YB/T 4168-2019 焦炉用黏土砖及半硅砖
焦炉用黏土砖及半硅砖
1范围
本标准规定了焦炉用黏土砖及半硅砖的分类及形状尺寸、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。
本标准适用于焦炉用黏土砖、半硅砖,也可用于炭素炉、煤气发生炉和直立炉内衬用砖等。
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 2992.1 耐火砖形状尺寸 第1部分:通用砖。
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 7321定形耐火制品试样制备方法。
GB/T 7322耐火材料 耐火度试验方法。
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、外观及断面的检查方法。
GB/T 16546定形耐火制品包装、标志、运输和储存。
GB/T 21114 耐火材料 X线荧光光谱化学分析 铸璃片法。
YB/T 370 耐火材料 荷重软化温度试验方法(非示差-升温法)。
3 分类及形状尺寸
3.1 焦炉用黏土砖及半硅砖按用途和理化指标分为:JNZ-35、BGZ-5两类。其中JN ZBG 为“焦”“黏”“砖”“半”“硅”的汉语拼音首字母,35和65分别表示Al2O3和SiO2)的质量百分含量。
3.2 焦炉用黏土砖及半硅砖的形状及尺寸可按GB/T 2992.1进行,也可按需方提供的图纸要求生产。
4 技术要求
4.1 焦炉用黏土砖及半硅砖的理化指标应符合表 1的规定。
|
表1焦炉用黏土砖及半硅砖的理化指标 |
||||
|
项目 |
规定值 |
|||
|
JNZ-35 |
BGZ-65 |
|||
|
w(SiO2)/% |
μ0 |
≥ |
– |
65 |
|
σ |
– |
1.5 |
||
|
w(Al2O3)/% |
μ0 |
≥35 |
<30 |
|
|
σ |
1.5 |
1.5 |
||
|
w(Fe2O3)/% |
μ0 |
≤ |
2.5 |
– |
|
σ |
0.5 |
– |
||
|
显气孔率/% |
μ0 |
≤ |
24 |
24 |
|
σ |
2 |
2 |
||
|
常温耐压强度 |
μ0 |
≥ |
30 |
30 |
|
σ |
10 |
10 |
||
|
0.2MPa 荷重软化开始温度(T0.6)/℃ |
μ0 |
≥ |
1350 |
1350 |
|
σ |
15 |
15 |
||
|
耐火度/℃ |
μ0 |
≥ |
1680 |
– |
|
σ |
15 |
|||
|
加热永久线变化(1350℃x2h)/% |
-0.3~0 |
-0.2~0 |
||
|
注:格子砖只检测耐火度，不考虑荷重软化温度。 |
||||
4.2 焦炉用黏土砖及半硅砖的尺寸允许偏差和外观应符合表2、表3的规定。
|
表2焦炉用黏土砖及半硅砖尺寸允许偏差及外观 单位为毫米 |
||||
|
项目 |
规定值 |
|||
|
尺寸允许偏差 |
尺寸≤150 |
-2~+1 |
||
|
尺寸151~300 |
±2 |
|||
|
尺寸>300 |
尺寸±1%，最大±4 |
|||
|
扭曲 |
长度≤300 |
≤1.0 |
||
|
长度>300 |
≤2.0 |
|||
|
缺角长度(a+b+c) |
≥ |
40 |
||
|
缺棱长度(e+f+g) |
60 |
|||
|
缺棱，缺角个数 |
3 |
|||
|
裂纹长度 |
宽度≤0.10 |
不限制 |
||
|
宽度 0.11~0.25 |
≥ |
70 |
||
|
宽度0.26~0.50 |
40 |
|||
|
宽度>0.50 |
不准有 |
|||
|
相对边差 厚度 |
≥ |
1 |
||
|
表3焦炉用黏土砖及半硅砖的熔洞和铁斑点 |
|||||
|
砖面 |
熔 洞 |
铁斑点 |
|||
|
直径 mm |
深度 mm |
每100cm砖面上允许的最多熔洞数/个 |
直径 mm |
每100c㎡砖面上允许的最多个数/个 |
|
|
工作面 |
>3~≤5 >5~≤8 |
≤3 |
3 1 |
>5~≤10 |
3 |
|
其他面 |
>5~≤7 >7~≤10 |
3 1 |
>5~≤15 |
3 |
|
|
按每个砖面实际面积进行折算。 |
|||||
5试验方法
5.1检验制样按GB/T 7321进行。
5.2化学成分的测定按GB/T 6900或GB/T 21114进行。
5.3显气孔率的测定按GB/T 2997进行。
5.4常温耐压强度的测定按GB/T 5072进行。
5.5加热永久线变化的测定按GB/T 5988进行。
5.6荷重软化温度的测定按YB/T 370进行。
5.7尺寸、外观的检查按GB/T 10326进行。
5.8耐火度的测定按GB/T 7322进行。
6质量评定程序
6.1 编批
产品按用途、生产工艺进行编批,每批数量不超过500t。
6.2抽样及合格判定规则
6.2.1产品出厂检验项目包括表1中的全部项目。
6.2.2产品的抽样和验收按GB/T 10325进行。化学成分、显气孔率、常温耐压强度、荷重软化温度(不包括格子砖)或耐火度为验收检验项目。
6.3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。
7包装、标志、运输、储存和质量证明书
7.1产品的包装、标志、运输和储存按 GB/T 16546 进行,有合同约定的按合同进行。
7.2产品出厂时,应附有供方质量监督部门签发的质量证明书,载明供方名称、需方名称、产品名称和牌号、合同号、生产日期及理化指标等内容。
Clay and semi-silicon bricks for coke ovens
1 Range
