CN211990254U - Energy-saving device for producing long steel by calendering smelting waste heat - Google Patents
Energy-saving device for producing long steel by calendering smelting waste heat Download PDFInfo
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- CN211990254U CN211990254U CN202020053069.1U CN202020053069U CN211990254U CN 211990254 U CN211990254 U CN 211990254U CN 202020053069 U CN202020053069 U CN 202020053069U CN 211990254 U CN211990254 U CN 211990254U
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Abstract
The utility model relates to a steel material calendering production field discloses an utilize economizer of smelting waste heat calendering production elongated steel, contains multithread continuous casting machine, multithread roller end tunnel cave, roller end sideslip machine, dispatch roll table and shift fork, directly rolls the roll table, directly rolls the machine of rejecting waste, heat send roll table, casting blank straightening machine, heat to send machine of rejecting waste, casting blank heating furnace, calender. After a multi-strand casting blank produced by the continuous casting machine passes through a multi-strand roller bottom tunnel kiln and a roller bottom traversing machine, the multi-strand casting blank is kept in a hot state and is dispatched and conveyed by a dispatching roller way and a shifting fork, the multi-strand casting blank can be continuously and directly sent into a calender through a direct rolling roller way, and can also be continuously sent into a casting blank heating furnace after passing through a hot sending roller way and a casting blank straightening machine, and then enters the calender after traversing and heating. The functions of utilizing smelting waste heat, low energy consumption and heat supplement of casting blanks and entering a calender by various routes are realized. Compared with the traditional production process, the process has the advantages that the steel billets produced by the continuous casting machine are collected through the roller bottom cross sliding machine and enter the casting blank heating furnace after being cooled, and the energy consumption is greatly reduced.
Description
Technical Field
The utility model belongs to steel and iron material calendering production field, concretely relates to utilize and smelt economizer of waste heat calendering production elongated steel, applicable multiple production requirement.
Background
At present, when long steel products, such as bar wire and section bar, are produced, the production method from liquid molten steel to rolled steel products comprises the following steps: smelting produced liquid molten steel, feeding the liquid molten steel into a multi-strand continuous casting machine to continuously produce multi-strand solid high-temperature casting blanks, cutting off the high-temperature casting blanks, collecting the high-temperature casting blanks off line from a cooling bed of the continuous casting machine, cooling or thermally feeding the high-temperature casting blanks into a rolling workshop, feeding the high-temperature casting blanks into a heating furnace for secondary heating, and feeding the heated casting blanks into rolling equipment one by one for rolling.
In the traditional production method, after a casting blank is sent into a calendering workshop, the temperature of the steel blank is low, the temperature difference between the head and the tail is large, the requirement of calendering production cannot be met, secondary heating is carried out through a heating furnace, the heating time of the heating furnace is generally more than 1 hour, a large amount of energy is consumed, the production cost and waste gas emission are increased, the oxidation burning loss of the casting blank in the heating process can be caused, and the material waste is caused. And the waste heat of the casting blank during smelting is not effectively utilized, so that the best energy-saving effect is not achieved.
When different long steel products are rolled and produced, different requirements are provided for the length, the temperature and the head-tail temperature difference of a casting blank in a heating state, and the process of a heating furnace is continuously adjusted according to different requirements in production so as to meet the production requirements of economy and flexible scheduling, so that a new energy-saving device and method are needed to be developed, the smelting waste heat of the casting blank is fully utilized, and the long steel products are rolled and produced in an energy-saving and flexible mode.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problem, the utility model provides an utilize and smelt economizer of waste heat calendering production elongated steel, except but make full use of casting blank smelting waste heat, when can also compromise the calendering production, to different casting blank length, temperature, the requirement of end to end temperature difference, nimble adjustment production technology, reduction in production cost reduces the use restriction, enlarges application.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
An energy-saving device for producing long steel by calendering by utilizing smelting waste heat comprises a multi-strand continuous casting machine, a multi-strand tunnel kiln at the bottom of a roller, a transverse moving machine at the bottom of the roller, a dispatching roller way, a shifting fork, a direct rolling roller way, a direct rolling waste removing machine, a hot conveying roller way, a casting blank straightening machine, a hot conveying waste removing machine, a casting blank heating furnace and a calender;
the multi-stream roller bottom tunnel kiln, the roller bottom traversing machine, the dispatching roller way and the shifting fork are sequentially connected, the dispatching roller way and the shifting fork divide the roller way into two strands, one strand is sequentially connected with the direct rolling roller way, the direct rolling waste removing machine and the calender, the other strand is sequentially connected with the hot conveying roller way, the casting blank straightening machine, the hot conveying waste removing machine and the casting blank heating furnace, and the casting blank heating furnace is connected with the calender to form a set of calendering production line; the multi-strand continuous casting machine is connected with the multi-strand roller bottom tunnel kiln;
