JC/T 925-2003玻璃窑用烧结AZS砖/Sintered AZS bricks for glass kilns

玻璃窑用烧结AZS砖

1范围

  本标准规定了玻璃窑用烧结AZS砖的牌号、技术要求、试验方法、检验规则及标志、包装、运输储存和质量证明书。

  本标准适用于玻璃窑用烧结AZS砖。

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 2997-2000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 4984皓刚玉耐火材料化学分析方法

  GB/T 5072政密定形耐火制品常温耐压强度试验方法

  YB/T 3701995耐火制品荷重软化温度试验方法 (非示差一升温法)

  GB/T 7321-1987致密定形耐火制品试验的制样规定

  GB/T 10325-2001定形耐火制品抽样验收规则

  GB/T 10326–2001耐火制品尺寸、外观及断面的检查方法

  GB/T 16546-1996定形耐火制品包装、标志、运输和储在

  JC/T 639–1996玻璃窑用耐火材料气泡析出率试验方法

  JC/T 805-1987(1996)玻璃熔窑用耐火材料静态下抗玻璃液侵蚀试验方法

  JC/T 808-1987(1996)硅铝质耐火浇注料耐碱性试验方法

  YB/T 376.1-1995耐火制品抗热震性试验方法《水急冷法)

3分类

  产品按氧化错含量范围分为 AZS16、AZS20、AZS32 三个牌号

4技术要求

4.1产品的理化性能指标应符合表1的规定。

4.2产品的尺寸允许偏差与外观应符合表2的规定。

表1产品的理化指标
项目		指标
		AZS16	AZS20	AZS32
化学成分	ZrO2,%	≥16	≥20	≥32
	Fe2O3%	≤0.5	≤0.5	≤0.5
物理性能	体积密度，g/cm3	≥2.70	≥2.80	≤23.20
	显气孔率%	≤20	≤18	≤18
	耐压强度，MPa	≥70	≥80	≥80
	荷重软化温度，T0.6(℃)	≥1580	≥1620	≥1630
注1:特殊要求产品的理化指标如热震稳定性、气泡析出率、耐碱性、抗玻璃液侵蚀性能由供需双方商定。

表2产品的尺寸允许偏差及外观质量 单位:mm
项 目		指 标
尺寸允许偏差	<100	±1
	100~300	+1.-2
	301~400	+1.-2
扭曲		≤0.5%
缺角		30<a+b+c<75 允许三处
缺梭		30<e+f+g<60 允许三处;≤30 允许
熔洞表面直径		≤2.5
裂纹	<0.1	允许
	0.1~0.25	裂纹长度≤40
	>0.25	不允许
注2:特殊要求产品的尺寸允许偏差及外观质量要求由供需双方商定。

5试验方法

5.1制样按GB/T 7321的规定进行。

5.2化学成分按GB/T 4984的规定检验。

5.3体积密度、显气孔率按GB/T 2997的规定检验。

5.4耐压强度按GB/T 5072的规定检验。

5.5荷重软化温度按YB/T 370的规定检验。

5.6热震稳定性按YB/T 376.1的规定检验。

5.7气泡析出率按JC/T 639的规定检验。

5.8抗玻璃液侵蚀按JC/T 805的规定检验。

5.9耐碱性按 JC/T 808的规定检验。

5.10制品的尺寸偏差和外观质量按GB/T 10326的规定检验。

6检验规则

6.1砖以50吨为一批，不足50吨的按实际数量组批。

6.2抽样、验收按GB/T 10325进行，当样品为异型制品时，破坏性检验中的热震稳定性试验的样品应从同种材质的直形标准砖中选取。

6.3尺寸和外观的抽样方案按表3的规定进行。设样本量(n)中的不合格数为y，若y≤c，整批制品为合格批;若y>c，整批制品为不合格批。

表3抽样方案
批量(块数)，N	样本量，n	接收数.
51~90	5	1
91~150	8	1
151~280	13	2
281~500	20	3
501~1200	32	5
1201~3200	50	7
>3200	80	10

6.4破坏性检验的样品应从外观检查合格的样本中抽取，化学成分、体积密度、显气孔率、常温耐压强度、荷重软化开始温度为考核指标，其平均值指标应符合表1的规定。如第一次检验中有项目不合格，允许对该项目复检，复检时可在该批产品中随机抽取双倍数量的测试样本，进行不合格项目的复检，如果其平均值符合表1要求，判为合格批，否则判为不合格批。

7包装、标志、运输、储存和质量证明书

7.1标志、包装、运输和储存按GB/T 16546进行。

7.2砖出厂时附有质量证明书，质量证明书应包括:供方名称、需方名称、合同号、生产日期、产品名称、标准编号、牌号、批号、尺寸、外观及理化指标等内容。

Sintered AZS bricks for glass kilns

1 Range

  This standard specifies the grades, technical requirements, test methods, inspection rules and marks, packaging, transportation and storage and quality certificates of sintered AZS bricks for glass kilns.

This standard is applicable to sintered AZS bricks for glass kilns.

