JCT498-2013 高强度耐火浇注料/high-strength refractory castable
高强度耐火浇注料
1范围
本标准规定了高强度耐火浇注料的术语和定义、分类和标记、技术要求、试验方法、检验规则以及标志、包装、运输、贮存和质量证明书等。
本标准适用于各种热工窑炉内衬的水硬性高强度耐火浇注料。
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 3001耐火材料 常温抗折强度试验方法
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 6900铝硅系耐火材料化学分析方法
GB/T 16555含碳、碳化硅、氮化物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 17617耐火原料和不定形耐火材料 取样
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
下列术语和定义适用于本文件。
3.1高强度耐火浇注料high-strength refractory castable
以刚玉、碳化硅等为骨料和粉料、铝酸盐水泥为结合剂，掺入添加剂配制而成，具有高强度的水硬性耐火浇注料。
4分类和标记
高强度耐火浇注料按Al2O3,和SiC合量的质量百分数分为GQ-92、GQ-85两类。其中GQ为高强汉语拼音首字母，其后的数字为Al2O3:和SiC合量的质量百分数。
4.2标记
按产品分类和标准号的顺序进行标记。
5技术要求
5.1理化性能指标应符合表1的规定。
|
表1理化性能指标 |
|||
|
项目 |
性能指标 |
||
|
GQ-92 |
GQ-85 |
||
|
(Al₂O3+SiC)/% ≥ |
92 |
85 |
|
|
CaO/% ≤ |
4 |
4 |
|
|
常温耐压强度/MPa ≥ |
110℃X24h烘干后 |
80 |
60 |
|
1100℃X3h烧后 |
100 |
70 |
|
|
1500℃X3h烧后 |
120 |
100 |
|
|
常温抗折强度/MPa≥ |
110℃X24h烘干后 |
8 |
6 |
|
1100℃X3h烧后 |
9 |
7 |
|
|
I500℃X3h烧后 |
10 |
9 |
|
|
加热永久线变化/% ≤ |
1 100℃X3h烧后 |
±0.5 |
±0.5 |
|
1500℃X3h烧后 |
±0.5 |
±0.5 |
|
|
体积密度/(g/cm3) ≥ |
110℃X24h烘干后 |
2.90 |
2.85 |
6试验方法
6.1试样制备
按YB/T 5202.1的规定进行。
6.2Al2O3的化学分析
按GB/T 6900的规定进行。
6.3SiC的化学分析
按GB/T 16555的规定进行。
6.4体积密度的测定
按YB/T 5200的规定进行。
6.5常温抗拆强度的测定
按GB/T 3001的规定进行。
6.6常温耐压强度的测定按GB/T 5072的规定进行。
6.7加热永久线变化的测定按GB/T 5988的规定进行。
7检验规则
7.1检验分类
检验按类型分为出厂检验和型式检验。
7.1.1出厂检验
出厂检验项目包括:化学成分、常温耐压强度和加热永久线变化。
7.1.2型式检验
型式检验包括表1的规定全部内容。在下列情况下进行型式检验:
a)生产工艺或原材料有较大改变时:
b)正常生产时，每年至少进行两次;
c)停产半年以上，恢复生产时:
d)出厂检验结果与上次型式检验结果有较大差异时。
7.2组批与抽样
7.2.1组批
7.2.2抽样
高强度耐火浇注料的抽样按GB/T 17617的规定进行。
7.3合格判定规则
检验结果符合表1的规定时，判定为合格。若仅有一项不合格时，应对副样进行不合格项的复检。
复检结果符合表1的规定时，判定为合格。检验结果多于一项不合格时，判定为不合格。
8标志、包装、运输、贮存和质量证明书
8.1标志、包装、运输和贮存
按GB/T 15545的规定进行。
8.2质量证明书
产品发出时应附有质量证明书及使用说明书，质量证明书应载明供方名称、产品名称、牌号、批号、生产日期、理化指标及执行标准和保存期等内容。
High strength refractory castable
1 Range
This standard specifies the terms and definitions, classification and marking, technical requirements, test methods, inspection rules, as well as marking, packaging, transportation, storage and quality certificates of high strength refractory castables.
