YB/T 4577-2016 Low-permeability high-alumina brick
2023-10-26
Anti-penetration high alumina brick
1 Scope
This standard specifies the terms and definitions, grades and dimensions, technical requirements, test methods, quality evaluation procedures, packaging, marking, transportation, storage and quality certificates of anti-penetration high alumina bricks.
This standard is mainly used for the lining of aluminum melting furnaces and heat preservation furnaces in the aluminum industry.
2 Normative references
The following documents are indispensable for the application of this document. Referenced documents with dates are applicable only to the versions cited. , Referenced documents without dates are applicable to their latest editions. , Including all amendments. ( Applicable to this document. )适用于本文件。
GB/T 2992.1 Dimensions of refractory bricks Part 1 Part : General bricks
GB/T 2997 Test methods for bulk density, apparent porosity and true porosity of dense shaped refractory products.
GB/T 5072 Refractory materials Test method for compressive strength at room temperature.
GB/T 6900 Chemical analysis methods for aluminum silicate refractory materials.
GB/T 7321 Preparation methods for shaped refractory product samples.
GB/T 10325 Rules for acceptance sampling inspection of shaped refractory products.
GB/T 10326 Inspection methods for dimensions, appearance and section of shaped refractory products.
GB/T 16546 Packaging, marking, transportation and storage of shaped refractory products.
GB/T 20511 Classification rules for refractory products.
GB/T 20975.4 Chemical analysis methods for aluminum and aluminum alloys Part 4 Part Determination of iron content.
GB/T 20975.5 Chemical analysis methods for aluminum and aluminum alloys Part 5 Part : Determination of silicon content.
GB/T 21114 Refractory materials X X-ray fluorescence spectrometry Casting glass片法.
3 Terms and definitions
3.1
Anti-penetration high alumina brick
It is a high alumina brick with high alumina bauxite as the main raw material, made by adding additives and firing, and has the ability to resist aluminum liquid penetration.
4 Grades, shapes and sizes
4.1 Bricks are divided into two grades, KST-85 and KST-70, according to the different content of alumina. K and ST are the capitalized first letters of the pinyin of "anti" and "penetration", respectively, and 85 and 70 represent the mass percentage of alumina content.
4.2 The shape and size of the bricks shall conform to the provisions of GB/T 2992.1 and GB/T 20511, and can also be produced according to the drawings provided by the demander.
5 Technical requirements
5.1 The physicochemical indicators of the bricks shall conform to the provisions of Table 1.
5.2 The dimensional tolerances and appearance of the bricks shall conform to the provisions of Table 2.
Table 1 Physicochemical indicators of anti-penetration high alumina bricks | |||
Item | Index | ||
KST-85 | KST-70 | ||
w(Al 2 O 3)/% | μ 0 ≥ | 85 | 70 |
σ | 1.5 | ||
w(SiO 2)/% | μ 0 ≤ | 8 | 25 |
σ | 1.0 | 1.5 | |
w(Fe 2 O 3)/% | μ 0 ≤ | 1.50 | 2.00 |
σ | 0.3 | ||
Apparent porosity/% | μ 0 ≤ | 15 | 18 |
σ | 1.5 | ||
Bulk density/g·cm -3 | μ 0 ≥ | 2.90 | 2.60 |
σ | 0.03 | ||
Compressive strength at room temperature/MPa | μ 0 ≥ | 110 | 100 |
σ | 15 | ||
X min ≥ | 100 | 90 | |
ΔSi，ΔFe(7075 aluminum alloy at 815℃x72h after) a /% | Si≤0.50 Fe≤0.10 | Si≤0.80 Fe≤0.40 | |
The detection method is shown in the appendix. If there are newly formulated standards, the detection method shall be based on the newly formulated standards. | |||
Table 2 Dimensional tolerances and appearance of anti-penetration high alumina bricks Unit: mm | |||
