CN113814275B - Method for heating area hot feeding and hot charging rate of lifting plate - Google Patents
Method for heating area hot feeding and hot charging rate of lifting plate Download PDFInfo
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- CN113814275B CN113814275B CN202111035591.2A CN202111035591A CN113814275B CN 113814275 B CN113814275 B CN 113814275B CN 202111035591 A CN202111035591 A CN 202111035591A CN 113814275 B CN113814275 B CN 113814275B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000005096 rolling process Methods 0.000 claims abstract description 36
- 230000033764 rhythmic process Effects 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000010079 rubber tapping Methods 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
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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
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/04—Lifting or lowering work for conveying purposes, e.g. tilting tables arranged immediately in front of or behind the pass
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/002—Piling, unpiling, unscrambling
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Abstract
The invention belongs to the technical field of steel rolling, and particularly relates to a method for lifting a hot charging rate of a plate heating area, which is used for timely adjusting hot blank logistics based on a plate blank warehouse, accurately positioning a hot blank stack position, promoting hot blanks to be timely stacked to a feeding stack position and shortening the residence time of the hot blanks in the plate blank warehouse; based on the matching analysis of the hot blank specification and the roller rolling specification, when more than 30% of hot blanks cannot be rolled in a furnace due to the problem of roller convexity, the rollers are replaced in time at the end of roller matching, so that the hot blanks can be rolled in the furnace normally; the heating process of the front-row planning furnace inner plate is adjusted, so that the furnace discharging rhythm of the furnace inner plate is improved, and the hot blank stack feeding area can be ensured to be charged in time; the improvement measures enable the hot blank hot filling rate to be further improved by 10%, and the method has good universality and extremely high popularization and application values.
Description
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to a method for lifting a hot charging rate of a plate heating area.
Background
The improvement of the hot feeding rate of the thick plate has obvious effects of energy saving and consumption reduction, and simultaneously can shorten the time of slab in a furnace, improve the rolling rhythm and reduce the production cost, so that the improvement of the hot feeding rate of the thick plate is always the direction of efforts of various large steel plants. However, for many years, the hot charging rate of thick plates (the proportion of slabs with the temperature of more than or equal to 400 ℃ in the total charged slabs) cannot be obviously improved all the time under the influence of various factors in each large steel factory, and the hot charging rate of the thick plate factory in China is basically below 50 percent.
The logistics process of the thick plate hot blank is shown in figure 1, the thick plate hot blank is sent to a thick plate from a steelmaking side, cut off lines of the thick plate II are sent to a plate blank warehouse, the thick plate hot blank is lifted to an over-collapse trolley through a travelling crane, the thick plate hot blank is transported to a feeding cross, finally the thick plate hot blank is lifted into a feeding roller way through a feeding travelling crane, and the thick plate hot blank is transported to a heating furnace through the feeding roller way to be charged. The secondary cutting (1 CS, 2 CS) means that after the mother blank sent by steelmaking is cut for the second time by a thick plate cutting machine, the mother blank is cut into sub-blanks meeting the requirements, and generally 1 mother blank can be cut into 2-3 sub-blanks; the slab warehouse is divided into three spans P, M, K, the three spans are arranged side by side, the P spans are mainly used for storing surplus materials, unplanned slabs and long slabs, the M spans are mainly used for storing two cut slabs in a short time, and the K spans are mainly used for storing planned slabs and slabs to be fed immediately. The travelling crane is used for stacking and preparing the slabs in the slab warehouse. The overstock trolley penetrates through the P, M, K three spans and is mainly used for conveying slabs in different spans. The feeding roller way is positioned in front of the heating furnace and is mainly used for conveying the plate blanks to the front of the furnace door of the heating furnace. The heating furnace is arranged at one side close to the K span.