This standard is applicable to hydraulic high strength refractory castables for the lining of various thermal kilns.
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 5072 refractories – normal temperature compressive strength test method
GB/T 5988 refractory heating permanent line change test method
GB/T 6900 aluminum-silicon refractory chemical analysis method
GB/T 16555 Method for chemical analysis of refractories containing carbon, silicon carbide and nitride
GB/T 15545 amorphous refractory packaging, marking, transportation and storage
GB/T 17617 Sampling of refractory raw materials and amorphous refractories
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
The following terms and definitions apply to this document.
3.1 high-strength refractory castable
Corundum, silicon carbide as aggregate, powder, aluminate cement as binder, with additives to prepare a high strength hydraulic refractory castable.
4 Categorize and label
High strength refractory castable is divided into GQ-92, GQ-85 two categories according to the mass percentage of Al2O3, and SiC. Where GQ is the first letter of high-strength Chinese pinyin, and the number after it is the mass percentage of Al2O3: and SiC.
4.2 Tags
Label in order of product classification and standard number.
5 Technical Requirements
5.1 Physical and chemical properties shall comply with the provisions of Table 1.
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Table 1 Physical and chemical properties |
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|
Item |
Performance index |
||
|
GQ-92 |
GQ-85 |
||
|
(Al₂O3+SiC)/% ≥ |
92 |
85 |
|
|
CaO/% ≤ |
4 |
4 |
|
|
Compressive strength at room temperature/MPa ≥ |
110℃X24hAfter drying |
80 |
60 |
|
1100℃X3hAfter burning |
100 |
70 |
|
|
1500℃X3hAfter burning |
120 |
100 |
|
|
Flexural strength at room temperature/MPa≥ |
110℃X24hAfter drying |
8 |
6 |
|
1100℃X3hAfter burning |
9 |
7 |
|
|
I500℃X3hAfter burning |
10 |
9 |
|
|
Heating permanent line change/% ≤ |
1 100℃X3hAfter burning |
±0.5 |
±0.5 |
|
1500℃X3hAfter burning |
±0.5 |
±0.5 |
|
|
Bulk density/(g/cm3) ≥ |
110℃X24hAfter drying |
2.90 |
2.85 |
6 Test methods
6.1 Sample Preparation
According to YB/T 5202.1.
6.2 Chemical analysis of Al2O3。
According to GB/T 6900.
6.3 Chemical analysis of SiC
According to GB/T 16555.
6.4 Measurement of bulk density
According to YB/T 5200.
6.5 Determination of disassembly strength at room temperature
According to GB/T 3001.
6.6 The determination of compressive strength at room temperature shall be carried out according to the provisions of GB/T 5072.
6.7 The determination of permanent line change of heating shall be carried out according to GB/T 5988.
7 Inspection Rules
7.1 Inspection Classification
The inspection is divided into factory inspection and type inspection according to the type.
7.1.1 Factory inspection
Factory inspection items include: chemical composition, normal temperature pressure strength and heating permanent line change.
7.1.2 Type inspection
The type inspection includes all the contents specified in Table 1. Type inspection is performed in the following cases:
a) When there are major changes in the production process or raw materials:
b) During normal production, at least twice a year;
c) Stop production for more than half a year and resume production:
d) When there is a big difference between the factory inspection result and the last type inspection result.
7.2 Batch and sampling
7.2.1 Batch Group
7.2.2 Sampling
Sampling of high strength refractory castables is carried out according to GB/T 17617.
7.3 Qualification Rules
If the inspection results conform to the provisions of Table 1, it shall be judged as qualified. If there is only one non-conformity, the sub-sample shall be reinspected for non-conformity.
When the reinspection results meet the requirements of Table 1, it is judged to be qualified. If there is more than one unqualified inspection result, it will be judged as unqualified.
8 Marking, packing, transportation, storage and quality certificate
8.1 Marking, packaging, transportation and storage
According to GB/T 15545.
8.2 Certificate of Quality
When the product is issued, it shall be accompanied by a quality certificate and an instruction manual. The quality certificate shall indicate the supplier’s name, product name, brand number, batch number, production date, physical and chemical index, implementation standard and storage period.
