YB／T 4111-2019 铸口砖及座砖/Casting brick and seat brick
铸口砖及座砖
1范围
本标准规定了铸口砖及座砖的分类、牌号及形状尺寸、技术要求、试验方法、质量评定程序、包装、标志、运输、储存及质量证明书
本标准适用于转炉、钢包、中间包用铸口砖及座砖。
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 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 4513.2 不定形耐火材料 第2部分:取样
GB/T 4513.6 不定形耐火材料 第6部分:物理性能的测定
GB/T 5072耐火材料 常温耐压强度试验方法
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/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 16555含碳、碳化硅、氮化物耐火材料化学分析方法
GB/T 21114 耐火材料 X射线光光谱化学分析 熔铸玻璃片法
3分类牌号及形状尺寸
3.1铸口砖及座砖的分类及牌号见表1和表 2。其中K、2分别为“口”、“座”汉语拼音首字母,分别代表铸口砖和座砖,其中L、M、T、G分别为“铝”“镁”“碳”“钻“汉语拼音首字母,数字分别为氧化铝和氧化镁的质量百分含量。
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表1铸口砖的分类及牌号 |
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|
品种 |
刚玉质 |
铝碳质 |
铝锆碳质 |
铝镁碳质 |
镁碳质 |
|||
|
铸口砖 |
KL-90 |
KLT-85 |
KLT-75 |
KLT-65 |
KLGT-75 |
KLMT-65 |
KMT-80 |
KMT-70 |
|
表2座砖的分类及牌号 |
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|
品种 |
刚玉质 |
高铝质 |
铝碳质 |
铝镁碳质 |
镁碳质 |
|||||
|
座砖 |
ZL-90 |
ZL-80 |
ZL-65 |
ZLT-90 |
ZLT-80 |
ZLT-70 |
ZLMT-65 |
ZLMT-55 |
ZMT-80 |
ZMT-70 |
3.2 铸口砖及座砖的形状尺寸由供需双方协商确定。
4技术要求
4.1铸口砖的理化性能指标应符合表3的规定。
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表3铸口砖的理化性能指标 |
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|
项目 |
指标 |
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|
刚玉质 |
铝碳质 |
铝锆碳质 |
镁碳质 |
铝镁碳质 |
||||||
|
KL-90 |
KLT-85 |
KLT-75 |
KLT-65 |
KLGT-75 |
KMT-80 |
KMT-70 |
KLMT-65 |
|||
|
w(Al2O3)/% |
μ0 |
≥ |
90 |
85 |
75 |
65 |
75 |
– |
– |
65 |
|
σ |
1.5 |
|||||||||
|
w(MgO)/% |
μ0 |
≥ |
– |
– |
– |
– |
– |
80 |
70 |
5 |
|
σ |
1.5 |
|||||||||
|
w(ZrO2)/% |
μ0 |
≥ |
– |
– |
– |
– |
4 |
– |
– |
– |
|
σ |
1 |
|||||||||
|
w(C)/% |
μ0 |
≥ |
– |
2 |
2 |
4 |
3 |
5 |
5 |
2 |
|
σ |
1 |
|||||||||
|
显气孔率/% |
μ0 |
≤ |
20 |
14 |
14 |
14 |
8 |
12 |
12 |
14 |
|
σ |
1 |
|||||||||
|
体积密度/(g/cm3) |
μ0 |
≥ |
3 |
2.9 |
2.7 |
2.6 |
3 |
2.85 |
2.75 |
2.8 |
|
σ |
0.05 |
|||||||||
4.2座砖的理化性能指标应符合表4的规定。
|
表4座砖的理化性能指标 |
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|
项目 |
指 标 |
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|
刚玉质 |
高铝质 |
铝碳质 |
铝镁碳 |
镁碳质 |
||||||||
|
ZG-90 |
ZL-80 |
ZL-65 |
ZLT-90 |
ZLT-80 |
ZLT-70 |
ZLMT-65 |
ZLMT-55 |
ZMT-80 |
ZMT-70 |
|||
|
w(Al2O3)/% |
μ0 |
≥ |
90 |
80 |
65 |
90 |
80 |
70 |
65 |
55 |
– |
– |
|
σ |
1.5 |
|||||||||||
|
w(MgO)/% |
μ0 |
≥ |
– |
– |
– |
– |
8 |
8 |
80 |
70 |
||
|
σ |
1.5 |