The existing methods for improving the hot charging rate of the plate blank are as follows: the first way is as follows: CN201910690898.2, patent name: a method for improving hot charging rate of hot-feeding slab in iron and steel plant is recorded, the patent adopts the steps of feeding the slab into a heat preservation pit for heat preservation, reasonably arranging production plan, controlling the pit discharging rhythm of the hot slab according to the tapping rhythm, ensuring the temperature of the hot slab to be higher than 300 ℃, and further improving the hot charging rate of the hot slab; the second mode is as follows: CN201711194900.4, patent name: the patent describes a production process for reducing cracks of a steel plate rolled by a steel billet, which reduces the cracks on the surface of the plate blank, improves the quality of the hot blank and further improves the hot charging rate of the hot blank by modifying equipment and optimizing the production process of a continuous casting blank; the third is as follows: CN201610610322.7, patent name: the method is recorded by using a method for producing hot rolled oriented silicon steel by cross rolling of a heat preservation pit and a single heating furnace, and the method utilizes the special heat preservation pit for the silicon steel to preserve the silicon steel blank, buffer the mismatch between smelting and rolling rhythms, ensure that the silicon steel blank is not charged in a cold state, and reduce the rejection rate; the silicon steel blank and other steel blanks are adopted for unit cross rolling, so that rolling efficiency can be improved, and cost can be saved.
However, the conventional method for improving the hot blank hot charging rate still has the following problems, so that the hot blank hot charging rate is difficult to further improve.
(1) After the hot blanks are cut out, the hot blanks cannot be timely loaded into the heating furnace due to long stack-returning time in the slab warehouse, so that the temperature of the hot blanks is lost. In the actual production process, after the hot blanks are off line from the two tangent lines, the problems of untimely information communication, inaccurate stacking position information, uncertain material flow direction and the like cause temperature dissipation of the hot blank part after stack inversion due to long storage time, and the temperature of the hot blank is lower than 400 ℃ during furnace loading.
(2) After the hot blank is cut out, the convexity of the rolled steel plate is too large due to the problem of rolling specification, the charging is abandoned to ensure the rolling quality of the steel plate, and when the hot blank is not suitable for the matched rolling, if the hot blank is directly rolled, the convexity of the rolled steel plate is too large, so that batch quality accidents are caused.
(3) After the hot blank is cut out, in order to ensure the uniformity of heating temperature, the blank in the heating furnace is arranged in advance, the requirement on the time of the furnace is met, the discharging speed of the blank in the furnace is slow, the charging speed of the hot blank is slow, and the temperature of part of the hot blank is lost; in actual production, after hot billets are tapped, the front discharge plan is a cold billet steel, so that the variety steel has the requirement on the time of the furnace for ensuring the uniformity of the heating temperature, the tapping rhythm is slow, and the tapped hot billets cannot be charged in time after the variety steel is planned.
Disclosure of Invention
Aiming at the problems of the prior art, the invention aims to provide a method for lifting the hot charging rate of a plate heating area, which solves the problem that hot blanks cannot be charged in time due to the fact that the stack-returning time of a plate blank warehouse is long, the rolling specification of a roller is not matched with the specification of a steel plate, and the discharging rhythm of cold blank variety steel of a front-row plan is slow after the hot blanks are cut out, so that the hot charging rate of the hot blanks is improved.
Based on the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a method for lifting a heating area hot feeding rate of a plate, which comprises the following steps:
(1) Based on the stock quantity of the slab stock, accurately positioning the stack position of the hot blanks after the second cutting;
(2) Based on matching analysis of hot blank specifications and rolling specifications of rollers, determining whether roller replacement is needed in advance;
(3) Based on the adjustment of the tapping rhythm of the inner plate of the prior furnace, the subsequent hot blank is ensured to be charged in time.
Firstly, stock quantity information of a slab stock is timely obtained, and based on the stock quantity of the slab stock, the stack position of a hot blank is accurately positioned, so that the hot blank is timely stacked to a material stack position, the stacking time is shortened, and heat loss of the hot blank is avoided; secondly, the invention further counts the proportion of the hot blanks which cannot be matched with the existing matched roller in the hot blanks, and timely arranges roller replacement to avoid the problem that the hot blanks cannot be rolled in a furnace due to the convexity of the roller; in addition, the invention further shortens the furnace time of the furnace plate blank by adjusting the heating efficiency of the furnace plate blank, and ensures that the subsequent hot blank can be timely fed into the furnace.
