YB/T 4128-2014 热风炉陶瓷燃烧器用耐火砖/Refractory bricks for hot blast stove ceramic combustor
热风炉陶瓷燃烧器用耐火砖
1 范围
本标准规定了热风炉陶瓷燃烧器用耐火砖的分类、形状尺寸、技术要求、试验方法、质量评定程序、包装、标识、运输、储存及质量证明书。
本标准适用于钢铁、有色冶炼等行业热风炉陶瓷燃烧器用耐火砖，
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 5073耐火材料压蠕变试验方法
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 10325定形耐火制品验收抽样检验规则
GB/T10326 定形耐火制品尺寸、外观及断面的检查
GB/T 16546 定形耐火制品包装、标志、运输和储存
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)
YB/T 5012 高炉及热风炉用耐火砖形状尺寸
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
热风炉 hot blast stove
是指为高炉及其他热工设备提供热风的高温装备。
3.2
陶瓷燃烧器 ceramic combustor是指热风炉燃烧装置用耐火砖组合体，
4 分类及形状尺寸
4.1 砖按其主要原料及性能分为四个牌号,分别为 RTMJ-50、RTMJ-55、RTH-53 和 RTH-57,其中R、T、M、H 和〕分别是“热风炉”、“陶瓷燃烧器”、“莫来石”、“红柱石”和“堇青石”首个汉字的汉语拼音首字母,数字表示 Al2O3含量。
4.2 砖的形状尺寸应符合 GB/T 2992.1、YB/T 5012的规定,亦可按需方提供的图纸执行。
5 技术要求
5.1 砖的理化指标应符合表1的规定。
|
表1 砖的理化指标 |
|||||
|
项目 |
RTMJ-50 |
RTMJ-55 |
RTHJ-53 |
RTH-57 |
|
|
w(Al2O3)/% |
μ0≥ |
50 |
55 |
53 |
57 |
|
σ |
1.5 |
1.5 |
1.5 |
1.5 |
|
|
w(Fe2O3)/% |
μ0≤ |
2 |
1.5 |
1.2 |
1.2 |
|
σ |
0.2 |
0.2 |
0.2 |
0.2 |
|
|
w(MgO)/% |
μ0≤ |
3 |
3 |
2 |
– |
|
σ |
0.5 |
0.5 |
0.5 |
||
|
w(TiO2)/% |
μ0≤ |
– |
– |
0.6 |
0.6 |
|
σ |
– |
– |
0.1 |
0.1 |
|
|
w(Na2O+K2O)/% |
μ0≤ |
1.5 |
1 |
0.6 |
0.6 |
|
σ |
0.2 |
0.2 |
0.1 |
0.1 |
|
|
显气孔率/% |
μ0≤ |
25 |
23 |
22 |
22 |
|
σ |
1.5 |
1.5 |
1.5 |
1.5 |
|
|
体积密度/(g/cm3) |
μ0≥ |
2,20 |
2.3 |
2.3 |
2.4 |
|
σ |
0.05 |
0.05 |
0.05 |
0.05 |
|
|
常温耐压强度/MPa |
μ0≥ |
50 |
55 |
60 |
60 |
|
Xmin |
30 |
40 |
40 |
40 |
|
|
荷重软化温度/℃(0.2MPa,T0.6) |
μ0≥ |
1420 |
1480 |
1500 |
1550 |
|
σ |
13 |
13 |
13 |
13 |
|
|
蠕变率/%(0.2MPa,50h) |
μ0≤ |
1200℃ |
1250℃ |
1300℃ |
1400℃ |
|
σ |
0.1 |
0.1 |
0.1 |
0.1 |
|
|
加热水久线变化率/% |
1350℃x2h |
1400℃x2h |
1450℃x2h |
1500℃x2h |
|
|
Xmin~Xmax |
-0.2~+0.2 |
||||
|
抗热震性/次(1100℃，水冷) |
Xmin≥ |
70 |
100 |
100 |
50 |
|
注:特异形和手工成型制品由供需双方协商解决。 |
|||||
5.2 砖的尺寸允许偏差及外观应符合表2的规定。
|
表2砖的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 |
长度 |
≤350 |
±2 |
|
|
>350 |
±2.5 |
|||
|
宽度 |
±1 |
|||
|
厚度 |
±1 |
|||
|
厚度相对偏差 |
≤350 |
≤0.5 |
||
|
>350 |
≤1 |
|||
|
扭曲 |
≤1 |
|||
|
缺角长度(a+b+c) |
40 |
|||
|
缺棱长度(e+f+g) |
50 |
|||
|
熔洞直径 |
工作面 |
6 |
||
|
非工作面 |
8 |
|||
|
裂纹长度 |
宽度≤0.25 |
不限制 |
||
|
宽度 0.26~0.5 |
30 |
|||
|
宽度>0.5 |
不准有 |
|||
|
注1:砖的断面层裂按裂纹数值考核。 注3:特异形和手工成型制品由供需双方协商解决。 |
||||
5.3 砖的组合体预砌要求应符合表3的规定。
|
表3砖的组合体预砌要求 单位为毫米 |
||
|
检 测 项目 |
误差要求 |
|
|
工作层 |
非工作层 |
|
|
标高(每米) |
-5~0 |
|
|
半径 |
±5 |
|
|
错台 |
≤1 |
≤2 |
|
垂直度(每米) |
≤3 |
|
|
水平度(每米) |
≤5 |
|
|
竖缝 |
≤2 |
|
|
环缝 |
≤3 |
|
|
注1:组合体预砌后，生产厂家应编制详细的预图，并在每块砖上标示对应编号。 注2:对内燃式和外燃式热风炉陶瓷燃烧器由供需双方协商解决。 |