|||||||||||
|
w(ZrO2)/% |
μ0 |
≥ |
– |
– |
– |
3 |
3 |
5 |
5 |
5 |
6 |
6 |
|
σ |
1 |
|||||||||||
|
w(C)/% |
μ0 |
≥ |
40 |
30 |
25 |
40 |
35 |
35 |
40 |
25 |
25 |
25 |
|
σ |
10 |
|||||||||||
|
显气孔率/% |
μ0 |
≤ |
22 |
22 |
25 |
23 |
23 |
23 |
16 |
23 |
8 |
8 |
|
σ |
1 |
|||||||||||
|
体积密度/(g/cm3) |
μ0 |
≥ |
2.95 |
2.7 |
2.65 |
2.95 |
2.85 |
2.8 |
2.85 |
2.6 |
2.85 |
2.75 |
|
σ |
0.05 |
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4.3铸口砖及座砖的尺寸允许偏差及外观应符合表5的规定。
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表5 铸口砖和座砖的尺寸允许偏差及外观 单位为毫米 |
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|
项目 |
指标 |
|||||
|
铸口砖 |
上座砖 |
下座砖 |
||||
|
尺寸允许偏差 |
长度和宽度 |
≤ |
– |
±3 |
±3 |
|
|
厚度或高度 |
≤ |
±2 |
±3 |
+3 -1 |
||
|
内径 |
≤ |
±2 |
±3 |
+3 -1 |
||
|
外径 |
≤ |
±2 |
±3 |
±2 |
||
|
子母口:直径、深度或高度 |
≤ |
±1 |
±2 |
±2 |
||
|
厚度相对偏差 |
≤ |
– |
3 |
2 |
||
|
端头平面倾斜 |
≤ |
2 |
– |
– |
||
|
缺棱缺角深度 |
工作面及接缝处 |
≤ |
5 |
15 |
10 |
|
|
其他面 |
≤ |
8 |
20 |
15 |
||
|
裂纹长度 |
宽度≤0.10 |
≤ |
不限制 |
|||
|
宽度 0.11~0.25 |
工作面 |
不准有 |
不限制 |
|||
|
非工作面 |
50 |
|||||
|
宽度 0.11~0.25 |
工作面 |
不准有 |
30 |
|||
|
非工作面 |
30 |
50 |
||||
|
宽度>0.5 |
不准有 |
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|
注1:工作面指钢水接触面; |
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5试验方法
5.1铸口砖试样的制备按GB/T 7321进行,化学分析在工作面10mm之内取样;座砖预制件试样的制备在座砖生产时按照GB/T 4513.2进行同步制样。
5.2氧化铝的测定按GB/T 6900或GB/T 21114进行。
5.3氧化镁和碳的测定按GB/T 16555或GB/T 21114进行。
5.4机压成型产品显气孔率、体积密度的测定按GB/T 2997进行;浇注预制成型产品显气孔率、体积密度的测定按GB/T 4513.6进行。
5.5常温耐压强度的测定按GB/T 5072进行。
5.6尺寸、外观的检查按GB/T 10326进行。
5.7铸口砖端头平面倾斜的检查。
5.7.1量具:使用高度(深度)游标卡尺。
5.7.2将铸口砖放在平板上,测量其高度最大值、最小值,两值之差即为端头平面倾斜数值。
6质量评定程序
6.1铸口砖以1000块为一批;座砖以500块为一批。
6.2抽样及合格判定规则
抽样及验收按GB/T 10325进行,座砖以常温耐压强度、显气孔率、体积密度为验收检验项目,铸口砖以显气孔率、体积密度为验收检验项目。
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标志、包装、运输、储存及质量证明书
7.1产品的标志、包装、运输和储存按GB/T 16546进行。
7.2产品发出时必须附有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、执行标准、生产日期、牌号、发货批号和质量检验结果等项目。
Casting brick and seat brick
1 Range
This standard specifies the classification, grade, shape and size, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of cast and seat bricks
This standard is applicable to casting brick and seat brick for converter, ladle and intermediate ladle.
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.
Test method for bulk density, apparent porosity and true porosity of GB/T 2997 compact shaped refractory products.
