YB/T 4381-2014 刚玉—莫来石砖/Corundum mullite bricks
刚玉-莫来石砖
1 范围
本标准规定了刚玉-莫来石砖的分类、技术要求、试验方法、质量评定程序、包装、标志、运输、储存及质量证明书。
本标准主要适用于高炉陶瓷杯、熔融气化炉、炭黑炉等工业窑炉用刚玉-莫来石砖。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅所注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 2997 致密定形耐火制品 体积密度、显气孔率和真气孔率试验方法
GB/T 5072耐火材料 常温耐压强度试验方法
GB/T 5988耐火材料 加热永久线变化试验方法
GB/T 6900铝硅系耐火材料化学分析方法
GB/T 7320耐火材料 热膨胀试验方法
GB/T 7321定形耐火制品试样制备方法
GB/T 10325定形耐火制品验收抽样检验规则
GB/T 10326定形耐火制品尺寸、外观及断面的检査方法
GB/T 16546定形耐火制品包装、标志、运输和储存
GB/T 20511耐火制品分型规则
GB/T 21114 耐火材料 X射线荧光光谱化学分析 熔铸玻璃片法
YB/T 370 耐火制品荷重软化温度试验方法(非示差-升温法)
YB/T 376.1 耐火制品抗热震性试验方法(水急冷法)
3 术语和定义
GB/T 10325 界定的以及下列术语和定义适用于本文件。
3.1
刚玉-莫来石砖 Corundum-mullite bricks
刚玉-莫来石砖是指以刚玉、莫来石为主要原料,主晶相为莫来石和刚玉的定形耐火制品。
4 分类、形状和尺寸
4.1 砖按主要成分 Al0,含量分为 GMZ-75、GMZ-80、GMZ-85 和 GMZ-88 四个牌号。牌号中 G、M、Z分别为刚、莫、砖的汉语拼音首字母。数字部分表示氧化铝含量的质量百分数。
4.2砖的形状尺寸应符合 GB/T 20511 的规定或用户规定要求。
5技术要求
5.1砖的理化指标应符合表1的规定。
5.2砖的尺寸允许偏差及外观应符合表2的规定。
5.3预组装产品的尺寸允许偏差应符号表3的规定。
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表1 刚玉-莫来石砖的理化指标 |
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项目 |
指 标 |
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|
GMZ-88 |
GMZ-85 |
GMZ-80 |
GMZ-75 |
||
|
w(Al2O3)/% |
μ0 |
≥88 |
≥85 |
≥80 |
≥75 |
|
σ |
0.8 |
0.8 |
0.8 |
1.0 |
|
|
w(Fe2O3)/% |
μ0 |
0.8 |
≤1.0 |
≤1.0 |
≤1.2 |
|
σ |
0.2 |
0.2 |
0.2 |
0.2 |
|
|
显气孔率/% |
μ0 |
15(17) |
≤16(18) |
≤18(20) |
18(20) |
|
σ |
1.3 |
1.3 |
1.3 |
1.3 |
|
|
体积密度/(g/cm3) |
μ0 |
≥3.00 |
≥2.85 |
≥2.75 |
≥2.60 |
|
σ |
0.20 |
0.20 |
0.20 |
0.20 |
|
|
常温耐压强度/MPa |
μ0 |
≥120 |
≥100 |
≥100 |
≥80 |
|
σ |
15 |
15 |
15 |
15 |
|
|
Xmin |
100 |
80 |
80 |
60 |
|
|
荷重软化温度/℃(0.2MPa, T0.6) |
μ0 |
≥1700 |
≥1680 |
≥1650 |
|
|
σ |
25 |
25 |
25 |
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|
加热永久线变化/%(1500℃X2h) |
Xmin ~Xmax |
-0.1~0.1 |
-0.2~0.2 |
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|
热震稳定性/次(1100℃,水冷) |
– |
≥10 |
≥10 |
提供数据 |
|
|
热膨胀率/%(1000℃) |
– |
提供数据 |
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注1:显气孔率括号内指标为超特型砖指标。 注2:如有特殊要求由供需双方协商确定。 |
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表2刚玉-莫来石砖的尺寸允许偏差及外观 单位为毫米 |
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|
项目 |
指标 |
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|
尺寸允许偏差 |
尺寸≤100 |
±1.0 |
|||
|
尺寸101~250 |
±2.0 |
||||
|
尺寸>250 |
±2.5 |
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|
扭曲 |
≤ |
1.0 |
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|
缺角(a+b+c) 缺棱(e+f+g) |
工作面 |
40 |
|||
|
非工作面 |
60 |
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熔洞直径 |
工作面 |
3.0 |
|||
|
非工作面 |
5.0 |
||||
|
裂纹长度 |
宽度≤0.10 |
不限制 |
|||
|
宽度0.11~0.25 |
工作面 |
50 |
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|
非工作面 |
70 |
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|
宽度0.26~0.5 |
工作面 |
30 |
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|
非工作面 |
50 |
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|