||
6 试验方法
6.1 砖的检验制样按 GB/T 7321 进行。
6.2 Al2O3,、Fe2O3,MgO、TiO2,、Na2O、K2O 的测定按 GB/T 6900 进行。
6.3 显气孔率的测定按 GB/T 2997 进行。
6.4常温耐压强度的测定按 GB/T 5072 进行。
6.5荷重软化温度的测定按 YB/T 370 进行。
6.6加热永久线变化率的测定按 GB/T 5988 进行。
6.7蠕变率的测定按 GB/T 5073 进行。
6.8抗热震性的测定按 YB/T 376.1 进行。
6.9 砖的尺寸、外观及断面的测定按 GB/T 10326 进行。
7 质量评定程序
7.1 组批
产品按同一牌号组批,一组热风炉燃烧器用砖为一批。
7.2 抽样和验收
砖的抽样、验收按 GB/T 10325 进行。化学成分中的氧化铝含量、抗热震性、常温耐压强度和荷重软化温度为验收检验项目。
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 砖采用托盘或根据用户要求进行包装;对组合体应依照预砌编号按顺序装箱。
8.2 砖的运输和储存按 GB/T 16546 规定进行。
8.3 砖发出时应附有供方质量部门签发的质量证明书,载明供方名称或厂标、需方名称、发货日期、合同号、标准编号、产品名称、牌号、砖号、批号、相应的理化检验结果等内容。
Refractory bricks for hot blast stove ceramic combustor
1 Range
This standard specifies the classification, shape, size, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of firebricks for ceramic burners in hot blast furnaces.
This standard is applicable to refractory bricks for ceramic burners of hot blast furnaces in iron and steel, non-ferrous smelting and other industries.
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, and 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 5073 refractories compressive creep 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 10325 shaped refractory products acceptance sampling inspection rules
GB/T10326 shaped refractory products size, appearance and section inspection
GB/T 16546 shaped refractory products packaging, marking, transportation and storage
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)
YB/T 5012 firebricks for blast furnaces and hot blast furnaces
3 Terms and definitions
The terms and definitions defined in GB/T 10325 and the following terms and definitions apply to this document.
3.1
Hot blast stove
It refers to the high temperature equipment that provides hot air for blast furnace and other thermal equipment.
3.2
Ceramic combustor refers to the combination of refractory bricks used in the combustion device of hot blast stove.
4 Classification and shape size
4.1 Bricks are divided into four grades according to their main raw materials and properties, namely RTMJ-50, RTMJ-55, RTH-53 and RTH-57, where R, T, M, H and] are respectively the Chinese pinyin initial letters of the first Chinese character of “hot blast stove”, “ceramic burner”, “mullite”, “andalusite” and “cordierite”, and are represented by numbers Al2O3 content.
4.2 The shape and size of the bricks shall comply with the provisions of GB/T 2992.1 and YB/T 5012, and can also be executed 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.
