YB/T 4439-2014加热炉用高铝质锚固砖/High alumina anchor bricks for heating furnace

加热炉用高铝质锚固砖

1范围

  本标准规定了加热炉用高铝质锚固砖的术语和定义、牌号、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。

  本标准适用于加热炉、梭式窑及循环流化床锅炉等工业窑炉用高铝质锚固砖。

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 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 7320耐火材料 热膨胀试验方法

  GB/T 7321定形耐火制品试样制备方法

  GB/T 8170数值修约规则与极限数值的表示和判定

  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 18930耐火材料术语

  GB/T 21114耐火材料 X射线荧光光谱化学分析 熔铸玻璃片法

  YB/T 370 耐火制品荷重软化温度试验方法(非示差-升温法)

3 术语和定义

  GB/T 10325、GB/T 18930 界定的以及下列术语和定义适用于本文件,

3.1

  高铝质锚固砖 high alumina anchor brick

  高铝质锚固砖是指具有特定形状在工业窑炉炉壳或支撑炉衬的钢结构上安装,并埋入耐火材料衬体中起锚固和连接作用的高铝质耐火砖。

3.2

  常温抗拉强度 cold tensile strength

  在室温下,具有一定尺寸的条形试样按规定条件加荷,在断裂前单位面积上所能承受的极限拉应力。

4 牌号及形状尺寸

4.1 牌号

  产品按其理化指标分为 LM-55、LM-65 和 LM-75 三个牌号;其中L,M分别是“铝”、“错”的汉语拼音首字母,其后的阿拉伯数字为三氧化二铝的质量百分数。4.2 产品的形状及尺寸,由供需双方协议确定。

4.2 产品的形状及尺寸,由供需双方协议确定。

5 技术要求

5.1 砖的理化指标应符合表1的规定。

表1砖的理化指标
项目		指 标
		LM-55	LM-65	LM-75
w(Al2O3)/%	μ0≥	55	65	75
	σ	1
w(CaO)/%	μ0≤	2.0	2.0	2.0
	σ	0.2
常温耐压强度/MPa	μ0≥	50	50	55
	σ	6
常温抗拉强度/MPa	μ0≥	4.0	3.8	4.2
	σ	0.2
0.2MPa荷重软化开始温度/℃	μ0≥	1450	1500	1520
	σ	10
显气孔率/%	μ0≤	22(24)	23(24)	21(23)
	σ	1.5
体积密度/(g/cm3)		2.30~2.50	2.45~2.70	2.60~2.95
加热永久线变化/% (1500℃x2h)	μ0	-0.4~+0.2	-0.3~+0.2	-0,3~+0.2
	σ	0.12
线膨胀率/%(1000℃)	提供实测数据
注1:体积密度为设计用砖重量的参考指标，不做考核。注2:括号内的数值是单重大于12kg砖的指标。

5.2 砖的尺寸允许偏差及外观应符合表 2的规定。

表2砖的尺寸允许偏差及外观 单位为毫米
项目			指 标
尺寸允许偏差	吊挂孔径		0~+2
	尺寸≤150		±2
	尺寸151~300		±3
	尺寸301~400		±4
	尺寸>400		±5
	厚度相对偏差	不大于	2
扭曲	长度≤300		1
	长度>300		2
缺角长度(a+b+c)			40
缺棱长度(e+f+g)			60
熔洞、空洞直径			6
裂纹长度	宽度≤0.10		砖的长度方向不限制 砖的宽度方向不允许有跨棱的裂纹
	宽度 0.11~0.25		≤40(不成网状)
	宽度>0.25		不准有

6 试验方法

6.1 砖的检验制样按 GB/T 7321 进行。

6.2 Al2O3,、CaO 的测定按 GB/T 6900 或 GB/T 21114 进行。

6.3显气(孔率、体积密度的测定按 GB/T 2997 进行。

6.4常温耐压强度的测定按 GB/T 5072 进行。

6.5加热永久线变化的测定按 GB/T 5988 进行。

6.6线膨胀率的测定按 GB/T 7320 进行。

6.7荷重软化开始温度的测定按 YB/T 370 进行。

6.8砖的尺寸、外观及断面的检查按 GB/T 10326 进行。

6.9 常温抗拉强度的测定按附录A进行。

7 质量评定程序

7.1 组批

  按同一牌号进行组批,每批不超过 50t.

7.2 抽样及合格判定规则

  砖的抽样、验收按 GB/T 10325 进行Al2O3含量、常温耐压强度、显气孔率、荷重软化开始温度为验收检验项目。

7.3 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。

8 包装、标志、运输、储存及质量证明书

8.1 砖的包装、标志、运输和储存按 GB/T 16546 进行。

8.2 砖发出时应附有供方质量监督部门签发的质量证明书,载明供方名称、需方名称、发货日期、产品名称、标准编号、牌号、批号及相应的理化指标等。

 

 

 

High alumina anchor bricks for heating furnace

1 Range

  This standard specifies the terms and definitions, grades, shapes and dimensions, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of high alumina anchor bricks for heating furnaces.

