CN107962070A - Eliminate the rolling mill practice of high-speed rod surface red rust - Google Patents
Eliminate the rolling mill practice of high-speed rod surface red rust Download PDFInfo
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- CN107962070A CN107962070A CN201711092402.9A CN201711092402A CN107962070A CN 107962070 A CN107962070 A CN 107962070A CN 201711092402 A CN201711092402 A CN 201711092402A CN 107962070 A CN107962070 A CN 107962070A
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- red rust
- water
- temperature
- rod surface
- rolling mill
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a kind of rolling mill practice for eliminating high-speed rod surface red rust, its technique is：（1）As fat content≤3.0mg/L in turbid circulating water, oil removing medicament is added according to 0.5~1g/L；As 3.0mg/L ＜ fat contents≤7.0mg/L in turbid circulating water, oil removing medicament is added according to 1~1.5g/L；As fat content ＞ 7.0mg/L in turbid circulating water, oil removing medicament is added according to 1.5~2g/L；（2）It is 870 ± 15 DEG C to control entry temperature at finishing, and control laying temperature is at 900 ± 20 DEG C；（3）Reverse blow wire surface.This technological operation is easy, high-speed rod surface red rust can be only controlled by adjusting means such as rolling line water cooling section water operation, raising repercussion purging pressure, adjustment laying temperatures in reduced levels, alleviate the dependence to water system water quality index.At the same time under the premise of mill lubrication effect is ensured, oil gas straying quatity is reduced, oil gas consumption can be effectively reduced, so as to reduce production cost.
Description
Technical field
The present invention relates to a kind of steel rolling method, especially a kind of rolling mill practice for eliminating high-speed rod surface red rust.
Background technology
Handan Iron and Steel Co heavy steel rolling mill introduces Italy pomini milling trains, using rub root rolled piece closed-loop control cooling system and this
Tai Ermo air-cooled lines.Cold-heading steel product is largely produced after operation, product performance index is excellent, but collects the wire rod table after retracting collection
One layer of red-brown powder shape rust is adhered in face, influences the performance indicator such as product appearance, severe exacerbation corrosion resistance of steel.Handan Iron and Steel Co
The main reason for high-speed rod surface red rust problem, the higher, laying temperature of mainly water system fat content formed sensitivity in red rust
Area etc..
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of good rolling work for eliminating high-speed rod surface red rust of effect
Skill.
In order to solve the above technical problems, the technical solution used in the present invention is：（1）When fat content in turbid circulating water≤
During 3.0mg/L, oil removing medicament is added according to 0.5~1g/L；As 3.0mg/L ＜ fat contents≤7.0mg/L in turbid circulating water, remove
Oily medicament is added according to 1~1.5g/L；As fat content ＞ 7.0mg/L in turbid circulating water, oil removing medicament adds according to 1.5~2g/L
Enter；
（2）It is 870 ± 15 DEG C to control entry temperature at finishing, and control laying temperature is at 900 ± 20 DEG C；
（3）Reverse blow wire surface.
The oil gas straying quatity of present invention control milling train, it is per minute for 0.8~1.5mL of lubricating oil.
Step of the present invention（2）In, control and subtract sizing inlet temperature as 880 ± 15 DEG C.
Step of the present invention（3）In, the gas pressure of purging is at least 0.6Mpa.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention is easy to operate, only by adjusting rolling line water
The means such as cold section of water operation, raising repercussion purging pressure, adjustment laying temperature, which can control high-speed rod surface red rust, exist
Reduced levels, alleviate the dependence to water system water quality index.At the same time under the premise of mill lubrication effect is ensured, oil gas spray is reduced
Enter amount, oil gas consumption can be effectively reduced, so as to reduce production cost.The present invention is realized in particular for cold-heading high-speed rod
Good high-speed rod surface quality under oil and gas lubricating condition, improves user to the first sense organ satisfaction of wire rod " appearance ".
Embodiment
The present invention will be further described in detail with reference to the specific embodiments.
The rolling mill practice of this elimination high-speed rod surface red rust is in order to farthest reduce water system fat content to height
The influence of fast wire surface red rust, using increasing fuel-displaced medicament addition in turbid ring pumping plant, improve rolling line repercussion purging pressure, excellent
The group technology for changing rolling line water volume in water tank proportioning farthest mitigates influence of the grease to surface red rust in water；Optimize at the same time cold
Upsetting high-speed rod laying temperature, avoids red rust and forms sensitive temperature.This technique is as described below：
（1）Control oil-gas lubricating oil gas straying quatity：Oil-air lubrication valve opening is adjusted, under the premise of mill lubrication effect is ensured,
Reduce oil gas straying quatity；Fuel feeding per minute 15 times, 0.8~1.5mL of fuel feeding per minute by taking 6.5mm specifications as an example.