|
Table 1 Physical and chemical indexes of bricks |
|||||
|
Item |
RTMJ-50 |
RTMJ-55 |
RTHJ-53 |
RTH-57 |
|
|
w(Al2O3)/% |
μ0≥ |
50 |
55 |
53 |
57 |
|
σ |
1.5 |
1.5 |
1.5 |
1.5 |
|
|
w(Fe2O3)/% |
μ0≤ |
2 |
1.5 |
1.2 |
1.2 |
|
σ |
0.2 |
0.2 |
0.2 |
0.2 |
|
|
w(MgO)/% |
μ0≤ |
3 |
3 |
2 |
– |
|
σ |
0.5 |
0.5 |
0.5 |
||
|
w(TiO2)/% |
μ0≤ |
– |
– |
0.6 |
0.6 |
|
σ |
– |
– |
0.1 |
0.1 |
|
|
w(Na2O+K2O)/% |
μ0≤ |
1.5 |
1 |
0.6 |
0.6 |
|
σ |
0.2 |
0.2 |
0.1 |
0.1 |
|
|
Apparent porosity/% |
μ0≤ |
25 |
23 |
22 |
22 |
|
σ |
1.5 |
1.5 |
1.5 |
1.5 |
|
|
Bulk density/(g/cm3) |
μ0≥ |
2,20 |
2.3 |
2.3 |
2.4 |
|
σ |
0.05 |
0.05 |
0.05 |
0.05 |
|
|
Compressive strength at room temperature/MPa |
μ0≥ |
50 |
55 |
60 |
60 |
|
Xmin |
30 |
40 |
40 |
40 |
|
|
Softening temperature under load/℃(0.2MPa,T0.6) |
μ0≥ |
1420 |
1480 |
1500 |
1550 |
|
σ |
13 |
13 |
13 |
13 |
|
|
Creep rate/%(0.2MPa,50h) |
μ0≤ |
1200℃ |
1250℃ |
1300℃ |
1400℃ |
|
σ |
0.1 |
0.1 |
0.1 |
0.1 |
|
|
Rate of change of heating water time line/% |
1350℃x2h |
1400℃x2h |
1450℃x2h |
1500℃x2h |
|
|
Xmin~Xmax |
-0.2~+0.2 |
||||
|
Thermal shock resistance/time(1100℃，water-cooling) |
Xmin≥ |
70 |
100 |
100 |
50 |
|
Note: Special shape and hand-shaped products shall be negotiated by both parties. |
|||||
5.2 The permissible size deviation and appearance of the brick shall comply with the provisions of Table 2.
|
Table 2. Permissible size deviation and appearance of bricks Unit in millimeter |
||||
|
Item |
Rated value |
|||
|
Allowable deviation of dimension |
Length |
≤350 |
±2 |
|
|
>350 |
±2.5 |
|||
|
Breadth |
±1 |
|||
|
Thickness |
±1 |
|||
|
Thickness relative deviation |
≤350 |
≤0.5 |
||
|
>350 |
≤1 |
|||
|
Contort |
≤1 |
|||
|
Missing Angle length(a+b+c) |
40 |
|||
|
Missing edge length(e+f+g) |
50 |
|||
|
Hole diameter |
Working face |
6 |
||
|
Non-working face |
8 |
|||
|
Crack length |
Breadth≤0.25 |
No limit |
||
|
Breadth 0.26~0.5 |
30 |
|||
|
Breadth>0.5 |
Be forbidden from |
|||
|
Note 1: The fracture spalling of brick is evaluated according to the crack value. Note 2: When there are two or more defects on the working surface of the same brick, the single defect shall be calculated as 0.7 times of the index in the table. Note 3: Special shape and hand-shaped products shall be settled by negotiation between the supply and demand parties. |
||||
5.3 The prelaying requirements of the brick assembly shall comply with the provisions of Table 3.
|
Table 3 Prelaying requirements of brick assembly Unit in millimeter |
||
|
Test item |
Error requirement |
|
|
Working layer |
Non-working layer |
|
|
Elevation (per meter) |
-5~0 |
|
|
Radius |
±5 |
|
|
Faulting of platforms |
≤1 |
≤2 |
|
Perpendicularity (per meter) |
≤3 |
|
|
Levelness (per meter) |
≤5 |
|
|
Vertical joint |
≤2 |
|
|
Ring seam |
≤3 |
|
|
Note 1: After the assembly is prelaid, the manufacturer shall prepare a detailed predrawing and mark the corresponding number on each brick. Note 2: The ceramic burners of internal combustion type and external combustion type hot blast stove shall be settled by the supply and demand parties through negotiation. |
||
6 Test methods
6.1 Bricks shall be inspected and prepared according to GB/T 7321.
6.2 The determination of Al2O3, Fe2O3,MgO, TiO2, Na2O and K2O was carried out according to GB/T 6900.
6.3 The apparent porosity was determined according to GB/T 2997.
6.4 The compressive strength at room temperature shall be measured according to GB/T 5072.
6.5 The load softening temperature was measured according to YB/T 370.
6.6 The change rate of the heating permanent line is determined according to GB/T 5988.
6.7 The creep rate was measured in GB/T 5073.
6.8 Thermal shock resistance was measured according to YB/T 376.1.
6.9 The measurement of size, appearance and section of bricks shall be carried out according to GB/T 10326.
7 Quality assessment procedures
7.1 Batch
Products according to the same brand group batch, a group of hot blast stove burner bricks for a batch.
7.2 Sampling and acceptance
The sampling and acceptance of bricks shall be carried out according to GB/T 10325. The content of alumina in chemical composition, thermal shock resistance, compressive strength at room temperature and softening temperature under load 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 bricks shall be packed with pallets or according to user requirements; The assembly shall be packed in order according to the prepacking number.
8.2 Bricks are transported and stored in accordance with GB/T 16546.
8.3 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, the date of delivery, the contract number, the standard number, the product name, the brand number, the brick number, the lot number, and the corresponding physical and chemical inspection results.
