YB/T 4110-2009铝镁耐火浇注料/Aluminum magnesium refractory castable
铝镁耐火浇注料
1范围
本标准规定了铝镁耐火浇注料的分类、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。
本标准适用于钢水包、中间包等冶炼设备用铝镁耐火浇注料。
2规范性引用文件
下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准,然而,鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。
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 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 5202.1–2003 不定形耐火材料试样制备方法 第1部分:耐火浇注料。
3分类
铝镁耐火浇注料按理化指标分为:AMC-70、AMC-80、AMC85、AMC 95 四个牌号。牌号中“A”“M”、”C”分别为”氧化铝””氧化镁””浇注料”的英文首字母,牌号后数字为氧化铝和氧化镁合量的质量百分数。
4技术要求
铝镁耐火浇注料的理化指标应符合表1的规定。
|
表1铝镁耐火浇注料理化指标 |
|||||
|
项目 |
指 标 |
||||
|
AMC-70 |
AMC-80 |
AMC-85 |
AMC-95 |
||
|
w(Al2O3+MgO),%≥ |
70 |
80 |
85 |
95 |
|
|
体积密度(110℃x24h 干后)，g/cm3≥ |
2.60 |
2.80 |
2.85 |
2.95 |
|
|
常温耐压强度，MPa |
110℃x24h烘干后≥ |
20 |
|||
|
1000℃x3h烧后≥ |
30 |
||||
|
试验温度x3h烧后≥ |
50(1500℃) |
50(1550℃) |
60(1550℃) |
60(1600℃) |
|
|
加热永久线变化 |
(试验温度x3h)，% |
-0.5~+1.5(1500℃) |
-0.5~+1.8(1550℃) |
-0.2~+1.8(1550℃) |
0~+1.0(1600℃) |
5试验方法
5.1试样制备按 YB/T 5202.1 的规定进行。
5.2Al2O3和MgO含量的测定按 GB/T 5069 进行。
5.3 体积密度的检验按 YB/T 5200 进行。
5.4耐压强度的检验按 GB/T 5072 进行。
5.5加热永久线变化率的检验按 GB/T5988 进行。
6质量评定程序
6.1组
同一牌号的产品编为-批,每批不超过 60t。
6.2抽样及合格判定规则
6.21产品的抽样按 GB/T 17617 进行6.2.2体积密度、加热永久线变化和常温耐压强度(试验温度X3h 烧后)为验收检验项目。检验结果均符合表 1的要求时,该批产品为合格。
检验结果中有不合格项时,按 6.2.1重新抽取双倍数量的试样对该项目进行复验。复验结果的平均值符合表 1要求，且单值允许偏差符合表 2 的规定，则判定该批产品合格;否则,判为不合格批。
|
表2复验时单值允许偏差 |
||
|
项目 |
允许偏差 |
举 例 |
|
体积密度 |
-0.05g/cm |
AMC-70牌号，体积密度≥2.60g/c㎡，允许其中的一个单值不小于2.55g/cm |
|
常温耐压强度 |
-10% |
AMC-70牌号，1500℃烧后常温耐压强度≥50MPa，允许其中一个单值不小于 45MPa |
|
加热永久线变化 |
±20% |
AMC-70牌号,线变化-0.5%~+1.5%，允许其中一个单值不超过+1.8%或不低于-0.6% |
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、储存按 GB/T 15545 进行。
7.2产品发出时，应附有产品使用说明书和技术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、标准编号、牌号、批号、理化指标检验结果、生产日期和发货日期等内容。
Aluminum magnesium refractory castable
1 Range
This standard specifies the classification, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of aluminum-magnesium refractory castables.
This standard is applicable to aluminum magnesium refractory castables for smelting equipment such as ladle and tundish.
2 Normative reference documents
The terms in the following documents become terms of this Standard by reference to this Standard. All subsequent amendments (excluding errata) or revisions to dated citations are not applicable to this Standard; however, parties to an agreement under this Standard are encouraged to explore the use of the most recent version of these documents. For undated references, the latest version of the document applies to this standard.
