CN107941025A - The pre-heating mean of core rod of seamless - Google Patents
The pre-heating mean of core rod of seamless Download PDFInfo
- Publication number
- CN107941025A CN107941025A CN201711154311.3A CN201711154311A CN107941025A CN 107941025 A CN107941025 A CN 107941025A CN 201711154311 A CN201711154311 A CN 201711154311A CN 107941025 A CN107941025 A CN 107941025A
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- CN
- China
- Prior art keywords
- plug
- core rod
- hot
- temperature
- furnace
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of pre-heating mean of core rod of seamless, including：The hot-air system of core rod preheating furnace is connected with the heat exchanger placed in annular furnace, the heat in annular furnace flue gas is recycled using the heat exchanger, the hot-air after heating is imported into core rod preheating furnace；The hot blast temperature of the core rod preheating furnace is adjusted, fire box temperature is heated to design temperature；Plug is heated using hot-air, fire door is opened when plug temperature reaches 80 110 DEG C and sends out plug.The present invention can preheat plug using hot-air as heat source, have good promotional value.
Description
Technical field
The present invention relates to a kind of plug preheating technology, specifically, is related to a kind of preheating side of core rod of seamless
Method.
Background technology
Plug is one of important process tool of seamless steel tube rolling mill.Before plug comes into operation, it is necessary to which its is pre-
Heat, its purpose is in lubricant process is sprayed, lubricant is securely attached on mandrel surface.The prior art
In plug preheating method substantially using flue gas or electricity be used as heat source, flue gas is poisonous, unstable, has corrosion to plug
Effect；Electric preheating has the shortcomings that costly, heating-up temperature is uneven.
And hot-air has the advantages that nontoxic, stable, corrosion-free, heating-up temperature is uniform as heat source preheating, therefore, with
Hot-air preheats plug, and the heating process with optimal pre-heat effect for heat source, and is easy to what is realized in the industrial production
Plug preheating technology is always this area urgent problem to be solved.
The content of the invention
Technical problem solved by the invention is to provide a kind of pre-heating mean of core rod of seamless, can be with
Hot-air after annular furnace preheating preheats plug as heat source, has good promotional value.
To achieve the above object, technical solution of the present invention is as follows：
A kind of pre-heating mean of core rod of seamless, including：
The hot-air system of core rod preheating furnace is connected with the heat exchanger placed in annular furnace, annular is recycled using the heat exchanger
Heat in stove flue gas, the hot-air after being heated in the heat exchanger is pre- using the hot-air system importing plug
Hot stove；
The hot blast temperature of the core rod preheating furnace is adjusted, fire box temperature is heated to design temperature；According to the stove of core rod preheating furnace
Interior temperature adjusts the open degree of hot-blast valve in the hot-air system, it is ensured that core rod preheating furnace furnace temperature is stablized, and hot air temperature is
350-450℃；
Plug is heated using hot-air, when the plug parameter of preheating is：Diameter of mandrel is 104.7mm~460.6mm, plug
Total length is 12500mm~20000mm, and plug length of work segment is the 62.5%~94.9% of plug total length；Plug heating is maximum
Speed is 0.12 DEG C/s, and when diameter is less than 245.2mm, preheating time cannot be less than 25min；When diameter is not less than 245.2mm
When, preheating time cannot be less than 35min, and fire door is opened when plug temperature reaches 80-110 DEG C and sends out plug.
Further：The plug heating target temperature is 100 ± 10 DEG C.
Further：The regulating valve of supply air system is symmetrical in the core rod preheating furnace both sides, the monosymmetric tune
The aperture of section valve is identical, and two regulating valves in burner hearth on same position adjust valve group, the core rod preheating furnace for one
Described in adjust valve group unlatching quantity determined according to the diameter of mandrel and length of work segment.
Further：The unlatching quantity for adjusting valve group is 15-22 groups.
Compared with prior art, the technology of the present invention effect includes：The present invention is with nontoxic, corrosion-free, pressure stability, temperature
The hot-air controllable, impurity is less preheats core rod of seamless as heat source, by optimizing its pre-heating technique, makes core
Rod temperature is uniform, reaches optimal pre-heat effect.The present invention has the characteristics that economic, efficient, energy-saving and environmental protection, has well
Promotional value.
