YB∕T 4765-2019 无碳钢包衬砖/Non-carbon ladle lining bricks
无碳钢包衬砖
1 范围
本标准规定了无碳钢包衬砖的牌号、形状尺寸、技术要求、试验方法、质量评定程序、包装、标志、运输、储存及质量证明书。
本标准适用于砌筑钢包工作层用不烧无碳内衬制品。
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 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 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 5988耐火材料 加热永久线变化试验方法
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(非示差一升温法)
YB/T 4198 钢包用耐火砖形状尺寸
3 牌号及形状尺寸
3.1 无碳钢包衬砖按理化指标分为 GLM95、GLM93、GLM90、GLM85 四个牌号。牌号中“G”、“L”、“M”分别为“钢”、“铝”、“镁”的汉语拼音首字母,其后的阿拉伯数字为三氧化铝和氧化镁合量的质量百分数。3.2 无碳钢包衬砖的形状及尺寸应优先采用 YB/T 4198 的规定,也可由供需双方协商确定。
4 技术要求
4.1 无碳钢包衬砖的理化指标应符合表1的规定。
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表1无碳钢包衬砖的理化指标 |
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项目 |
指 标 |
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GLM-95 |
GLM-93 |
GLM-90 |
GLM-85 |
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w(Al₂O₃ +MgO)/% |
μ0≥ |
95 |
93 |
90 |
85 |
|
σ |
1.0 |
||||
|
常温耐压强度/MPa |
μ0≥ |
50 |
45 |
40 |
35 |
|
Xmin |
39 |
35 |
30 |
25 |
|
|
σ |
10 |
||||
|
显气孔率/% |
μ0≤ |
15 |
16 |
17 |
20 |
|
σ |
1 |
||||
|
体积密度/g.cm-3 |
μ0≥ |
3 |
2.95 |
2.9 |
2.7 |
|
σ |
0.10 |
||||
|
0.2MPa荷重软化温度T2.0/℃ |
μ0≥ |
1570 |
1550 |
1530 |
1500 |
|
σ |
15 |
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加热永久线变化(1550℃X3h)/% |
Xmin~Xmax |
0~+1.5 |
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4.2 无碳钢包衬砖的尺寸允许偏差及外观应符合表 2的规定。
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表2无碳钢包衬砖的尺寸允许偏差及外观 单位为毫米 |
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项目 |
允许偏差 |
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尺寸允许偏差 |
砌筑高度方向 |
±1 |
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其他方向 |
±2 |
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相对边差 |
≤1 |
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扭曲 |
≤1 |
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缺角、缺棱长度 (a+b+c)、(e+f+g) |
工作面 |
≤45 |
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非工作面 |
≤60 |
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裂纹长度 |
宽度≤0.10 |
不准跨两个及以上的棱 |
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宽度0.11~0.25 |
工作面 |
不准有 |
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非工作面 |
≤50 |
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宽度>0.25 |
不准有 |
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注1:工作面系指接触钢水的端面。 |
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5 试验方法
5.1 检验制样按 GB/T 7321 进行。
5.2 Al2O3,、MgO 的测定按 GB/T 5069 或 GB/T 21114 进行。
5.3 常温耐压强度的测定按 GB/T 5072 进行。
5.4 体积密度和显气孔率的测定按 GB/T 2997 进行。
5.5荷重软化温度的测定按 YB/T 370 进行。
5.6加热永久线变化的测定按 GB/T 5988 进行。
5.7 外观、尺寸及断面的检査按 GB/T 10326 进行。
6 质量评定程序
6.1 组批
按同一牌号、同一工艺生产的产品进行组批,每批不超过 120t。
6.2 抽样及合格判定规则
6.2.1 产品的抽样和验收按 GB/T 10325 进行。
6.2.2 化学成分、常温耐压强度和加热永久线变化为验收检验项目。
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、储存及质量证明书
7.1 产品的包装、标志、运输和储存按 GB/T 16546 进行,或根据供需双方协议进行。
7.2 产品出厂时均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、发货日期、产品名称、牌号、砖号、批号及相应的理化指标等内容。
Non-carbon ladle lining bricks
1 Range
This standard specifies the grade, shape, size, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificate of non-carbon steel clad brick.
This standard is applicable to non-burning non-carbon lining products for the working layer of ladle masonry.
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.
