This standard specifies the technical requirements, test methods, inspection rules and pre-assembly and inspection methods of ordinary blast furnace carbon blocks. This standard is used for materials used to build blast furnace linings made of anthracite and metallurgical coke calcined at 1250℃～1400℃. YB/T 2804-2001 Ordinary blast furnace carbon blocks YB/T2804-2001 Standard download decompression password: www.bzxz.net

YB/T 2804—2001
This standard is revised on the basis of the original YB/T2804--1991 "Blast Furnace Carbon Block". The main revisions are as follows: - Standard name;
- Standard writing format
Reference standards:
Compressive strength, ash content, alkali resistance in physical and chemical indicators; At the same time, fixed carbon and other requirements are added;
Some contents in Appendix A have been revised.
Appendix A of this standard is the appendix of the standard. From the date of implementation, this standard replaces YB/T2804-1991 "Blast Furnace Carbon Block". This standard is proposed and managed by the Metallurgical Industry Information Standards Research Institute. The main drafting units of this standard are: Lanzhou Carbon Co., Ltd., Metallurgical Industry Information Standards Research Institute. The main drafters of this standard are: Liu Chengquan, Tang Xuehui, and Sun Wei. This standard was first issued in 1991.
People's Republic of China Black Metallurgical Industry Standard Ordinary Blast Furnace Carbon Block
Carbon block for blast furnacesYB/T 2804—2001
Replaces YB/T2804—1991
This standard specifies the technical requirements, test methods, inspection rules and pre-assembly and inspection methods of ordinary blast furnace carbon blocks. This standard applies to materials used for lining blast furnaces made of anthracite and metallurgical coke burned at 1250℃～1400℃ as the main raw materials.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1427-2000 Sampling method for carbon materials GB/T1429—1985 Determination method for ash content of carbon materials GB/T 1431—1985
GB/T 2001—1991
Determination method for compressive strength of carbon materials
Analysis and determination method for coke industry
GB/T 3074. 1-1985
GB/T 6165—1985
GB/T 8719--1997
YB/T 119—1997
YB/T 4034—2001
YB/T 5192—1993
YB/T 5213--1993
YB/T 5291--1999
3 Technical requirements
Determination method of flexural strength of carbon materials
Determination method of true porosity of carbon materials
General provisions for packaging, marking, storage, transportation and quality certificate of carbon materials and their productsDetermination method of bulk density of carbon materials
Dimensions and appearance inspection method of blast furnace carbon blocks
Dimensions of blast furnace carbon blocks
Test method for alkali resistance of carbon blocks
Test method for thermal conductivity of blast furnace carbon blocks
3.1 The physical and chemical indicators of blast furnace blocks shall comply with the requirements of Table 1. Table 1 Physical and chemical indicators of ordinary blast furnace carbon blocks
Compressive strength
True porosity
Bulk density
Alkali resistance
Fixed carbon
Thermal conductivity (900℃)
Not less than
Not greater than
Not less than
Not less than
Not less than
W/(m·K)
Note: Thermal conductivity is only used as a design reference, not as an acceptance basis. Approved by the State Economic and Trade Commission on July 9, 2001, implemented on January 1, 2002
YB/T2804—2001
The allowable deviation of the size of blast furnace carbon blocks shall comply with the provisions of Table 2. 3.2
Table 2 Size allowable deviation of blast furnace carbon blocks
and furnace
building method
annular layer
The appearance quality of blast furnace carbon blocks shall comply with the provisions of Table 3. 3.3
Table 3 Appearance quality of blast furnace carbon blocks
Defect name
Surface defect
Surface crack
and cross
shuttle crack
Specific requirements for appearance
Allowable deviation
With working end
1. The total length of the missing corners on the non-working surface distributed on the three shuttle edges (see Figure 1a) is not more than 150mm; 2. The total length of the missing corners on the working surface distributed on the three shuttle edges is not more than 100mm3. The length of the chipped corner is calculated from the depth of the edge greater than 5mm. 1. The intermittent grinding depth of the edge within 5mm is not counted, and the length is
