YB∕T 4576-2016 大型球团回转窑用浇注料及预制砖/Castable and pre cast brick used for the large scale pellet rotary kiln
大型球团回转窑用浇注料及预制砖
1范围
本标准规定了大型球团回转窑用浇注料及预制砖的分类、技术要求、试验方法、质量评定程序、包装、标志、运输、储存和质量证明书。
本标准适用于年产 120万吨及以上的大型球团回转窑用浇注料及预制砖用浇注料。
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 3002耐火材料高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 7321定形耐火制品试样制备方法
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 2203 耐火浇注料荷重软化温度试验方法(非示差–升温法)
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分类
大型球团回转窑用浇注料及预制砖分为QHJ-60,QHJ-65,QHJ-70,QHJ-75,QHJ-80 五个牌号,其中,Q、H、J分别为球团、回转窑、浇注料的第一个字的汉语拼音首字母,后面数字表示化学成分中氧化铝的质量百分数。
4技术要求
大型球团回转窑用浇注料及预制砖的理化指标应符合表1的规定。
|
表1大型球团回转窑用浇注料及预制砖理化指标 |
|||||||
|
项目 |
指 标 |
||||||
|
QHJ-60 |
QHJ-65 |
QHJ-70 |
QHJ-75 |
QHJ-80 |
|||
|
化学成分(质量分数)/% |
Al2O3 |
≥ |
60 |
65 |
70 |
75 |
80 |
|
CaO |
≤ |
2 |
2 |
1.8 |
1.8 |
1.5 |
|
|
常温耐压强度/MPa |
110℃X24h烘干后 |
≥ |
60 |
60 |
60 |
60 |
70 |
|
1100℃X3h烧后 |
≥ |
70 |
70 |
75 |
– |
– |
|
|
1300℃X3h烧后 |
≥ |
75 |
75 |
80 |
80 |
90 |
|
|
常温抗折强度/MPa |
110℃X24h烘干后 |
≥ |
6 |
7 |
8 |
7 |
9 |
|
1100℃X3h 烧后 |
≥ |
7 |
9 |
10 |
– |
– |
|
|
1300℃X3h 烧后 |
≥ |
9 |
10 |
11 |
11 |
12 |
|
|
体积密度/g*cm–3 |
110℃X24h烘干后 |
≥ |
2.45 |
2.50 |
2.60 |
2.70 |
2.75 |
|
加热永久线变化/% |
1300℃X3h烧后 |
≥ |
-0.3~+0.3 |
-0.3~+0.3 |
-0.3~+0.3 |
-0.3~+0.3 |
-0.3~+0.3 |
|
0.2MPa 荷重软化温度/℃(0.6%) |
≥ |
1400 |
1450 |
1450 |
1450 |
1500 |
|
|
高温抗折强度/MPa(1250℃,0.5h) |
≥ |
– |
1.5 |
2.0 |
2.0 |
2.0 |
|
|
建议使用部位 |
回转窑内衬 |
锁口部位 |
|||||
5 试验方法
5.1 试样制备时,浇注料按 YB/T 5202.1 进行,预制砖按 GB/T 7321 进行。
5.2 化学分析按 GB/T 6900 进行。
5.3 常温耐压强度的测定按 GB/T 5072 进行,
5.4 常温抗折强度的测定按 GB/T 3001 进行,
5.5体积密度的测定按 YB/T 5200 进行。
5.6加热永久线变化的测定按 GB/T 5988 进行。
5.7 荷重软化温度的测定按 YB/T 2203 进行。
5.8 高温抗折强度的测定按 GB/T 3002 进行。
6 质量评定程序
6.1 组批
产品按同一牌号编批,每批重量不大于 100t。
6.2 抽样及合格判定规则
6.2.1 抽样按照 GB/T 17617 进行。
6.2.2 化学成分、体积密度、常温耐压强度、加热永久线变化和荷重软化温度为验收检验项目。检验结果如有不合格项目时,应按 6.2.1抽取双倍数量的试样对该项目进行复检,复检结果的平均值若符合表1 的规定,则判定该批产品为合格品,否则为不合格品，
6.2.3 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、储存和质量证明书
7.1 包装、标志、运输、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、发货日期、合同号、产品名称、标准编号、牌号、砖号、批号及相应的理化指标检验结果等项目。
Castable and pre cast brick used for the large scale pellet rotary kiln
1 Range
This standard specifies the classification, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of castable and prefabricated bricks for large-scale pelletizing rotary kilns.
