YB/T 386-2020硅质隔热耐火砖/Silicon heat insulating firebrick
硅质隔热耐火砖
1范围
本标准规定了硅质隔热耐火砖的术语和定义、牌号、形状和尺寸、技术要求、试验方法、质量评定程序、包装、标志、运输、储存和质量证明书
本标准适用于硅质隔热耐火砖。
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 2992.1耐火砖形状尺寸 第1部分:通用砖
GB/T 2998定形隔热耐火制品 体积密度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 加热永久线亦化试验方法
GB/T 6901硅质耐火材料化学分析方法
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耐火制品尺寸、外观及断面的检查方法
GB/T 16546定形耐火制品包装、标志、运输、储存和质量证明书的一般规定
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 耐火材料 荷重软化温度试验方法(非示差 升温法)
YB/T 4130 耐火材料 导热系数试验方法(水流量平板法)
3术语和定义
GB/T 10325界定的术语和定义适用于本文件。
4牌号、形状和尺寸
4.1硅质隔热耐火砖按体积密度分为:GGR-1.00、GGR-1.10、GGR-1.20三个牌号,其中G,G,R分别为“硅”“隔”“热”的汉语拼音首字母,后面的数字为硅质隔热耐火砖的体积密度。
4.2砖质隔热耐火砖的形状尺寸按GB/T 2992.1进行,亦可按需方提供的图纸要求进行。
5技术要求
5.1硅质隔热耐火砖的性能指标应符合表1的规定。
5.2硅质隔热耐火砖的尺寸允许偏差及外观应符合表2的规定。
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表1硅质隔热耐火砖的性能指标 |
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项 目 |
指 标 |
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GGR-1.00 |
GGR-1.10 |
GGR-1.20 |
||||
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w(SiO2)/% |
μ0 |
≥ |
91.0 |
92.0 |
92.5 |
|
|
体积密度/(g/cm3) |
μ0 |
≤ |
1.00 |
1.10 |
1.20 |
|
|
σ |
0.20 |
|||||
|
常温耐压强度/MPa |
μ0 |
≥ |
3.0 |
5.0 |
5.5 |
|
|
σ |
1.0 |
|||||
|
Xmin |
2.5 |
4.5 |
5.0 |
|||
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0.1MPa荷重软化开始温度 |
μ0 |
≥ |
1400 |
1450 |
1520 |
|
|
加热永久线变化/% |
Xmin~Xmax |
1450℃x2h -0.1~0.5 |
1550℃x2h -0.1~0.5 |
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导热系数/W·(m·K)–1(平均温度350℃±10℃) |
μ0 |
≤ |
0.40 |
0.45 |
0.60 |
|
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表2硅质隔热耐火砖的尺寸允许偏差及外观要求 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≤150 |
±2.0 |
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尺寸151~300 |
±3.0 |
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尺寸>300 |
±4 |
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扭曲 |
尺寸<250 |
≤ |
1.0 |
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251~400 |
2.0 |
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尺寸>400 |
3.0 |
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缺角长度(a+b+c) |
50 |
||
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缺棱长度(e+f+g) |
80 |
||
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熔洞直径 |
8 |
||
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裂纹长度 |
宽度≤0.25 |
– |
不限制 |
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宽度0.26~0.50 |
≤ |
70 |
|
|
宽度>0.50 |
– |
不准有 |
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裂纹跨棱时只允许跨过一条棱,跨棱裂纹不合并计算。 |
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5.3砖的断面层裂:宽度≤0.5mm的层裂长度不限制;宽度0.5~1.0mm的层裂长度≤30mm;宽度>1mm的层裂不准有。
5.4砖内部不准有黑心。
5.5其他特殊要求由供需双方协商。
6试验方法
6.1试样制备按GB/T 7321进行。
6.2化学成分的测定按GB/T 6901或GB/T 21114进行。
6.3体积密度的测定按GB/T 2998进行。
6.4常温耐压强度的测定按GB/T 5072进行。
6.5加热永久线变化的测定按GB/T 5988进行。
6.6导热系数的测定按YB/T 4130进行。
6.7荷重软化开始温度的测定按YB/T 370进行。
6.8 尺寸、外观及断面的检查按GB/T 10326进行。
7质量评定程序
7.1组批
产品应按同一牌号编批,每批不超过50t。
7.2抽样及合格判定规则
产品的抽样、验收按GB/T 10325进行。化学成分、体积度、常温耐压强度和加热永久线变化为验收检验项目。
7.3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、储存和质量证明书
8.1产品的包装、标志、运输、储存按GB/T 16546进行。或根据用户要求进行包装。
8.2产品发出时应附有质量证明书,质量证明书应载明供方名称或厂标、需方名称、发货日期、合同号执行标准编号、产品名称、牌号、砖号、批号及相应的理化检验结果。
Silica insulated firebrick
1 Range
This standard specifies the terms and definitions, grades, shapes and dimensions, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of siliceous refractory bricks
This standard applies to siliceous heat-insulating firebricks.
