CB 1081.6-1989 Special auxiliary machine equipment hot processing working hours quota steelmaking
Some standard content:
China State Shipbuilding Corporation Department Standard
CB1081.6-89
Special Auxiliary Machine Armament Hot Processing Man-hour Quota
1989-01-01 Issued
China State Shipbuilding Corporation Issued
1989-05-01 Implementation
Subject Content and Scope of Application
China State Shipbuilding Corporation Department Standard
Special Auxiliary Machine Armament Hot Processing Man-hour Quota
This standard specifies the special auxiliary machine armament steelmaking man-hour quota. This standard is applicable to steelmaking production in the shipbuilding industry. 2 General Principles
2.1 This standard is formulated according to the process steps, with the smelting part using machine hours and the non-smelting part using group hours. CB1081.6—89
Classification: U02
2.2 The working hours quota of this standard includes: basic time, auxiliary time, work place arrangement time, preparation end time and rest and physiological needs time (except for those specified separately).
2.3 The working hours quota standard of electric arc furnace (hereinafter referred to as electric furnace) is formulated according to the transformer capacity parameter (without impedance) and the furnace shell loading amount in four levels.
2.4 The working hours quota standard of 35t alkaline open-hearth furnace (hereinafter referred to as open-hearth furnace) is formulated according to the molten pool loading amount in four levels. 2.5 The technical level specified in this standard is determined in accordance with the "Technical Level Standard for Shipbuilding Industry Workers" promulgated by China State Shipbuilding Corporation in 1983.
The melting loss rate of electric furnace and open-hearth furnace is 6%, and the pouring rate is 4%~8%. 3 Equipment quota is shown in Table 1.
Equipment classification
1.5t electric furnace
3t electric furnace
5t electric furnace
10t electric furnace
15t electric furnace
35t open hearth furnace
Man/unit
Hot-repair bricklayer
Man/unit
Staffing based on the amount of knotted magnesia
Note: ① The staffing for the furnace wall is 2 people per pneumatic hammer, and each hammer can knot 40Kg of tar magnesia or 180Kg of brine magnesia per hour; ② The work of the non-smelting part serves several furnaces, so the staffing has decimals. Approved by China State Shipbuilding Corporation on January 10, 1989 and implemented on May 1, 1989
Classification of steel grades
CB1081.6-89
Classification of common steel grades in electric furnaces according to mechanical property requirements, smelting characteristics and uses is shown in Table 2. 4.1
Classification of steel grades
Mechanical property requirements, smelting characteristics and uses of various steel grades Ordinary carbon structural steel. Mainly used for rolling ordinary building materials, B3~B5 requires high and low magnification mechanical properties, ultrasonic flaw detection, inspection (or ultrasonic detection quality assurance), ingots less than 10t or instruments provide chemical composition: carbon steel, carbon manganese steel, carbon tool steel, low alloy structural steel, T. Mn, 15Mn~65Mn, 10~85° steel, T, ~T. Steel, welding wire steel, T. MnSA, 30Mn2~60Mn2, 20Cr~55Cr, 15CrMo~60CtMo, 40CrViMo, 50CrMnMo, etc. require low-power mechanical properties, ultrasonic flaw detection, magnetic flaw detection and inclusion requirements: 10,000-ton ship shaft steel, roll steel, crankshaft steel, carbon steel, carbon manganese steel, carbon tool steel, low alloy structural steel, large machine forging steel, some pressure vessel steel. Military products. 30Mn2~50Mn2, 20Cr~55Cr, 15CrMo~60CrMo, etc. Steels containing chromium, nickel, tungsten or titanium: 18CrNiWA~40CrNiWA, 925, 30CrNiWA, 18CrMnTi, 16CrMnTiA, 20CrMnTiMnTi, 25CrMnNiTiA, 30CrMnMoTiA, etc. Stainless steel and heat-resistant steel: Cr1s stainless steel, CrgMo1Cr25Si2, 1Cr2sNiis heat-resistant non-scaling steel, etc. Steels containing aluminum or: 38CrMoA1A, 38CrWVA1A, 3CrA1A, CF-62, 18CrMnMoB, 40MnVB, etc.