the multi-strand roller bottom tunnel kiln is arranged between a multi-strand continuous casting machine and a roller bottom traversing machine, and each casting blank is provided with an independent set which can only accommodate 1 casting blank to pass through; a conveying roller way is arranged in the multi-flow roller bottom tunnel kiln, and a channel cover made of a heat insulation material is arranged outside the multi-flow roller bottom tunnel kiln;
the roller bottom cross sliding machine is a plurality of groups of roller ways and is provided with a movable baffle; conveying the casting blank to move to a subsequent dispatching roller way, stopping the casting blank on a roller bottom traversing machine through starting and stopping or the action of a movable baffle plate, collecting the casting blank through a traversing mechanism, and moving the casting blank out of a production line from the side;
the dispatching roller way and the shifting fork are divided into two roller way groups with gradually narrowed widths, and baffles are arranged on two sides of the roller ways; the shifting fork swings between the two roller ways; the billet steel conveyed in the multi-flow direction can be guided to a straight rolling roller way or a hot conveying roller way with single flow width for conveying through baffles on two sides of the roller way; the shifting fork stops at different positions, and then the shifting fork and the fixed baffle plate can form contraction channels with different directions, so that the steel billets on the dispatching roller way are guided and conveyed to roller ways with different single flow widths, such as the direction of a straight rolling roller way or the direction of a hot conveying roller way;
the multi-strand continuous casting machine, the multi-strand roller bottom tunnel kiln, the roller bottom traversing machine, the dispatching roller way, the shifting fork, the direct rolling roller way, the direct rolling waste removing machine, the hot conveying roller way, the casting blank straightening machine, the hot conveying waste removing machine and the calender are all designed in a longitudinal flow mode; the casting blank heating furnace is designed in a transverse flow mode.
The straight rolling roller way is connected with the scheduling roller way and the calender and can convey a single continuous casting billet to the calender;
the direct rolling waste removing machine is a traditional device which can selectively move billets conveyed on a direct rolling roller way out of a lateral rack to be stacked through a transverse moving mechanism after being selectively blocked by a movable baffle plate, so that unqualified billets can be selectively moved out of the direct rolling roller way to the next rack to be temporarily stored and are not conveyed to a calender;
the hot conveying roller way is connected with the dispatching roller way and the casting blank heating furnace and can convey a single continuous casting blank to a steel inlet of the casting blank heating furnace, so that the single continuous casting blank enters the casting blank heating furnace for heating;
the casting blank straightener is arranged on the hot conveying roller way and is provided with a plurality of laterally guided rotating rollers, when a bent hot casting blank passes through the straightener, the hot casting blank can be straightened into a relatively straight state by the rotating rollers of the casting blank straightener in the pinch guiding process, and the straightness meeting the requirements is ensured to be achieved when the hot casting blank subsequently enters a casting blank heating furnace;
the hot conveying waste removing machine can selectively move billets conveyed on a hot conveying roller way out of a traditional device stacked on a side rack through a transverse moving mechanism after being blocked by a movable baffle, so that unqualified billets can be selectively moved out of the hot conveying roller way onto the side rack for temporary storage, and the unqualified billets are not conveyed to a casting blank heating furnace;
the casting blank heating furnace is used for horizontally moving the casting blank sent from the hot conveying roller way to the front of the calender in the furnace, heating or homogenizing the temperature of the casting blank in the furnace, and then moving the casting blank out of the casting blank heating furnace to enter the calender;
the multi-flow thermal-state casting blank produced by the multi-flow continuous casting machine passes through a multi-flow roller bottom tunnel kiln, and is kept in a thermal state to be dispatched and conveyed by a dispatching roller way and a shifting fork after traversing the roller bottom, so that the single hot-state casting blank can be directly conveyed into a casting mill through a direct rolling roller way and can also be conveyed into a casting blank heating furnace after continuously passing through a hot conveying roller way and a casting blank straightening machine, and then the single hot-state casting blank enters the casting mill after traversing and heating. The functions of utilizing smelting waste heat, supplementing heat with low energy consumption of casting blanks and entering a calender by various routes are realized. Compared with the traditional production, the billet produced by the multi-strand continuous casting machine needs to be collected by the roller bottom traversing machine, and enters the casting blank heating furnace for secondary heating after being cooled, so that the heating energy consumption is greatly reduced.
Further the multi-strand roller bottom tunnel kiln is arranged in the whole range from the multi-strand continuous casting machine to the roller bottom cross sliding machine or one or more sections of the multi-strand roller bottom tunnel kiln; the channel cover is formed by combining a lower cover and an upper cover or only has the lower cover.
And furthermore, a plurality of heaters are arranged inside the channel cover of the multi-flow roller-bottom tunnel kiln. The heating of the strand passing through the interior is selected such that the strand obtains an increase in temperature.
Further, the heater adopts one of combustion heat supply, electromagnetic induction heat supply and resistance heat supply.
And furthermore, a plurality of casting blank position detection and casting blank temperature detection devices are arranged in the multi-stream roller bottom tunnel kiln. The position and the temperature of the casting blank can be detected.
