This standard specifies the determination principle, instrumentation, sample preparation, test procedures and test results of electrode paste elongation. This standard applies to self-baking electrode paste for submerged arc furnaces. YB/T 5289-2001 Test method for elongation of electrode paste YB/T5289-2001 Standard download decompression password: www.bzxz.net

YB/T5289—2001
This standard is revised on the basis of the original YB/T5289-—1999 "Determination Method of Electrode Paste Elongation". Compared with the original standard, the following modifications and supplements are made:
Increased the allowable error of the sample length;
Modified the pressure range of the press;
Modified the dimension marking of the measuring instrument schematic diagram. From the date of implementation, this standard replaces YB/T'5289—1999 "Determination Method of Electrode Paste Elongation". This standard is proposed and managed by the Metallurgical Industry Information Standards Research Institute. The drafting unit of this standard: Jilin Carbon Group Co., Ltd. The main drafters of this standard: Tian Li, Sun Quan. This standard was first issued in 1990.
Ferrous Metallurgy Industry Standard of the People's Republic of China Test Method for Extensibility of Electrode Paste
The test method of extensibility of electrode pasteYB/T 5289-2001
Replaces YB/T5289—1999
This standard specifies the determination principle, instrumentation, sample preparation, test procedures and test results of the elongation of electrode paste. This standard applies to self-baking electrode paste for submerged arc furnaces. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1427—2000 Sampling method for carbon cable materials GB/T 8170—1987
3 Principle
Numerical rounding rules
The sample is kept at 200℃ for 1h, and the percentage of the relative length of the sample after heating is the elongation of the electrode paste. Instruments and equipment
4.1 Elongation tester
As shown in Figure 1.
Material: steel plate
Figure 1 Elongation tester
Approved by the State Economic and Trade Commission on July 9, 2001 420
Implementation on January 1, 2002
4.2 Sample molding mold
As shown in Figure 2.
Material: No. 45
4.3 The oven temperature is adjustable.
4.4 The accuracy of the tray balance is 0.5g.
4.5 Vernier caliper precision 0.02mm.
YB/T 5289—2001
Fixed ring
Intermediate ring
Figure 2 Sample forming mold
4.6 Press range 0～4000N, adjustable, precision ≤±1%. 4.7 Porcelain dish volume 200mL. bzxZ.net
5 Sample preparation
5.1 Take samples according to the provisions of GB/T1427. Under the premise of not destroying the original particle size composition as much as possible, crush the samples to less than 25mm, the quantity shall not be less than 1kg, and reduce them by quartering method, and take 200g for forming. 5.2 Weigh 65g of the sample, accurate to 0.1g, and place it together with the mold in an oven at 145℃±5℃, keep warm for 30min (stir every 10min), quickly take it out and put it into the molding mold, put it on the press to press it into a sample with a diameter of 25mm and a length of 79mm~82mm, and cool it with water. After taking it out of the mold, grind the two end faces flat to use as the sample for measuring elongation. 6 Test steps
6.1 Use a caliper to accurately measure the length of the molded sample, weigh the mass with a pan balance and record it. 6.2 Place the sample in the measuring slot of the measuring instrument (the upper end of the sample is 30mm away from the upper edge of the slot), and steadily move it into the oven that has been kept at a constant temperature of 200℃±5℃, and keep it warm for 1h.
6.3 Take out the measuring instrument, quickly use a caliper to measure the length of the sample and record it. 7 Test results
The elongation of the sample is calculated by the following formula:
YB/T5289—2001
1×100
The elongation of the sample, unit is (%)
where: △L—
the length of the sample before heating, unit is mm; Lz—the length of the sample after heating, unit is mm; the test result is the arithmetic mean of two parallel samples. The test result is rounded to one decimal place, and the numerical value is rounded according to the provisions of GB/T8170. 8 Test report
The test report includes the following contents:
a) Commissioning unit;
b) Sample name,
c) Sample result,
d) Sample personnel;
e) Sample date.
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