YB/T 4108-2002 Wear-resistant firebricks for circulating fluidized bed boilers
2023-12-14
Refractory bricks for circulating fluidized bed boilers
1 Scope
This standard specifies the classification, technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and quality certificates of wear-resistant refractory bricks for circulating fluidized bed boilers.
This standard applies to wear-resistant refractory bricks used in easily eroded and worn parts inside circulating fluidized bed boilers. , It is also applicable to wear-resistant refractory bricks used in severely eroded and worn parts of the lining of other industrial kilns.
2 Normative documents
The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, , all subsequent amendments ( excluding errata ) or revisions are not applicable to this standard. , However, parties to agreements based on this standard are encouraged to investigate whether the latest versions of these documents can be used. For undated reference documents, , the latest version applies to this standard.
GB/T 2992 1998 General refractory brick shapes and sizes
GB/T2997 2000 Test methods for bulk density, apparent porosity and true porosity of dense shaped refractory products
GB/T 5072-1985 Test method for compressive strength at room temperature of dense shaped refractory products
GB/T 6900.4 1986 Chemical analysis methods for clay and high-alumina refractory materials EDTA Volumetric determination of alumina
GB/T 7321-1987 Regulations for sample preparation for testing of dense shaped refractory products
GB/T 10325 1988 Rules for stacking, sampling, acceptance, storage and transportation of refractory products
GB/T 10326 1988 Inspection methods for dimensions, appearance and cross-section of refractory products
GB/T 16546 1996 Packaging, marking, transportation and storage of shaped refractory products
GB/T 18301 2001 Test method for room temperature wear resistance of refractory materials
YB/T 376.1 1995 Test method for thermal shock resistance of refractory products ( Water quenching method )
3 Classification, shape and size
3.1 Bricks are classified into three grades: NMZ-1, NMZ-2, and NMZ-3, according to their physicochemical properties. NM and Z represent the first letters of the pinyin of "耐" (耐磨), "磨" (耐磨), and "砖" (耐火砖), respectively.
3.2 The shape and size of the bricks shall conform to the provisions of GB/T2992, and other brick types shall be negotiated by both the supplier and the demander.
4 Technical requirements
4.1 The physicochemical properties of the bricks shall conform to the provisions of Table 1.
4.2 The dimensional tolerances and appearance of the bricks shall conform to the provisions of Table 2. The bricks shall not have cross-sectional cracks. Special technical requirements shall be determined by negotiation between the supplier and the demander.
Table 1 Physicochemical properties of bricks | |||
Item | Index | ||
NMZ-1 | NMZ-2 | NMZ-3 | |
Al 2 O 3 % ≥ | 55 | 65 | 80 |
Apparent porosity,% ≤ | 21 | 20 | 19 |
Bulk density, g/cm 3 ≥ | 2.40 | 2.70 | 2.85 |
Compressive strength at room temperature, MPa ≥ | 60 | 70 | 90 |
Thermal shock resistance,(1000℃, water cooling), times ≥ | 20 | 20 | 20 |
Room temperature wear, cm 3 ≤ | 9 | 8 | 6 |
Table 2 Dimensional tolerances and appearance of bricks Unit: mm | |||
Item | Index | ||
Dimensional tolerance | Size ≤100 | ±2 | |
Size 101~300 | +2% | ||
Size 301~400 | ±6 | ||
Twist | Length ≤300 | Not more than | 2.0 |
Length 301-400 | 2.5 | ||
Corner chipping length (a+b+c) | 40 | ||
Edge chipping length (a+b+c) | 60 | ||
Blister diameter | 6 | ||
Crack length | Width ≤0.25 | Unlimited (not allowed to form a network) | |
Width 0.26~0.50 | 50 | ||
Width 0.51-1.0 | 20 | ||
Width >1.0 | Not allowed | ||
5 Test methods
5.1 Sample preparation for brick inspection shall be carried out according to GB/T 7321.
5.2 Determination of alumina content shall be carried out according to GB/T 6900.4.
5.3 Bulk density test shall be carried out according to GB/T 2997.
5.4 Room temperature compressive strength test shall be carried out according to GB/T 5072.
5.5 Determination of room temperature wear shall be carried out according to GB/T 18301.
5.6 The test for thermal shock resistance shall be carried out according to GB/T 376.1, but the test temperature is 1000℃.
5.7 Inspection of appearance, dimensions and section of bricks shall be carried out according to GB/T 10326.
6 Inspection Rules
Sampling and acceptance of bricks shall be carried out according to GB/T 10325.
7 Packaging, Marking, Transportation, Storage and Quality Certificate
7.1 Packaging, marking, transportation and storage of bricks shall comply with GB/T 16546.
7.2 A quality certificate must be attached during delivery, stating the name or factory mark of the supplier, the name of the demander, the production date, the contract number, the standard number, the product grade, the brick number, the batch number and the dimensions, appearance and test results of physical and chemical indexes.