without working end
2. The depth of the chipped corner is not greater than 20 mm;
3. The chipped corner defect is the sum of the defect width and the length of the chipped corner distributed on the two surfaces, that is, (a+6+c), as shown in Figure 1b. The sum of the chipped corners (a+b+c) on the working surface is not greater than 150mm; the sum of the chipped corners (a+b+c) on the non-working surface is not greater than 180mm, 4. For the carbon blocks in the furnace, the total length of the chipped corners (u) is not greater than 80mm within any one meter length. 5. For the carbon blocks in other parts, the cumulative length of the chipped corners (u) is not greater than 120mm within any meter length. The depth and diameter of the surface depression are not greater than 15 mm. Defects caused by the marks of the hoisting device are not counted. The depth of the knife mark is not more than 0.3mm, the width is not more than 20mm, and the length is not more than 100mm. 1. The crack width is less than 0.5mm and the length is less than 50mm. The furnace bottom
2. The crack width is less than 0.5mm, the length is 50mm~80mm, and no more than 3. The width of the cross-edge crack is less than 0.5mm, and the length of each side is not more than 100mm, and no more than one furnace hearthbzxz.net
1. The crack width is less than 0.5mm, the length is not more than 50mm, and no more than one place, 2. The width of the cross-edge crack is less than 0.5mm, and the length of each side is not more than 80mm, and no more than -3.4 The verticality deviation of the mutually perpendicular masonry contact surfaces of the charcoal blocks is not more than 0.6mm. 3.5 The distortion of the charcoal blocks with a length of no more than 1.5m should not be more than 5mm; the distortion of the charcoal blocks with a length of more than 1.5m should not be more than 0.5% of the length.
4 Test methods
4.1 The determination of ash content shall be carried out in accordance with the provisions of GB/T1429. The determination of true porosity shall be carried out in accordance with the provisions of GB/T6156. 4.2
4.3 The determination of compressive strength shall be carried out in accordance with the provisions of GB/T1431. 4.4 The determination of bulk density shall be carried out in accordance with the provisions of YB/T119. The determination of alkali resistance shall be carried out in accordance with the provisions of YB/T5213. 4.5
The determination of fixed carbon shall be carried out in accordance with the provisions of Chapter 6 of GB/T2001--1991. 4.6
The determination of thermal conductivity shall be carried out in accordance with the provisions of YB/T5291. 4.7
4.8 The test method for distortion shall be carried out in accordance with the provisions of Article 4.8 of YB/T4034-2001. 91
5 Inspection rules
YB/T 2804—2001
5.1 The acceptance and quality inspection of carbon blocks shall be carried out by the quality supervision and inspection department. 5.2 The sampling method shall be carried out in accordance with the provisions of GB/T1427. 5.3 The size and appearance quality of carbon blocks shall be inspected piece by piece in accordance with the provisions of YB/T4034. 6 Pre-assembly and inspection method of blast furnace carbon blocks
Pre-assembly and inspection method of blast furnace carbon blocks shall be carried out in accordance with the provisions of Appendix A. 7 Packaging, marking, transportation, purchase and storage and quality certificate Packaging, marking, transportation, storage and quality certificate shall be carried out in accordance with the provisions of GB/T8719. (a)
A1 Fully covered furnace bottom
A1.1 Platform
YB/T 2804—2001
Appendix A
(Appendix to the standard)
Pre-assembly and inspection method of blast furnace carbon blocks
A7.1.1 The platform and size shall meet the requirements for pre-assembly of the entire layer of carbon blocks. A1.1.2 The flatness deviation shall not exceed 0.3 mm. A1.2 The length deviation of each group of carbon blocks (referring to the maximum design length) A1.2.1 With working end: ±10 mm.
A1.2.2 Without working end: ±20 mm.