The method provided by the invention has excellent universality, can further improve the hot blank hot charging rate by 10% on the basis of the prior art, and has extremely wide popularization and application values.
Further, the specific process of accurately positioning the stack position of the hot blank after the second cutting based on the stock quantity of the blank stock in the step (1) is as follows:
acquiring the stock quantity information of the slab stock, and adjusting the hot slab logistics direction to be as follows when the stock quantity of the slab stock is smaller than 1/2 of the maximum stock quantity of the slab stock: conveying the hot blanks to small spans of the M spans, closing the rest stack positions of the M spans, and conveying the hot blanks temporarily stacked by the small spans of the M spans to feeding stack positions of the K spans or directly lifting the hot blanks to a feeding roller way; if the stock quantity of the slab stock is more than or equal to 1/2 of the maximum stock quantity, the flow direction of the hot slab is adjusted as follows: and sequentially opening the stack positions of the M spans close to the small spans, closing the rest stack positions of the M spans, and sequentially conveying the hot blanks stacked on the small spans of the M spans and the adjacent stack positions to the feeding stack positions of the K spans or directly lifting the hot blanks to the feeding roller way.
According to the invention, based on stock quantity information of the slab warehouse, the conveying stack position of the hot blanks can be accurately positioned by opening the M span small spans and adjacent stack positions thereof in sequence, so that the stack searching time of the hot blanks is shortened, and the heat loss of the hot blanks is reduced.
Further, in order to timely acquire the stock information of the slab stock and accurately position the hot slab stack, the slab stock management operation chamber and the hot slab cutting operation chamber are combined into a plate-adding two-in-one operation chamber.
By adopting the mode of combining the operation chambers, the stack position information communication is carried out face to face, so that the information communication can be effectively ensured to be timely and smooth, the stack position information is ensured to be accurate, and the hot blank stack position can be timely and accurately positioned.
Further, the step (2) is based on matching analysis of hot blank specification and rolling specification of the roller, and the specific steps of determining whether the roller needs to be replaced in advance are as follows:
A. the number of hot blanks to be tapped is defined;
B. the number proportion of the hot blanks which are not matched with the rolling specification of the existing roller and cannot be rolled by the existing roller is determined;
C. when the quantity proportion of the hot blanks which cannot be rolled by the existing rollers exceeds 30%, the rollers are replaced in time at the end of roller matching, so that the hot blanks can be ensured to be rolled in a furnace normally.
According to the invention, the number of the hot blanks which cannot be rolled by the existing roller is timely obtained by carrying out matching analysis on the hot blank specification and the rolling specification of the existing roller, so that the roller is timely replaced, and the situation that the hot blanks are not suitable for the matched roller and the convexity of a rolled steel plate is too large to generate quality accidents is avoided.
Further, based on the adjustment of the tapping rhythm of the inner plate of the prior furnace, the specific method for ensuring the timely charging of the later hot blank is as follows:
determining hot blank tapping and charging time T; calculating the rolling completion time t of the prior furnace variety steel according to the current tapping rhythm; if T is less than T, the heating efficiency of the steel of the prior furnace variety is improved, the furnace time is shortened, and the later hot blank is ensured to be timely fed into the furnace.
Further, the furnace temperature of the prior furnace variety steel is increased by 1.7-10%, so that the heating efficiency is improved, and the furnace time of the hot blank in the furnace is shortened.
