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Test method and application of phosphogypsum fire resistance

A test method and fire resistance technology, which is applied in the field of fire resistance test of phosphogypsum, can solve problems such as unsuitable fire resistance, achieve high accuracy, scientific fire resistance, and simple operation

Active Publication Date: 2020-01-14
BEIJING NEW BUILDING MATERIALS PLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Test method and application of phosphogypsum fire resistance
  • Test method and application of phosphogypsum fire resistance
  • Test method and application of phosphogypsum fire resistance

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Embodiment 1-7

[0028] Use experimental method of the present invention to detect following 1 # ~6 # Widely used samples containing phosphogypsum and 7 # Fire resistance of desulfurized gypsum samples: 1 # —Hubei Yidu phosphogypsum; 2 # —Hubei Wuxue phosphogypsum; 3 # —Shandong Dezhou Phosphogypsum; 4 # —Mix the new phosphogypsum material in Chengdu, Sichuan and the old phosphogypsum material stored for one year at a ratio of 1:1; 5 # —The desulfurization gypsum of Zhuozhou Branch of Beixin Group Building Materials Co., Ltd. is mixed with Yunnan Kunming phosphogypsum at a ratio of 1:1; 6 # —Desulfurization gypsum and 4 # The sample phosphogypsum is mixed according to 1:1, 7 # — Taicang BNBM Co., Ltd. desulfurized gypsum (as a control).

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/22
CPCG01N25/22
Inventor 周梦文白风华冉秀云杨青贾严严
Owner BEIJING NEW BUILDING MATERIALS PLC
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