YB/T 4109-2002 循环流化床锅炉用耐磨耐火浇注料/Abrasion resistant refractory castable

循环流化床锅炉用耐磨耐火浇注料

1范围

  本标准规定了循环流化床锅炉用耐磨耐火浇注料的定义、分类、技术要求、试验方法、检验规则、包装、标志、运输、储存及质量证明书。

  本标准适用于循环流化床锅炉内衬易冲刷磨损部位用的耐磨耐火浇注料,也适用于其他高温工业窑炉内衬冲刷磨损严重部位用的耐火浇注料。

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,鼓励根据木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 6900.4-1986 粘土、高铝质耐火材料化学分析方法 EDTA 容量法测定氧化铝量

  GB/T8076-1997混凝土外加剂

  GB/T 15545-1995不定形耐火材料包装、标志、运输和储存

  GB/T 17617-1998耐火原料和不定形耐火材料 取样

  GB/T 18301–2001耐火材料常温耐磨性试验方法

  YB/T 2206.2-1998耐火浇注料抗热震性试验方法(水急冷法)

  YB/T 5200-1993致密对火浇注料显气孔率和体积密度试验方法

  YB/T 5201-1993致密耐火浇注料常温抗折强度和耐压强度试验方法

  YB/T 5202-1993致密耐火浇注料稠度测定和试样制备方法

3术语和定义

  下列术语和定义适用于本标准。

  耐磨耐火浇注料 Abrasion resistant refractory castable

  在使用温度下能抵抗物料冲刷,耐磨损性能优良的可注施工的耐火材料。

4分类

  耐磨耐火浇注料按理化性能分为:NMJ-1、NMJ-2、NMJ-3三种牌号。N、M、J分别代表耐、磨、浇三个字汉语拼音的第一个字母。

5技术要求

5.1耐磨耐火浇注料的理化指标应符合表1的规定。

5.2化学成分、体积密度、抗热震性及最高使用温度只提供数据,不作考核指标。

5.3耐磨浇注料初凝时间不小于45min,终凝时间不大于240min。

表1耐磨耐火注料的理化指标
项目	指标
	NMJ-1	NMJ-2	NMJ-3
Al2O3,%	60	65	70

体积密度,g/cm3	(110℃x24h干后)≥	2.40	2.60	2.80
常温耐压强度 MPa	(110℃x24h干后)≥	55	60	65
	(1000℃x3h烧后)≥	80	90	100
常温抗折强度 MPa	(110℃x24h干后)≥	7	8	9
	(1000℃x3h烧后)≥	9	11	13
烧后线变化,%	(1000℃x3h)	-0.3~+0.3	-0.3~+0.3	-0.3~+0.3
常温磨损量,cm3	(1000℃x3h烧后)≤	9	8	7
抗热震性,次	(1000℃,水冷)≥	20	20	20
最高使用温度,℃		1400	1450	1500
注:最高使用温度指材料在该温度下煅烧5h后线收缩率不大于1.5%的温度。

5.4耐磨耐火浇注料一般以散状混合料交货,亦可按需方要求以预制品交货。

5.5如有特殊需要,其技术要求由供需双方协商确定。

6试验方法

6.1制样按YB/T 5202进行。

6.2Al₂O₃,的分析按GB/T 6900.4进行。

6.3体积密度的检验按YB/T 5200进行,

6.4抗折强度和耐压强度的检验按YB/T 5201进行。

6.5常温磨损量的检验按GB/T 18301进行。

6.6抗热震性的检验按YB/T 2206.2进行,但试验温度为1000℃。

6.7初凝时间及终凝时间的测定按GB 8076进行。

7检验规则

7.1耐磨耐火浇注料的抽样应符合GB/T 17617的规定,每批不大于60t。

7.2检验结果如有一项不符合标准要求时,该不合格项目应取双倍试样进行复验。复验结果仍不合格,则整批判定为不合格品。

8包装、标志、运输、储存及质量证明书

8.1包装、标志、运输及储存应符合GB/T 15545的规定,保存期不大于3个月。

8.2可将粉剂用塑料袋单独包装扎牢放入大袋中。

8.3产品发出时必须附有质量证明书,载明供方名称、需方名称、生产日期、合同号、标准编号、产品名称、牌号、批号及理化指标等。

 

 

 

Abrasion resistant refractory castable

1 Range

  This standard specifies the definition, classification, technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and quality certificate of wear-resistant castables for circulating fluidized bed boilers.