GB/T 4513.2 Amorphous refractories – Part 2: Sampling
GB/T 4513.6 Amorphous refractories – Part 6: Determination of physical properties
GB/T 5072 refractories – normal temperature compressive strength 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/T 10326 shaped refractory products size, appearance and section inspection method
GB/T 16546 shaped refractory products packaging, marking, transportation and storage
GB/T 16555 Method for chemical analysis of refractories containing carbon, silicon carbide and nitride
GB/T 21114 refractories by X-ray photospectrochemical analysis of fused cast glass sheets
3 Classification grade and shape size
3.1 The classification and grade of cast brick and seat brick are shown in Table 1 and Table 2. Where K and 2 are the initial letters of “mouth” and “seat” respectively, representing the casting brick and seat brick respectively, where L, M, T and G are the initial letters of “aluminum”, “magnesium”, “carbon” and “drill” respectively, and the numbers are the mass percentage content of alumina and magnesium oxide respectively.
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Table 1 Classification and grade of cast brick |
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|
Breed |
Corundum |
Aluminocarbon |
Aluminum zirconium carbon |
Aluminum magnesium carbon |
Magnesiocarbon |
|||
|
铸口砖 |
KL-90 |
KLT-85 |
KLT-75 |
KLT-65 |
KLGT-75 |
KLMT-65 |
KMT-80 |
KMT-70 |
|
Table 2 classification and grade of bricks |
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|
Breed |
Corundum |
High alumina |
Magnesiocarbon |
Aluminum magnesium carbon |
Magnesiocarbon |
|||||
|
座砖 |
ZL-90 |
ZL-80 |
ZL-65 |
ZLT-90 |
ZLT-80 |
ZLT-70 |
ZLMT-65 |
ZLMT-55 |
ZMT-80 |
ZMT-70 |
3.2 The shape and size of cast brick and seat brick shall be determined by both parties through negotiation.
4 Technical Requirements
4.1 The physical and chemical properties of cast brick shall conform to the provisions of Table 3.
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Table 3. Physical and chemical properties of cast brick |