And further, the shifting fork swings by taking a branching point of the roller ways as a fixed shaft or moves between the two roller ways in parallel. The shift fork stops in different positions, and the direction passageway that can form both can all lead subsequent directly rolling roll table or hot roll table with the multithread continuous casting billet on, also can realize that few flows in the multithread continuous casting billet are led to directly rolling the roll table through stopping in different intermediate positions, and few flows are led to on the hot roll table in addition. The swinging and rotating action of the shifting fork can also realize the function of guiding and fixing through linear movement or other modes.
Further, the straight rolling roller way and the hot conveying roller way are provided with heat preservation covers or wind shields. The conveying casting blanks are shielded, and the heat loss in the conveying process is reduced.
And further connecting a single multi-strand continuous casting machine with a single set of rolling production line, or connecting a plurality of multi-strand continuous casting machines with the single set of rolling production line, or connecting the single multi-strand continuous casting machine with a plurality of sets of rolling production lines, or connecting the plurality of multi-strand continuous casting machines with the plurality of sets of rolling production lines.
Has the advantages that: compared with the prior art, the utility model has the advantages of:
1) for steel rolling materials with low requirements on temperature and uniformity, the rolling production is realized by utilizing the metallurgical waste heat of a casting blank through the online heat compensation of a multi-stream roller bottom tunnel kiln and the conveying of a direct rolling roller way. Because the production can not use a heating furnace, and the energy consumption of the roller-hearth tunnel kiln is greatly less than that of the heating furnace, the production cost is greatly reduced, and the pollutant emission is also reduced by saving the fuel consumption;
2) for steel rolling materials with higher requirements on temperature and uniformity, metallurgical waste heat of a casting blank is utilized, the casting blank is conveyed by a heat-preservation conveying function and a hot conveying roller way of a multi-stream roller bottom tunnel kiln, the casting blank enters a heating furnace at a higher speed for heat compensation and uniform temperature, and because the temperature of the casting blank entering the heating furnace is far higher than the temperature of the casting blank entering the furnace in the traditional process, the combustion efficiency consumption of the heating furnace is reduced, and the production cost and the pollutant emission are reduced;
3) when the continuous rolling production is required, two different production modes are switched, so that the continuous production of the calender is still maintained when the continuous casting machine is stopped for a short time, the continuous production of the calendering production is realized, and the production efficiency is improved;
4) the flexible switching of two different production modes and the complete casting blank transverse moving offline treatment equipment are adopted in various faults, so that the connection between a continuous casting machine and a calendering production line is flexible and reliable, the connection is smoother and faster than the traditional connection process, and the production efficiency is improved.
Drawings
FIG. 1 is a plan view of an embodiment of an energy saving device for producing long steel by calendering with smelting waste heat of the present invention;
the method comprises the following steps of 1, a multi-strand continuous casting machine, 2, a multi-strand roller bottom tunnel kiln, 3, a roller bottom traversing machine, 4, a dispatching roller way and a shifting fork, 5, a straight rolling roller way, 6, a straight rolling waste removing machine, 7, a calender, 8, a hot conveying roller way, 9, a casting blank straightening machine, 10, a hot conveying waste removing machine and 11, a casting blank heating furnace.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The raw materials used by the utility model are commercially available products.
Example 1
As shown in figure 1, the novel energy-saving device for producing long steel by calendering by utilizing smelting waste heat comprises a multi-strand continuous casting machine 1, a multi-strand roller bottom tunnel kiln 2, a roller bottom traversing machine 3, a dispatching roller way and a shifting fork 4, a direct rolling roller way 5, a direct rolling waste removing machine 6, a hot conveying roller way 8, a casting blank straightening machine 9, a hot conveying waste removing machine 10, a casting blank heating furnace 11 and a calender 7. The multi-strand continuous casting machine 1 is connected with a multi-strand roller bottom tunnel kiln 2; the multi-stream roller bottom tunnel kiln 2, the roller bottom traversing machine 3, the dispatching roller way and the shifting fork 4 are connected in sequence; the dispatching roller way and the shifting fork 4 divide the roller way into two strands, one strand of which is sequentially connected with a direct rolling roller way 5, a direct rolling waste removing machine 6 and a rolling mill 7, the other strand of which is sequentially connected with a hot conveying roller way 8, a casting blank straightening machine 9, a hot conveying waste removing machine 10 and a casting blank heating furnace 11, and the casting blank heating furnace 11 is further connected with the rolling mill 7 to form a set of rolling production line.
The multi-strand roller bottom tunnel kiln 2 is arranged in the whole range from the rear of a casting blank shearing machine of the multi-strand continuous casting machine 1 to the roller bottom traversing machine 3, and each strand of casting blank is provided with an independent set which can only accommodate 1 strand of casting blank to pass through. The four sides of the conveying roller way in the multi-flow roller-bottom tunnel kiln 2 are in a channel cover form sealed by heat-insulating materials, the channel cover is divided into an upper part and a lower part, the upper part and the lower part are combined, and the upper cover can be lifted and separated, so that the maintenance and the operation are convenient. A plurality of burners are arranged in the multi-stream roller-hearth tunnel kiln 2, and the casting blank passing through the interior is heated by adopting propane/pure oxygen as fuel, so that the temperature of the casting blank is increased or is uniform. And a plurality of casting blank position detection and casting blank temperature detection devices are arranged in the multi-stream roller bottom tunnel kiln 2, so that the position and the temperature of a casting blank can be detected.
