Some standard content:
ICS77.180
J61
JB
Machinery Industry Standard of the People's Republic of China
JB/T6576.1-1999
Cupola
Released on 1999-05-14
Technical conditions
Implemented on 2000-01-01
National Machinery Industry Bureau
Released
JB/T6576.1- 1999 |
This standard replaces ZBJ61012-89 from the date of implementation. This standard is proposed and administered by the National Foundry Machinery Standardization Technical Committee. The units responsible for drafting this standard: Jinan Foundry and Forging Machinery Research Institute, Jiangyin Foundry Machinery Factory. This standard was first published in March 1989.
1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions
Cupola:
JB/T6576.1-1999
Replaces ZBJ61012-89
This standard specifies the technical requirements, test methods, inspection rules and markings, packaging, transportation, storage, etc. for cupola furnaces used in cast iron production. This standard is applicable to the hourly smelting volume of molten iron using coke as fuel. The furnace-lined ordinary cupola (hereinafter referred to as the cupola) is suitable for 1 to 10 tons of cold air or furnace hot air.
2
Quoted standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB 1911990
GB/T9851988
GB/T 1804—1992
GB/T5226.1—1996
GB/T13306—1991
JB/ T1644—1991
JB/T3000—1991
JB/T6331.2—1992
3 technical requirements and test methods
Packaging, storage and transportation pictorial mark||tt ||Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding General tolerances Unnoted tolerances for linear dimensions
Industrial machinery and electrical equipment Part 1: General technical conditions signs
General technical conditions for foundry machinery
Method for compiling casting equipment models
Method for determination of noise of foundry machinery Sound pressure level determination 3.1 The use and manufacture of cupolas shall comply with the requirements of this standard and the general requirements of JB/T1644 , the drawings must be approved according to the prescribed procedures. 3.2 Cupola furnaces are divided into seven specifications according to their melting rates: 1, 2, 3, 5, (7), 8, and 10t/h, of which 7th is a transitional specification. Product models should be prepared in accordance with the provisions of JB/T3000 and applied to the responsible unit. 3.3 Cupola furnace performance requirements
3.3.1 The cupola furnace should ensure that it can operate continuously for more than 8 hours per smelting. 3.3.2 The average melting speed shall not be less than the rated hourly melting rate of the cupola furnace of corresponding specifications. The test of the average melting speed should be determined based on the average molten iron volume in the hour from the start of air supply smelting to the end of the air supply in the cupola. The air supply smelting time shall not be less than 4 hours.
3.3.3 When using casting coke, the average temperature of the molten iron shall not be lower than 1500°C; when using metallurgical coke, the average temperature of the molten iron shall not be lower than 1450°C. Use a fast thermocouple to test the temperature of the molten iron, and the temperature measurement position shall be at a distance from the tapping point. In the tapping trough with an opening of 300mm. One hour after the start of smelting, the molten iron in the front furnace is drained out, and the temperature is measured when the molten iron is poured out again. From now on, the temperature shall be measured every 0.5 h, and the number of temperature measurements shall be no less than 6 times. The arithmetic mean of the measured temperature data shall be the average temperature of the molten iron. 3.3.4 The total coke consumption of cupola furnace smelting should not be greater than the data listed in Table 1. State Machinery Industry Bureau approved the implementation on 2000-01-01 on 1999-05-14
1
Melting rate
t/h
Total coke consumption||tt| |%
14
2
14
JB/T6576.1-1999
Table 1
3
13
n
13
(7)
2
The total coke consumption should be determined after removing the remaining coke and iron materials after the furnace is opened. actual consumption calculation. 3.3.5 The FeO content in the slag shall not exceed 5%. 8
12
10
12
To test the FeO content in the slag, sampling should be started 1 hour after melting, and the sampling should be no less than 3 times, with intervals between each time 0.5h, the samples were tested according to conventional chemical analysis methods, and the average value was taken as the FeO content of the slag. 3.4 Technical requirements for cupola manufacturing
3.4.1 Q235 steel material among ordinary carbon steels or boiler steel materials for special purposes should generally be used to manufacture cupola furnaces. Cupola furnace shell diameter reference table 2 selection:
3.4.2
Table 2
melting rate
th
furnace shell diameter||tt| |mm
800
2
1020
3
1200
5
1400
( 7)
1500
90
1600
10
1900
The minimum thickness of the steel plate in the main parts of the cupola is selected according to Table 3. The bottom plate is allowed to be cast or steel frame. The connecting flange is allowed to use 3.4.3
steel castings or section steel.
Table 3
Tower
Part
Bit
Connecting flange
Flange rib plate
furnace shell| |tt||Blowbox
Baseboard
10
8
6
4
26
2||tt ||12
8
6
4
30
3
most
16
10
8
5
36
化
小
20
10
8| |tt||5.
