Method for testing performance of fire-resistant thermal insulation material

A technology of refractory heat preservation and testing methods, applied in the direction of material thermal development, etc., can solve the problems of high sample requirements, complicated testing process, poor repeatability, etc.

Active Publication Date: 2021-07-30
SINOMA INT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The purpose of the invention is to provide a performance testing method for refractory and thermal insulation materials, which solves the problems of high sample requirements, complicated test process, long test period and poor repeatability of existing test methods

Method used

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  • Method for testing performance of fire-resistant thermal insulation material
  • Method for testing performance of fire-resistant thermal insulation material
  • Method for testing performance of fire-resistant thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Cut the refractory insulation material 4 used in the cement plant into samples with a length and width of 170×170 mm, and dry them in a thermostat. Place the sample on the electric furnace. The size of the furnace mouth 2 is 150×150mm. There is no insulation partition on the electric furnace. The sample is surrounded by the thermal insulation material 3 with a thermal conductivity of 0.025w / (m·K) and the same height. The insulation material 3 is wrapped to the outer edge 1 of the electric furnace, and the center of the sample is used as a point to draw grid line points. The area of ​​the grid line is 40×40mm. The electric furnace is heated to 400°C, and the initial time interval is 1h. The temperature value on the grid line, and calculate the average temperature of the intersection point of the sample grid line as the average temperature of the sample surface. When the average temperature tends to be stable, continue to record every 10 minutes. When the average temperat...

Embodiment 2

[0029] Cut the refractory insulation material 4 used by the manufacturer with a length and width of 100×100 mm into samples, and dry them in a thermostat. The sample is placed on the electric furnace. The size of the furnace mouth 2 is 150×150mm. The electric furnace is equipped with a thermal insulation partition, and the thermal insulation partition is an alumina fiber board. The vertical and horizontal centerlines of the sample, insulation partition and furnace mouth coincide. The sample is surrounded by thermal insulation material 3 of the same height with a thermal conductivity of 0.03w / (m·K), and the thermal insulation material 3 is wrapped to the outer edge 1 of the electric furnace. Take the center of the sample as a point, draw grid line points, and the area of ​​the grid line is 25×25mm. Heat the electric furnace to 850°C, record the temperature value of the intersection point on the grid line of the sample surface at an initial time interval of 1h, and calculate th...

Embodiment 3

[0033] The Simo red refractory brick sample sent by the cement factory is placed on the electric furnace. The size of the furnace mouth 2 is 150×150mm. The electric furnace is equipped with a thermal insulation partition, and the thermal insulation partition is an alumina fiber board. The vertical and horizontal centerlines of refractory bricks, insulation partitions and furnace mouth coincide. The sample is surrounded by thermal insulation material 3 with a thermal conductivity of 0.025w / (m·K) at the same height, and the thermal insulation material 3 is wrapped to the outer edge 1 of the electric furnace. Take the center of the sample as a point, draw grid line points, and the area of ​​the grid line is 20×100mm. Heat the electric furnace to 1200°C, record the temperature value of the intersection point on the grid line of the sample surface at an initial time interval of 1h, and calculate the average temperature of the sample grid line as the average temperature of the sampl...

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Abstract

The invention discloses a method for testing the performance of a fire-resistant thermal insulation material, which comprises the following steps: cutting the fire-resistant thermal insulation material into a required sample, drying the sample in a constant temperature box, placing the sample on an electric furnace with an upper opening, arranging or not arranging a thermal insulation partition plate on the electric furnace, and wrapping the sample by a thermal insulation material with the same height, heating the electrothermal furnace to the required temperature, and recording the cold surface temperature of the sample at certain time intervals; and when the cold surface temperature is stable, continuously reading the cold surface temperature as the final material surface temperature, and judging the heat insulation property of the sample according to the final sample surface temperature. The method has no strict requirements on the size and thickness of a sample, and for small-size samples and refractory bricks with irregular shapes, the sample only needs to be placed on the partition plate, and the size of an opening of the partition plate is correspondingly adjusted. After the test is finished, the sample or the temperature can be quickly changed, the performance of the large-batch samples of different manufacturers can be quickly judged, the test result is accurate, the reproducibility is good, and the precision is high.

Description

technical field [0001] The invention relates to a material performance testing method, in particular to a performance testing method of a refractory and thermal insulation material. Background technique [0002] The surface heat dissipation loss of the firing system of a cement plant will cause energy loss. The use of scientific heat preservation and heat insulation measures can reduce heat consumption and effectively improve the heat utilization efficiency of cement production. At present, the thermal insulation material of the firing system of the cement plant is generally calcium silicate board, but the thermal conductivity of the calcium silicate board is high at high temperature, and the insulation layer is easy to pulverize at high temperature, resulting in shortened service life. The demand for high temperature insulation materials is increasing day by day. Various new heat insulation materials currently on the market mainly include: high-temperature fibers, micropor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 冯冬梅宋华庭刘仁越许刚卢仁红王宇
Owner SINOMA INT ENG
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