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 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 5202.1–2003 Method for preparing samples of amorphous refractories — Part 1: Refractory castables.
3 Categories
Aluminum magnesium refractory castable is divided into four grades according to physical and chemical indexes :AMC-70, AMC-80, AMC85, AMC 95. In the grade, “A”, “M” and “C “are the English initials of” alumina “, “magnesium oxide” and “castable” respectively, and the number after the grade is the mass percentage of the combined amount of alumina and magnesium oxide.
4 Technical Requirements
The physical and chemical indexes of aluminum-magnesium refractory castable shall conform to the provisions of Table 1.
|
Table 1 Aluminum magnesium refractory casting cooking index |
|||||
|
Item |
Index |
||||
|
AMC-70 |
AMC-80 |
AMC-85 |
AMC-95 |
||
|
w(Al2O3+MgO),%≥ |
70 |
80 |
85 |
95 |
|
|
Bulk density (110℃x24h after drying)，g/cm3≥ |
2.60 |
2.80 |
2.85 |
2.95 |
|
|
Compressive strength at room temperature，MPa |
110℃x24h after drying≥ |
20 |
|||
|
After 1000℃x3h≥ |
30 |
||||
|
Test temperature x3h after burning≥ |
50(1500℃) |
50(1550℃) |
60(1550℃) |
60(1600℃) |
|
|
Heating permanent line change |
(test temperature x3h),% |
-0.5~+1.5(1500℃) |
-0.5~+1.8(1550℃) |
-0.2~+1.8(1550℃) |
0~+1.0(1600℃) |
5 Test methods
5.1 Sample preparation shall be carried out according to YB/T 5202.1.
5.2 The content of Al2O3 and MgO was determined according to GB/T 5069.
5.3 The test of bulk density shall be carried out according to YB/T 5200.
5.4 The compressive strength shall be tested according to GB/T 5072.
5.5 The test of the change rate of the heating permanent line shall be carried out according to GB/T5988.
6 Quality assessment procedures
6.1 Groups
Products of the same brand are classified as -batches, each batch not exceeding 60t.
6.2 Sampling and conformity determination rules
6.2.1 The sampling of the products shall be carried out according to GB/T 17617. 6.2.2 Bulk density, permanent line change of heating and compressive strength at normal temperature (test temperature X3h after firing) shall be the acceptance inspection items. When the inspection results meet the requirements of Table 1, the batch of products is qualified.
If there are any unqualified items in the test results, double the number of samples shall be taken again in accordance with 6.2.1. The average value of the retest results meets the requirements of Table 1, and the allowable deviation of a single value meets the provisions of Table 2, then the batch of products is judged to be qualified; Otherwise, it is awarded as unqualified batch.
|
Table 2 Allowable deviation of single value during retest |
||
|
Item |
Allowable deviation |
Take an example |
|
Bulk density |
-0.05g/cm |
AMC-70 grade, volume density ≥2.60g/c㎡, allowing a single value of not less than 2.55g/cm |
|
Compressive strength at room temperature |
-10% |
AMC-70 grade, 1500℃ after the normal temperature pressure strength ≥50MPa, allowing one of the single value is not less than 45MPa |
|
Heating permanent line change |
±20% |
AMC-70 grade, line variation -0.5%~+1.5%, allowing one of the single values not to exceed +1.8% or not less than -0.6% |
7 Packing, marking, transportation, storage and quality certificate
7.1 Packaging, marking, transportation and storage of products shall be carried out in accordance with GB/T 15545.
7.2 When the product is issued, it shall be accompanied by the product instruction manual and the quality certificate issued by the technical supervision department, indicating the name of the supplier, the name of the demander, the name of the product, the standard number, the brand number, the batch number, the test result of the physical and chemical index, the date of production and the date of delivery.
