This standard specifies the method summary, test instruments and equipment, test steps, test result calculation and error for the determination of moisture content of continuous casting mold slag at 110℃. This standard is applicable to the determination of moisture content of continuous casting mold slag at 110℃. YB/T 189-2001 Test method for determination of moisture content of continuous casting mold slag (110℃) YB/T189-2001 Standard download decompression password: www.bzxz.net

YB/T189—2001
Continuous casting mold slag physical test method consists of the following standards: YB/T185
YB/T186
YB/T187bZxz.net
YB/T188
YB/T189
Continuous casting mold slag viscosity test method;
Continuous casting mold slag melting temperature test method; continuous casting mold slag bulk density test method; continuous casting mold slag particle size distribution test method; Yan
Continuous casting mold slag moisture content (110C) determination test method This standard is proposed and managed by the Metallurgical Industry Information Standards Research Institute. The responsible drafting unit of this standard: Wuhan Iron and Steel Group Corporation. The participating drafting units of this standard: Chongqing University, Iron and Steel Research Institute, Taiyuan Iron and Steel Company Yichuan slag plant. The main drafters of this standard: Tian Qing, Chen Baoyun. 1 Scope
Ferrous Metallurgy Industry Standard of the People's Republic of China Moisture content of continuous casting mold powder (110℃)
Test method
Method of the test formoisture content (11oC) of continuous casting mold powder YB/T189—2001
This standard specifies the method summary, test instruments and equipment, test steps, test result calculation and error for the determination of moisture content of continuous casting mold powder at 110℃.
This standard is applicable to the determination of moisture content of continuous casting mold powder at 110℃. 2 Method summary
Weigh a certain mass of sample and place it in a drying oven, dry it to a constant weight at 110℃, and the mass fraction of the lost mass to the mass of the sample before drying is taken as the moisture content.
3 Reagents
3.1 Color-changing silica gel: industrial pure.
3.2 Anhydrous calcium chloride: chemically pure, granular, 3.3 Molecular sieve: industrial pure.
4 Instruments and equipment
4.1 The drying box is equipped with an automatic temperature control device, and the temperature can be controlled at 105℃～110℃; 4.2 The weighing bottle is 40mm in diameter and 25mm in height, and is equipped with a tightly sealed ground-mouth bottle; 4.3 The desiccator is filled with color-changing silica gel or granular anhydrous calcium chloride; 4.4 The sensitivity of the analytical balance is 0.0001g.
5 Sample
5.1 Any continuous casting protective slag can be directly used as a weighing sample. 5.2 Sample weight: 50g~100g, accurate to 0.01g. 5.3 Sampling should be done using a ground-mouth bottle or a multi-layer waterproof protective sample bag. 6 Test steps
6.1 Take out the weighing bottle that has been dried to a constant weight from the desiccator, quickly weigh 4g~5g of the sample and put it into the weighing bottle, and immediately cover the bottle cap.
6.2 Open the weighing bottle containing the sample and place it in a drying oven at 105℃～110℃ for 3h~4h. Take out the weighing bottle. Immediately cover it with the lid and place it in a desiccator to cool to room temperature and weigh it. Place the weighed sample in the drying oven for another hour and weigh it. If the difference between the two masses is within 0.3mg, it is considered to be completely dried. Otherwise, repeat the drying. Each time for 1h until the difference between the two consecutive masses is within 0.3mg, and the last mass is used for calculation.
Result calculation
The moisture content (%) of the sample is calculated according to formula (1):
Where: G—mass of the sample before drying, in g. G,—mass of the sample after drying, in g. 8
1×100
The difference between two test results shall not exceed the provisions of Table 1. Table 1
Mass fraction of moisture
9Test report
The test report shall include the following contents:
a) entrusting unit;
b) sample name;
c) sample date;
d) testing unit;
e) test results;
f) tester;
g) auditor.
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