（2）As fat content≤3.0mg/L in turbid circulating water, oil removing medicament is added according to 0.5~1g/L turbid circulating waters；When turbid
In ring water during 3.0mg/L ＜ fat contents≤7.0mg/L, oil removing medicament is added according to 1~1.5g/L turbid circulating waters；When in turbid circulating water
During fat content ＞ 7.0mg/L, oil removing medicament is added according to 1.5~2g/L turbid circulating waters；
（3）Control water cooling section mass area ratio：1,2 section of water tank intensity of cooling is controlled, cooling water inflow needs scene according into subtracting sizing
Temperature adjusts, and to reach 870 ± 15 DEG C of entry temperature at finishing of control, by controlling 3,4,5 sections of water cooling section waters, control subtracts sizing
Inlet temperature is preferably 880 ± 15 DEG C；Controlling 6,7 water volume in water tank at the same time, (cooling water inflow needs scene according to laying temperature tune
It is whole), reach control laying temperature at 900 ± 20 DEG C, so that reducing the rolling later stage is attached to fat content on steel piece surface, reach
To the influence degree for fundamentally reducing surface red rust.Because if oily content is higher in cooling water, water can be seriously reduced
Cooling capacity, promote the formation of wire surface red rust.This is because the oil in water can reduce the thermal conductivity of water, heat is hindered
Transmit, promote wire surface to form steam blanket, increase the reaction speed of wire surface metal and vapor, form red rust.
（4）Improve reverse blow air pressure：Using pressure-air reverse blow cooling water, reverse blow air pressure exists
At least 0.6Mpa.The effect of reverse air purge spray nozzle is to purge the water and attachment of wire surface, to ensure wire surface matter
Amount, if pressure is low, can cause wire rod to pass water rear surface band water, it is possible to promote surface to form steam blanket, increase surface metal
With the reaction speed of vapor, so as to form red rust.
（5）Adjustment spinning temperature：Laying temperature control as described above is at 900 ± 20 DEG C.In the case where cooling technique is constant,
Proved by a large amount of production practices, red rust is generally not likely to produce when laying temperature is high, red rust is also easy to produce when laying temperature is low.This says
It is bright to properly increase laying temperature, it can effectively reduce the generation of the red rust of wire surface.
By the technical controlling and process combination of process above measure, grease is alleviated in water to the shadow of wire surface red rust
Ring, and avoid red rust and form sensible factor, basic realize eliminates high-speed rod surface red rust；This method is applicable in all rub six generation of root
Milling train.
Embodiment 1：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the SWRCH22A cold-heading high-speed rods of Italian pomini milling trains production 6.5mm, the major alloy of wire rod
Component is（wt）：C 0.20%、Si 0.05%、Mn 0.95%、P 0.012%、S 0.006%、Als 0.031%.It is oily in turbid circulating water
Fat content 2.8mg/L, oil removing medicament are added according to 1.0g/L.In the operation of rolling：950~990 DEG C of start rolling temperature, finish rolling entrance temperature
860~880 DEG C of degree, subtract 880~892 DEG C of sizing inlet temperature, 900~913 DEG C of laying temperature；Lubricating oil fuel feeding per minute
0.95mL；Reverse blow air pressure is in 0.6Mpa.Any surface finish of SWRCH22A cold-heading high-speed rods obtained by the present embodiment,
Without red rust.
Embodiment 2：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the SWRCH22A cold-heading high-speed rods of Italian pomini milling trains production 6.5mm, the major alloy of wire rod
Component is（wt）：C 0.21%、Si 0.05%、Mn 0.94%、P 0.011%、S 0.005%、Als 0.032%.It is oily in turbid circulating water
Fat content 4.6mg/L, oil removing medicament are added according to 1.2g/L.In the operation of rolling：950~990 DEG C of start rolling temperature, finish rolling entrance temperature
855~870 DEG C of degree, subtract 865~880 DEG C of sizing inlet temperature, 880~890 DEG C of laying temperature；Lubricating oil fuel feeding per minute
0.9mL；Reverse blow air pressure is in 0.6Mpa.Any surface finish of SWRCH22A cold-heading high-speed rods obtained by the present embodiment,
Without red rust.
