YB/T 4500-2016 焦炉用大型表面复合预制件/Large sized combined pre-formed shape for coke oven
焦炉用大型表面复合预制件
1 范围
本标准规定了焦炉用大型表面复合预制件的术语和定义、牌号、技术要求、试样制备、试验方法、质量评定程序、包装、标志、运输、储存和质量证明书。
本标准适用于莫来石一堇青石质表面附着低膨胀微晶陶瓷釉层大型预制件,也适用于同材质非表面复合大型预制件,主要用于焦炉炉门、装煤口及煤气上升管等热工设备的内衬。
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 3001 耐火材料 常温抗折强度试验方法
GB/T 5069镁铝系耐火材料化学分析方法
GB/T 5072耐火材料 常温耐压强度试验方法
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 18930耐火材料术语
GB/T 21114耐火材料 X射线荧光光谱化学分析 熔铸玻璃片法
GB/T 308733 耐火材料 抗热震性试验方法
YB/T 4130耐火材料 导热系数试验方法(水流量平板法)
YB/T 5200致密耐火浇注料 显气孔率和体积密度试验方法
YB/T 5202.1 不定形耐火材料试样制备方法 第1部分:耐火浇注料
3术语和定义
GB/T 18930 界定的以及下列术语和定义适用于本文件。
3.1
表面复合预制件combined preformed shape
在预制件表面喷涂低膨胀微晶陶瓷釉料,经烧成制得的预制件。
4 牌号
按照氧化铝含量和使用部位不同,预制件共分为5个牌号,分别为 MJ-50-L、MJ-50-S、MJ-50(B)-S、MJ-45-2、MJ-45(B)-Z;其中,M、J、L、Z、S分别是莫来石、革青石、炉门、装煤口、上升管首个字的汉语拼音首字母。后面的数字代表氧化铝的质量百分数,B表示不挂釉。
5 技术要求
5.1 预制件的理化指标应符合表1、表2的规定。
5.2 预制件的尺寸允许偏差和外观应符合表3的规定。
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表1焦炉用大型表面复合预制件的理化指标(挂釉) |
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项目 |
指标 |
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焦炉炉门 |
煤气上升管 |
装煤口 |
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MJ-50-L |
MJ-50-S |
MJ-45-Z |
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w(Al2O3)/% |
≥ |
50 |
50 |
45 |
|
w(MgO)/% |
3.0 |
2.5 |
2.5 |
|
|
显气孔率/% |
≤ |
28 |
||
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体积密度/g*cm-3 |
≥ |
2.1 |
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常温耐压强度/MPa |
35 |
40 |
45 |
|
|
抗折强度/MPa |
4.0 |
4.5 |
4.5 |
|
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导热系数(1000℃(热面)) |
≤ |
1.2 |
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抗热震性(1100℃,水冷)/次 |
≥ |
50 |
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表2焦炉用大型表面复合预制件的理化指标(不挂釉) |
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项目 |
指 标 |
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煤气上升管 |
装煤口 |
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MJ-50(B)-S |
MJ-45(B)-Z |
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w(Al2O3)/% |
≥ |
50 |
45 |
|
|
w(MgO)/% |
2.5 |
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显气孔率/% |
110℃X24h烘干后 |
≤ |
28 |
|
|
1350℃X3h烧后 |
||||
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体积密度/g.cm-3 |
110℃X24h烘干后 |
≥ |
2.1 |
|
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常温耐压强度/MPa |
110℃X24h烘干后 |
35 |
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1350℃X3h烧后 |
40 |
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常温抗折强度/MPa |
110℃X24h烘干后 |
3.5 |
3.0 |
|
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1350℃X3h烧后 |
4.0 |
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导热系数(1000℃(热面))/W·(m，K)-1 |
≤ |
1.2 |
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抗热震性(1100℃,水冷)/次 |
≥ |
50 |
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表3焦炉用大型表面复合预制件的尺寸允许偏差和外观 单位为毫米 |
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项 目 |
指 标 |
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尺寸允许偏差 |
长 |
宽 |
厚 |
固定螺栓间距 |
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-4~+2 |
-5~0 |
-4~+4 |
-2~+2 |
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缺角长度(a+b+c) |
≤ |
80 |
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缺棱长度(e+f+g) |
80 |
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裂纹长度 |
非釉面 |
宽度≤0.25 |
不限制 |
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0.25<宽度≤0.50 |
70 |
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0.5<宽度 |
不准有 |
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釉面 |