This standard specifies the classification, shape and size, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of clay and semi-silicon bricks used in coke ovens.
This standard is applicable to clay bricks and semi-silicon bricks for coke ovens, and can also be used for lining bricks for carbon furnaces, gas generators and vertical furnaces.
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.
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 5988 refractory heating permanent line change test method.
GB/T 6900 aluminum-silicon refractory chemical analysis method.
GB/T 7321 shaped refractory product sample preparation method.
GB/T 7322 refractoriness test 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 21114 refractories X-ray fluorescence spectrochemical analysis cast glass sheet method.
Test method for softening temperature of YB/T 370 refractories under load (non-differential – rising temperature method).
3 Classification and shape size
3.1 Clay bricks and semi-silicon bricks for coke ovens are divided into JNZ-35 and BGZ-5 categories according to their use and physical and chemical indexes. JN ZBG is the initial letter of “Jiao”, “sticky”, “brick”, “half” and “silicon” in Chinese pinyin,35 and 65 respectively represent the mass percentage content of Al2O3 and SiO2).
3.2 The shape and size of clay bricks and semi-silicon bricks for coke oven can be made according to GB/T 2992.1, or according to the drawing requirements provided by the customer.
4 Technical Requirements
4.1 The physical and chemical indexes of clay bricks and semi-silicon bricks used in coke ovens shall comply with the provisions of Table 1.
|
Table 1 Physical and chemical indexes of clay bricks and semi-silicon bricks used in coke ovens |
||||
|
Item |
Rated value |
|||
|
JNZ-35 |
BGZ-65 |
|||
|
w(SiO2)/% |
μ0 |
≥ |
– |
65 |
|
σ |
– |
1.5 |
||
|
w(Al2O3)/% |
μ0 |
≥35 |
<30 |
|
|
σ |
1.5 |
1.5 |
||
|
w(Fe2O3)/% |
μ0 |
≤ |
2.5 |
– |
|
σ |
0.5 |
– |
||
|
Apparent porosity/% |
μ0 |
≤ |
24 |
24 |
|
σ |
2 |
2 |
||
|
Compressive strength at room temperature/MPa |
μ0 |
≥ |
30 |
30 |
|
σ |
10 |
10 |
||
|
0.2MPa load softening starting temperature(T0.6)/℃ |
μ0 |
≥ |
1350 |
1350 |
|
σ |
15 |
15 |
||
|
Refractoriness/℃ |
μ0 |
≥ |
1680 |
– |
|
σ |
15 |
|||
|
Heating permanent line change (1350℃x2h)/% |
-0.3~0 |
-0.2~0 |
||
|
Note: Check brick only test refractories, do not consider the load softening temperature. |
||||
4.2 The size permissible deviation and appearance of clay bricks and semi-silicon bricks used in coke ovens shall comply with the provisions of Table 2 and Table 3.