Ping The classification of commonly used furnace-smelted steel grades according to mechanical requirements, smelting characteristics and uses is shown in Table 3. 4.2
Classification of steel grades
Mechanical performance requirements, smelting characteristics and uses of each steel grade Ordinary carbon structural steel, used for rolling ordinary building materials: Bs~Bs products that do not require flaw detection and high and low magnification inspections, steel ingots less than 8t: 10~30° steel 86ZC23~~86ZC31, 86ZC37~86ZC48
Products that require flaw detection and high and low magnification inspections, steel ingots less than 18t; 35'~65\ steel high-quality carbon steel greater than 18t, 35A~45A, T, ~T. Ordinary alloy steel: 12CrMo~45CrMo, 30Cr~50Cr, 30CrMo~45CrMo, 5CrMnMo, 5CrNiMo, 15Mn~60Mn, 20Mnz~50Mn2 Various high-grade high-quality alloy steels
5 The standard of supplementary working hours for exceeding the specified range of the process is CB1081.9-89
5.1 Supplementary working hours for carbon or phosphorus elements: electric furnace is added during the oxidation period; open-hearth furnace is added during the ore boiling period. Sulfur element supplementary working hours: electric furnace is added during the reduction period, open-hearth furnace is added during the pure boiling period. 5.2
The supplementary working hours for smelting and molten clear components exceeding the specified range of the process are shown in Table 45.3
Carbon content in electric furnace
Carbon content in open-hearth furnace
Phosphorus content
Sulfur content
Note: If more than two factors affect the same process step, only the factor with the longest influence will be supplemented. 8 Electric furnace
6.11.5t electric furnace (transformer capacity 1500KVA) working hours quota see Table 5. Table 5
Loading amount
Packing furnace
min/furnace
Loading amount
Packing furnace
CB1081.6—89
Continued Table 5
6.23t electric furnace (transformer capacity 1800KVA) working hours quota see Table 6 Refining
Packing furnace
min/furnace
min/furnace
Packing furnace
CB1081.6—89
Continued 6
6.35t electric furnace (transformer capacity 3200KVA) working hours quota see Table 7. Week
min/furnace
>11.0~12.5
>12.5~14.0
>14.0~15.5
>11.0~12.5
>12.5~14.0||tt| |>14.0~15.5
>11.0~12.5
>12.5~14.0
>14.0~15.5
>11.0~12.5
>12.5~14.0
>14.0~15.5
>11.0~12.5
>12.5~14.0
>14.0~15.5
>11.0~12.5
>12.5~14.0
>14.0~15.5
Packing furnace
CB1081.6—89
min/furnace
CB1081.6—89
The working hour quota of 6.45t electric furnace (transformer capacity 3900KVA) is shown in Table 8. Table 8
Packing furnace
min/furnace
CB1081.6—89
6.510t electric furnace (transformer capacity 5000KVA) working hours quota see Table 9. Table 9
>14~16
>16~18
>18～20
>14~16
>16~18
>18~20
>14~16
>16~18
>18~20
>14~16
>16~18| |tt||>18~20
>14~16
>16~18
>18~20
>14~16
>16~18
>18~20
Packing furnace
min/furnace
6.6Instructions for use of Table 5~Table 9:
CB1081.6—89
When the number of charging exceeds one, the excess number shall be added to the melting period as 5 minutes per time: a
When smelting, such as oxygen blowing to assist melting, melting period and oxidation period, the labor quota correction coefficient K=0.8; b
Cold furnace smelting, melting period labor quota correction coefficient K=1.2; c.
New furnace unbaked furnace charging smelting, melting period labor quota correction coefficient K=1.25. d.
6.7 Auxiliary work of electric furnace smelting.
6.7.1 Contents of maintenance operation for smelting equipment replacement: Preparation work includes preparation of lower electrodes, lower water pipes, lower pins, lower screws and hangers, and furnace gluing tools; a.
Gluing furnace bottom includes 1~3 starts and preparation of furnace bottom padding materials; b.
The waste heat oven includes the electrode cover and furnace cover;
Lifting and replacement includes lifting away the old furnace cover and the old furnace shell, and lifting the new furnace cover and the new furnace shell back to their positions; installation and commissioning include placing electrodes, water pipes, latches, and screws, and sending the electric oven includes placing electrodes and lifting out the furnace electrodes. The working hours quota for auxiliary operations of electric furnace smelting is shown in Table 10.6.7.2
Smelting auxiliary
Operation items
Replacement of furnace cover
Replacement of furnace shell
Furnace bottom maintenance
Gluing furnace bottom
Padding furnace bottom
Lifting, replacement, installation, commissioning and sending electric oven
Note: Gluing furnace bottom and padding furnace bottom are mainly used for water-cooled slag hanging furnace wall 7 flat furnace
7.1 The basic smelting working hours quota is shown in Table 11.
min/furnace
Technical level
Furnace service life
Charge amount
>38~42
>42~46
>46~50
>38~42
>42~46
>46~50
≥38~42
>42~46
>46~50
>38~42
≥42~46
>46~50
>38~42
>4 2~46
>38~42www.bzxz.net
>42~46
>46~50
CB1081.6—89
min/furnace
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