Item | Index | ||
Dimensional tolerance | ≤100 | ±1.5 | |
100~250 | ±2.0 | ||
>250 | ±1.0% (maximum ±3.0%) | ||
Warping | Length ≤350 | ≤ | 1.0 |
Length >350 | 2.0 | ||
Thickness relative side difference | 1.0 | ||
Notch length (a+b+c) | 50 | ||
Notch length (e+f+g) | 80 | ||
Crack length | Width ≤0.25 | Unlimited | |
Width 0.26~0.50 | 60 | ||
Width >0.5 | Not allowed | ||
Note 1: Total number of notches and chipped corners: ≤3 per brick | |||
6 Test methods
6.1 Brick sampling shall be carried out according to GB/T 7321.
6.2 Determination of chemical composition shall be carried out according to GB/T 6900 or GB/T 21114.
6.3 Determination of apparent porosity and bulk density shall be carried out according to GB/T 2997.
6.4 Determination of normal temperature compressive strength shall be carried out according to GB/T 5072.
6.5 Inspection of appearance dimensions and section shall be carried out according to GB/T 10326.
6.6 The detection method of Si and Fe elements in 7075 aluminum alloy shall be carried out according to Appendix A.
6.7 The detection of chemical composition of 7075 aluminum alloy shall be carried out according to GB/T 20975.4 and GB/T 20976.5
7 Quality assessment procedures
7.1 Batching
Bricks are batched according to the same grade, and each batch is no more than 150t.
7.2 Sampling and acceptance criteria
Sampling and acceptance of bricks shall be carried out according to GB/T 10325. Chemical composition, apparent porosity, normal temperature compressive strength and ΔSi, ΔFe (7075 aluminum alloy after 815℃x72h) are the physical and chemical test acceptance items for bricks.
7.3 Qualification assessment form
Qualification assessment can be carried out in the form of supplier's declaration, user's determination or third-party certification.
8 Packaging, marking, transportation, storage and quality certificate
8.1 Packaging, marking, transportation and storage of bricks shall be carried out according to GB/T 16546.
8.2 When bricks are shipped, a quality certificate signed by the supplier's quality department shall be attached, stating the supplier's name or factory mark, customer's name, production date, shelf life, delivery date, contract number, standard number, product name, grade, brick number, batch number and corresponding physical and chemical test results, etc.
High permeability aluminum brick
1 Range
This standard specifies the terms and definitions, grades and shapes, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of high alumina bricks.
This standard is mainly used for aluminum industry aluminum melting furnace, insulation furnace lining.
2 Normative reference documents
The following documents are essential for the application of this document. For dated references, the date-only version applies to this document. For undated references, the latest version (including all amendment orders) applies to this document.
GB/T 2992.1 Shape and dimensions of refractory bricks – Part 1: general purpose bricks
Test method for bulk density, apparent porosity and true porosity of GB/T 2997 compact shaped refractory products.
GB/T 5072 refractories – normal temperature compressive strength test method.
GB/T 6900 aluminum-silicon refractory chemical analysis method.
GB/T 7321 shaped refractory product sample preparation method.
GB/T 10325 shaped refractory products acceptance sampling inspection rules.
GB/T 10326 shaped refractory products size, appearance and section inspection method.
GB/T 16546 shaped refractory products packaging, marking, transportation and storage.
GB/T 20511 classification rules for refractory products.
GB/T 20975.4 Methods for chemical analysis of aluminium and aluminium alloys – Part 4 Determination of iron content.
GB/T 20975.5 – Methods for chemical analysis of aluminium and aluminium alloys – Part 5: Determination of silicon content.
GB/T 21114 refractories by X-ray photospectrochemical analysis of fused cast glass sheets.
3 Terms and definitions
3.1
Anti-penetration high alumina brick
The high aluminum brick is made of high aluminum rock as the main raw material, by adding additives, and by firing treatment, which is resistant to aluminum liquid penetration.
4 Grades, shapes and dimensions
4.1 Bricks are divided into two grades KST-85 and KST-70 according to the different content of aluminum oxide, K and ST are respectively the first letter of resistance and penetration Chinese pinyin uppercase, 85 and 70 represent the mass percentage of aluminum oxide content.