|
Table 2 Allowable size deviation and appearance of clay bricks and semi-silicon bricks used in coke ovens unit: mm |
||||
|
Item |
Rated value |
|||
|
Allowable deviation of dimension |
Dimension≤150 |
-2~+1 |
||
|
Dimension151~300 |
±2 |
|||
|
Dimension>300 |
Dimension±1%，Max±4 |
|||
|
Distortion |
Length≤300 |
≤1.0 |
||
|
Length300 |
≤2.0 |
|||
|
Missing Angle length(a+b+c) |
≥ |
40 |
||
|
Missing edge length(e+f+g) |
60 |
|||
|
Missing edges, missing angles |
3 |
|||
|
Crack length |
Breadth≤0.10 |
No limit |
||
|
Breadth 0.11~0.25 |
≥ |
70 |
||
|
Breadth0.26~0.50 |
40 |
|||
|
Breadth>0.50 |
Be forbidden from |
|||
|
Relative edge difference thickness |
≥ |
1 |
||
|
Table 3 Melting holes and iron spots of clay and semi-silicon bricks used in coke ovens |
|||||
|
Face of brick |
Molten cavern |
Iron speck |
|||
|
Diameter mm |
Profundity mm |
Maximum number of holes allowed per 100cm brick surface |
Diameter mm |
Maximum number of bricks per 100c㎡ |
|
|
Working face |
>3~≤5 >5~≤8 |
≤3 |
3 1 |
>5~≤10 |
3 |
|
Other side |
>5~≤7 >7~≤10 |
3 1 |
>5~≤15 |
3 |
|
|
Convert according to the actual area of each brick surface. |
|||||
5 Test methods
5.1 Test sample preparation shall be carried out according to GB/T 7321.
5.2 Chemical composition is determined in GB/T 6900 or GB/T 21114.
5.3 The apparent porosity was measured according to GB/T 2997.
5.4 The compressive strength at room temperature shall be measured according to GB/T 5072.
5.5 The determination of the permanent line change of heating was performed according to GB/T 5988.
5.6 The load softening temperature was measured according to YB/T 370.
5.7 The size and appearance shall be checked according to GB/T 10326.
5.8 Refractories shall be measured according to GB/T 7322.
6 Quality assessment procedures
6.1 Batch Ordering
The products shall be batch according to the use and production process, and the quantity of each batch shall not exceed 500t.
6.2 Sampling and conformity determination rules
6.2.1 Factory inspection items include all items listed in Table 1.
6.2.2 Sampling and acceptance of products shall be carried out according to GB/T 10325. Chemical composition, apparent porosity, normal temperature compressive strength, load softening temperature (excluding lattice bricks) or fire resistance are the acceptance test items.
6.3 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.
7 Packing, marking, transportation, storage and quality certificate
7.1 The packaging, marking, transportation and storage of the products shall be carried out in accordance with GB/T 16546, and shall be carried out in accordance with the contract as stipulated in the contract.
7.2 The quality certificate issued by the quality supervision department of the supplier shall be attached when the product leaves the factory, indicating the name of the supplier, the name of the demander, the name and brand of the product, the contract number, the production date and the physical and chemical index.