46
rate
thickness
th
(7)
degree
24
12
10
6
52
3.4.4 The end bolt holes on the furnace shell connecting flange should be made, the diameter and number of bolts used See Table 4: 2
26
12
10
6
56
mm
10||tt ||26
12
10
6
60
Melt rate
t/h
Bolt diameter| |tt||mm
Number of bolts
3.4.5 Welding requirements
-
16
12||tt| |16
12
JB/T6576.1-1999
Table 4
m
20
16
s
20
16
3.4.5.1 Use AC and DC arc welding, and use electrodes of corresponding materials for welding. (7)
24
24
8
24
24
3.4.5.2 The furnace body should use continuous welds. The basic type and size of welded joints shall be in accordance with the provisions of GB/T985. 3.4.5.3 Weld quality shall be inspected by visual inspection and measured dimensions. 10 | | tt | | 24 | | tt | | 24 | The verticality between the furnace shell and the flange end face shall not be greater than 2mm. The furnace shell diameter deviation and roundness tolerance are shown in Table 5. Table 5
Melt rate
th
Diameter deviation
Roundness tolerance
3.5Appearance requirements
1
±4
S5
2
±4
≤5
3|| tt||+5
6
5
*5
$6
3.5.1 The surface of the cupola should be smooth and flat. Raised and uneven areas on the surface should be polished and trimmed. (7)
±6
7
8
±6
7
mm
10||tt ||±6
7
3.5.2 The outer surface of the cupola should be coated with anti-rust alkyd primer before leaving the factory. The top coat can be coated with alkyd heat-resistant aluminum after the product is installed according to user requirements. paint.
3.6 Installation requirements
3.6.1 When installing the cupola, asbestos seals should be added between the flanges of each section of the furnace shell. 3.6.2 The overall connection of the cupola should be firm, and the center deviation of the full height should not be greater than 0.2%. 3.7 Safety and environmental protection requirements
3.7.1 The electrical equipment used in the cupola shall comply with the requirements of GB/T5226.1. 3.7.2 Cupolas with elevated working platforms should be equipped with escalators in accordance with relevant standards, and there should be protective railings on the platform. The height of the railing is 1050~1200mmc
3.7.3 The fan used in the cupola should have a silencer device and be placed in a soundproof room. Taking the soundproof room as the noise source and measuring it according to JB/T6331.2, the noise should not be greater than 85dB(A). 3.7.4 The cupola should be equipped with dust removal equipment (specify when ordering it is supplied with the machine or prepared by yourself) to control dust during the smelting process. The emission concentration complies with the regulations of the national and local environmental protection departments. The measurement of dust emission concentration is carried out by the local environmental protection department in accordance with relevant regulations. 4. Acceptance rules
4.1 Product manufacturing acceptance
JB/T 6576.11999
4.1.1 Each cupola should be inspected by the manufacturer's inspection department in accordance with the current standards and drawing requirements of the product. It must be accompanied by a product manufacturing quality certificate before leaving the factory.
4.1.2 Each cupola should be inspected at the manufacturer for the following items: a) manufacturing materials;
b) structural type and geometric dimensions;
c) welding quality;
d) Appearance quality.
4.1.3 The technical documents supplied with each cupola include the following: a) Product instruction manual and installation drawings; b) Product manufacturing quality certificate;
c) Packing list;
①)) Equipment, accessory details list and spare parts working drawings. 4.2 Acceptance of product performance
4.2.1 Acceptance of use shall be carried out through the furnace test after the cupola installation has passed the inspection. The furnace test results should meet the service performance requirements of this standard or the cupola service performance requirements stipulated in the technical agreement signed with the manufacturer when the user places an order. 4.2.2 The furnace should generally be tested no more than five times, with each melting time not less than 4 hours. The smelting cast iron grade is HT200. If it meets this standard twice in a row, it is qualified. bZxz.net
4.2.3 Furnace test conditions
4.2.3.1 The operation must be carried out in accordance with the relevant cupola furnace smelting process regulations. 4.2.3.2 The air volume and air pressure required for cupola melting should meet the requirements of product design. The air volume is measured on the air supply duct using a standard orifice plate, and the location of the measuring point should meet the requirements of the corresponding standards. The wind pressure is measured on the upper end of the windbox using a U-shaped pressure gauge.
4.2.3.3 The composition, performance and other quality indicators of coke, flux, pig iron, ferroalloy and other materials should comply with the relevant regulations on the current acceptance technical conditions for commonly used casting materials.
