Test method of fire resistance of phosphorus gypsum and application

Abstract

The invention provides a test method of fire resistance of phosphorus gypsum. The method comprises the following steps: preparing the phosphorus gypsum into a gypsum plaster board; tearing off surface protective paper at one side of the gypsum plaster board, and burning one side with the surface protective paper of the gypsum plaster board by using flame; recording a time for the flame to penetrating the gypsum plaster board from one side with the surface protective paper to the side without the surface protective paper; and recording an outer flame temperature of the flame and the plate surface temperature of the side without the surface protective paper of the gypsum plaster board in the burning process, wherein the outer flame temperature is 930 plus or minus 30 DEG C. The invention also provides application of the test method of the fire resistance of the phosphorus gypsum in screening the phosphorus gypsum. The test method is used for screening the phosphorus gypsum capable of preparing the gypsum plaster board satisfying the following performance: the time for the flame to penetrate through the gypsum plaster board from one side with the surface protective paper to the side without the surface protective paper is greater than or equal to 40 min, and the plate surface temperature of the side without the surface protective paper of the gypsum plaster board in the burning process is less than or equal to 230 DEG C.

Description

technical field [0001] The invention relates to a method for testing the fire resistance of phosphogypsum and its application. Background technique [0002] my country has about 8.3% of the world's phosphate rock resources, ranking third in the world in terms of resource share, and the second largest in the world in terms of phosphate rock and phosphate fertilizer. It is also a major phosphorus supplier along with the United States, Russia, and Morocco. At the same time, my country's phosphate fertilizer consumption ranks first in the world, accounting for about 29.7% of the world's total consumption. Phosphogypsum is an industrial waste from the phosphoric acid or phosphate fertilizer industry and some synthetic detergent industries. At present, the annual discharge of phosphogypsum in the world exceeds 280 million tons, and the total annual discharge of phosphogypsum in my country is more than 50 million tons. The environmental protection and site pressure of its stacking...

AI Technical Summary

Problems solved by technology

The strength of fire-resistant gypsum board without adding glass fiber mainly comes from the upper and lower layers of protective paper. The protective paper will catch fire, so the method of adding counterweight is not suitable for testing its fire resistance

Moreover, there is currently no test method for the fire resistance of fire-resistant gypsum board without adding glass fibers

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