The roller bottom traversing machine 3 is provided with a plurality of groups of roller ways and movable baffles, can convey casting blanks to move to subsequent dispatching roller ways and shifting forks 4, can stop the casting blanks on the roller bottom traversing machine 3 through starting and stopping or the action of the movable baffles, collects the casting blanks through a traversing mechanism, and moves out of a production line from the side.
The dispatching roller way and the shifting fork 4 divide the roller way into two strands, the dispatching roller way is a roller way group with gradually narrowed width, and billets conveyed in the multi-flow direction can be guided to the straight rolling roller way 5 with single flow width or the hot conveying roller way 8 for conveying through the baffles on the two sides of the roller way. The shifting fork is a baffle capable of swinging around the fixed shaft, the fixed shaft is positioned at a bifurcation point of the roller way, and the shifting fork swings to different positions to form contraction channels with different directions with the fixed baffle, so that steel billets on the dispatching roller way are guided and conveyed to roller ways with different single flow widths, and the steel billets can be guided to the direction of a straight rolling roller way 5 or the direction of a hot conveying roller way 8 in the example.
The front of the straight rolling roller bed 5 is connected with a scheduling roller bed, and the rear of the straight rolling roller bed is connected with a calender 7 through a straight rolling waste removing machine 6, so that a single continuous casting billet can be conveyed to the calender 7; the straight rolling waste removing machine 6 is a traditional device which can selectively stop the casting blank conveyed on the straight rolling roller way 5 through a movable baffle plate, and then move the billet on the roller way out to the rack on the side through a transverse moving mechanism, so that the unqualified billet can be selectively moved out to the rack beside the straight rolling roller way 5 for temporary storage, and the unqualified billet is not sent to the calender 7.
The hot conveying roller way 8 is connected with the dispatching roller way 4 in front and then connected with the casting blank heating furnace 11 through the casting blank straightening machine 9 and the hot conveying waste removing machine 10, and a single continuous casting blank can be conveyed to a steel inlet of the casting blank heating furnace 11, so that the single continuous casting blank enters the casting blank heating furnace 11 to be heated.
The casting blank straightener 9 is provided with a plurality of laterally guided rotating rollers, when the bent hot casting blank passes through the casting blank straightener 9, the hot casting blank can be straightened into a relatively straight state by the rotating rollers of the casting blank straightener 9 in the pinch guiding process, and the straightness meeting the requirements is ensured to be achieved when the hot casting blank subsequently enters the casting blank heating furnace 11.
The hot conveying waste removing machine 10 is a traditional device which can selectively move the casting blank conveyed by the casting blank straightening machine 9 out of the lateral rack to be stacked through a transverse moving mechanism after being blocked by a movable baffle plate, so that unqualified blanks are selectively moved out of the hot conveying roller way 8 to the nearby rack to be temporarily stored and are not conveyed to the casting blank heating furnace 11.
The casting blank heating furnace 11 is used for horizontally moving the casting blank sent from the hot roller conveying table 8 in the furnace before the rolling mill 7, heating or homogenizing the temperature of the casting blank in the furnace, and then the casting blank is discharged from the casting blank heating furnace 11 and enters the rolling mill 7 for production.
Example 2
A novel energy-saving device for producing long steel by calendering by utilizing smelting waste heat comprises a multi-strand continuous casting machine 1, a multi-strand roller bottom tunnel kiln 2, a roller bottom traversing machine 3, a dispatching roller way and shifting fork 4, a direct rolling roller way 5, a direct rolling waste removing machine 6, a hot conveying roller way 8, a casting blank straightening machine 9, a hot conveying waste removing machine 10, a casting blank heating furnace 11 and a calender 7. The multi-strand continuous casting machine 1 is connected with a multi-strand roller bottom tunnel kiln 2; the multi-stream roller bottom tunnel kiln 2, the roller bottom traversing machine 3, the dispatching roller way and the shifting fork 4 are connected in sequence; the dispatching roller way and the shifting fork 4 divide the roller way into two strands, one strand of which is sequentially connected with a direct rolling roller way 5, a direct rolling waste removing machine 6 and a rolling mill 7, the other strand of which is sequentially connected with a hot conveying roller way 8, a casting blank straightening machine 9, a hot conveying waste removing machine 10 and a casting blank heating furnace 11, and the casting blank heating furnace 11 is further connected with the rolling mill 7 to form a set of rolling production line.