Embodiment 3：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the SWRCH22A cold-heading high-speed rods of Italian pomini milling trains production 6.5mm, the major alloy of wire rod
Component is（wt）：C 0.20%、Si 0.04%、Mn 0.97%、P 0.010%、S 0.006%、Als 0.029%.It is oily in turbid circulating water
Fat content 7.5mg/L, oil removing medicament are added according to 1.7g/L.In the operation of rolling：950~990 DEG C of start rolling temperature, finish rolling entrance temperature
870~885 DEG C of degree, subtract 880~895 DEG C of sizing inlet temperature, 905~920 DEG C of laying temperature；Lubricating oil fuel feeding per minute
1.2mL；Reverse blow air pressure is in 0.7Mpa.Any surface finish of SWRCH22A cold-heading high-speed rods obtained by the present embodiment,
Without red rust.
Embodiment 4：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the SWRCH15A cold-heading high-speed rods of Italian pomini milling trains production 12mm, the major alloy of wire rod into
It is divided into（wt）：C 0.15%、Si 0.06%、Mn 0.40%、P 0.013%、S 0.004%、Als 0.036%.Grease in turbid circulating water
Content 2.2mg/L, oil removing medicament are added according to 0.5g/L.In the operation of rolling：952~994 DEG C of start rolling temperature, entry temperature at finishing
875~882 DEG C, subtract 880~891 DEG C of sizing inlet temperature, 900~915 DEG C of laying temperature；Lubricating oil fuel feeding per minute
1.15mL；Reverse blow air pressure is in 0.6Mpa.Any surface finish of SWRCH15A cold-heading high-speed rods obtained by the present embodiment,
Without red rust.
Embodiment 5：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the SWRCH15A cold-heading high-speed rods of Italian pomini milling trains production 12mm, the major alloy of wire rod into
It is divided into（wt）：C 0.16%、Si 0.06%、Mn 0.42%、P 0.012%、S 0.004%、Als 0.035%.Grease in turbid circulating water
Content 7.0mg/L, oil removing medicament are added according to 1.5g/L.In the operation of rolling：950~995 DEG C of start rolling temperature, entry temperature at finishing
870~885 DEG C, subtract 880~890 DEG C of sizing inlet temperature, 900~910 DEG C of laying temperature；Lubricating oil fuel feeding 1.4mL per minute；
Reverse blow air pressure is in 0.6Mpa.Any surface finish of SWRCH15A cold-heading high-speed rods, no red rust obtained by the present embodiment.
Embodiment 6：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the SWRCH15A cold-heading high-speed rods of Italian pomini milling trains production 12mm, the major alloy of wire rod into
It is divided into（wt）：C 0.15%、Si 0.05%、Mn 0.38%、P 0.011%、S 0.005%、Als 0.037%.Grease in turbid circulating water
Content 8.2mg/L, oil removing medicament are added according to 2.0g/L.In the operation of rolling：950~995 DEG C of start rolling temperature, entry temperature at finishing
865~880 DEG C, subtract 875~885 DEG C of sizing inlet temperature, 910~920 DEG C of laying temperature；Lubricating oil fuel feeding 0.8mL per minute；
Reverse blow air pressure is in 0.8Mpa.Any surface finish of SWRCH15A cold-heading high-speed rods, no red rust obtained by the present embodiment.
Embodiment 7：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the DM08 cold-heading high-speed rods of Italian pomini milling trains production 20mm, the primary alloy constituent of wire rod is
（wt）：C 0.07%、Si 0.08%、Mn 0.35%、P 0.012%、S 0.006%、Als 0.010%.Fat content in turbid circulating water
3.0mg/L, oil removing medicament are added according to 0.8g/L.In the operation of rolling：950~990 DEG C of start rolling temperature, entry temperature at finishing 870
~885 DEG C, subtract 880~894 DEG C of sizing inlet temperature, 900~918 DEG C of laying temperature；Lubricating oil fuel feeding 1.3mL per minute；Instead
To sweep air pressure in 0.6Mpa.Any surface finish of DM08 cold-heading high-speed rods, no red rust obtained by the present embodiment.
Embodiment 8：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the DM08 cold-heading high-speed rods of Italian pomini milling trains production 20mm, the primary alloy constituent of wire rod is
（wt）：C 0.07%、Si 0.09%、Mn 0.34%、P 0.010%、S 0.006%、Als 0.011%.Fat content in turbid circulating water
3.2mg/L, oil removing medicament are added according to 1.0g/L.In the operation of rolling：950~990 DEG C of start rolling temperature, entry temperature at finishing 865
~880 DEG C, subtract 870~880 DEG C of sizing inlet temperature, 890~900 DEG C of laying temperature；Lubricating oil fuel feeding 1.0mL per minute；Instead
To sweep air pressure in 0.7Mpa.Any surface finish of DM08 cold-heading high-speed rods, no red rust obtained by the present embodiment.
Embodiment 9：The rolling mill practice of this elimination high-speed rod surface red rust is described in detail below.
