title>JB/T 3648.1-1994 Test methods for refractory products for resistance furnaces Thermal shock stability of shaped insulating refractory products - JB/T 3648.1-1994 - Chinese standardNet - bzxz.net
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JB/T 3648.1-1994 Test methods for refractory products for resistance furnaces Thermal shock stability of shaped insulating refractory products
Basic Information
Standard ID:
JB/T 3648.1-1994
Standard Name: Test methods for refractory products for resistance furnaces Thermal shock stability of shaped insulating refractory products
drafter:Zhu Suyuan, Cao Wenxiu, Wang Jusen, Shao Xibin, Ying Shengcai
Drafting unit:Xi'an Electric Furnace Research Institute, Shanghai Electric Furnace Refractory Material Factory, Yixing Chuanbu Refractory Electric Porcelain Factory No. 2, Dongtai Refractory Equipment Factory
Focal point unit:Xi'an Electric Furnace Research Institute of the Ministry of Machinery Industry
Proposing unit:National Technical Committee for Standardization of Industrial Electric Heating Equipment
Publishing department:Ministry of Machinery Industry of the People's Republic of China
This standard specifies the test method for thermal shock stability of shaped thermal insulation refractory products for resistance furnaces. This standard applies to shaped thermal insulation refractory products for resistance furnaces. JB/T 3648.1-1994 Test method for refractory products for resistance furnaces Thermal shock stability of shaped thermal insulation refractory products JB/T3648.1-1994 Standard download decompression password: www.bzxz.net
Some standard content:
Mechanical Industry Standard of the People's Republic of China JB/T3648.1 1994-12-09 Jia Kui Ji 1995-06-01 Xiao Suo Ji Jia Xin Kui Lu Wa Yi Dao This standard specifies the test method for thermal shock stability of shaped thermal insulation refractory products for resistance furnaces. This standard is applicable to shaped thermal insulation refractory products for resistance furnaces. 2 Reference standards ZBN11002 Technical conditions for industrial thermocouples GB9056 GB10633 3 Terms Thermal loss stability Steel ruler Steel tape measure JB/T3648.1 JB3648.11984 The ability of refractory products to resist repeated changes in temperature from rapid heating to rapid cooling. The expression method of thermal loss stability is shown in Article 8.5. 4 Test principle Select standard bricks as the test sample. Put the sample in a furnace with natural atmosphere and heat it to the test temperature, keep it warm for a certain period of time, and then cool it in the air. Repeat the above process and record the number of times the sample withstands 20% of its loss. Test equipment and test instruments 5.1 The temperature of the electric furnace should be able to reach above 1000℃, and can return to 1000℃ within 10min after the sample is loaded. The temperature stability of the furnace during the insulation period should not exceed the range of ±1℃, and the temperature uniformity of the furnace should not exceed the standard of ±15℃. The size of the working area should be able to place no less than 3 samples for testing at the same time. 5.2 Thermocouple should comply with the provisions of ZBN11C02. 5.3 Electric constant temperature drying oven should be able to meet the requirements of drying the moisture of the sample. 5.4 The sensitivity of the pan balance should not be greater than 5B. bZxz.net 5.5 Steel tape measure or steel ruler should comply with the provisions of GB10633 or GB9056. 5.6 The manipulator or fixture should be able to lift the sample from the furnace and place it on the test cooling rack. Yingji 1994-12-09 Tumor 1995-06-01 Small Cable 5.7 Sample cooling rack JB/T3648.1 should be a steel rack with refractory bricks spaced 180m apart and parallel to each other, as shown in the following figure: Figure Test Cooling Rack 6 Samples 6.1 Shape, size and quantity of samples Select 3 straight standard bricks of 230mm×114mm×65mm with complete edges and corners and no cracks, of the same batch number. 6.2 Marking Use Cr,0 to make sequential marks on the 114mm×65mm surface of the sample. 7 Test Procedure 7.1 Place the unmoistened sample in an electric constant temperature drying oven, dry it at 110±5℃ for 2h, then take it out, cool it to air, and then weigh it on a rack. 7.2 Raise the temperature of the electric furnace to 1000℃ and keep it for 30 min, then put the sample into the furnace along the length direction. The distance between bricks should not be less than 30mm, and the 230mm×65mm surface of the sample should touch the bottom of the furnace. 7.3 A maximum of 6 test pieces are allowed to be tested at the same time, but the samples shall not be stacked. 7.4 After the sample is placed in the furnace, close the furnace door, quickly return the furnace humidity to 1000℃ within 10min, and keep it warm for 20min. During this period, the furnace temperature stability and furnace temperature uniformity shall comply with the provisions in Article 5.1. 7.5 Open the furnace door after the insulation is completed. Article 7.2 Sample placement direction, use a manipulator or fixture to take out the sample and place it on the sample cold printing rack, and weigh it after natural cooling in the air for 5 minutes. However, the air temperature should not be higher than 40C, and there should be no forced convection ventilation and large metal heat conductors. 7.6 During the rapid cooling of the sample, the furnace door should be closed to keep the furnace temperature within 1000 ± 10℃. 8 Test result expression method 8. 1 Before the weight loss of the sample reaches 20%, the sample undergoes a rapid heating and rapid lifting process. It is called a rapid heating and rapid lifting. 8.2 If the weight loss of the sample reaches 20% during the rapid cooling process, the process is called a valid one. 8.3 Damage caused by external force is not counted. 8.4 If the last loss exceeds 20%, this clause is invalid. 8.5 The test result is the average of the number of rapid heating and rapid cooling of 3 samples. 9 Test report The test report should include: a. Entrusting unit; b. Sample name, number and date of manufacture: 2 Sample density; Test results: Test unit, Test personnel, Test date. Additional notes: JB/T3648.1 This standard is proposed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard is under the jurisdiction of Xi'an Electric Furnace Research Institute of the Ministry of Machinery Industry. 1994 This standard was drafted by Xi'an Electric Furnace Research Institute, Shanghai Electric Furnace Refractory Material Factory, Yixing Chuanbu Refractory Electric Porcelain Factory No. 2, and Dongtai Refractory Equipment. The main drafters of this standard are Mi Qianyuan, Cao Wenxiu, Wang Jusen, Shao Xibin, and Ying Shengcai. 3 880b1230 19XX Nest XX Cabin 100044 Dai Section x/X Matrix XXX.XXX 19XX Nest XX Ridge Purchase XXX.XX Guest Pengxian Extreme Key Sticker Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.