According to the invention, the furnace temperature of the prior furnace variety steel is raised, the heating efficiency is improved, the furnace time of the prior furnace variety steel is shortened, the heat loss during the waiting of the subsequent hot blank is avoided, the subsequent hot blank can be timely fed into the furnace, and the hot blank hot charging rate is improved.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, hot blank logistics are timely adjusted based on the stock of the blank stock, the hot blank stacking position is accurately positioned, the hot blanks are timely stacked to the feeding stacking position, and the residence time of the hot blanks in the blank stock is reduced; based on the matching analysis of the hot blank specification and the roller rolling specification, when more than 30% of hot blanks cannot be rolled in a furnace due to the problem of roller convexity, the rollers are replaced in time at the end of roller matching, so that the hot blanks can be rolled in the furnace normally; the heating process of the front-row planning furnace inner plate is adjusted, so that the furnace discharging rhythm of the furnace inner plate is improved, and the hot blank stack feeding area can be ensured to be charged in time; the improvement measures enable the hot blank hot filling rate to be further improved by 10%, and the method has good universality and extremely high popularization and application values.
Drawings
FIG. 1 is a schematic diagram of a prior art slab warehouse layout and hot slab flow direction;
fig. 2 is a schematic diagram of an optimized slab yard layout and hot slab flow direction.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples. It will be appreciated by persons skilled in the art that the specific embodiments described herein are for purposes of illustration only and are not intended to be limiting.
The test methods used in the examples are conventional methods unless otherwise specified; the materials, reagents and the like used, unless otherwise specified, are all commercially available.
The invention provides a method for lifting a heating area hot feeding rate of a plate, which has a process layout shown in figure 2 and comprises the following steps:
(1) And (3) accurately positioning the stack position of the hot blank after the second cutting based on the stock quantity of the blank stock.
According to the invention, the parts of the M span except the small span are blocked, and whether the rest stack positions of the M span are opened or not is selected according to the stock quantity of the slab, so that the accurate positioning of the stack positions of the hot blanks is facilitated, and the heat loss during the stack searching of the hot blanks is avoided.
Acquiring the stock quantity information of the slab stock, and adjusting the hot slab logistics direction to be as follows when the stock quantity of the slab stock is smaller than 1/2 of the maximum stock quantity of the slab stock: conveying the hot blanks to small spans of the M spans, closing the rest stack positions of the M spans, and conveying the hot blanks temporarily stacked by the small spans of the M spans to feeding stack positions of the K spans or directly lifting the hot blanks to a feeding roller way; if the stock quantity of the slab stock is more than or equal to 1/2 of the maximum stock quantity, the flow direction of the hot slab is adjusted as follows: and sequentially opening the stack positions of the M spans close to the small spans, closing the rest stack positions of the M spans, and sequentially conveying the hot blanks stacked on the small spans of the M spans and the adjacent stack positions to the feeding stack positions of the K spans or directly lifting the hot blanks to the feeding rollers.
According to the invention, based on stock quantity information of the slab warehouse, the conveying stacking position of the hot blanks can be accurately positioned in time by opening the M span small spans and adjacent stacking positions thereof in sequence, so that the hot blank stacking time is shortened, and the heat loss of the hot blanks is reduced.
In order to timely acquire the stock information of the slab stock, accurately positioning the hot slab stack position, combining the slab stock operation chamber and the hot slab operation chamber. By adopting the mode of combining the operation chambers, the stack position information communication is carried out face to face, so that the information communication can be effectively ensured to be timely and smooth, the stack position information is ensured to be accurate, and the accurate positioning of the hot blank stack position is facilitated.
(2) Based on the matching analysis of the hot blank specification and the rolling specification of the roller, whether the roller needs to be replaced in advance is determined.
A. The number of hot blanks to be tapped is defined;
B. the number proportion of the hot blanks which are not matched with the rolling specification of the existing roller and cannot be rolled by the existing roller is determined;
C. when the quantity proportion of the hot blanks which cannot be rolled by the existing rollers exceeds 30%, the rollers are replaced in time at the end of roller matching, so that the hot blanks can be ensured to be rolled in a furnace normally.