Using the DM08 cold-heading high-speed rods of Italian pomini milling trains production 20mm, the primary alloy constituent of wire rod is
（wt）：C 0.08%、Si 0.08%、Mn 0.35%、P 0.012%、S 0.005%、Als 0.009%.Fat content in turbid circulating water
7.1mg/L, oil removing medicament are added according to 1.5g/L.In the operation of rolling：950~990 DEG C of start rolling temperature, entry temperature at finishing 860
~875 DEG C, subtract 880~890 DEG C of sizing inlet temperature, 895~905 DEG C of laying temperature；Lubricating oil fuel feeding 1.5mL per minute；Instead
To sweep air pressure in 0.65Mpa.Any surface finish of DM08 cold-heading high-speed rods, no red rust obtained by the present embodiment.
Use statistics：When Handan Iron and Steel Co heavy steel rolling mill uses original technique rolled wire, 9~December in 2016 rolls 1150 altogether
Batch, wherein, 895 batches have serious surface red rust, 106 batches to have a small amount of surface red rust, 149 batches without surface red rust.
1~March in 2017 rolls 1245 batches altogether using this technique, wherein, 16 batches have serious surface red rust（Water process, process
Technological fluctuation）, 83 batches have a small amount of surface red rust, 1146 batches without surface red rust.It can be seen from the above that this technique can effectively be kept away
Exempt from high-speed rod and surface red rust occur.
Claims (4)
1. a kind of rolling mill practice for eliminating high-speed rod surface red rust, it is characterised in that its technique is：（1）When oily in turbid circulating water
During fat content≤3.0mg/L, oil removing medicament is added according to 0.5~1g/L；When 3.0mg/L ＜ fat contents in turbid circulating water≤
During 7.0mg/L, oil removing medicament is added according to 1~1.5g/L；As fat content ＞ 7.0mg/L in turbid circulating water, oil removing medicament is pressed
Added according to 1.5~2g/L；
（2）It is 870 ± 15 DEG C to control entry temperature at finishing, and control laying temperature is at 900 ± 20 DEG C；
（3）Reverse blow wire surface.
2. the rolling mill practice according to claim 1 for eliminating high-speed rod surface red rust, it is characterised in that：Control milling train
Oil gas straying quatity, it is per minute for 0.8~1.5mL of lubricating oil.
3. the rolling mill practice according to claim 1 for eliminating high-speed rod surface red rust, it is characterised in that：The step
（2）In, control and subtract sizing inlet temperature as 880 ± 15 DEG C.
4. the rolling mill practice for eliminating high-speed rod surface red rust according to claim 1,2 or 3, it is characterised in that：It is described
Step（3）In, the gas pressure of purging is at least 0.6Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711092402.9A CN107962070A (en) | 2017-11-08 | 2017-11-08 | Eliminate the rolling mill practice of high-speed rod surface red rust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711092402.9A CN107962070A (en) | 2017-11-08 | 2017-11-08 | Eliminate the rolling mill practice of high-speed rod surface red rust |
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| CN107962070A true CN107962070A (en) | 2018-04-27 |
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| CN201711092402.9A Withdrawn CN107962070A (en) | 2017-11-08 | 2017-11-08 | Eliminate the rolling mill practice of high-speed rod surface red rust |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114558895A (en) * | 2022-03-07 | 2022-05-31 | 中天钢铁集团(南通)有限公司 | High-speed wire-wrapping type regulation control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108396A (en) * | 2007-09-06 | 2008-01-23 | 鞍钢股份有限公司 | Method for controlling red rust on hot rolling surface of high-speed wire rod |
| CN101935110A (en) * | 2010-08-26 | 2011-01-05 | 北京首钢国际工程技术有限公司 | Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant |
-
2017
- 2017-11-08 CN CN201711092402.9A patent/CN107962070A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108396A (en) * | 2007-09-06 | 2008-01-23 | 鞍钢股份有限公司 | Method for controlling red rust on hot rolling surface of high-speed wire rod |
| CN101935110A (en) * | 2010-08-26 | 2011-01-05 | 北京首钢国际工程技术有限公司 | Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant |
Non-Patent Citations (1)
| Title |
|---|
| 杜义等: "高速线材表面红锈的形成及控制", 《轧钢》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114558895A (en) * | 2022-03-07 | 2022-05-31 | 中天钢铁集团(南通)有限公司 | High-speed wire-wrapping type regulation control method |
| CN114558895B (en) * | 2022-03-07 | 2023-04-18 | 中天钢铁集团(南通)有限公司 | High-speed wire packet type regulation control method |
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Application publication date: 20180427 |