GB/T 26564-2011 镁铝尖晶石/Magnesium aluminate spinel
镁铝尖晶石
1 范围
本标准规定了镁铝尖品石的术语和定义、分类,技术要求、试验方法、验收规则、包装、标志、运输、贮存和质量证明书。本标准适用于以工业氧化铝或铝矾土、轻烧氧化镁为原料,采用烧结法和电熔法生产的镁铝尖晶石。
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,仅注目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 2999 耐火材料 颗粒体积密度试验方法
GB/T 5069 镁铝系耐火材料化学分析方法
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 5142 冶金矿产品包装、标志、运输、贮存和质量证明书
3 术语和定义
下列术语和定义适用于本文件。
3.1
镁铝尖晶石 magnesium aluminate spinel
化学式为 MgAL2O4或 MgO·AL2O3:的一种尖晶石。
3.2
烧结镁铝尖晶石isintered magnesium aluminate spinel
采用烧结工艺合成的镁铝尖品石。
3.3
电熔镁铝尖晶石 fused magnesium aluminate spinel
采用电熔工艺合成的镁铝尖晶石。
3.4
富镁尖晶石magnesia-rich spinel
化学组成中 MgO/AL2O3摩尔比大于1的镁铝尖品石。
3.5
富铝尖晶石 alumina-rich spinel
化学组成中MgO/AL2O3摩尔比小于1的镁铝尖晶石。
4 分类与牌号
4.1 分类
4.1.1 按生产工艺分为烧结和电熔两种
4.1.2 按氧化铝原料分为工业氧化铝和铝矾土两类。
4.1.3 按氧化铝标称含量分为 50、56、60、66、70、76、90、50-P、66-P、76-P等 10 种
4.2 牌号
镁铝尖晶石牌号由字母和数字构成,见表1。
“S”取自烧结的英文“sintered”字首,“F”取自电熔的英文“fused”字首表示工艺;“M”取自氧化镁的英文“magnesia”字首表示原料;
“A”取自氧化铝的英文“alumina”字首,“B”取自铝矾土的英文“bauxite”字首表示原料;
用阿拉伯数字表示氧化铝标称含量的质量分数,如数字后加“P”表示P级,取自英文“pure”字首。
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表1镁铝尖晶石的牌号命名 |
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位序 |
第1位 |
第2位 |
第3位 |
第4位 |
第5位 |
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含义 |
生产工艺 |
原料 |
选用原料 |
主成分氧化铝的质量百分数 |
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|
符号 |
S |
F |
M |
A |
B |
50 |
56 |
60 |
66 |
70 |
76 |
90 |
|
|
意义 |
烧结 |
电熔 |
氧化镁 |
氧化铝 |
铝土矿 |
表示主成分氧化铝的标称值,后面加P表示P级。 |
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举例说明 |
例1:SMA76烧结工艺,使用工业氧化铝为原料,标称氧化铝含量76%的镁铝尖晶石。 例3:FMA70一电熔工艺,使用工业氧化铝为原料,标称氧化铝含量70%的镁铝尖晶石。例4:SMB65一烧结工艺,使用矾土为原料,标称氧化铝含量65%的镁铝尖晶石 |
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5技术要求
镁铝尖晶石产品的理化指标应符合表2、表3的规定。
6 试验方法
6.1 化学成分的测定按 GB/T 5069 或 GB/T 21114 的规定进行
6.2 体积密度、吸水率的测定按 GB/T 2999 的规定进行。
7 验收规则
7.1 组批
镁铝尖晶石按批检验,每批由同一牌号产品组成。每一批为一检验单位,每批量不超过 60t,或供需双方协商确定。
7.2 抽样和制样
7.2.1 抽样
镁铝尖晶石的抽样按 GB/T 17617 的规定进行
7.2.2 制样
抽取的试样应预先破碎成小于 10 mm 的颗粒后再缩分。制备的综合试样重量应不少于 10 kg。进行理化指标测定用的样品量不少于 2.5 kg.
7.3 判定与复验
7.3.1 判定
检验结果应按表2、表3的要求进行判定
7.3.2 复验
7.3.2.1 镁铝尖品石理化指标检验结果中,如有一项指标不符合要求时,应在同批产品中重新抽取双倍数量的试样对不合格项目进行复验,并以复验结果作为该批产品的最终检验结果。7.3.2.2 验收应在货到之日起 30 天内完成。
8 包装、标志、运输、贮存和质量证明书
8.1 镁铝尖品石的包装、标志、运输、贮存及质量证明书按 YB/T 5142 的规定进行
8.2镁铝尖晶石的运输工具须清洁,并有防雨、防雪设施。运输过程中严防受潮湿和污染.