Brief description of the drawings
Fig. 1 is the flow chart of the pre-heating mean of core rod of seamless in the present invention.
Embodiment
In view of problem existing in the prior art, the present invention provides one kind using hot-air as heat source, and with efficient, section
Energy, the plug pre-heating mean of environmental protection.Hot-air is heated by flue gas caused by annular furnace in seamless steel tube production process
And formed, be UTILIZATION OF VESIDUAL HEAT IN effective way.
Below with reference to preferred embodiment, elaborate to technical solution of the present invention.
As shown in Figure 1, it is the flow chart of the pre-heating mean of core rod of seamless in the present invention.
Step 11：The plug preheating procedure in seamless steel tube production process is transformed, the heat source of core rod preheating furnace is changed to ring
The heat exchanger of shape stove, the hot-air system of core rod preheating furnace is connected with heat exchanger in annular furnace；
Plug preheating is the important production process together of seamless steel tube production, and the effect of core rod preheating furnace is from room temperature plug
Be heated to be adapted to rolling temperature, plug after the temperature (80-110 DEG C) that the heating of core rod preheating furnace reaches certain just
Steel billet can be rolled, the plug after heating can roll out the seamless steel pipe of different size.Annular furnace is used for heating tube
Base, its main feature is that furnace bottom is in a ring, pipe is carried under the action of furnace bottom driving device and is rotated by feeding end to discharge end, then
The pipe heated is taken out from discharging door by discharging machine.
In the present invention, heat source used in core rod preheating furnace is changed in seamless steel tube production process give up caused by annular furnace
Flue gas.Heat exchanger is added in the flue of annular furnace, heat exchanger in the hot-air system and annular furnace of core rod preheating furnace is connected
Connect, the heat in annular furnace flue gas is recycled using heat exchanger, the air heated in heat exchanger is imported using hot-air system
Core rod preheating furnace.This transform not only had realized that the Waste Heat Recovery of annular furnace utilized, but also changed the heat source of core rod preheating furnace.
In this preferred embodiment, three kinds of units of seamless steel tube production process are selected, are respectively 180 units of Φ, Φ 159
460 unit of unit and Φ, respectively transforms the preheating procedure of above-mentioned three kinds of units.
Step 12：The hot blast temperature of core rod preheating furnace is adjusted, fire box temperature is heated to design temperature；
The open degree of the hot-blast valve of hot-air system is adjusted according to the in-furnace temperature of core rod preheating furnace, it is ensured that core rod preheating furnace stove
Temperature is stablized, and hot air temperature is 350-450 DEG C.
The regulating valve of supply air system is symmetrical in core rod preheating furnace both sides, and the aperture of the symmetrical regulating valve in both sides is identical；Adjust
The unlatching quantity of valve group (two regulating valves in burner hearth on same position are an adjusting valve group) is saved according to needed for different units
Diameter of mandrel and length of work segment determine, usually open 15-22 groups.In hot-air system, hot wind valve opening is 70-80 ﹪
When, thermal current is steady, and plug preheating is uniform, and the thermal efficiency is optimal up to 65-75 ﹪, heating effect.
Step 13：Plug is heated using hot-air, fire door is opened when plug temperature reaches 80-110 DEG C and send plug
Go out.
The plug parameter of preheating is：Diameter of mandrel is 104.7mm~460.6mm, plug total length for 12500mm~
20000mm, plug length of work segment are the 62.5%~94.9% of plug total length.
When plug heating target temperature is 100 ± 10 DEG C, the lower effect for applying lubricant together can be made to reach optimal.
Plug heating maximum rate is 0.12 DEG C/s, to make plug temperature uniform, reaches preferable pre-heat effect, when straight
When footpath is less than 245.2mm, preheating time cannot be less than 25min；When diameter is not less than 245.2mm, preheating time cannot be less than
35min。
By the present invention apply Φ 180, Φ 159,460 units of Φ three core rod preheating furnaces on.180 unit plugs of Φ
The heat source of preheating is to be changed to by original electrical heating using the hot-air after core rod preheating furnace heating, the heat sources of 460 units of Φ by
Flue gas originally is changed to the hot-air after core rod preheating furnace heating, and 159 units of Φ are empty using the heat after core rod preheating furnace heating
Gas.