  This standard is applicable to high alumina anchoring bricks for industrial kilns such as heating furnaces, shuttle kilns and circulating fluidized bed boilers.

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 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 7320 refractory thermal expansion test method

  GB/T 7321 shaped refractory product sample preparation method

  GB/T 8170 numerical revision rules and limit value representation and judgment

  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 18930 refractory terminology

  GB/T 21114 refractories by X-ray fluorescence spectrochemical analysis of fused cast glass sheets

  Test method for Load softening temperature of YB/T 370 refractory products (non-differential warming method)

3 Terms and definitions

  As defined in GB/T 10325, GB/T 18930 and the following terms and definitions apply to this document,

3.1

  High alumina anchor brick

  High aluminum anchor brick refers to a high aluminum refractory brick with a specific shape installed on the steel structure of the furnace shell or supporting the furnace lining, and embedded in the refractory lining to play the role of anchoring and connecting.

3.2

  Cold tensile strength

  At room temperature, the ultimate tensile stress that a strip specimen of a certain size can bear on a unit area before fracture when loaded under specified conditions.

4 Grade and shape size

4.1 Brand

  Products according to its physical and chemical indicators are divided into LM-55, LM-65 and LM-75 three grades; Where L and M are the initial letters of Chinese pinyin for “aluminum” and “wrong” respectively, followed by Arabic numerals for the mass percentage of aluminum oxide. 4.2 The shape and size of the product shall be determined by agreement between the supply and demand parties.

4.2 The shape and size of the product shall be determined by agreement between the supply and demand parties.

5 Technical Requirements

5.1 The physical and chemical indexes of bricks shall comply with the provisions of Table 1.

Table 1 Physical and chemical indexes of bricks
Item		Index
		LM-55	LM-65	LM-75
w(Al2O3)/%	μ0≥	55	65	75
	σ	1
w(CaO)/%	μ0≤	2.0	2.0	2.0
	σ	0.2
Compressive strength at room temperature/MPa	μ0≥	50	50	55
	σ	6
Normal temperature tensile strength/MPa	μ0≥	4.0	3.8	4.2
	σ	0.2
0.2MPaLoad softening starting temperature/℃	μ0≥	1450	1500	1520
	σ	10
Apparent porosity/%	μ0≤	22(24)	23(24)	21(23)
	σ	1.5
Bulk density/(g/cm3)		2.30~2.50	2.45~2.70	2.60~2.95
Heating permanent line change/% (1500℃x2h)	μ0	-0.4~+0.2	-0.3~+0.2	-0,3~+0.2
	σ	0.12
Linear expansion rate/%(1000℃)	Provide measured data
Note 1: The volume density is the reference index of the weight of the brick used in the design, and it is not assessed. Note 2: Values in brackets are indicators that are greater than 12kg bricks alone.

5.2 The permissible size deviation and appearance of the brick shall comply with the provisions of Table 2.

Table 2. Permissible size deviation and appearance of bricks Unit in millimeter
Item			Index
Allowable deviation of dimension	Hanging aperture		0~+2
	Dimension≤150		±2
	Dimension151~300		±3
	Dimension301~400		±4
	Dimension>400		±5
Thickness relative deviation		Not more than	2
Contort	Length≤300		1
	Length>300		2
Missing Angle length(a+b+c)			40
Missing edge length(e+f+g)			60
Diameter of melting hole and cavity			6
Crack length	Breadth ≤0.10		The length direction of the brick is not limited No straddle cracks are allowed in the width direction of the brick
	Breadth 0.11~0.25		≤40(Not reticulated)
	Breadth >0.25		Be forbidden from

6 Test methods

6.1 Bricks shall be inspected and prepared according to GB/T 7321.

6.2 Determination of Al2O3, CaO according to GB/T 6900 or GB/T 21114.

6.3 Sensible gas (porosity and bulk density are measured according to GB/T 2997.

6.4 The compressive strength at room temperature shall be measured according to GB/T 5072.

6.5 The determination of permanent line change of heating was performed according to GB/T 5988.

6.6 The linear expansion rate was measured according to GB/T 7320.

6.7 The load softening starting temperature was determined according to YB/T 370.

6.8 The inspection of size, appearance and section of bricks shall be carried out according to GB/T 10326.

6.9 The tensile strength at room temperature was measured in accordance with Appendix A.

7 Quality assessment procedures

7.1 Batch

  Batch according to the same brand, each batch does not exceed 50t.

7.2 Rules for sampling and conformity determination

  The sampling and acceptance of bricks shall be carried out according to GB/T 10325. Al20, content, normal temperature compressive strength, apparent porosity, load softening starting temperature are the acceptance test items.

7.3 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.

8 Packing, marking, transportation, storage and quality certificate

8.1 Bricks are packed, marked, transported and stored in GB/T 16546.

8.2 When the bricks are issued, the quality certificate issued by the quality supervision department of the supplier shall be attached, indicating the name of the supplier, the name of the demander, the date of delivery, the name of the product, the standard number, the brand number, the batch number and the corresponding physical and chemical index.