黏土质和高铝质致密耐火浇注料

1范围

  本标准规定了黏土质和高铝质致密耐火浇注料的牌号、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。

  本标准适用于以黏土质和高铝质原料制成的致密耐火浇注料,主要用于工业窑炉等热工设备

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 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 7322耐火材料 耐火度试验方法

  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

  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 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牌号

  根据Al₂O₃:含量将黏土质和高铝质致密耐火浇注料分为NTJ-40、NTJ-45、GIJ-50、GJ-60、GIJ-65、GLJ-70、GLJ-80 七个牌号。牌号中NT,GL、J分别为黏土、高铝、浇的汉语拼音首字母,数字代表Al₂O₃质量百分数。

4技术要求

  黏土质和高铝质致密耐火浇注料的理化指标应符合表1的规定。

表1黏土质和高铝质致密耐火浇注料的理化指标
项目		指标
		NTJ-40	NTJ-45	GLJ-50	GLJ-60	GLJ-65	GLJ-70	GLJ-80
w(Al2O3)/%≥		40	45	50	60	65	70	80
耐火度/CN≥		164	170	170	172	172	172	178
体积密度/(g/cm3)≥	110℃X24h	2.05	2.10	2.15	2.30	2.40	2.45	2.65
常温抗折强度/MPa≥		4.0	4.0	4.0	5.0	6.0	6.0	7.0
常温耐压强度≥/MPa		25	25	25	30	35	35	40
加热永久线变化(试验温度X3h)/%		±0.8(1300℃)		±0.8(1350℃)	±0.8(1400℃)			±0.8(1500℃)

5试验方法

5.1试样的制备按YB/T 5202.1的规定进行。

5.2氧化铝的测定按GB/T 6900或GB/T 21114的规定进行。

5.3耐火度的测定按GB/T 7322的规定进行。

5.4体积密度的测定按YB/T 5200的规定进行。

5.5常温抗折强度的测定按GB/T 3001的规定进行。

5.6常温耐压强度的测定按GB/T 5072的规定进行。

5.7加热永久线变化的测定按GB/T 5988的规定进行。

6质量评定程序

6.1组批

  产品按同一牌号组批,每批不大于60t,原料变更时应另行组批。

6.2抽样及合格判定规则

6.2.1产品抽样按GB/T 17617进行。

6.2.2氧化铝含量、常温耐压强度、加热永久线变化为验收检验项目。

6.2.3检验结果的平均值均符合表1的规定时,为合格。如有不合格项目时,应6.2.1重新抽取试样对该项目进行复验。复验结果的平均值符合表1的规定,判定该批产品为合格,否则为不合格。

6.3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、储存及质量证明书

7.1包装、标志、运输、储存按 GB/T 15545的规定进行。

7.2产品发出时应附有质量证明书,载明供方名称、需方名称、生产日期、标准编号、产品名称、牌号、批号、理化指标及保存期等内容。

7.3产品发出时应附有产品使用说明书。

 

 

 

Clay and high alumina dense refractory castable

1 Range

  This standard specifies the grades, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage and quality certificates of clay and high alumina dense refractory castables.

  This standard applies to dense refractory castables made of clay and high alumina raw materials, which are mainly used in thermal equipment such as industrial kilns

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.

  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 7322 refractoriness test method

  GB/T 15545 amorphous refractory packaging, marking, transportation and storage

  GB/T 17617 Sampling of refractory raw materials and amorphous refractories

  GB/T 21114 Refractories X-ray fluorescence spectrochemical analysis – fusion-cast glass sheet 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

3Brand number

  According to Al₂O₃: content, clay and high aluminum dense refractory castable is divided into NTJ-40, NTJ-45, GIJ-50, GJ-60, GIJ-65, GLJ-70, GLJ-80 seven grades. In the grade, NT,GL and J are the initial letters of Chinese pinyin for clay, high aluminum and pouring respectively, and the numbers represent the mass percentage of Al₂O₃.

4 Technical Requirements

  The physical and chemical indexes of clay and high alumina dense refractory castables shall conform to the provisions of Table 1.

Table 1. Physical and chemical indexes of clay and high alumina dense refractory castables
Item		Index
		NTJ-40	NTJ-45	GLJ-50	GLJ-60	GLJ-65	GLJ-70	GLJ-80
w(Al2O3)/%≥		40	45	50	60	65	70	80
Refractoriness/CN≥		164	170	170	172	172	172	178
Bulk density/(g/cm3)≥	110℃X24h	2.05	2.10	2.15	2.30	2.40	2.45	2.65
Flexural strength at room temperature/MPa≥		4.0	4.0	4.0	5.0	6.0	6.0	7.0
Compressive strength at room temperature≥/MPa		25	25	25	30	35	35	40
Heating permanent line change (test temperatureX3h)/%		±0.8(1300℃)		±0.8(1350℃)	±0.8(1400℃)			±0.8(1500℃)

5 Test methods

5.1 The preparation of samples shall be carried out in accordance with the provisions of YB/T 5202.1.

5.2 Alumina is determined in accordance with GB/T 6900 or GB/T 21114.

5.3 Refractories shall be determined according to GB/T 7322.

5.4 Volumetric density shall be determined according to YB/T 5200.

5.5 The bending strength at room temperature shall be determined according to GB/T 3001.

5.6 The determination of compressive strength at room temperature shall be carried out according to the provisions of GB/T 5072.

5.7 Determination of permanent line change of heating shall be carried out according to GB/T 5988.

6 Quality assessment procedures

6.1 Batch Groups

  The products shall be batch according to the same brand, each batch shall not be greater than 60t, and another batch shall be formed when the raw materials are changed

6.2 Sampling and conformity determination rules

6.2.1 Product sampling is carried out according to GB/T 17617.

6.2.2 Changes in alumina content, compressive strength at room temperature and heating permanent line are acceptance inspection items.

6.2.3 If the average values of the test results all conform to the provisions of Table 1, they shall be considered qualified. If there is any unqualified item, the sample shall be taken again in 6.2.1 for retesting of the item. The average value of the reinspection results conforms to the provisions of Table 1, and the batch of products is judged to be qualified, otherwise it is unqualified.

6.3 Form of conformity assessment

  The conformity assessment can be carried out 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 Packing, marking, transportation and storage shall be carried out in accordance with the provisions of GB/T 15545.

7.2 The product shall be issued with a quality certificate, indicating the name of the supplier, the name of the demander, the production date, the standard number, the product name, the brand number, the batch number, the physical and chemical index and the storage period.

7.3 The product shall be shipped with the product instruction manual.