GB/T 18301-2012 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 18301-2012 | English | 190 |
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Refractory products -- Determination of resistance to abrasion at ambient temperature
| Valid |
| GB/T 18301-2001 | English | 319 |
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Test method for abrasion resistance of refractory materials at room temperature
| Obsolete |
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GB/T 18301-2012: Refractory products -- Determination of resistance to abrasion at ambient temperature
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18301-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 81.080
Q 40
GB 18301-2012
Replacing GB/T 18301-2001
Refractory Products - Determination of
Resistance to Abrasion at Ambient Temperature
(ISO 16282:2007, Dense Shaped Refractory Products - Determination
of Resistance to Abrasion at Ambient Temperature, MOD)
ISSUED ON: NOVEMBER 05, 2012
IMPLEMENTED ON: MAY 01, 2013
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Principle ... 5
5 Equipment ... 5
6 Specimen ... 10
7 Test Procedures ... 10
8 Calculation of Results ... 11
9 Inspection of the Equipment ... 12
10 Test Report ... 12
Appendix A (Informative) Comparison of Clauses between this Standard and
ISO 16282:2007 ... 14
Appendix B (Informative) Technical Differences and their Causes between this
Standard and ISO 16282:2007 ... 15
Refractory Products - Determination of
Resistance to Abrasion at Ambient Temperature
1 Scope
This Standard specifies the terms and definitions, principles, equipment, specimens,
test procedures, result calculations, equipment inspections and test reports, etc. for
the resistance to abrasion test of refractories at ambient temperature.
This Standard is applicable to the determination of the resistance to abrasion of dense
refractories at ambient temperature under abrasion and erosion environments.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) is applicable to this document.
GB/T 2480 Conventional Abrasive - Silicon Carbide
GB/T 2997 Test Method for Bulk Density, Apparent Porosity and True Porosity of
Dense Shaped Refractory Products (GB/T 2997-2000, eqv ISO 5017:1998)
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 9258.1 Coated Abrasives - Grain Size Analysis - Part 1: Grain Size
Distribution Test
GB/T 9258.2 Coated Abrasives - Grain Size Analysis - Part 2: Determination of
Grain Size Distribution of Macro-Grits P12 to P220
ISO 565 Test Sieves – Metal Wire Cloth, Perforated Metal Plate and
Electroformed Sheet – Nominal Sizes of Openings
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
Ensure that there is a gap of 2mm between one end of the sand blasting pipe and the
outlet end of the compressed air nozzle; and the abrasion medium enters the sand
blasting pipe through this gap. This operation can be done by placing the glass tube
on a brass rod with a diameter of 4.5mm, 117mm from the top, and with a 7.9mm lug.
So that it allows the glass tube to be inserted into the steel tube and enter into the gun
barrel until the top of the brass rod touches the air nozzle, thereby ensuring a 2mm
gap between the glass tube port and the air nozzle.
A new glass tube must be replaced for each measurement.
5.2 Feeding system
It has the ability to supply 1000g of abrasion medium to the injection device within
(450±15) s. The auxiliary air shall be able to carry abrasion medium into the system. A
suitable feeding mechanism is shown in Figures 3 and 4, which consists of 3 funnels:
a) An upper (charging) funnel;
b) A middle (loading control) funnel with an orifice made of metal, glass or plastic
installed on it to provide the required feeding rate;
c) A lower (feeding) funnel.
5.3 Test chamber (see Figure 3)
It consists of a sealed chamber with a door. The specimen may be placed and taken
out through this door. The injection device is installed vertically on the top of the test
chamber, so that the abrasion medium is sprayed down onto the specimen through
(203 ± 1) mm from the top of the glass nozzle.
The test chamber shall be equipped with an exhaust pipe and a butterfly valve to adjust
the pressure in the chamber during the test. A dust bag of appropriate volume may be
installed at the tail of the exhaust pipe.
A pipe and shut-off valve shall be installed on the upper part of the chamber to connect
the pressure gauge.
5.4 Liquid pressure gauge
Range: 0Pa~400Pa (41mm water column); it is used to measure the pressure in the
test chamber during the test.
5.5 Vacuum gauge
Range: 0Pa~-0.1MPa (75mm mercury column); it is used to measure the pressure at
the inlet of the abrasion medium of the injection device.
5.6 Balance
By using a regulator and a barometer with a division value of 7kPa, supply clean and
dry air to the injection device under the specified pressure; and the regulator and
pressure gauge shall be installed as close to the injection device as possible.
6 Specimen
6.1 General
The amount of test samples and the number of samples for each specimen shall be
determined by the relevant parties through negotiation, and shall be indicated in the
test report.
6.2 Shaped refractories
In addition to the most abrasion-resistant materials, other materials shall cut the
specimen with a size of (100~114) mm × (100~114) mm × (25~65) mm from refractory
bricks or finished products. A square surface of each specimen shall be a flat original
brick surface with no marks on it (see NOTE 1 in Clause 7). The size of specimen for
the material with good abrasion resistance may be 100mm×100mm×25mm. The
specimen size shall be indicated in the test report.
6.3 Unshaped refractories
The specimen size mentioned above may be directly prepared by test materials. The
preparation process including forming, processing and roasting temperature may be
carried out in accordance with the relevant product technical requirements and
standard specified methods, or by the relevant parties through consultation. A square
surface of each specimen shall be the bottom surface of the mould (see NOTE 1 in
Clause 7). The preparation conditions of the specimen and the size of the specimen
shall be fully recorded in the test report.
7 Test Procedures
7.1 Before the test, dry the specimen to a constant weight at a temperature of (110 ±
5) °C.
7.2 Weigh the specimen, accurate to 0.1g. Measure the length, width, and height of
the specimen by a vernier caliper (5.7), and accurate to 0.5mm; then calculate the
volume of the specimen.
7.3 Align the test surface of the specimen vertically at the glass nozzle (see NOTE 2)
in the test chamber; and place it at a position (203 ± 1) mm away from the end of the
nozzle. For shaped refractory specimens, the original flat brick surface without marking
shall be used for the test. For unshaped refractory specimens, the test surface shall
Where:
ρ – volume density, in g/cm3;
m1 – mass of the specimen before test, in g;
m2 – mass of the specimen after test, in g;
m – loss mass of the specimen, in g.
8.3 The volume density and the amount of abrasion are accurate to 2 digits after the
decimal point; and are rounded off according to GB/T 8170.
9 Inspection of the Equipment
Use 10mm~12mm thick colourless transparent float plate glass as the calibration
sample; and the data deviation of the two repeated tests does not exceed 7% of the
average value. When standard samples are available, use standard samples to check
the accuracy of the equipment.
10 Test Report
The test report shall include the following contents:
a) Description of test materials, including manufacturer, model, batch number, etc.;
b) The implemented national standard, namely GB/T 18301-2012;
c) The name of the testing organization;
d) Specimen size;
e) The sample quantity and the number of specimens for each sample;
f) For unshaped specimens, including the conditions of specimen preparation,
treatment and baking;
g) If it is different from the content specified in Clause 7, all information on the
abrasion surface is required to be indicated;
h) If it is different from the content specified in Clause 7, the impact angle of the
specimen placement is required to be indicated;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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