宽度>0.5 |
不准有 |
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表3预组装产品尺寸允许偏差 单位为毫米 |
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|
项目 |
垂直缝 |
水平缝 |
环缝 |
孔径直径 |
内外径半径偏差 |
宽度 |
标高 |
|
炉底 |
≤1.0 |
≤1.0 |
– |
– |
– |
– |
±1.0 |
|
炉壁 |
≤1.5 |
≤1.5 |
≤2.0 |
– |
±10 |
– |
±2.0 |
|
风口、渣口 |
≤2.0 |
≤2.0 |
≤2.0 |
±3.0 |
±10 |
– |
±2.0 |
|
铁口 |
≤2.0 |
≤2.0 |
≤2.0 |
±3.0 |
– |
±2.0 |
±2.0 |
|
注:不允许有重缝(上下砖错缝<10mm即视为重缝)。 |
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6试验方法
6.1砖的检验制样按 GB/T 7321规定执行。
6.2化学分析按 GB/T 6900或 GB/T 21114规定进行。
6.3显气孔率、体积密度的检验按 GB/T 2997规定进行,
6.4常温耐压强度的检验按 GB/T 5072规定进行。
6.5荷重软化温度的检验按 YB/T 370规定进行。
6.6加热永久线变化检验按 GB/T 5988规定进行,
6.7抗热震性的检验按 YB/T 376.1规定进行。
6.8热膨胀检验按 GB/T 7320规定进行。
6.9砖的尺寸、外观检査按 GB/T 10326规定进行。
7 质量评定程序
7.1产品验收
预组装产品对预组合后产品进行整体检查验收,其他窑炉用产品对产品尺寸、外观进行检查验收。
7.2组批
按牌号进行编批,每批不大于 150t。
7.3抽样及合格判定规则
产品的抽样及验收按 GB/T 10325 的规定进行。化学成分、显气孔率、常温耐压强度、加热永久线变化为产品考核验收项目。加热永久线变化判定形式为:单值在最大值及最小值范围内,判为合格,否则为不台格。
7.4合格评定形式
合格评定可采用供货方声明、使用方认定或第三方认证的形式进行。
8包装、标志、运输、储存及质量证明书
8.1砖的包装、标志、运输、储存按 GB/T 16546 规定进行。
Corundum mullite bricks
1 Range
This standard specifies the classification, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of corundum and mullite bricks.
This standard is mainly applicable to corundum mullite bricks used in furnace ceramic cups, fused gasifiers, carbon black furnaces and other industrial kilns.
2 Normative reference documents
The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendment orders) applies to this document.
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 5988 refractory heating permanent line change test method
GB/T 6900 aluminum-silicon refractory chemical analysis method
GB/T 7320 refractory thermal expansion test 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 21114 refractories by X-ray fluorescence spectrochemical analysis of fused cast glass sheets
Test method for Load softening temperature of YB/T 370 refractory products (non-differential warming method)
YB/T 376.1 Test method for thermal shock Resistance of Refractory products (water quench method)
3 Terms and definitions
The terms and definitions defined in GB/T 10325 and the following terms and definitions apply to this document.
3.1Corundum- Mullite bricks
Corundum – mullite brick refers to corundum, mullite as the main raw material, the main crystalline phase of mullite and corundum shaped refractory products.
4 Classification, shape and size
4.1 According to the main component Al0, the brick content is divided into four grades: GMZ-75, GMZ-80, GMZ-85 and GMZ-88. In the brand, G, M and Z are the initial letters of Chinese pinyin for Gang, Mo and Brick respectively. The number part indicates the mass percentage of alumina content.
4.2 The shape and size of the brick shall comply with the provisions of GB/T 20511 or the requirements specified by the user.
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.