宽度≤0.25 |
不限制 |
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0.25<宽度≤0.50 |
70 |
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0.5<宽度 |
35 |
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釉面 |
1.加煤口密封面不能有釉泡。釉面无开片。 |
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6试样制备
6.1 预制件试样制备按 YB/T 5202.1 进行。
6.2 挂釉预制件试样,取同步生产的釉料在 A 型试样的“230X114”的一个面不挂釉,其余面挂釉,与B型、C型试样一起,随同生产中已经挂好釉的预制件在同一个高温窑中同等条件下烧成。
6.3 挂釉预制件试样规格及数量见表 4。
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表4挂釉预制件的试样规格及数量 |
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试样型号 |
试样尺寸/mm |
检测项目 |
试样数量/块 |
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A型 |
230X114x65 |
抗热震性 |
6 |
|
B型 |
160X40x40 |
耐压强度、抗折强度、显气孔率、体积密度 |
6 |
|
C型 |
ф(160~180)X(20~25) |
导热系数 |
2 |
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注:试样的制备数量不得少于表格中的数量(含保留样)。 |
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7试验方法
7.1 化学成分的测定按 GB/T 5069 或 GB/T 21114 进行。化学成分测定时为不包含釉面的本体材料。
7.2 显气孔率、体积密度的测定按 YB/T 5200 进行。
7.3 抗热震性的测定按 GB/T 30873 进行,测试时记录釉面的破坏状况
7.4 导热系数的测定按 YB/T 4130 进行。
7.5 常温抗折强度的测定按 GB/T 3001 进行。
7.6 常温耐压强度的测定按 GB/T 5072 进行。
7.7 预制件的外观、尺寸及断面的检查按 GB/T 10326 进行。
Large sized combined pre-formed shape for coke oven
1 Range
This standard specifies the terms and definitions, grades, technical requirements, sample preparation, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of large surface composite prefabricated parts for coke ovens.
This standard is applicable to mullite and cordierite surface attached low expansion ceramic ceramic glaze layer of large prefabricated parts, also applicable to the same material non-surface composite large prefabricated parts, mainly used in coke oven door, coal loading port and gas riser and other thermal equipment 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 3001 refractories – Bending strength test method at room temperature
GB/T 5069 method for chemical analysis of MG-Al refractories
GB/T 5072 refractories – normal temperature compressive strength test method
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 18930 refractory terminology
GB/T 21114 refractories by X-ray fluorescence spectrochemical analysis of fused cast glass sheets
GB/T 308733 Test method for thermal shock resistance of refractory materials
Test method for thermal conductivity of YB/T 4130 Refractories (Water flow plate method)
Test method for apparent porosity and bulk density of YB/T 5200 dense refractory castables
YB/T 5202.1 Methods for preparing samples of amorphous refractories – Part 1: Refractory castables
3 Terms and definitions
GB/T 18930 and the following terms and definitions apply to this document.
3.1
Combined pre-formed shape
The prefabricated parts are prepared by firing of low expansion ceramic ceramic glaze sprayed on the surface of the prefabricated parts.
4 Brand
According to the different alumina content and use parts, the prefabricated parts are divided into 5 grades, respectively, MJ-50-L, MJ-50-S, MJ-50(B)-S, MJ-45-2, MJ-45(B)-Z; Among them,M, J, L, Z and S are respectively the Chinese pinyin initials of the first word of mullite, leather bluestone, furnace door, coal loading port and riser. The number behind represents the mass percentage of alumina, and B means no glaze.
5 Technical Requirements
5.1 The physical and chemical indexes of the prefabricated parts shall comply with the provisions of Table 1 and Table 2.
5.2 The permissible size deviation and appearance of the prefabricated parts shall comply with the provisions of Table 3.