According to the invention, the number of the hot blanks which cannot be rolled by the existing roller is timely obtained by carrying out matching analysis on the hot blank specification and the rolling specification of the existing roller, so that the roller is timely replaced, and the situation that the hot blanks are not suitable for the matched roller and the convexity of a rolled steel plate is too large to generate quality accidents is avoided. The roll changing period is based on the principle of 'rigidity is the main part and flexibility is the auxiliary part', the roll changing period is not constant after being determined, and the roll changing time can be properly adjusted according to the number of hot blank tapping furnaces, the hot blank tapping amount and the hot blank rolling specification.
(3) Based on the adjustment of the tapping rhythm of the inner plate of the prior furnace, the subsequent hot blank is ensured to be charged in time.
And (3) pushing out a time node of the hot blank planned charging according to the hot blank tapping node, and if the pushed-out hot blank charging time node is in the state that the variety steel in the prior furnace is not discharged, reducing the time of the variety steel in the furnace by improving the heating process of the plate blank in the furnace, so as to ensure that the hot blank is timely charged in the furnace after the hot blank. The method comprises the following steps:
determining hot blank tapping and charging time T; calculating the rolling completion time t of the prior furnace variety steel according to the current tapping rhythm; if T is less than T, the heating efficiency of the prior furnace variety steel is improved, for example, the heating furnace temperature of the prior furnace variety steel is improved by 1.7-10%, so that the heating efficiency is improved, the furnace time is shortened, and the subsequent hot billets are ensured to be timely fed into the furnace.
The method provided by the invention has excellent universality, can further improve the hot blank hot charging rate by 10% on the basis of the prior art, and has extremely wide popularization and application values.
Example 1
The embodiment provides an example of accurately positioning a stack position of a hot blank, for example, after the hot blank is sent to a thick plate for cutting in a certain early shift, the old logistics route of the hot blank is as follows: m span small span stacking position, M span large span stacking position, and span trolley, K span feeding stacking position or feeding roller table (shown in figure 1), wherein after the stock quantity information of the slab warehouse is obtained and analyzed, the stock quantity of the slab warehouse is about 12000 tons and is less than 1/2 of the maximum stock quantity (30000 tons) of the slab warehouse, the slab is inverted according to a new logistics route, and the new logistics route is as follows: m span small span stacking position-span trolley-K span feeding stacking position or feeding roller way (shown in the following figure 2), namely, after the M span small span stacking position is directly used for stacking the trolley, the M span small span stacking position is conveyed to the K span feeding stacking position and is directly fed into a furnace, compared with an old logistics route, the residence time of a hot blank transported by a new logistics route in a warehouse is shortened by about 20 minutes, the furnace charging temperature of the hot blank is improved by 10-20 ℃, and the hot charging rate is improved by 2-5%.
Example 2
The embodiment provides an example for solving the problem of unmatched rolling specifications, for example, 30 days early hours of 3 months, because the rolling specifications of hot blanks after tapping are 12-20mm×3000mm×37000mm, and the total is 1800 tons, wherein the number of hot blanks unmatched with the old rolling specifications accounts for 43% of the total quantity of hot blanks, and the original planned roll change time is 14:00, considering that the hot blank rolling specification is not suitable for old matched roll rolling, and the roll changing time is adjusted to 8:40, the roll changing time is advanced by about 5 hours and 20 minutes, so that a batch of hot blanks are ensured to be smoothly fed into the furnace for rolling.
Example 3
The embodiment provides a solution example for the problem that the hot blank to be charged later cannot be charged in time because the rolling completion time of the steel of the prior furnace variety is later than the charging time of the hot blank to be charged later, for example, the planned charging time after the hot blank tapping is 23 after the hot blank tapping is performed on a night shift on a day: 20, and at this time the in-furnace breeder steel is predicted 23:35 rolling is completed, in order to ensure that hot billets can be smoothly fed into the furnace according to the nodes, the heating process of the variety steel is optimized in duty, as shown in table 1, the furnace temperature is increased by 1.7% -10%, and then the tapping rhythm of the variety steel is increased, and the method comprises the following steps of: 18 smoothly finish rolling the variety steel, ensure that the hot blank is not influenced by the tapping rhythm of the variety steel when the hot blank arrives at the heating furnace, can be rapidly charged, and ensure the charging temperature of the hot blank.