The multi-strand roller bottom tunnel kiln 2 is arranged at a section between the rear part of a casting blank shearing machine of the multi-strand continuous casting machine 1 and the roller bottom cross moving machine 3 and close to the roller bottom cross moving machine 3, and each strand of casting blank is provided with an independent set and can only accommodate 1 strand of casting blank to pass through. Three surfaces of the conveying roller way arranged in the multi-flow roller-bottom tunnel kiln 2 are in a channel cover form sealed by heat-insulating materials, and the channel cover is a lower cover without a top cover, so that the maintenance and the operation are convenient. A plurality of heaters are arranged in the multi-stream roller bottom tunnel kiln 2, and electromagnetic induction heating is adopted to heat the casting blank passing through the inner part, so that the temperature of the casting blank is increased or is uniform. And a plurality of casting blank position detection and casting blank temperature detection devices are arranged in the multi-stream roller bottom tunnel kiln 2, so that the position and the temperature of a casting blank can be detected.
The roller bottom traversing machine 3 is provided with a plurality of groups of roller ways and movable baffles, can convey casting blanks to move to subsequent dispatching roller ways and shifting forks 4, can stop the casting blanks on the roller bottom traversing machine 3 through starting and stopping or the action of the movable baffles, collects the casting blanks through a traversing mechanism, and moves out of a production line from the side.
The dispatching roller way and the shifting fork 4 divide the roller way into two strands, the dispatching roller way is a roller way group with gradually narrowed width, and billets conveyed in the multi-flow direction can be guided to the straight rolling roller way 5 with single flow width or the hot conveying roller way 8 for conveying through the baffles on the two sides of the roller way. The shifting fork is a baffle which moves between the two roller ways in parallel, and the shifting fork can form contraction passages with different directions with the fixed baffle when moving to different positions, so that steel billets on the dispatching roller way are guided to be conveyed to different roller ways with single flow width, and the steel billets can be guided to the direction of the straight rolling roller way 5 or the direction of the hot conveying roller way 8 in the example.
The front of the straight rolling roller bed 5 is connected with a scheduling roller bed, and the rear of the straight rolling roller bed is connected with a calender 7 through a straight rolling waste removing machine 6, so that a single continuous casting billet can be conveyed to the calender 7; the straight rolling waste removing machine 6 is a traditional device which can selectively stop the casting blank conveyed on the straight rolling roller way 5 through a movable baffle plate, and then move the billet on the roller way out to the rack on the side through a transverse moving mechanism, so that the unqualified billet can be selectively moved out to the rack beside the straight rolling roller way 5 for temporary storage, and the unqualified billet is not sent to the calender 7.
The hot conveying roller way 8 is connected with the dispatching roller way 4 in front and then connected with the casting blank heating furnace 11 through the casting blank straightening machine 9 and the hot conveying waste removing machine 10, and a single continuous casting blank can be conveyed to a steel inlet of the casting blank heating furnace 11, so that the single continuous casting blank enters the casting blank heating furnace 11 to be heated.
The casting blank straightener 9 is provided with a plurality of laterally guided rotating rollers, when the bent hot casting blank passes through the casting blank straightener 9, the hot casting blank can be straightened into a relatively straight state by the rotating rollers of the casting blank straightener 9 in the pinch guiding process, and the straightness meeting the requirements is ensured to be achieved when the hot casting blank subsequently enters the casting blank heating furnace 11.
The hot conveying waste removing machine 10 is a traditional device which can selectively move the casting blank conveyed by the casting blank straightening machine 9 out of the lateral rack to be stacked through a transverse moving mechanism after being blocked by a movable baffle plate, so that unqualified blanks are selectively moved out of the hot conveying roller way 8 to the nearby rack to be temporarily stored and are not conveyed to the casting blank heating furnace 11.
The casting blank heating furnace 11 is used for horizontally moving the casting blank sent from the hot conveying roller way to the calender 7 in the furnace, heating or homogenizing the temperature of the casting blank in the furnace, and then the casting blank is discharged from the casting blank heating furnace 11 and enters the calender 7.
Example 3
A novel energy-saving device for producing long steel by calendering by utilizing smelting waste heat comprises a multi-strand continuous casting machine 1, a multi-strand roller bottom tunnel kiln 2, a roller bottom traversing machine 3, a dispatching roller way and shifting fork 4, a direct rolling roller way 5, a direct rolling waste removing machine 6, a hot conveying roller way 8, a casting blank straightening machine 9, a hot conveying waste removing machine 10, a casting blank heating furnace 11 and a calender 7. The multi-strand continuous casting machine 1 is connected with a multi-strand roller bottom tunnel kiln 2; the multi-stream roller bottom tunnel kiln 2, the roller bottom traversing machine 3, the dispatching roller way and the shifting fork 4 are connected in sequence; the dispatching roller way and the shifting fork 4 divide the roller way into two strands, one strand of which is sequentially connected with a direct rolling roller way 5, a direct rolling waste removing machine 6 and a rolling mill 7, the other strand of which is sequentially connected with a hot conveying roller way 8, a casting blank straightening machine 9, a hot conveying waste removing machine 10 and a casting blank heating furnace 11, and the casting blank heating furnace 11 is further connected with the rolling mill 7 to form a set of rolling production line.
