by chemical reactions between lime sam...
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IPC IPC(8): G01N5/04
CPCG01N5/045
Inventor 李海龙王生仁张文忠赵志强王永安王韫楠郑复鹏梁宗旭杨文薛再兰肖蕊丽柴毓帆
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP