YB/T 4121-2018 中间包用碱性涂料/Alkaline coating for intermediate package
中间包用碱性涂料
1范围
本标准规定了中间包用碱性涂料的分类和牌号、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。
本标准适用于中间包用碱性涂抹料和喷涂料，
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 4513.2不定形耐火材料 第2部分:取样
GB/T 4513.5不定形耐火材料 第5部分:试样制备和预处理
GB/T 4513.6不定形耐火材料 第6部分:物理性能的测试
GB/T 5069镁铝系耐火材料化学分析方法
GB/T 15545不定形耐火材料包装、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
3分类和牌号
中间包用碱性涂料分为镁质(ZMT)和镁钙质(ZMGT)两类。其中Z、M、G、T分别为中、镁、钙、涂的汉语拼音首字母。
镁质涂料按氧化镁含量分为ZMT-1、ZMT-2和ZMT-3三种牌号。
镁钙质涂料按氧化钙含量分为ZMGT-1、ZMGT-2两种牌号。
4技术要求
中间包用碱性涂料的理化指标应符合表1的规定。
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表1中间包用碱性涂料的理化指标 |
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项目 |
指标 |
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|
ZMT-1 |
ZMT-2 |
ZMT-3 |
ZMGT-1 |
ZMGT-2 |
|
|
w(MgO)/% |
86 |
80 |
60 |
65 |
45 |
|
w(CaO)/%≥ |
– |
– |
– |
8 |
15 |
|
w(SiO₂)/%≤ |
5 |
– |
– |
– |
– |
|
体积密度/(g/cm3)(110℃X24h,烘干后) |
1.9~2.3 |
1.9~2.3 |
1.5~2.2 |
1.9~2.3 |
1.9~2.3 |
|
常温耐压强度(110℃X24h)/MPa≥ |
4 |
4 |
3 |
2 |
2 |
|
加热永久线变化(1500℃X3h)/% |
0~-3.5 |
0~-3.5 |
0~-4.0 |
0~-3.5 |
– |
5试验方法
5.1试样制备按GB/T 4513.5进行,但振动时间为30s~60s,实验室养护温度不低于20℃,养护时间不低于24h。
5.2化学成分的测定按GB/T 5069或GB/T 21114进行。
5.3体积密度、常温耐压强度和加热永久线变化的测定按 GB/T 4513.6进行。
6质量评定程序
6.1组批
按同一牌号进行编批,每批不超过120t。
6.2抽样
抽样按GB/T 4513.2进行。
6.3合格判定形式
可根据双方协议规定或者采用供货方声明、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包装、标志、运输和储存按GB/T 15545进行。
7.2产品发出时,应附有供方质量部门签发的质量证明书,载明供方名称、需方名称、生产日期、发货日期、合同号、产品名称、标准编号、牌号、批号及相应的理化指标检验结果等。
Alkaline coating for intermediate package
1 Range
This standard specifies the classification and grade, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of basic coatings for intermediate packets.
This standard applies to alkaline pastes and spray coatings for intermediate packets.
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 4513.2 Amorphous refractories – Part 2: Sampling
GB/T 4513.5 amorphous refractories – Part 5: Sample preparation and pretreatment
GB/T 4513.6 Amorphous refractories – Part 6: Testing of physical properties
GB/T 5069 method for chemical analysis of MG-Al refractories
GB/T 15545 amorphous refractory packaging, marking, transportation and storage
GB/T 21114 refractories by X-ray fluorescence spectrochemical analysis of fused cast glass sheets
3 Classification and brand
Basic coatings for intermediate packaging are divided into magnesium (ZMT) and magnesium calcium (ZMGT). Where 2, M, G and T are the initial letters of Chinese pinyin in medium, magnesium, calcium and painted respectively.
Magnesium coatings are divided into three grades according to the content of magnesium oxide: ZMT-1, ZMT-2 and ZMT-3.
Magnesium calcium coating according to the content of calcium oxide is divided into ZMGT-1, ZMGT-2 two grades.
4 Technical Requirements
The physical and chemical indexes of alkaline coatings used in tundish should conform to the provisions of Table 1.
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Table 1. Physical and chemical indexes of alkaline coatings for intermediate packaging |
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Item |
Index |
||||
|
ZMT-1 |
ZMT-2 |
ZMT-3 |
ZMGT-1 |
ZMGT-2 |
|
|
w(MgO)/% |
86 |
80 |
60 |
65 |
45 |
|
w(CaO)/%≥ |
– |
– |
– |
8 |
15 |
|
w(SiO₂)/%≤ |
5 |
– |
– |
– |
– |
|
Bulk density/(g/cm3)(110℃X24h,After drying) |
1.9~2.3 |
1.9~2.3 |
1.5~2.2 |
1.9~2.3 |
1.9~2.3 |
|
Compressive strength at room temperature(110℃X24h)/MPa≥ |
4 |
4 |
3 |
2 |
2 |
|
Heating permanent line change(1500℃X3h)/% |
0~-3.5 |
0~-3.5 |
0~-4.0 |
0~-3.5 |
– |
5 Test methods
5.1 The sample preparation shall be carried out according to GB/T 4513.5, but the vibration time shall be 30s-60s, the laboratory curing temperature shall not be less than 20℃, and the curing time shall not be less than 24h.
5.2 Chemical composition is determined in GB/T 5069 or GB/T 21114.
5.3 The measurement of bulk density, compressive strength at room temperature and permanent line change of heating was carried out according to GB/T 4513.6.
6 Quality assessment procedures
6.1 Batch Groups
Batch according to the same brand, each batch does not exceed 120t.
6.2 Sampling
Sampling was conducted according to GB/T 4513.2.
6.3 Form of conformity determination
It can be carried out in the form of the agreement between the two parties, the statement of the supplier, the certification of the user, or the third-party certification.
7 Packing, marking, transportation, storage and quality certificate
7.1 Packing, marking, transportation and storage shall be carried out in GB/T 15545.
7.2 When the products are issued, the quality certificate issued by the quality department of the supplier shall be attached, indicating the name of the supplier, the name of the demander, the date of production, the date of delivery, the contract number, the name of the product, the standard number, the brand number, the batch number and the corresponding physical and chemical index test results.