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 and true porosity of GB/T 2998 shaped heat-insulating refractory products
GB/T 5072 refractories – normal temperature compressive strength test method
GB/T 5988 refractory heating permanent line normalization test method
GB/T 6901 Method for chemical analysis of silica refractories
GB/T 7321 shaped refractory product sample preparation method
GB/T 10325 shaped refractory products acceptance sampling inspection rules
GB/T 10326 refractory products size, appearance and section inspection method
GB/T 16546 General requirements for packaging, marking, transport, storage and quality certificates of shaped 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 refractories (non-differential warming method)
Test method for thermal conductivity of YB/T 4130 Refractories (Water flow plate method)
3 Terms and definitions
The terms and definitions defined in GB/T 10325 apply to this document.
4 Grades, shapes and dimensions
4.1 Silicone-insulated firebricks are divided into three grades by volume density :GGR-1.00, GGR-1.10 and GGR-1.20, where G,G and R are the initial letters of Chinese pinyin of “silicon”, “insulation” and “heat” respectively, and the numbers behind are the volume density of silicone-insulated firebricks.
4.2 The shape and size of the brick heat-insulating firebrick shall be made according to GB/T 2992.1, or according to the drawing requirements provided by the demander.
5 Technical Requirements
5.1 The performance indicators of silicon heat-insulating firebricks shall comply with the provisions of Table 1.
5.2 The size permissible deviation and appearance of the siliceous heat-insulating firebrick shall comply with the provisions of Table 2.
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Table 1 Performance index of siliceous heat-insulating firebrick |
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Item |
Index |
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GGR-1.00 |
GGR-1.10 |
GGR-1.20 |
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|
w(SiO2)/% |
μ0 |
≥ |
91.0 |
92.0 |
92.5 |
|
|
Bulk density/(g/cm3) |
μ0 |
≤ |
1.00 |
1.10 |
1.20 |
|
|
σ |
0.20 |
|||||
|
Compressive strength at room temperature/MPa |
μ0 |
≥ |
3.0 |
5.0 |
5.5 |
|
|
σ |
1.0 |
|||||
|
Xmin |
2.5 |
4.5 |
5.0 |
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0.1MPaLoad softening starting temperature |
μ0 |
≥ |
1400 |
1450 |
1520 |
|
|
Heating permanent line change/% |
Xmin~Xmax |
1450℃x2h -0.1~0.5 |
1550℃x2h -0.1~0.5 |
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Thermal conductivity/W·(m·K)–1(Mean temperature350℃±10℃) |
μ0 |
≤ |
0.40 |
0.45 |
0.60 |
|
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Table 2 The unit of allowable size deviation and appearance requirement for siliceous heat-insulating firebrick is mm |
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Item |
Index |
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Allowable deviation of dimension |
Dimension≤150 |
±2.0 |
|
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Dimension151~300 |
±3.0 |
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Dimension>300 |
±4 |
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Contort |
Dimension≤250 |
≤ |
1.0 |
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Dimension251~400 |
2.0 |
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Dimension>400 |
3.0 |
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Missing Angle length(a+b+c) |
50 |
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Missing edge length(e+f+g) |
80 |
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Hole diameter |
8 |
||
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Crack length |
Breadth≤0.25 |
– |
No limit |
|
Breadth0.26~0.50 |
≤ |
70 |
|
|
Breadth>0.50 |
– |
Be forbidden from |
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When a crack crosses an edge, only one edge is allowed, and the cross edge cracks are not combined. |
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5.3 The section crack of brick: the width ≤0.5mm of the crack length is not limited; The length of spalling with a width of 0.5~1.0mm is less than 30mm; Cracks with widths greater than 1mm are not allowed.
5.4 No black heart is allowed inside the brick.
5.5 Other special requirements shall be negotiated by both parties.
6 Test methods
6.1 Sample preparation was carried out according to GB/T 7321.
6.2 Chemical composition is determined in GB/T 6901 or GB/T 21114.
6.3 The bulk density was measured according to GB/T 2998.
6.4 The compressive strength at room temperature shall be measured according to GB/T 5072.
6.5 The determination of permanent line change of heating was performed according to GB/T 5988.
6.6 Thermal conductivity was measured according to YB/T 4130.
6.7 The load softening starting temperature was determined according to YB/T 370.
6.8 The size, appearance and section shall be checked according to GB/T 10326.
7 Quality assessment procedures
7.1 Batch
Products should be batch according to the same brand, each batch does not exceed 50t.
7.2 Rules for sampling and conformity determination
The sampling and acceptance of products shall be carried out according to GB/T 10325. Chemical composition, volume, normal temperature compressive strength and heating permanent line change are the acceptance test items.
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 Packing, marking, transportation, storage and quality certificate
8.1 The packaging, marking, transportation and storage of the product shall be carried out in accordance with GB/T 16546. Or packaging according to user requirements.
8.2 The product shall be issued with a quality certificate, which shall indicate the name of the supplier or factory standard, the name of the demander, the date of delivery, the contract number, the execution standard number, the product name, the brand number, the brick number, the lot number and the corresponding physical and chemical inspection results.