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|
Item |
Index |
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|
Aluminocarbon |
Aluminum zirconium carbon |
Aluminum zirconium carbon |
Magnesiocarbon |
Aluminum zirconium carbon |
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|
KL-90 |
KLT-85 |
KLT-75 |
KLT-65 |
KLGT-75 |
KMT-80 |
KMT-70 |
KLMT-65 |
|||
|
w(Al2O3)/% |
μ0 |
≥ |
90 |
85 |
75 |
65 |
75 |
– |
– |
65 |
|
σ |
1.5 |
|||||||||
|
w(MgO)/% |
μ0 |
≥ |
– |
– |
– |
– |
– |
80 |
70 |
5 |
|
σ |
1.5 |
|||||||||
|
w(ZrO2)/% |
μ0 |
≥ |
– |
– |
– |
– |
4 |
– |
– |
– |
|
σ |
1 |
|||||||||
|
w(C)/% |
μ0 |
≥ |
– |
2 |
2 |
4 |
3 |
5 |
5 |
2 |
|
σ |
1 |
|||||||||
|
Apparent porosity/% |
μ0 |
≤ |
20 |
14 |
14 |
14 |
8 |
12 |
12 |
14 |
|
σ |
1 |
|||||||||
|
Bulk density/(g/cm3) |
μ0 |
≥ |
3 |
2.9 |
2.7 |
2.6 |
3 |
2.85 |
2.75 |
2.8 |
|
σ |
0.05 |
|||||||||
4.2 The physical and chemical properties of bricks shall conform to the provisions of Table 4.
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Table 4 physical and chemical properties of bricks |
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|
Item |
Index |
|||||||||||
|
Corundum |
High alumina |
Magnesiocarbon |
Almagite |
Magnesiocarbon |
||||||||
|
ZG-90 |
ZL-80 |
ZL-65 |
ZLT-90 |
ZLT-80 |
ZLT-70 |
ZLMT-65 |
ZLMT-55 |
ZMT-80 |
ZMT-70 |
|||
|
w(Al2O3)/% |
μ0 |
≥ |
90 |
80 |
65 |
90 |
80 |
70 |
65 |
55 |
– |
– |
|
σ |
1.5 |
|||||||||||
|
w(MgO)/% |
μ0 |
≥ |
– |
– |
– |
– |
8 |
8 |
80 |
70 |
||
|
σ |
1.5 |
|||||||||||
|
w(ZrO2)/% |
μ0 |
≥ |
– |
– |
– |
3 |
3 |
5 |
5 |
5 |
6 |
6 |
|
σ |
1 |
|||||||||||
|
w(C)/% |
μ0 |
≥ |
40 |
30 |
25 |
40 |
35 |
35 |
40 |
25 |
25 |
25 |
|
σ |
10 |
|||||||||||
|
Apparent porosity/% |
μ0 |
≤ |
22 |
22 |
25 |
23 |
23 |
23 |
16 |
23 |
8 |
8 |
|
σ |
1 |
|||||||||||
|
Bulk density/(g/cm3) |
μ0 |
≥ |
2.95 |
2.7 |
2.65 |
2.95 |
2.85 |
2.8 |
2.85 |
2.6 |
2.85 |
2.75 |
|
σ |
0.05 |
|||||||||||
4.3 The size permissible deviation and appearance of the cast brick and seat brick shall comply with the provisions of Table 5.
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Table 5 The permissible size deviation and appearance unit of cast brick and seat brick is mm |
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|
Item |
Index |
|||||
|
Mouth brick |
Top brick |
Bottom block |
||||
|
Allowable deviation of dimension |
Length和Breadth |
≤ |
– |
±3 |
±3 |
|
|
Thickness or height |
≤ |
±2 |
±3 |
+3 -1 |
||
|
Inside diameter |
≤ |
±2 |
±3 |
+3 -1 |
||
|
Outside diameter |
≤ |
±2 |
±3 |
±2 |
||
|
Mouth: Diameter, depth, or height |
≤ |
±1 |
±2 |
±2 |
||
|
Thickness relative deviation |
≤ |
– |
3 |
2 |
||
|
The end plane is tilted |
≤ |
2 |
– |
– |
||
|
Depth of missing edges and corners |
Working face and joint |
≤ |
5 |
15 |
10 |
|
|
Other side |
≤ |
8 |
20 |
15 |
||
|
Crack length |
Breadth≤0.10 |
≤ |
No limit |
|||
|
Breadth 0.11~0.25 |
Working face |
Be forbidden from |
No limit |
|||
|
Non-working face |
50 |
|||||
|
Breadth 0.11~0.25 |
Working face |
Be forbidden from |
30 |
|||
|
Non-working face |
30 |
50 |
||||
|
Breadth>0.5 |
Be forbidden from |
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|
Note 1: The working face refers to the contact surface of molten steel; Note 2: For the whole seat brick, the height of the upper casting brick installation part shall be carried out according to the requirements of the lower seat brick, and the other parts shall be carried out according to the requirements of the upper seat brick. |
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5 Test methods
5.1 The preparation of the cast brick sample is carried out according to GB/T 7321, and the chemical analysis is taken within 10mm of the working face; The preparation of the sample of the prefabricated block shall be carried out synchronously according to GB/T 4513.2 during the production of the block.
5.2 Alumina is measured at GB/T 6900 or GB/T 21114.
5.3 Magnesium oxide and carbon are measured in GB/T 16555 or GB/T 21114.
5.4 The apparent porosity and bulk density of the machined products are measured according to GB/T 2997; The apparent porosity and bulk density of casting preformed products were measured according to GB/T 4513.6.
5.5 The compressive strength at room temperature shall be measured according to GB/T 5072.
5.6 The size and appearance shall be checked according to GB/T 10326.
5.7 Check the tilt of the end plane of the cast brick.
5.7.1 Measuring tools: Use height (depth) vernier calipers.
5.7.2 Place the cast brick on the plate and measure its maximum and minimum height. The difference between the two values is the tilt value of the end plane.
6 Quality assessment procedures
6.1 The cast brick shall be a batch of 1000 pieces; The bricks come in batches of 500.
6.2 Sampling and conformity determination rules
The sampling and acceptance were carried out according to GB/T 10325, and the acceptance inspection items were the normal temperature compressive strength, apparent porosity and bulk density of the brick, and the apparent porosity and bulk density of the cast brick.
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 Marking, packing, transportation, storage and quality certificate
7.1 Products are marked, packed, transported and stored in GB/T 16546.
7.2 When the products are issued, they must be accompanied by a quality certificate issued by the quality supervision department, indicating the name of the supplier, the name of the customer, the name of the product, the implementation standard, the date of production, the brand number, the batch number and the quality inspection results.
