Some standard content:
Ics71.120,25.220.50
Registration No. 1395-1998
Chemical Industry Standard of the People's Republic of China
HG/T3728--1998
ASTMc285-88
Determintaion method of graininess of glass --lined enamel frit1998—03—17 Issued
1998-10-01 Implementation
The Ministry of Chemical Industry of the People's Republic of China issuedHG/T3128—1998
The coarseness and fineness of glass glaze-the coarseness and fineness are directly related to the whole process of the glass equipment firing process. It directly affects the firing process and many properties of the glass layer, such as firing temperature, firing range, suspension, powder spraying thickness, fusibility, opacity, micro cracks, and even chemical stability. In order to stabilize the production operation of glass products, it is necessary to define and specify the coarseness and fineness of the glaze used according to the specific process, glaze and finished product requirements. For this purpose, this standard is specially formulated.
Since no similar standard has been issued in the current international standard (ISO), this standard selectively adopts ASTMc285-88 "Standard Test Method for Screening of Wet and Dry Grinded Ceramic Glazes" issued by the American Society for Testing and Materials. Overall, this standard is not equivalent to this standard, but within the range of coarseness and fineness applicable to glass glazes, the test method has reached the equivalent of this standard, that is, the test accuracy and test results of this standard can be compared with the test results of ASTMc285-88. The formulation of this standard adds a test method for the coarseness and fineness of wet and dry glazes for glass to the glass industry, which will greatly facilitate the technical exchange of glaze performance, the study of the relationship between glazes and processes, and the promotion of the circulation of glaze fixed-point production and supply. The equipment, instruments and measuring tools used in this standard are all products for circulation and use as specified by the current domestic standards. The concepts of numerical values and data processing involved in this standard are all implemented in accordance with the current national standards. Appendix A of this standard is the appendix of the standard. This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the National Standardization Technical Committee for Glass Equipment. The drafting unit of this standard is the Chemical Machinery Research Institute of the Ministry of Chemical Industry. The main drafter of this standard is Liu Liangyue.
WW.bzSOso.cOm1Scope
Chemical Industry Standards of the People's Republic of China
Test method of graininess of otglass enamel
Detcrmination method of graininess otglass-lined enamel frit
IG/T 3128-1998
eQy ASTM c285-88
This standard specifies the method of using 40 national standard sieves (nominal aperture 0.45mm wire mesh sieve) and 200 mesh standard sieves (nominal aperture 0.076mm wire mesh sieve) to determine the particle fineness of the bottom and surface axes of wet or dry ground sugar glass and the fineness of the machine. This standard is applicable to the determination of the fineness of various bottom and surface glazes used in the glass industry. The safety issues of glazes, operations and instruments involved in this standard are not described in the standard, but safety issues are objective existences that cannot be ignored, so operators must be reminded to pay attention to the safety issues involved, such as the electrical safety of instruments and equipment. 2 References to brown standards
The provisions contained in the following subtitles constitute the provisions of this standard by 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 version of the following standards. GB6001~6003-85 Specifications and dimensions of test sieves and screens ASTM EII
3 Definition
Specifications of metal sieves for testing
Coarseness: This standard specifies the coarseness of glass glaze as the percentage of powder particles with a pore size of 0.075mm±0.001mm contained in the dry powder of the shaft material with a pore size of less than 0.45mm. 4 Test method
4.1 Equipment and apparatus
4.1.1 Tianhu 1 unit with a load capacity of ≥500 and an accuracy of ≤0.1g.4.1.240 daily sample separation 1 sieve, nominal aperture 0.45mm (in accordance with GR6001~6003). 4.1.3 200-day sample sieves, nominal aperture 0.075mm±0.001mm (in accordance with GB6001~6003). Note: The aperture specifications of the 40-day and 200-day sample sieves are the same as those of the 40-day and 200-day sieves in the ASTME11 standard series, and are equivalent to the specifications of the national standard sieves and the internationally used Thai weak standard series. .4 One oven, suitable for drying glaze and placing sample sieves, the temperature can be controlled at 120 ± 2 ° C, 4.1.5 One mechanical vibrator (or mechanical vibrating screen), which can be installed with a mechanical group motion device for the sample sieve. 4.2 Test sample
4.2.1 Wet arm glass bottom and surface box
First, sieve the test sample slurry with a 40-mesh sieve, and then use the drying method to determine the liquid content of the glaze slurry to be tested (see Appendix A, the standard appendix), and weigh according to the liquid content. Two axle pulp samples containing about 100.0g of solid powder. Approved by the Ministry of Chemical Industry of the People's Republic of China on March 17, 1998, and paid on October 1, 1998
