Detecting method of hydration process of gypsum slurry, and control method

Abstract

The invention provides a detecting method of the hydration process of gypsum slurry, and a control method. The detecting method comprises the steps: the temperature of the gypsum slurry is repeatedlymeasured at certain time intervals; according to the recorded time and the measured temperature, a hydration process curve of the temperature change of the gypsum slurry along with the time is drawn;and according to the hydration process curve, the initial setting time, the final setting time and the hydration completing time of the gypsum slurry are obtained. According to the detecting method, by adding a retarder or a coagulant into the gypsum slurry, the initial setting time, the final setting time and the hydration completing time of the gypsum slurry are controlled; through the detectingmethod, the hydration process of the gypsum slurry can be scientifically and stably detected and analyzed; the control method facilitates control over a production process; and the property and the product quality of the gypsum slurry are stabilized.

Description

technical field [0001] This application relates to but not limited to the field of building materials, in particular to but not limited to a detection method and control method for the hydration process of gypsum slurry. Background technique [0002] In the production of gypsum board, it is required to detect the setting time of gypsum slurry online, and adjust the amount of coagulation regulator according to the change of slurry setting time, so as to control the final setting time to match the production speed. [0003] The method of online detection of the setting time in the general production line is: use a small spatula to scoop up an appropriate amount of slurry and press the stopwatch to time, use a blade to cut the slurry, when the gap is not closed, it is the initial setting time, and use the thumb at the right time to measure the setting time by about 50 Newtons. Press the surface of the slurry with a firm force until no water marks appear on the surface of the sl...

AI Technical Summary

Problems solved by technology

However, the initial setting time detected by this method is not the initial setting time of the slurry in the strict sense, but the time when the slurry loses fluidity, which can only be used to guide production

Moreover, the strength of thumb pressing varies from person to person, which causes a large error in the detection of final setting time. How to eliminate such errors and achieve stable production control is crucial to stabilizing product quality

[0004] It is also possible to use the Vicat instrument to detect the initial setting time and final setting time of the slurry, but it is very troublesome to operate, and there will be certain errors in judging the initial setting time and final setting time of the slurry, and it has no guiding significance for production. Large, not suitable for online detection of initial setting time and final setting time of slurry

[0005] The current detection methods of slurry setting time all have disadvantages and unstable factors, and cannot comprehensively analyze the hydration process of slurry

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