8.3镁铝尖品石应贮存在不受潮湿的库房内。
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表2烧结镁铝尖晶石产品理化指标 |
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产品牌号 |
w(Al2O3,) |
w(MgO) |
w(CaO)%≤ |
w(SiO2 |
w(Na2O |
w(Fe2 O3≤ |
体积密度 g/cm3≥ |
吸水率%≤ |
|
|
氧化铝级 |
SMA50 |
48 |
46~50 |
0.65 |
0.35 |
0.15 |
0.36 |
3.20 |
0.8 |
|
SMA66 |
64 |
30~34 |
0.50 |
0.25 |
0.20 |
0.28 |
3.20 |
0.8 |
|
|
SMA76 |
74 |
21~24 |
0.45 |
0.20 |
0.30 |
0.20 |
3.25 |
1.0 |
|
|
SMA90 |
89 |
7~10 |
0.40 |
0.15 |
0.35 |
0.17 |
3.30 |
1.0 |
|
|
SMA50-P |
48 |
48~51 |
0.50 |
0.15 |
0.10 |
0.05 |
3.23 |
0.8 |
|
|
SMA66-P |
64 |
32~35 |
0.35 |
0.12 |
0.15 |
0.05 |
3.23 |
0.8 |
|
|
SMA76-P |
74 |
23~25 |
0.30 |
0.12 |
0.20 |
0.05 |
3.30 |
0.8 |
|
|
铝矾土级 |
SMB56 |
54 |
31~36 |
1.50 |
3.50 |
– |
2.00 |
3.15 |
– |
|
SMB60 |
58 |
28~32 |
1.50 |
3.50 |
– |
1.80 |
3.15 |
– |
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表 3电熔镁铝尖晶石产品理化指标 |
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产品牌号 |
w(Al2O3,) |
w(MgO) |
w(CaO)%≤ |
w(SiO2 |
w(Na2O |
体积密度 g/cm3≥ |
|
|
氧化铝级 |
FMA50 |
48 |
46~50 |
0.70 |
0.55 |
0.50 |
3.30 |
|
FMA66 |
64 |
30~34 |
0.65 |
0.50 |
0.35 |
3.30 |
|
|
FMA70 |
70 |
24~27 |
0.55 |
0.35 |
0.30 |
3.30 |
|
|
FMA90 |
89 |
7~10 |
0.30 |
0.23 |
0.25 |
3.30 |
|
|
铝矾土级 |
FMB66 |
64 |
30~34 |
0.8 |
1.0 |
0.2 |
3.40 |
|
FMB70 |
70 |
23~27 |
0.8 |
1.0 |
0.2 |
3.40 |
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Magnesium aluminum spinel
1 Range
This standard specifies the terms and definitions, classification, technical requirements, test methods, acceptance rules, packaging, marking, transportation, storage and quality certificates of magnesia and aluminum apinite. This standard is applicable to the production of magnesia and alumina spinel by sintering and electromelting using industrial alumina or bauxite and light burnt magnesia as raw materials.
2 Normative reference documents
The following documents are essential for the application of this document. For dated references, only the notable edition applies to this document. For undated references, the latest version (including all amendment orders) applies to this document.
GB/T 2999 refractory particle bulk density test method
GB/T 5069 method for chemical analysis of MG-Al refractories
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
YB/T 5142 Certificate of packaging, marking, transportation, storage and Quality of metallurgical mineral products
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Magnesium aluminate spinel
A spinel with the formula MgAL2O4 or MgO·AL2O3:.
3.2
Isintered magnesium aluminate spinel
Mg-al cuspite synthesized by sintering process.
3.3
Fused magnesium aluminate spinel
Mg-al spinel synthesized by electromelting process.
3.4
Magnesia-rich spinel. Magnesia-rich spinel
MgO/AL2O3 molar ratio in chemical composition is greater than 1.
3.5
Alumina-rich spinel
MgO/AL2O3 molar ratio of MGO/al2o3 in chemical composition is less than 1.
4 Classification and grade
4.1 Classification
4.1.1 According to the production process, it can be divided into sintering and electric melting
4.1.2 According to alumina raw materials, it is divided into industrial alumina and bauxite.
4.1.3 According to the nominal content of alumina, it is divided into 50, 56, 60, 66, 70, 76, 90, 50-P, 66-P, 76-P and other 10 kinds
4.2 Brand
The magnesia alumina spinel grade consists of letters and numbers, as shown in Table 1.
The “S” comes from the English “sintered” prefix, and the “F” comes from the English “fused” prefix of electric melting to indicate the process; “M” is derived from the English word “magnesia” of magnesium oxide to indicate the raw material;
“A” from the English alumina” alumina” word, “B” from the English bauxite “bauxite” word indicates raw materials;
The quality fraction of the nominal content of alumina is expressed in Arabic numbers, such as the number followed by “P” to indicate P grade, taken from the English” pure “prefix.