  This standard is applicable to the wear-resistant refractory castables used in the lining of circulating fluidized bed boiler which are easy to be washed and worn, and also to the refractory castables used in the lining of other high temperature industrial furnaces which are severely washed and worn.

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 the Wood Standard are encouraged to study the use of the most recent version of these documents. For undated references, the latest version of the document applies to this standard.

  Methods for chemical analysis of clay and high alumina refractories — the EDTA volumetric method for the determination of alumina content concrete admixtures

  GB/T 15545-1995 Amorphous refractory packaging, marking, transport and storage

  GB/T 17617-1998 Sampling of refractory raw materials and amorphous refractory materials

  GB/T 18301-2001 Test method for wear resistance of refractory materials at normal temperature

  YB/T 2206.2-1998 Test method for thermal shock resistance of refractory castables (water quench method)

  YB/T 5200-1993 Test method for apparent porosity and bulk density of dense flame castable

  YB/T 5201-1993 Test method for flexural strength and compressive strength of dense refractory castables at room temperature

  YB/T 5202-1993 Method for determination of consistency of dense refractory castables and preparation of samples

3 Terms and definitions

  The following terms and definitions apply to this standard.

  Abrasion resistant refractory castable

  Refractories that can resist material erosion at the temperature of use and have excellent wear resistance can be injected for construction.

4 Categories

  According to physical and chemical properties, wear-resistant refractory castables are divided into three grades :NMJ-1, NMJ-2 and NMJ-3. N, M and J represent the first letter of the three characters in Chinese pinyin respectively.

5 Technical Requirements

5.1 The physical and chemical indexes of wear-resistant refractory castables shall conform to the provisions of Table 1.

5.2 Chemical composition, bulk density, thermal shock resistance and maximum operating temperature are provided only as data, not as assessment indicators.

5.3 The initial setting time of wear-resistant castable shall not be less than 45min, and the final setting time shall not be more than 240min.

Table 1. Physical and chemical indexes of wear-resistant and fire-resistant injection
Item	Index
	NMJ-1	NMJ-2	NMJ-3
Al2O3,%	60	65	70

Bulk density,g/cm3	(110℃x24hAfter drying)≥	2.40	2.60	2.80
Compressive strength at room temperature/ MPa	(110℃x24hAfter drying)≥	55	60	65
	(1000℃x3hAfter burning)≥	80	90	100
Flexural strength at room temperatureMPa	(110℃x24hAfter drying)≥	7	8	9
	(1000℃x3hAfter burning)≥	9	11	13
Changes in line after burning,%	(1000℃x3h)	-0.3~+0.3	-0.3~+0.3	-0.3~+0.3
Normal temperature wear,cm3	(1000℃x3hAfter burning)≤	9	8	7
Thermal shock resistance, time	(1000℃,water-cooling)≥	20	20	20
Maximum service temperature,℃		1400	1450	1500
Note: The maximum use temperature refers to the temperature at which the line shrinkage of the material is not more than 1.5% after 5h of calcination at this temperature.

5.4 Wear-resistant castables are generally delivered in bulk mixture, or in prefabricated products as required by the demander.

5.5 If there is any special need, the technical requirements shall be determined by the supply and demand parties through negotiation.

6 Test methods

6.1 Sample preparation is carried out according to YB/T 5202.

6.2Al₂O₃, analysis was carried out according to GB/T 6900.4.

6.3 The bulk density test shall be carried out according to YB/T 5200.

6.4 The bending strength and compressive strength shall be tested according to YB/T 5201.

6.5 Wear at room temperature shall be tested according to GB/T 18301.

6.6 Thermal shock resistance is tested according to YB/T 2206.2, but the test temperature is 1000℃.

6.7 The initial setting time and final setting time were determined according to GB 8076.

7 Inspection Rules

7.1 The sampling of wear-resistant refractory castables shall comply with the provisions of GB/T 17617, and each batch shall not exceed 60t.

7.2 If one of the test results does not meet the requirements of the standard, the unqualified item shall take double samples for reinspection. If the reinspection result is still unqualified, the whole product shall be judged as unqualified.

8 Packing, marking, transportation, storage and quality certificate

8.1 Packaging, marking, transportation and storage shall comply with the provisions of GB/T 15545, and the storage period shall not be more than 3 months.

8.2 The powder can be wrapped separately in a plastic bag and bundled tightly into a large bag.

8.3 When the product is issued, it must be accompanied by a quality certificate, indicating the name of the supplier, the name of the demander, the date of production, the contract number, the standard number, the name of the product, the brand number, the batch number and the physical and chemical index.