Table 1 optimizing table for heating process of variety steel
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (3)
1. A method for lifting a hot feed rate of a heated region of a plate, comprising the steps of:
(1) Based on the stock quantity of the slab stock, accurately positioning the stack position of the hot blanks after the second cutting;
the specific process for accurately positioning the stack position of the hot blank after the second cutting based on the stock quantity of the blank stock in the step (1) is as follows:
acquiring the stock quantity information of the slab stock, and adjusting the hot slab logistics direction to be as follows when the stock quantity of the slab stock is smaller than 1/2 of the maximum stock quantity of the slab stock: conveying the hot blanks to small spans of the M spans, closing the rest stack positions of the M spans, and conveying the hot blanks temporarily stacked by the small spans of the M spans to feeding stack positions of the K spans or directly lifting the hot blanks to a feeding roller way; if the stock quantity of the slab stock is more than or equal to 1/2 of the maximum stock quantity, the flow direction of the hot slab is adjusted as follows: sequentially opening the stack positions of the M spans close to the small spans, closing the rest stack positions of the M spans, and sequentially conveying the hot blanks stacked on the small spans of the M spans and the adjacent stack positions to the feeding stack positions of the K spans or directly lifting the hot blanks to the feeding roller way;
(2) Based on matching analysis of hot blank specifications and rolling specifications of rollers, determining whether roller replacement is needed in advance;
based on the matching analysis of the hot blank specification and the rolling specification of the roller, the specific steps of determining whether the roller needs to be replaced in advance are as follows:
A. the number of hot blanks to be tapped is defined;
B. the number proportion of the hot blanks which are not matched with the rolling specification of the existing roller and cannot be rolled by the existing roller is determined;
C. when the quantity proportion of the hot blanks which cannot be rolled by the existing rollers exceeds 30%, the rollers are replaced in time at the end stage of roller matching, so that the hot blanks can be normally rolled in a furnace;
(3) Based on the adjustment of the tapping rhythm of the inner plate of the prior furnace, the subsequent hot blank is ensured to be charged in time;
the specific method for ensuring the timely charging of the later hot blank based on the adjustment of the tapping rhythm of the inner plate of the prior furnace in the step (3) is as follows:
determining hot blank tapping and charging time T; calculating the rolling completion time t of the prior furnace variety steel according to the current tapping rhythm; if T is less than T, the heating efficiency of the steel of the prior furnace variety is improved, the furnace time is shortened, and the later hot blank is ensured to be timely fed into the furnace.
2. The method of claim 1, wherein for timely obtaining stock information of the slab stock, accurate positioning of the hot slab stack is performed by combining the slab stock management operation chamber and the hot slab cutting operation chamber into a combined slab and slab operation chamber.
3. The method according to claim 1, wherein the furnace time of the hot blank in the furnace is shortened by increasing the furnace temperature of the steel of the prior furnace variety by 1.7% -10% to improve the heating efficiency thereof.
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| CN108927412A (en) * | 2017-05-25 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of hot rolling slab stacking autocontrol method |
| CN112575175A (en) * | 2019-09-30 | 2021-03-30 | 宝钢湛江钢铁有限公司 | Slab warehouse and heating furnace layout for split charging of cold and hot slabs of thick plates and charging method |
| CN111187894A (en) * | 2020-01-20 | 2020-05-22 | 北京科技大学设计研究院有限公司 | Method for determining steel charging time and preventing hot-fed steel billet from damaging stokehole equipment |
| CN113290220A (en) * | 2021-05-11 | 2021-08-24 | 中国重型机械研究院股份公司 | Billet continuous casting machine ejection and hot delivery system |
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