This standard applies to castable for large pelletizing rotary kilns with an annual output of 1.2 million tons or more and castable for prefabricated bricks.
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 3002 refractories high temperature bending strength test method
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 7321 shaped refractory product sample preparation 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 softening temperature of YB/T 2203 refractory castables under load (non-differential warming method)
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 Categories
Castable and prefabricated bricks for large-scale pelletizing rotary kiln are divided into five grades QHJ-60,QHJ-65,QHJ-70,QHJ-75 and QHJ-80, in which Q, H and J are the initial letters of the first word of the pelletizing, rotary kiln and castable respectively, and the following numbers represent the mass percentage of alumina in the chemical composition.
4 Technical Requirements
The physical and chemical indexes of castable materials and prefabricated bricks for large-scale pelletizing rotary kilns shall conform to the provisions of Table 1.
|
Table 1. Physical and chemical indexes of castable materials and prefabricated bricks for large-scale pelletizing rotary kilns |
|||||||
|
Item |
Index |
||||||
|
QHJ-60 |
QHJ-65 |
QHJ-70 |
QHJ-75 |
QHJ-80 |
|||
|
Chemical composition (mass fraction)/% |
Al2O3 |
≥ |
60 |
65 |
70 |
75 |
80 |
|
CaO |
≤ |
2 |
2 |
1.8 |
1.8 |
1.5 |
|
|
Compressive strength at room temperature/MPa |
110℃X24h After drying |
≥ |
60 |
60 |
60 |
60 |
70 |
|
1100℃X3h After burning |
≥ |
70 |
70 |
75 |
– |
– |
|
|
1300℃X3h After burning |
≥ |
75 |
75 |
80 |
80 |
90 |
|
|
Flexural strength at room temperature/MPa |
110℃X24h After drying |
≥ |
6 |
7 |
8 |
7 |
9 |
|
1100℃X3h After burning |
≥ |
7 |
9 |
10 |
– |
– |
|
|
1300℃X3h After burning |
≥ |
9 |
10 |
11 |
11 |
12 |
|
|
Bulk density/g*cm–3 |
110℃X24h After drying |
≥ |
2.45 |
2.50 |
2.60 |
2.70 |
2.75 |
|
Heating permanent line change/% |
1300℃X3hAfter burning |
≥ |
-0.3~+0.3 |
-0.3~+0.3 |
-0.3~+0.3 |
-0.3~+0.3 |
-0.3~+0.3 |
|
0.2MPa load softening temperature/℃(0.6%) |
≥ |
1400 |
1450 |
1450 |
1450 |
1500 |
|
|
High temperature bending strength/MPa(1250℃,0.5h) |
≥ |
– |
1.5 |
2.0 |
2.0 |
2.0 |
|
|
Recommended parts |
Rotary kiln lining |
Clasp position |
|||||
5 Test methods
5.1 When preparing the sample, the castable is carried out according to YB/T 5202.1, and the prefabricated brick is carried out according to GB/T 7321.
5.2 Chemical analysis was performed in GB/T 6900.
5.3 The determination of compressive strength at room temperature shall be carried out according to GB/T 5072.
5.4 The bending strength at room temperature should be measured according to GB/T 3001.
5.5 Volumetric density was measured according to YB/T 5200.
5.6 The determination of permanent line change of heating was performed according to GB/T 5988.
5.7 The load softening temperature was determined according to YB/T 2203.
5.8 The bending strength at high temperature is measured according to GB/T 3002.
6 Quality assessment procedures
6.1 Batch Groups
Products according to the same grade batch, each batch weight is not more than 100t.
6.2 Sampling and conformity determination rules
6.2.1 Sampling is conducted according to GB/T 17617.
6.2.2 Chemical composition, bulk density, compressive strength at normal temperature, change of heating permanent line and softening temperature under load are the acceptance test items. If there are unqualified items in the inspection results, double the number of samples shall be taken according to 6.2.1 for reinspection of the items. If the average value of the reinspection results conforms to the provisions of Table 1, the batch of products will be judged as qualified products; otherwise, it will be unqualified products.
6.2.3 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 certification.
7 Packing, marking, transportation, storage and quality certificate
7.1 Packaging, marking, transportation and storage shall be carried out according to 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 delivery, the contract number, the product name, the standard number, the brand number, the brick number, the lot number and the corresponding physical and chemical index test results.