4.2.3.4 For all metal furnace materials, the maximum linear size of the block should be less than one-half of the minimum diameter of the furnace at the charging port. The maximum weight of each piece of metal charge is shown in Table 6. Scrap steel should be derusted and recycled materials should be cleaned. Table 6
Melting rate
t/h
Pig iron
kg
Recycled material
kg
Scrap steel|| tt||kg
-
6~8
5
2
6-8
10
3
6~8
15
10
5
6-8
15
10||tt| |4.2.3.5 The block size of the ferroalloy thrown into the furnace should be 20-50mm, and the scrap size should be 5~20mm. 4
(7)
6-8
25
15
8
6-8
25| |tt||15
10
6-8
25
15
5 product marking, packaging, transportation, purchase and storage JB/T6576 .1-1999
5.1 Product labels should be made in accordance with GB/T13306. The sign is placed on the lower edge of the bellows at an angle of 90° to the cupola bridge. The logo content of the sign includes:
a) Product name:
b) Product model:
c) Melting rate;
d) Manufacturer name: || tt||e) Manufacturing date.
5.2 The cupola can be dismantled into components for transportation, and should comply with the regulations for railway, road, waterway transportation and mechanized loading. 5.3 Simple bundling packaging is allowed, but it should be numbered and marked, and the content of the mark should comply with the regulations of GB191. 5.4 Each component must not be stacked or hit.
5.5 Rain-shielding measures should be taken when storing in the open air to prevent rust.2 The air volume and air pressure required for cupola smelting should meet the requirements of product design. The air volume is measured on the air supply duct using a standard orifice plate, and the measurement point position should meet the requirements of the corresponding standards. The air pressure is measured on the upper end face of the bellows using a U-type pressure gauge.
4.2.3.3 The composition, performance and other quality indicators of coke, flux, pig iron, ferroalloys and other materials should meet the relevant provisions of the current technical conditions for acceptance of commonly used casting materials.
4.2.3.4 For all metal furnace charges, the maximum linear dimension of the material block should be less than half of the minimum diameter of the furnace at the charging port. The maximum weight of each piece of metal furnace charge is shown in Table 6. Scrap steel should be derusted and the returned materials should be cleaned. Table 6
Melt rate
t/h
Pig iron
kg
Return charge
kg
Scrap steel
kg
-
6~8
5
2
6-8
10
3
6~8
15
10
5
6-8
15
10
4.2.3.5 The size of ferroalloy charged into the furnace should be 20-50mm, and the size of scrap steel should be 5~20mm. 4
(7)
6-8
25
15
8
6-8
25
15
10
6-8
25
15
5 Product marking, packaging, transportation, purchase and storage JB/T6576.1-1999
5.1 Product labels shall be made in accordance with the provisions of GB/T13306. The labels shall be placed at the lower edge of the wind box at 90° to the cupola bridge. The label content includes:
a) Product name:
b) Product model:
c) Melting rate;
d) Manufacturer name:
e) Date of manufacture.
5.2 The cupola can be disassembled into parts for transportation and should comply with the regulations on railway, road, waterway transportation and mechanized loading. 5.3 Simple bundling packaging is allowed, but it should be numbered and marked, and the marking content should comply with the provisions of GB191. 5.4 The parts shall not be piled or hit.
5.5 Rain protection measures should be taken when storing in the open air to prevent rust.2. The air volume and air pressure required for cupola melting should meet the requirements of product design. The air volume is measured on the air supply duct using a standard orifice plate, and the location of the measuring point should meet the requirements of the corresponding standards. The wind pressure is measured on the upper end of the windbox using a U-shaped pressure gauge.
4.2.3.3 The composition, performance and other quality indicators of coke, flux, pig iron, ferroalloy and other materials should comply with the relevant regulations on the current acceptance technical conditions for commonly used casting materials.
4.2.3.4 For all metal furnace materials, the maximum linear size of the block should be less than one-half of the minimum diameter of the furnace at the charging port. The maximum weight of each piece of metal charge is shown in Table 6. Scrap steel should be derusted and recycled materials should be cleaned. Table 6
Melting rate
t/h
Pig iron
kg
Recycled material
kg
Scrap steel|| tt||kg
-
6~8
5
2
6-8
10
3
6~8
15
10
5
6-8
15
10||tt| |4.2.3.5 The block size of the ferroalloy thrown into the furnace should be 20-50mm, and the scrap size should be 5~20mm. 4
(7)
6-8
25
15
8
6-8
25| |tt||15
10
6-8
25
15
5 product marking, packaging, transportation, purchase and storage JB/T6576 .1-1999
5.1 Product labels should be made in accordance with GB/T13306. The sign is placed on the lower edge of the bellows at an angle of 90° to the cupola bridge. The logo content of the sign includes:
a) Product name:
b) Product model:
c) Melting rate;
d) Manufacturer name: || tt||e) Manufacturing date.
5.2 The cupola can be dismantled into components for transportation, and should comply with the regulations for railway, road, waterway transportation and mechanized loading. 5.3 Simple bundling packaging is allowed, but it should be numbered and marked, and the content of the mark should comply with the regulations of GB191. 5.4 Each component must not be stacked or hit.
5.5 Rain-shielding measures should be taken when storing in the open air to prevent rust.
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