The data gathered under different plug hot-air preheating methods are as shown in table 1, and mandrel material is H13 in table, in table
Plug temperature is plug active section 4 points equidistant from head end to tail end.
The data of the different plug hot-air preheating example collections of table 1
It is as shown in table 2 that the data of (electric preheating, smoke pre-heating, hot-air preheating) plug are gathered under different preheating methods, table SMIC
Bar material is H13, and plug temperature is plug active section 4 points equidistant from head end to tail end in table.
Plug gathered data under the different preheating methods of table 2
By comparing Tables 1 and 2 it can be found that when preheating plug as heat source using hot-air, plug temperature is than more uniform, heating
Time is shorter.It can be seen from 159 unit plug pre-heat effects of Φ in table 1 when hot wind valve opening is 73%, plug table
For face temperature than more uniform, preheating time is shorter.
Claims (4)
1. a kind of pre-heating mean of core rod of seamless, including：
The hot-air system of core rod preheating furnace is connected with the heat exchanger placed in annular furnace, annular is recycled using the heat exchanger
Heat in stove flue gas, the hot-air after being heated in the heat exchanger is pre- using the hot-air system importing plug
Hot stove；
The hot blast temperature of the core rod preheating furnace is adjusted, fire box temperature is heated to design temperature；According to the stove of core rod preheating furnace
Interior temperature adjusts the open degree of hot-blast valve in the hot-air system, it is ensured that core rod preheating furnace furnace temperature is stablized, and hot air temperature is
350-450℃；
Plug is heated using hot-air, when the plug parameter of preheating is：Diameter of mandrel is 104.7mm~460.6mm, plug
Total length is 12500mm~20000mm, and plug length of work segment is the 62.5%~94.9% of plug total length；Plug heating is maximum
Speed is 0.12 DEG C/s, and when diameter is less than 245.2mm, preheating time cannot be less than 25min；When diameter is not less than 245.2mm
When, preheating time cannot be less than 35min, and fire door is opened when plug temperature reaches 80-110 DEG C and sends out plug.
2. the pre-heating mean of core rod of seamless as claimed in claim 1, it is characterised in that：The plug heating
Target temperature is 100 ± 10 DEG C.
3. the pre-heating mean of core rod of seamless as claimed in claim 1, it is characterised in that：The tune of supply air system
Section valve is symmetrical in the core rod preheating furnace both sides, and the aperture of the monosymmetric regulating valve is identical, same position in burner hearth
Two regulating valves put are an adjusting valve group, and the unlatching quantity root of valve group is adjusted described in the core rod preheating furnace
Determined according to the diameter of mandrel and length of work segment.
4. the pre-heating mean of core rod of seamless as claimed in claim 3, it is characterised in that：The adjusting valve group
Unlatching quantity be 15-22 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711154311.3A CN107941025A (en) | 2017-11-20 | 2017-11-20 | The pre-heating mean of core rod of seamless |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711154311.3A CN107941025A (en) | 2017-11-20 | 2017-11-20 | The pre-heating mean of core rod of seamless |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107941025A true CN107941025A (en) | 2018-04-20 |
Family
ID=61931936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711154311.3A Withdrawn CN107941025A (en) | 2017-11-20 | 2017-11-20 | The pre-heating mean of core rod of seamless |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107941025A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613546A (en) * | 2018-07-12 | 2018-10-02 | 江苏常宝普莱森钢管有限公司 | Plug attemperator and plug thermoregulating system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256821A (en) * | 2013-01-08 | 2013-08-21 | 内蒙古包钢钢联股份有限公司 | Method for preheating mandril of seamless steel tube rolling machine |
-
2017
- 2017-11-20 CN CN201711154311.3A patent/CN107941025A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256821A (en) * | 2013-01-08 | 2013-08-21 | 内蒙古包钢钢联股份有限公司 | Method for preheating mandril of seamless steel tube rolling machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613546A (en) * | 2018-07-12 | 2018-10-02 | 江苏常宝普莱森钢管有限公司 | Plug attemperator and plug thermoregulating system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180420 |
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| WW01 | Invention patent application withdrawn after publication |