4.2 The shape and size of the bricks shall comply with the provisions of GB/T 2992.1 and GB/T 20511, and can also be produced according to the drawings provided by the demander.
5 Technical Requirements
5.1 The physical and chemical indexes of bricks shall comply with the provisions of Table 1
5.2 The permissible size deviation and appearance of the brick shall comply with the provisions of Table 2.
Table 1. Physical and chemical indexes of high permeability aluminum brick | |||
Item | Index | ||
KST-85 | KST-70 | ||
w(Al 2 O 3)/% | μ 0 ≥ | 85 | 70 |
σ | 1.5 | ||
w(SiO 2)/% | μ 0 ≤ | 8 | 25 |
σ | 1.0 | 1.5 | |
w(Fe 2 O 3)/% | μ 0 ≤ | 1.50 | 2.00 |
σ | 0.3 | ||
Apparent porosity/% | μ 0 ≤ | 15 | 18 |
σ | 1.5 | ||
Bulk density/g·cm -3 | μ 0 ≥ | 2.90 | 2.60 |
σ | 0.03 | ||
Compressive strength at room temperature/MPa | μ 0 ≥ | 110 | 100 |
σ | 15 | ||
X min ≥ | 100 | 90 | |
ΔSi，ΔFe(7075 aluminum alloy after 815℃x72h) a /% | Si≤0.50 Fe≤0.10 | Si≤0.80 Fe≤0.40 | |
The test method is shown in the appendix. If there is a newly formulated standard, the test method shall be subject to the newly formulated standard. | |||
Table 2 The size permissible deviation and appearance of the impermeable high-alumina brick are measured in millimeters | |||
Item | Index | ||
Allowable deviation of dimension | ≤100 | ±1.5 | |
100~250 | ±2.0 | ||
>250 | ±1.0%(Maximum ±3.0) | ||
Distortion | Length≤350 | ≤ | 1.0 |
Length>350 | 2.0 | ||
Thickness relative to edge difference | 1.0 | ||
Missing Angle length(a+b+c) | 50 | ||
Missing edge length(e+f+g) | 80 | ||
Crack length | Breadth≤0.25 | No limit | |
Breadth0.26~0.50 | 60 | ||
Breadth>0.5 | Be forbidden from | ||
Note 1: The number of missing edges and corners: the total amount of each brick is ≤3 Note 2: Only one edge is allowed when the crack crosses the edge, and the cross edge crack is combined. | |||
6 Test methods
6.1 Brick sample preparation is carried out according to GB/T 7321.
6.2 Chemical composition shall be determined according to GB/T 6900 or GB/T 21114.
6.3 The apparent porosity and bulk density were measured according to GB/T 2997.
6.4 The compressive strength at room temperature shall be measured according to GB/T 5072.
6.5 The inspection of the appearance size and section shall be carried out according to GB/T 10326.
6.6 The detection method of Si and Fe elements in 7075 aluminum alloy is carried out according to Appendix A.
6.7 The chemical composition of 7075 aluminum alloy is tested according to GB/T 20975.4 and GB/T 20976.5
7 Quality assessment procedures
7.1 Batch
Bricks shall be batched according to the same grade, and each batch shall not be larger than 150t.
7.2 Rules for sampling and conformity determination
Brick sampling and acceptance according to GB/T 10325, chemical composition, apparent porosity, normal temperature compressive strength and ΔSi,ΔFe(7075 aluminum alloy after 815℃x72h) are the physical and chemical inspection and acceptance items of bricks.
7.3 Form of conformity assessment
The conformity assessment can be made in the form of the supplier’s declaration, the user’s certification or the third party’s certification.
8 Packaging, marking transport, storage and quality certificate
8.1 Bricks are packed, marked, transported and stored in GB/T 16546.
8.2 When the bricks are issued, the quality certificate issued by the quality department of the supplier shall be attached, indicating the name of the supplier or factory standard, the name of the demander, production date, shelf life, delivery date, contract number, standard number, product name, brand number, brick number, lot number and corresponding physical and chemical inspection results.
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