GB/T 30870-2014 English PDF (GBT30870-2014)

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GB/T 30870-2014: Classification of special dense shaped refractory products
GB/T 30870-2014
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 81.080
Q 40
GB/T 30870-2014 / ISO 10081-4.2007
Classification of special dense shaped refractory
products
(ISO 10081-4.2007, Classification of dense shaped refractory products - Part
4. Special products, IDT)
ISSUED ON. JULY 24, 2014
IMPLEMENTED ON. FEBRUARY 1, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Classification principle ... 4 
3 Classification ... 4 
4 Other refractory products... 12 
5 Designation of a special product ... 12 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard uses translation method and identically adopts ISO 10081-
4.2007 Classification of dense shaped refractory products - Part 4. Special
products.
This Standard makes following editorial modification.
- deleted Bibliography.
This Standard was proposed by and shall be under the jurisdiction of National
Technical Committee on Refractory materials of Standardization Administration
of China (SAC/TC 193).
The drafting organizations of this Standard. Metallurgical Industry Information
Standards Institute, Sinosteel Luoyang Refractories Research Institute Co., Ltd.,
Ruitai Technology Co., Ltd., Zhejiang Zili Company Limited.
Main drafters of this Standard. Qiu Jinhui, Gao Jianping, Yuan Lin, Peng Xigao,
Wang Jiangwei, Cheng Jie, Wang Xiaoli, Zhao Yi.
Classification of special dense shaped refractory
products
1 Scope
This Standard specifies the classification and designation of dense shaped
refractory products of special composition including oxide products, oxide and
non-oxide products, non-oxide silicon carbide or carbon-based products, and
further special products which are only designated but not classified, for
example, non-oxide products, such as boride, nitride or further combinations of
the series listed above.
2 Classification principle
Dense shaped special products shall be classified according to the following six
criteria.
a) the type of product;
b) the group determined by the content of its main chemical component(s);
c) the principal raw material(s);
d) the state of the raw materials;
e) the nature of the bond;
f) any post-treatment;
3 Classification
3.1 Type of product
The following types of dense shaped refractory special products shall be
classified by chemical analysis as shown in 3.2.
a) alumina-chromia (ACr);
b) chromia (Cr);
c) alumina-chromia-zirconia (ACrZ);
designation of dense shaped refractory products of the mentioned series.
EXAMPLES Some examples of designations are as follows.
‐ alumina-chromia products in the group ACr70/5, based on synthetic
sintered corundum and chromia with an oxide ceramic bond;
‐ alumina-zirconia-silica products of the group AZS15, based on synthetic
sintered corundum and naturally occurring zircon with an oxide ceramic
bond;
‐ alumina-carbon products with antioxidant additives of the group AC80/5A,
based on naturally occurring sintered bauxite with an organic chemical
bond, with tempering;
‐ silicon carbide products of the group SiC70, based on synthetic silicon
carbide with silicon nitride bond;
‐ carbon product of the group C60, based on synthetic graphite with an
organic chemical bond formed at higher temperatures.