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Table 1 Physical and chemical indexes of large surface composite prefabricated parts for coke ovens (hanging glaze) |
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Item |
Index |
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Coke oven door |
Gas riser |
Coaling inlet |
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MJ-50-L |
MJ-50-S |
MJ-45-Z |
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w(Al2O3)/% |
≥ |
50 |
50 |
45 |
|
w(MgO)/% |
3.0 |
2.5 |
2.5 |
|
|
Apparent porosity/% |
≤ |
28 |
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Bulk density/g*cm-3 |
≥ |
2.1 |
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Compressive strength at room temperature/MPa |
35 |
40 |
45 |
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Flexural strength/MPa |
4.0 |
4.5 |
4.5 |
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Thermal conductivity (1000℃(Hot surface)) |
≤ |
1.2 |
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Thermal shock resistance(1100℃,Water cooling)/ time |
≥ |
50 |
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Table 2 Physical and chemical indexes of large surface composite prefabricated parts for coke ovens (without hanging glaze) |
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Item |
Index |
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Gas riser |
Coaling inlet |
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MJ-50(B)-S |
MJ-45(B)-Z |
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w(Al2O3)/% |
≥ |
50 |
45 |
|
|
w(MgO)/% |
2.5 |
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Apparent porosity/% |
110℃X24h After drying |
≤ |
28 |
|
|
1350℃X3h After burning |
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Bulk density/g.cm-3 |
110℃X24h After drying |
≥ |
2.1 |
|
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Compressive strength at room temperature/MPa |
110℃X24h After drying |
35 |
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1350℃X3h After burning |
40 |
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Flexural strength at room temperature/MPa |
110℃X24h After drying |
3.5 |
3.0 |
|
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1350℃X3h After burning |
4.0 |
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Thermal conductivity(1000℃(Hot surface))/W·(m，K)-1 |
≤ |
1.2 |
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Thermal shock resistance(1100℃,Water cooling)/ time |
≥ |
50 |
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Table 3 Size tolerance and appearance of large surface composite prefabricated parts for coke ovens Unit in millimeter |
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Item |
Index |
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Allowable deviation of dimension |
Long |
Breadth |
Thick |
Anchor bolt spacing |
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-4~+2 |
-5~0 |
-4~+4 |
-2~+2 |
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cAllowable deviation of dimension(a+b+c) |
≤ |
80 |
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Missing edge length(e+f+g) |
80 |
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Crack length |
Unglazed surface |
Breadth≤0.25 |
No limit |
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0.25<Breadth≤0.50 |
70 |
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0.5<Breadth |
Be forbidden from |
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Glaze |
Breadth≤0.25 |
No limit |
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0.25<Breadth≤0.50 |
70 |
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0.5<Breadth |
35 |
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Glaze |
1. The sealing surface of the coal filling port should not have glaze bubbles. No open glaze. 2. The glaze is uniform, smooth and flat; Glaze thickness ≥1.0mm. 3. The total area of missing glaze on the surface of each prefabricated block is less than 30mm², and only 1 place is allowed. |
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6 Sample preparation
6.1 Sample preparation of prefabricated parts shall be carried out according to YB/T 5202.1.
6.2 For the sample of glaze prefabricated parts, the glaze produced simultaneously is not hung on one side of “230X114” of type A sample, and the glaze is hung on the other side. Together with type B and type C samples, the glaze is burned in the same high-temperature kiln under the same conditions as the prefabricated parts that have been hung in production.
6.3 The sample specifications and quantities of hanging glaze prefabricated parts are shown in Table 4.
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Table 4 Sample specifications and quantity of hanging glaze prefabricated parts |
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Sample type |
Sample size/mm |
Test item |
Number of samples/pieces |
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Type A |
230X114x65 |
Thermal shock resistance |
6 |
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Type B |
160X40x40 |
Compressive strength, flexural strength, apparent porosity, bulk density |
6 |
|
Type C |
ф(160~180)X(20~25) |
Thermal conductivity |
2 |
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Note: The number of samples prepared shall not be less than the number in the table (including reserved samples). |
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7 Test methods
7.1 Chemical composition is determined in GB/T 5069 or GB/T 21114. When the chemical composition is determined, it is the body material that does not contain the glaze.
7.2 The apparent porosity and bulk density were measured according to YB/T 5200.
7.3 The thermal shock resistance is measured according to GB/T 30873, and the damage status of the glaze is recorded during the test
7.4 Thermal conductivity was measured according to YB/T 4130.
7.5 The flexural strength at room temperature is measured according to GB/T 3001.
7.6 The compressive strength at room temperature shall be measured according to GB/T 5072.
7.7 Inspection of appearance, size and section of prefabricated parts shall be carried out according to GB/T 10326.