5.3 The permissible deviation of dimensions of pre-assembled products shall be specified in Symbol Table 3.
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Table 1 Physical and chemical indexes of corundum – mullite bricks |
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Item |
Index |
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|
GMZ-88 |
GMZ-85 |
GMZ-80 |
GMZ-75 |
||
|
w(Al2O3)/% |
μ0 |
≥88 |
≥85 |
≥80 |
≥75 |
|
σ |
0.8 |
0.8 |
0.8 |
1.0 |
|
|
w(Fe2O3)/% |
μ0 |
0.8 |
≤1.0 |
≤1.0 |
≤1.2 |
|
σ |
0.2 |
0.2 |
0.2 |
0.2 |
|
|
Apparent porosity/% |
μ0 |
15(17) |
≤16(18) |
≤18(20) |
18(20) |
|
σ |
1.3 |
1.3 |
1.3 |
1.3 |
|
|
Bulk density/(g/cm3) |
μ0 |
≥3.00 |
≥2.85 |
≥2.75 |
≥2.60 |
|
σ |
0.20 |
0.20 |
0.20 |
0.20 |
|
|
Compressive strength at room temperature/MPa |
μ0 |
≥120 |
≥100 |
≥100 |
≥80 |
|
σ |
15 |
15 |
15 |
15 |
|
|
Xmin |
100 |
80 |
80 |
60 |
|
|
Softening temperature under load/℃(0.2MPa, T0.6) |
μ0 |
≥1700 |
≥1680 |
≥1650 |
|
|
σ |
25 |
25 |
25 |
||
|
Heating permanent line change/%(1500℃X2h) |
Xmin ~Xmax |
-0.1~0.1 |
-0.2~0.2 |
||
|
Thermal shock stability/time(1100℃,water-cooling) |
– |
≥10 |
≥10 |
Provide data |
|
|
Thermal expansion rate/%(1000℃) |
– |
Provide data |
|||
|
Note 1: The index in the apparent porosity bracket is the index of super type brick. Note 2: Any special requirements shall be determined by both parties through negotiation. |
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Table 2 The unit of allowable size deviation and appearance of corundum – mullite brick is mm |
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Item |
Index |
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|
Allowable deviation of dimension |
Dimension≤100 |
±1.0 |
|||
|
Dimension101~250 |
±2.0 |
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|
Dimension>250 |
±2.5 |
||||
|
Contort |
≤ |
1.0 |
|||
|
Missing corner(a+b+c) Wane(e+f+g) |
Working face |
40 |
|||
|
Non-working face |
60 |
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|
Hole diameter |
Working face |
3.0 |
|||
|
Non-working face |
5.0 |
||||
|
Crack length |
Breadth≤0.10 |
No limit |
|||
|
Breadth0.11~0.25 |
Working face |
50 |
|||
|
Non-working face |
70 |
||||
|
Working face |
Working face |
30 |
|||
|
Non-working face |
50 |
||||
|
Breadth>0.5 |
Be forbidden from |
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Table 3 Allowable size deviations of preassembled products Unit in millimeter |
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|
Item |
Vertical joint |
Horizontal joint |
Ring seam |
Aperture diameter |
Deviation of inner and outer diameter radius |
Breadth |
Elevation |
|
Furnace bottom |
≤1.0 |
≤1.0 |
– |
– |
– |
– |
±1.0 |
|
Furnace wall |
≤1.5 |
≤1.5 |
≤2.0 |
– |
±10 |
– |
±2.0 |
|
Tuyere, slag mouth |
≤2.0 |
≤2.0 |
≤2.0 |
±3.0 |
±10 |
– |
±2.0 |
|
Iron notch |
≤2.0 |
≤2.0 |
≤2.0 |
±3.0 |
– |
±2.0 |
±2.0 |
|
Note: No reseam is allowed (the joint between the upper and lower bricks <10mm is considered as reseam). |
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6 Test methods
6.1 Brick inspection sample preparation shall be carried out according to GB/T 7321.
6.2 Chemical analysis shall be performed in accordance with GB/T 6900 or GB/T 21114.
6.3 The inspection of apparent porosity and bulk density shall be carried out according to GB/T 2997.
6.4 The test of compressive strength at room temperature shall be carried out according to the provisions of GB/T 5072.
6.5 The test of the load softening temperature shall be carried out in accordance with the provisions of YB/T 370.
6.6 Heating permanent line change inspection shall be carried out according to GB/T 5988.
6.7 Thermal shock resistance shall be tested according to YB/T 376.1.
6.8 The thermal expansion test shall be conducted according to GB/T 7320.
6.9 The size and appearance inspection of bricks shall be carried out according to GB/T 10326.
7 Quality assessment procedures
7.1 Product Acceptance
The pre-assembled products shall be inspected and accepted as a whole after the pre-assembled products, and the size and appearance of the products shall be inspected and accepted for other kiln products.
7.2 Batch Group
Batch according to the brand, each batch is not more than 150t.
7.3 Sampling and qualification rules
Sampling and acceptance of products shall be carried out according to GB/T 10325. Chemical composition, apparent porosity, normal temperature compressive strength, heating permanent line changes are the items of product inspection and acceptance. The determination form of heating permanent line change is: if the single value is within the range of maximum and minimum values, it is judged as qualified, otherwise it is not grid.
7.4 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 Packing, marking, transportation, storage and quality certificate
8.1 The packaging, marking, transportation and storage of bricks shall be carried out in accordance with the provisions of GB/T 16546.