Refractory bricks for circulating fluidized bed boilers
1 Range
This standard specifies the classification, technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and quality certificate of wear-resistant firebricks used in circulating fluidized bed boilers.
This standard is applicable to the wear-resistant refractory bricks in the circulating fluidized bed boiler which are easy to be washed and worn, and also to the wear-resistant refractory bricks in other industrial kiln lining which are severely washed and worn.
2 Normative 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 2992 1998 General purpose firebrick shapes and dimensions
GB/T 2997 2000 Test method for bulk density, apparent porosity and true porosity of dense shaped refractory products
GB/T 5072-1985 Test method for compressive strength of dense shaped refractory products at room temperature
GB/T 6900.4 1986 Methods for chemical analysis of clay and high alumina refractories — the EDTA volumetric method for the determination of alumina content
GB/T 7321-1987 Dense shaped refractory products test sample preparation requirements
GB/T 10325 1988 Rules for stacking, sampling, acceptance, storage and transportation of refractory products
GB/T 10326 1988 Method for inspection of size, appearance and section of refractory products
GB/T 16546 1996 Packaging, marking, transport and storage of shaped refractory products
GB/T 18301 2001 Test method for wear resistance of refractory materials at normal temperature
YB/T 376.1 1995 Test method for thermal shock Resistance of refractory products (water quench method)
3 Classification, shape and size
3.1 Bricks are divided into NMZ-1, NMZ-2, NMZ-3 grades according to physical and chemical indexes. NM and Z respectively represent the first letter of the Chinese pinyin characters of Nai, grinding and brick.
3.2 The shape and size of the brick shall comply with the provisions of GB/T 2992, and other brick types shall be negotiated by the supply and demand parties.
4 Technical Requirements
4.1 The physical and chemical indexes of bricks shall comply with the provisions of Table 1.
4.2 The size permissible deviation and appearance of the brick shall comply with the provisions of Table 2. Bricks are not allowed to have sectional lamination, and the special technical requirements are determined by the supply and demand parties through negotiation.
Table 1 Physical and chemical indexes of bricks | |||
Item | Index | ||
NMZ-1 | NMZ-2 | NMZ-3 | |
Al 2 O 3 % ≥ | 55 | 65 | 80 |
Apparent porosity，% ≤ | 21 | 20 | 19 |
Bulk density，g/cm³ 3 ≥ | 2.40 | 2.70 | 2.85 |
Compressive strength at room temperature，MPa ≥ | 60 | 70 | 90 |
Thermal shock resistance，(1000℃，water-cooling)，time ≥ | 20 | 20 | 20 |
Normal temperature wear，cm 3 ≤ | 9 | 8 | 6 |
Table 2. Permissible size deviation and appearance of bricks Unit in millimeter | |||
Item | Index | ||
Allowable deviation of dimension | Dimension ≤ 100 | ±2 | |
Dimension 101～300 | +2% | ||
Dimension 301～400 | ±6 | ||
Contort | Length ≤ 300 | Not more than | 2.0 |
Length301-400 | 2.5 | ||
Missing Angle length (a+b+c) | 40 | ||
Missing edge length (a+b+c) | 60 | ||
Hole diameter | 6 | ||
Crack length | Breadth ≤ 0.25 | No limit (no mesh allowed) | |
Breadth 0.26～0.50 | 50 | ||
Breadth0.51-1.0 | 20 | ||
Breadth > 1.0 | Be forbidden from | ||
5 Test methods
5.1 The brick inspection sample preparation shall be carried out according to GB/T 7321.
5.2 Aluminum oxide is determined in accordance with the provisions of GB/T 6900.4.
5.3 Inspection of bulk density shall be carried out according to GB/T 2997.
5.4 The compressive strength test at room temperature shall be conducted according to GB/T 5072.
5.5 Room temperature wear shall be measured according to GB/T 18301.
5.6 The thermal shock resistance test shall be conducted according to GB/T376.1, but the test temperature shall be 1000°C.
5.7 Inspection of the appearance, size, and section of the bricks shall be carried out in accordance with GB/T 10326.
6 Inspection Rules
Sampling and acceptance of bricks shall be carried out in accordance with GB/T 10325.
7 Packing, marking, transportation, storage and quality certificate
7.1 The packaging, marking, transportation, and storage of bricks shall comply with GB/T 16546.
7.2 Delivery must be accompanied by a quality certificate indicating the supplier's name or factory standard, the demander's name, production date, contract number, standard number, product grade, brick number, batch number, and inspection results for size, appearance, and physical and chemical indices.
Previous Page:
Feedback
Leave a message now, and we will arrange for a specialist to contact you as soon as possible.
HENAN SINO INDUSTRIAL REFRACTORY NEW MATERIAL CO. LTD
Factory Address:
Mazhai, Zhengzhou, China
Nanlou, Dashiqiao, China
Xinmi, Zhengzhou, China
Samut Sakhon， Thailand
Klang ，Malaysia
Copyright © Henan Sino Industrial Refractory New Material Co. Ltd
Privacy Agreement Supports IPV6 SEO