A7.2.3 If the length of a single carbon block in each row (group) is less than the specified size (150 mm), it is allowed to be adjusted with the remaining carbon blocks in the row (group) to keep the total length of the row (group) unchanged, and each layer shall not exceed 6 rows. A1.2.4 The deviation of the width direction of each row (group) of carbon blocks is ±0.5mm. A1.3 The gap of carbon blocks
A1.3.1 When two carbon blocks are overlapped at an angle, the gap is not greater than 1.5mm. A1.3.2 When the ends and both sides of two carbon blocks are connected at right angles, the gap is not greater than 0.5mm. A1.4 Inspection method of horizontal seams
A1.4.1 Place the charcoal block on the platform, and place a 2m or longer ruler on the charcoal block. Use a feeler gauge to measure the gap between the platform and the charcoal block and between the charcoal block and the horizontal ruler. The lower horizontal gap is no more than 0.5mm, and the upper horizontal gap is no more than 0.8mm. When checking the vertical charcoal blocks, the upper horizontal gap is no more than 1mm, and the lower horizontal gap is no more than 0.7mm. A1.4.2 After passing the inspection, use the center line on the paint surface and the connecting line of all adjacent charcoal blocks. A2 Annular layer
A2.1 Check the horizontal and vertical seams on the platform A2.1.1 Choose a standard charcoal block as the mother block, and then place three adjacent charcoal blocks on both sides of it (each layer can be divided into two groups for inspection). Take away the qualified charcoal blocks from one side, and add two blocks from the other side for inspection. A2.1.2 The vertical gap between two adjacent charcoal blocks is no more than 1mm. A2.1.3 Place a 2m or longer ruler at any point on the top surface of three adjacent carbon blocks, and use a feeler gauge to measure the gap between the platform and the carbon blocks and the horizontal ruler. The lower horizontal gap is not more than 0.5mm, and the upper horizontal gap is not more than 0.8mm. A2.2 Pre-assembly on the horizontal platform
When building the horizontal platform, determine a firm center axis at the center point, and draw multiple groups of mutually perpendicular cross lines on the table. A2.3 Pre-installation diameter
A2.3.1 Pre-install according to the diameter specified in the design drawing. A2.3.2 The deviation of the inner diameter of the ring after pre-installation is ±10mm. A2.4 Pre-installation method
A2.4.1 Place the mother block on the 0° line, and the center line of the mother block coincides with the 0° line. Then lay qualified carbon blocks on one side (both sides) in turn and mark the serial numbers.
A2.4.2 The starting method of the second layer of mother blocks is half the width of the previous layer (the side of the mother block coincides with the 0° line). A2.4.3 The starting method of the 3rd, 5th, 7th and other layers is the same as the 1st layer; the starting method of the 4th, 6th, 8th and other layers is the same as the 2nd layer. A2.4.4 The mutual misalignment of the inner circles of adjacent carbon blocks shall not exceed 5mm, and the vertical misalignment size deviation of adjacent carbon blocks shall not exceed 2mm. 93
YB/T 2804—2001
A2.4.5 The vertical gap distance between the upper and lower layers of carbon blocks shall not be less than 40mm (except for the iron mouth area or the upper and lower layers of carbon blocks with different numbers, and there is no adjustment of carbon blocks with extra-large cross-sections, resulting in double seams). A2.4.6 The deviation between the radial line and the side line of the carbon block, when the length of the carbon block is less than 1500mm, whether the large or small end exceeds 10mm; when the length of the carbon block is greater than or equal to 1500mm, whether the large or small end exceeds 15mm, the adjustment block shall be used for adjustment. A2.4.7 The positions of the upper and lower layers of the carbon blocks for closing the door shall not overlap. A2.4.8 The width of the carbon block for closing the door is less than 1/4 of the standard block, and the width of the two blocks on the left and right of the closing door can be used to adjust (this block is not included in the number of adjustment blocks).
A2.4.9 The number of carbon blocks with closing the door of the tuyere is equal to the number of tuyere. A2.4.10 The pre-assembly dimensions and deviations of the iron mouth and tuyere shall meet the requirements of the design drawings. 1 In each annular layer, the number of adjustment blocks shall not exceed 4. A2.4.11
A2.4.12 Pre-assembly is performed once every 3 to 5 layers. A2.4.13 Adjustment blocks refer to carbon blocks whose width dimensions are not restricted by the requirements of the drawings. A3 Spare carbon blocks and other requirements
A3.1 The appearance of spare carbon blocks is the same as that of single carbon blocks, but they are not assembled. A3.2 The number of spare carbon blocks shall be specified by the user when placing an order. A3.3 Any end surface in contact with the rough seam paste is called a non-working end. A3.4 After each layer of pre-assembly is completed, the quality inspection department of the manufacturer shall be responsible for drawing the pre-assembly drawing, marking the layer number, serial number, control line, adjustment block, door closing block, etc. and handing it over to the user.
A3.5 During pre-assembly, the user and the construction unit may participate in the acceptance. 94
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