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 2997-2000 Test method for bulk density, apparent porosity and true porosity of dense shaped refractory products

  GB/T 4984 Hao corundum refractory chemical analysis method

  GB/T 5072 formized refractory products test method for compressive strength at room temperature

  YB/T 3701995 Test method for Load softening temperature of refractory products (non-differential rising temperature method)

  GB/T 7321-1987 Dense shaped refractory products test sample preparation requirements

  GB/T 10325-2001 Rules for sampling acceptance of shaped refractory products

  GB/T 10326–2001 Method for inspection of size, appearance and section of refractory products

  GB/T 16546-1996 Packaging, marking, transportation and storage of shaped refractory products

  JC/T 639–1996 Test method for bubble precipitation rate of refractory materials for glass kilns

  JC/T 805-1987(1996) Test method for resistance to liquid glass attack under static conditions of refractories used in glass melting kilns

  JC/T 808-1987(1996) Test method for alkali resistance of silica-alumina refractory castables

  YB/T 376.1-1995 Test method for thermal shock resistance of refractory products “Water quench cooling method”

3 Categories

  Products are divided into AZS16, AZS20, AZS32 three grades according to the oxidation error content range

4 Technical Requirements

4.1 The physical and chemical properties of the product shall comply with the provisions of Table 1.

4.2 The permissible size deviation and appearance of the product shall comply with the provisions of Table 2.

Table 1 Physical and chemical indexes of products
Item		Index
		AZS16	AZS20	AZS32
Chemical composition	ZrO2,%	≥16	≥20	≥32
	Fe2O3%	≤0.5	≤0.5	≤0.5
Physical property	Bulk density，g/cm3	≥2.70	≥2.80	≤23.20
	Apparent porosity%	≤20	≤18	≤18
	Compressive strength，MPa	≥70	≥80	≥80
	Softening temperature under load，T0.6(℃)	≥1580	≥1620	≥1630
Note 1: The physical and chemical indexes of products with special requirements, such as thermal shock stability, bubble precipitation rate, alkali resistance and glass liquid erosion resistance, shall be agreed by the supply and demand parties.

Table 2 The permissible deviation of product size and appearance quality unit :mm
Item		Index
Allowable deviation of dimension	<100	±1
	100~300	+1.-2
	301~400	+1.-2
Contort		≤0.5%
Missing corner		30<a+b+c<75 Three places allowed
Missing shuttle		30<e+f+g<60 Three places allowed;≤30 Permit
Weld hole surface diameter		≤2.5
Crack	<0.1	Permit
	0.1~0.25	Crack length≤40
	>0.25	Not allow
Note 2: The size permissible deviation and appearance quality requirements of special requirements products shall be agreed by both parties.

5 Test methods

5.1 Sample preparation shall be carried out according to GB/T 7321.

5.2 Chemical composition shall be tested according to GB/T 4984.

5.3 Bulk density and apparent porosity shall be tested according to GB/T 2997.

5.4 The compressive strength shall be tested according to GB/T 5072.

5.5 The load softening temperature shall be tested according to YB/T 370.

5.6 Thermal shock stability shall be tested according to YB/T 376.1.

5.7 The bubble precipitation rate shall be tested according to JC/T 639.

5.8 Resistance to liquid glass erosion shall be tested according to JC/T 805.

5.9 Alkaline resistance shall be tested according to JC/T 808.

5.10 The dimensional deviation and appearance quality of the product shall be inspected according to the provisions of GB/T 10326.

6 Inspection Rules

6.1 Bricks shall be made in batches of 50 tons, and those less than 50 tons shall be made in batches according to the actual quantity.

6.2 Sampling and acceptance shall be carried out according to GB/T 10325. When the sample is a deformed product, the sample of thermal shock stability test in destructive inspection shall be selected from the straight standard brick of the same material.

6.3 The sampling scheme for dimensions and appearance is carried out as specified in Table 3. Set the number of unqualified in sample size (n) as y, if y≤c, the whole batch of products is qualified; If y>c, the whole batch of products is unqualified.

Table 3 Sampling scheme
Batch (number of blocks),N	Sample size，n	Number of receptions.
51~90	5	1
91~150	8	1
151~280	13	2
281~500	20	3
501~1200	32	5
1201~3200	50	7
>3200	80	10

6.4 Samples for destructive inspection shall be selected from samples qualified for appearance inspection. Chemical composition, bulk density, apparent porosity, compressive strength at room temperature, and initial temperature of softening under load shall be the assessment indicators, and their average indicators shall comply with the provisions of Table 1. If there are unqualified items in the first inspection, it is allowed to re-inspect the item. During the re-inspection, double the number of test samples can be randomly selected from the batch of products to conduct the re-inspection of the unqualified items. If the average value meets the requirements of Table 1, it is awarded as the qualified batch; otherwise, it is awarded as the unqualified batch.

7 Packing, marking, transportation, storage and quality certificate

7.1 Marking, packing, transportation and storage shall be carried out in GB/T 16546.

7.2 Bricks are delivered with a quality certificate, which shall include supplier name, demander name, contract number, production date, product name, standard number, brand number, batch number, size, appearance, physical and chemical index, etc.