The multi-strand roller bottom tunnel kiln 2 is arranged between a casting blank shearing machine of the multi-strand continuous casting machine 1 and the roller bottom cross sliding machine 3, and is arranged at two sections close to an outlet of the casting blank shearing machine and an inlet of the roller bottom cross sliding machine 3, and each strand of casting blank is provided with an independent set which can only accommodate the passage of 1 strand of casting blank. The four sides of the conveying roller way in the multi-flow roller-bottom tunnel kiln 2 are in a channel cover form sealed by heat-insulating materials, the channel cover is divided into an upper part and a lower part, the upper part and the lower part are combined, and the upper cover can be lifted and separated, so that the maintenance and the operation are convenient. A plurality of heaters are arranged in the multi-stream roller bottom tunnel kiln 2, and the casting blank passing through the inner part is heated by adopting resistance heat supply, so that the temperature of the casting blank is increased or is uniform. And a plurality of casting blank position detection and casting blank temperature detection devices are arranged in the multi-stream roller bottom tunnel kiln 2, so that the position and the temperature of a casting blank can be detected.
The roller bottom traversing machine 3 is provided with a plurality of groups of roller ways and movable baffles, can convey casting blanks to move to subsequent dispatching roller ways and shifting forks 4, can stop the casting blanks on the roller bottom traversing machine 3 through starting and stopping or the action of the movable baffles, collects the casting blanks through a traversing mechanism, and moves out of a production line from the side.
The dispatching roller way and the shifting fork 4 divide the roller way into two strands, the dispatching roller way is a roller way group with gradually narrowed width, and billets conveyed in the multi-flow direction can be guided to the straight rolling roller way 5 with single flow width or the hot conveying roller way 8 for conveying through the baffles on the two sides of the roller way. The shifting fork is a baffle capable of swinging around the fixed shaft, the fixed shaft is positioned at a bifurcation point of the roller way, and the shifting fork swings to different positions to form contraction channels with different directions with the fixed baffle, so that steel billets on the dispatching roller way are guided and conveyed to roller ways with different single flow widths, and the steel billets can be guided to the direction of a straight rolling roller way 5 or the direction of a hot conveying roller way 8 in the example.
The front of the straight rolling roller bed 5 is connected with a scheduling roller bed, and the rear of the straight rolling roller bed is connected with a calender 7 through a straight rolling waste removing machine 6, so that a single continuous casting billet can be conveyed to the calender 7; the straight rolling waste removing machine 6 is a traditional device which can selectively stop the casting blank conveyed on the straight rolling roller way 5 through a movable baffle plate, and then move the billet on the roller way out to the rack on the side through a transverse moving mechanism, so that the unqualified billet can be selectively moved out to the rack beside the straight rolling roller way 5 for temporary storage, and the unqualified billet is not sent to the calender 7.
The hot conveying roller way 8 is connected with the dispatching roller way 4 in front and then connected with the casting blank heating furnace 11 through the casting blank straightening machine 9 and the hot conveying waste removing machine 10, and a single continuous casting blank can be conveyed to a steel inlet of the casting blank heating furnace 11, so that the single continuous casting blank enters the casting blank heating furnace 11 to be heated.
The casting blank straightener 9 is provided with a plurality of laterally guided rotating rollers, when the bent hot casting blank passes through the casting blank straightener 9, the hot casting blank can be straightened into a relatively straight state by the rotating rollers of the casting blank straightener 9 in the pinch guiding process, and the straightness meeting the requirements is ensured to be achieved when the hot casting blank subsequently enters the casting blank heating furnace 11.
The hot conveying waste removing machine 10 is a traditional device which can selectively move the casting blank conveyed by the casting blank straightening machine 9 out of the lateral rack to be stacked through a transverse moving mechanism after being blocked by a movable baffle plate, so that unqualified blanks are selectively moved out of the hot conveying roller way 8 to the nearby rack to be temporarily stored and are not conveyed to the casting blank heating furnace 11.
The casting blank heating furnace 11 is used for horizontally moving the casting blank sent from the hot conveying roller way to the calender 7 in the furnace, heating or homogenizing the temperature of the casting blank in the furnace, and then the casting blank is discharged from the casting blank heating furnace 11 and enters the calender 7.
In addition, the calendering production line in embodiments 1 to 3 can be flexibly combined with the multi-strand casting machine 1 according to production requirements, for example, a single multi-strand casting machine 1 is connected with a single set of calendering production line, or a plurality of multi-strand casting machines 1 are connected with a single set of calendering production line, or a single multi-strand casting machine 1 is connected with a plurality of sets of calendering production lines, or a plurality of multi-strand casting machines 1 are connected with a plurality of sets of calendering production lines.