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Table 1 Names of magnesia-aluminum spinel |
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Order of bits |
1st place |
2nd place |
3rd place |
Fourth |
5th place |
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Implication |
Production technology |
Ingredients |
Selection of raw materials |
Mass percentage of principal component alumina |
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Symbol |
S |
F |
M |
A |
B |
50 |
56 |
60 |
66 |
70 |
76 |
90 |
|
|
Significance |
Sintering |
Electric fusion |
Magnesium oxide |
Aluminium oxide |
Bauxite |
Represents the nominal value of the principal component alumina, followed by P to indicate P grade。 |
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Illustrate by example |
Example 1:SMA76 sintering process, the use of industrial alumina as raw material, nominal alumina content of 76% magnesia-aluminum spinel. Example 2:SMA76-P sintering process, the use of industrial alumina as raw material,P grade nominal alumina content of 76% MG-Al spinel. Example 3:FMA70 electromelting process, the use of industrial alumina as raw material, nominal alumina content of 70% MG-Al spinel. Example 4:SMB65 – sintering process, using bauxite as raw material, nominal alumina content of 65% magnesia-aluminum spinel |
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5 Technical Requirements
The physical and chemical indexes of MG-Al spinel products shall comply with the provisions of Table 2 and Table 3.
6 Test methods
6.1 Chemical composition shall be determined in accordance with GB/T 5069 or GB/T 21114
6.2 The measurement of bulk density and water absorption shall be carried out according to the provisions of GB/T 2999.
7 Acceptance Rules
7.1 Batch
Magnesium aluminum spinel according to batch inspection, each batch is composed of the same brand product. Each batch is an inspection unit, each batch does not exceed 60t, or the supply and demand parties to determine through negotiation.
7.2 Sampling and sample preparation
7.2.1 Sampling
Sampling of MG-Al spinel is carried out according to GB/T 17617
7.2.2 Sample preparation
The sampled sample should be pre-broken into particles less than 10 mm and then shrunk. The synthesized sample should weigh no less than 10 kg. The sample size for physicochemical index determination should be not less than 2.5kg.
7.3 Judgment and retest
7.3.1 Decision
The test results shall be judged according to the requirements in Table 2 and Table 3
7.3.2 Retest
7.3.2.1 In the physical and chemical index test results of MG-Al spinite, if any index does not meet the requirements, double the number of samples shall be taken from the same batch of products to re-test the unqualified items, and the re-test result shall be used as the final test result of the batch of products. 7.3.2.2 Acceptance shall be completed within 30 days from the date of arrival of the goods.
8 Packing, marking, transportation, storage and quality certificate
8.1 The packing, marking, transportation, storage and quality certificate of magnesia alumina are carried out in accordance with the provisions of YB/T 5142
8.2 The means of transportation of magnesia-aluminum spinel shall be clean and equipped with rain and snow protection facilities. Prevent moisture and contamination during transportation.
8.3 Magnesium-aluminum pinnacles should be stored in a warehouse that is not subject to moisture.
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Table 2 Physical and chemical indexes of sintered MG-Al spinel products |
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Product brand |
w(Al2O3,) |
w(MgO) |
w(CaO)%≤ |
w(SiO2 |
w(Na2O |
w(Fe2 O3≤ |
体积密度 g/cm3≥ |
吸水率%≤ |
|
|
Alumina grade |
SMA50 |
48 |
46~50 |
0.65 |
0.35 |
0.15 |
0.36 |
3.20 |
0.8 |
|
SMA66 |
64 |
30~34 |
0.50 |
0.25 |
0.20 |
0.28 |
3.20 |
0.8 |
|
|
SMA76 |
74 |
21~24 |
0.45 |
0.20 |
0.30 |
0.20 |
3.25 |
1.0 |
|
|
SMA90 |
89 |
7~10 |
0.40 |
0.15 |
0.35 |
0.17 |
3.30 |
1.0 |
|
|
SMA50-P |
48 |
48~51 |
0.50 |
0.15 |
0.10 |
0.05 |
3.23 |
0.8 |
|
|
SMA66-P |
64 |
32~35 |
0.35 |
0.12 |
0.15 |
0.05 |
3.23 |
0.8 |
|
|
SMA76-P |
74 |
23~25 |
0.30 |
0.12 |
0.20 |
0.05 |
3.30 |
0.8 |
|
|
Bauxite grade |
SMB56 |
54 |
31~36 |
1.50 |
3.50 |
– |
2.00 |
3.15 |
– |
|
SMB60 |
58 |
28~32 |
1.50 |
3.50 |
– |
1.80 |
3.15 |
– |
|
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Table 3 Physical and chemical indexes of electromolten magnesium-aluminum spinel products |
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Product brand |
w(Al2O3,) |
w(MgO) |
w(CaO)%≤ |
w(SiO2 |
w(Na2O |
体积密度 g/cm3≥ |
|
|
Alumina grade |
FMA50 |
48 |
46~50 |
0.70 |
0.55 |
0.50 |
3.30 |
|
FMA66 |
64 |
30~34 |
0.65 |
0.50 |
0.35 |
3.30 |
|
|
FMA70 |
70 |
24~27 |
0.55 |
0.35 |
0.30 |
3.30 |
|
|
FMA90 |
89 |
7~10 |
0.30 |
0.23 |
0.25 |
3.30 |
|
|
Bauxite grade |
FMB66 |
64 |
30~34 |
0.8 |
1.0 |
0.2 |
3.40 |
|
FMB70 |
70 |
23~27 |
0.8 |
1.0 |
0.2 |
3.40 |
|