WWW.bzSoso.com4.2.2 Dry-grinded pond glass glaze
HG/T31281998
Select a large sample that can represent the glaze to be tested, first sieve the large sample with a 40-mesh sieve, and then weigh two 100.0g glaze samples from it. 4.3 Test method for wet-grinded glaze
4.3.1 Mixed sieving: Put the weighed sample into a pre-weighed 200-mesh sieve, connect the water source with a rubber hose to rinse the sample through the sieve with slowly flowing water until the sieved water becomes clean and free of turbidity. This process usually takes about 2 minutes. Note that you should be careful when rinsing to prevent splashing or overflowing and causing sample loss. Provide the sieve with the residue until the residue can be easily moved like a dry powder when the sieve is shaken, and then sieve and weigh as described in 4.3.2 or 4.3.3. Two samples are carried out separately. 4.3.2 Hand sieve: Grasp the sieve with a sea plate and a lid, with the sieve at an angle of about 20° to the horizontal, and move the sieve back and forth on an inclined plane at a frequency of about 150 times per minute, touching the palm of the other hand at the highest point of each stroke. After every 25 strokes, rotate the sieve in the same direction for 1/6 of a circle, and continue the operation until less than 0.05g is continuously sieved out within one minute. It usually takes 5 to 7 minutes to complete this process. Weigh the sieve residue of the sample on the sieve to an accuracy of 0.1. 4.3.3 Mechanical vibrating screen (or mechanical spreader): If a mechanical vibrating screen is used, its test results must be consistent with the accuracy of the hand sieve. Therefore, it must first be compared with the hand sieve test in 4.3.2, and the hand sieve results must be used as the standard to calibrate the operating time of the same sample in the mechanical vibrating screen to obtain the same accuracy result. Then, the test sample to be tested is screened and weighed using this calibrated vibration operating time. 4.4 Test method for dry-ground glaze
Put a 100.0g sample weighed accurately to 0.1g (note that the damp sample must be dried) into a 200-mesh sieve, and then sieve and weigh as described in 4.3.2 or 4.3.3, for two samples separately. 4.5 Calculation and results
Technical practice beauty body large decoration teaching
4.5.1 Calculate the coarseness of the two samples according to the following formula! Coarseness - weight × 100%
Sample weight
4.5.2 The test result is the average of the two test data. If the difference between the two data is not less than 0.5g, the test is invalid and the test is repeated until it meets this requirement. 4.6 Precision and AccuracyWww.bzxZ.net
4.6.1 Precision: Tangci Industrial Puzhui confirmed that when one operator performs the same operation test twice in the same laboratory using the same set of equipment and instruments, the precision can be ≤0.5 (the difference between the two data is <0.5g). It is usually used in production monitoring tests to confirm that the test accuracy of this method can meet this requirement. When performing two identical measurements, the test accuracy is affected by the operator's skills, screen blockage, screen wear and the different mechanical vibrating screens used, as well as different samples, multiple sample changes, and particle condensation caused by chemical reactions between different samples. If the above precision requirements are still not met after multiple repetitions, a new screen needs to be replaced. The normal use cycle of a screen can reach 500 times, and it needs to be calibrated every 50 times. 4.6.2 Accuracy: Since the true value of the screening test cannot be determined by an acceptable standard, no accurate statement can be made on the accuracy of this test method.
5 Test Report
The test report shall include the following contents:
a) report name and number;
b) sample name, code and category (wet-ground or dry-ground base glaze and top glaze);
b) sample source (commissioned sample or supervised sampling);
d) test category (production monitoring or product inspection);
e) number of tests;
f) test results;
8) test completion time;
h) tester.
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HG/T 3128-1998
Appendix A
(Appendix of the standard)
Determination of liquid content in glaze slurry by drying method
Method A
Take 170~190g of the glaze slurry to be tested, and place it in a covered glass container with a known weight (accurate to 0.18). Prevent the liquid in the glaze slurry (usually water) from evaporating, weigh the apparent weight on a 0.1g balance, and then place it in a constant temperature box at 120±2℃ to dry to constant weight. A2 calculation
Glaze slurry liquid disk before the shaft slurry weight is the same as the final dry powder weight × 100% before baking glaze slurry straight
People's Republic of China
Chemical industry standard
Glass shaft coarseness test method
HG/T3128—1998
Editor China Chemical Equipment Corporation
Postal code 106011
Printing Beijing University of Chemical Technology Printing Factory
All rights reserved. Reprinting prohibited
1/16 Printing sheet 0.5 Number of words 9,000 words
Format 880×1230
First edition in September 1998 First printing in September 1998 Number of copies 1—200
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