Test method for bulk density, apparent porosity and true porosity of GB/T 2997 compact shaped refractory products
GB/T 5069 method for chemical analysis of MG-Al refractories
GB/T 5072 refractories – normal temperature compressive strength test method
GB/T 5988 refractory heating permanent line change 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 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 rising temperature method)
YB/T 4198 firebrick for ladle shape and dimension
3 grade and shape size
3.1 Non-carbon steel clad brick according to physical and chemical indexes are divided into GLM95, GLM93, GLM90, GLM85 four grades. In the brand, “G”, “L” and “M” are the initial letters of Chinese pinyin for “steel”, “aluminum” and “magnesium” respectively, and the Arabic numerals after them are the mass percentage of the combined amount of trialumina and magnesium oxide. 3.2 The shape and size of the non-carbon steel clad brick shall preferentially adopt the provisions of YB/T 4198, which may also be determined by the supply and demand parties through negotiation.
4 Technical Requirements
4.1 The physical and chemical indexes of non-carbon steel clad brick shall comply with the provisions of Table 1.
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Table 1 Physical and chemical indexes of non-carbon steel clad brick |
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Item |
Index |
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GLM-95 |
GLM-93 |
GLM-90 |
GLM-85 |
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w(Al₂O₃ +MgO)/% |
μ0≥ |
95 |
93 |
90 |
85 |
|
σ |
1.0 |
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Compressive strength at room temperature/MPa |
μ0≥ |
50 |
45 |
40 |
35 |
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Xmin |
39 |
35 |
30 |
25 |
|
|
σ |
10 |
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Apparent porosity/% |
μ0≤ |
15 |
16 |
17 |
20 |
|
σ |
1 |
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Bulk density /g.cm-3 |
μ0≥ |
3 |
2.95 |
2.9 |
2.7 |
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σ |
0.10 |
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0.2MPaSoftening temperature under loadT2.0/℃ |
μ0≥ |
1570 |
1550 |
1530 |
1500 |
|
σ |
15 |
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Heating permanent line change(1550℃X3h)/% |
Xmin~Xmax |
0~+1.5 |
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4.2 The size permissible deviation and appearance of non-carbon steel clad brick shall comply with the provisions of Table 2.
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Table 2 Size tolerance and appearance of non-carbon steel clad brick Unit in millimeter |
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Item |
Allowable deviation |
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Allowable deviation of dimension |
Masonry height direction |
±1 |
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Other direction |
±2 |
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Relative edge difference |
≤1 |
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Contort |
≤1 |
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Missing Angle, missing edge length(a+b+c)、(e+f+g) |
Working face |
≤45 |
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Non-working face |
≤60 |
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Crack length |
Breadth≤0.10 |
Do not cross more than two edges |
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Breadth0.11~0.25 |
Working face |
Be forbidden from |
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Non-working face |
≤50 |
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Breadth>0.25 |
Be forbidden from |
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Note 1: The working face is the end face that contacts the molten steel. Note 2: The allowable deviation of masonry height direction dimension is graded as required. |
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5 Test methods
5.1 Test sample preparation shall be carried out according to GB/T 7321.
5.2 Determination of Al2O3, MgO according to GB/T 5069 or GB/T 21114.
5.3 The compressive strength at room temperature shall be measured according to GB/T 5072.
5.4 The bulk density and apparent porosity were measured according to GB/T 2997.
5.5 The load softening temperature was measured according to YB/T 370.
5.6 The determination of permanent line change of heating was performed according to GB/T 5988.
5.7 The inspection of appearance, size and section shall be carried out according to GB/T 10326.
6 Quality assessment procedures
6.1 Batch Groups
Batch of products produced by the same brand and the same process, with each batch not exceeding 120t.
6.2 Sampling and conformity determination rules
6.2.1 Sampling and acceptance of products shall be carried out according to GB/T 10325.
6.2.2 Chemical composition, compressive strength at room temperature and permanent heating line change are acceptance inspection items.
6.3 Form of conformity assessment
Conformity assessment can be carried out in the form of supplier declaration, user certification or third-party certification.
7 Packing, marking, transportation, storage and quality certificate
7.1 Products are packed, marked, transported and stored in GB/T 16546 or in accordance with the agreement of the parties.
7.2 The product shall be accompanied by a quality certificate issued by the quality supervision department of the supplier, indicating the name of the supplier, the name of the demander, the date of delivery, the name of the product, the brand number, the brick number, the batch number and the corresponding physical and chemical index.