The energy-saving method for producing long steel by calendering smelting waste heat comprises the following steps:
firstly, when the steel product with lower temperature control requirement is produced by rolling, a heating furnace-free direct rolling method is adopted:
i, continuous casting online heat compensation: casting blanks cast by the multi-strand continuous casting machine 1 enter the multi-strand roller bottom tunnel kiln 2 respectively when reaching a horizontal state and being transferred forwards, a heating device in the multi-strand roller bottom tunnel kiln 2 heats the casting blanks according to the required temperature of the casting blanks, and meanwhile, the casting blanks move forwards;
II, sequencing the casting blanks: when a multi-flow casting blank passes through the multi-flow roller way tunnel kiln 2 and reaches the front of the roller bottom traversing machine 3, the traveling speed or the starting and stopping of the casting blank are controlled according to the position and the temperature of the casting blank in each multi-flow roller bottom tunnel kiln 2, the casting blanks pass through the roller bottom traversing machine 3 one by one through the adjustment of the sequence, and enter the dispatching roller way uniformly at intervals, so that 2 or more than 2 casting blanks are prevented from entering the roller bottom traversing machine 3 at the same time; the roller bottom traversing machine 3 leads the casting blank to pass through a dispatching roller way, or stops the casting blank sent by the multi-stream roller bottom tunnel kiln 2 on the roller bottom traversing machine 3 through a movable baffle or roller way rotating speed control when needed, then traverses to a storage position on the side surface, and does not directly enter the dispatching roller way;
III, casting blank direct rolling and conveying: the dispatching roller way and the shifting fork 4 guide the casting blanks sent one by one to the straight rolling roller way 5, and the straight rolling roller way 5 sends the casting blanks to the calender 7 through the straight rolling waste removing machine 6;
IV, fault treatment: when the calender 7 breaks down, the casting blank in front of the roller bottom traversing machine 3 is blocked by the lifting baffle of the roller bottom traversing machine 3, and the roller bottom traversing machine 3 collects the casting blank horizontal moving lower line, so that the running of the multi-strand continuous casting machine 1 is ensured not to be interrupted; the straight rolling waste removing machine 6 on the straight rolling roller way 5 blocks the casting blank on the straight rolling roller way 5 through a lifting baffle plate, and the straight rolling waste removing machine 6 collects the casting blank in a transverse moving and offline manner in the same manner as the roller bottom transverse moving machine 3, so that the operation of the front equipment is not interrupted.
When the steel product with higher temperature control requirement is produced by rolling, a heating furnace hot conveying method is adopted:
i, continuous casting online heat preservation: when the casting blank cast by the multi-strand continuous casting machine 1 reaches a horizontal state and is transferred forwards, the casting blank respectively enters the multi-strand roller bottom tunnel kiln 2, a heating device in the multi-strand roller bottom tunnel kiln 2 is not started, and the casting blank moves forwards;
II, sequencing the casting blanks: when a multi-stream casting blank passes through the multi-stream roller bottom tunnel kiln 2 and reaches the roller bottom traversing machine 3, the traveling speed or the starting and stopping of the casting blank are controlled according to the position and the temperature of the casting blank in each multi-stream roller bottom tunnel kiln 2, the casting blanks pass through the roller bottom traversing machine 4 one by one through the adjustment of the sequence, and enter a dispatching roller way uniformly at intervals, so that 2 or more than 2 casting blanks are prevented from entering the roller bottom traversing machine 4 at the same time; the roller bottom traversing machine 4 leads the casting blank to pass through a dispatching roller way, or stops the casting blank sent by the multi-stream roller bottom tunnel kiln 2 on the roller bottom traversing machine 4 through a movable baffle or roller way rotating speed control when needed, and then traverses to a storage position on the side surface without directly entering the dispatching roller way;
III, casting blank thermal state conveying: the dispatching roller way and the shifting fork 4 guide the casting blanks sent one by one to the hot conveying roller way 8, and the hot conveying roller way 8 conveys the casting blanks to the casting blank heating furnace 11 through the casting blank straightener 9 and the hot conveying waste remover 10; before the casting blank enters a casting blank heating furnace 11, the bent casting blank is straightened by a casting blank straightener 9, and the requirement of the heating furnace for feeding the blank is ensured;
IV, casting blank heating: after a single casting blank in a high-temperature state is led in by the casting blank heating furnace 11, the casting blank is enabled to reach the temperature and uniformity when the high temperature control requirement is met through transverse movement and heating, and then enters the calender 7;
v, fault treatment: when the calender 7 breaks down, the casting blank in front of the roller bottom traversing machine 4 is blocked by the lifting baffle of the roller bottom traversing machine 4, and the roller bottom traversing machine 4 collects the casting blank horizontal moving lower line, so that the running of the multi-strand continuous casting machine 1 is not interrupted; after the casting blank on the hot conveying roller way 8 is blocked by the hot conveying waste removing machine 10 on the hot conveying roller way 8 through the lifting baffle plate, the casting blank is transversely moved and is collected in a lower line by the hot conveying waste removing machine 10 in the same way as the roller bottom transverse moving machine 4, so that the operation of the front equipment is not interrupted;
thirdly, when the continuous rolling production is required, a method of hot feeding of a heating furnace and direct rolling without the heating furnace is adopted:
when the continuous casting is normally produced: when the multi-strand continuous casting machine 1 normally casts and sends out a casting blank, the heating device in the multi-strand roller bottom tunnel kiln 2 is not started, and the casting blank sequentially passes through the multi-strand roller bottom tunnel kiln 2, the roller bottom cross sliding machine 3, the dispatching roller way and the shifting fork 4, the hot conveying roller way 8, the casting blank straightener 9, the hot conveying waste remover 10 and the casting blank heating furnace 11 and enters the calender 7 for calendering production; at the moment, a certain number of casting blanks are always stored in the casting blank heating furnace 11 and are kept in a heated state;
when the continuous casting stops producing for a short time: when the multi-strand continuous casting machine 1 stops casting for a short time due to replacement of spare parts, failure, production rhythm adjustment and the like, and no casting blank is sent out, equipment in front of the casting blank heating furnace 11 does not operate any more, the casting blank heating furnace 11 keeps operating, a casting blank stored in the casting blank heating furnace is provided, and the casting blank enters the calender 7 to keep the calendering production uninterrupted until the casting blank stored in the casting blank heating furnace 11 is completely used up;
when the continuous casting is initially recovered to produce: when the multi-strand continuous casting machine 1 recovers to send out casting blanks after replacing spare parts, processing faults or adjusting production rhythm, a heating device in the multi-strand bottom tunnel kiln 2 is started, most of the casting blanks sent out by the about 3-8-flow multi-strand continuous casting machine 1 sequentially pass through the multi-strand bottom tunnel kiln 2, a roll bottom cross sliding machine 3, a dispatching roller way and a shifting fork 4, a straight rolling roller way 5 and a straight rolling waste removing machine 6, and then enter a calender 7 for calendering production; the rest of the casting blanks sent out by the multi-strand continuous casting machine 1 sequentially pass through a multi-strand roller bottom tunnel kiln 2, a roller bottom traversing machine 3, a dispatching roller way and a shifting fork 4, a hot conveying roller way 8, a casting blank straightening machine 9 and a hot conveying waste removing machine 10 to enter a casting blank heating furnace 11 until the casting blank heating furnace 11 is filled with the casting blanks again;
IV, when the continuous casting is normally produced: after the casting blank heating furnace 11 is filled with the casting blank again, and the multi-strand continuous casting machine 1 is used for normally casting and sending out the casting blank, the heating device in the multi-strand roller bottom tunnel kiln 2 is not started, and the casting blank is recovered to sequentially pass through the multi-strand roller bottom tunnel kiln 2, the roller bottom traversing machine 3, the dispatching roller way and the shifting fork 4, the hot conveying roller way 8, the casting blank straightening machine 9, the hot conveying waste removing machine 10 and the casting blank heating furnace 11 and then enters the rolling mill 7 for rolling production.
After a casting blank is sent into a rolling workshop in the traditional technology, because the temperature of the steel blank is lower and the temperature difference between the head and the tail is larger, the rolling production requirement cannot be met, and the heating time is generally more than 1 hour through heat supplement of a heating furnace. Compared with the prior art, the utility model discloses an utilize the utility model discloses a technique can save the energy that the concurrent heating need consume about 300 and give first place to 600 GJ/ton steel, has correspondingly reduced the pollution that the fuel brought.
The present invention has been described in terms of the above embodiments, it should be understood that the above embodiments are not limited in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation modes fall within the protection scope of the present invention.
Claims (8)
1. An energy-saving device for producing long steel by calendering smelting waste heat is characterized by comprising a multi-strand continuous casting machine (1), a multi-strand roller bottom tunnel kiln (2), a roller bottom traversing machine (3), a dispatching roller way, a shifting fork (4), a direct rolling roller way (5), a direct rolling waste removing machine (6), a hot conveying roller way (8), a casting blank straightening machine (9), a hot conveying waste removing machine (10), a casting blank heating furnace (11) and a calender (7);
the multi-stream roller bottom tunnel kiln (2), the roller bottom traversing machine (3), the dispatching roller way and the shifting fork (4) are sequentially connected, the dispatching roller way and the shifting fork (4) divide the roller way into two strands, one strand is sequentially connected with the direct rolling roller way (5), the direct rolling waste remover (6) and the calender (7), the other strand is sequentially connected with the hot conveying roller way (8), the casting blank straightener (9), the hot conveying waste remover (10) and the casting blank heating furnace (11), and the casting blank heating furnace (11) is connected with the calender (7) to form a set of calendering production line; the multi-strand continuous casting machine (1) is connected with a multi-strand roller bottom tunnel kiln (2);
the multi-strand roller bottom tunnel kiln (2) is arranged between the multi-strand continuous casting machine (1) and the roller bottom cross sliding machine (3), each strand of casting blank is provided with an independent set, and only 1 strand of casting blank can pass through; a conveying roller way is arranged in the multi-flow roller-bottom tunnel kiln (2), and a channel cover made of a heat-insulating material is arranged outside the multi-flow roller-bottom tunnel kiln;
the roller bottom cross sliding machine (3) is a plurality of groups of roller ways and is provided with a movable baffle;
the dispatching roller way is a roller way group which is divided into two parts and gradually narrowed in width, and baffles are arranged on two sides of the roller way; the shifting fork swings between the two roller ways;
the multi-strand continuous casting machine (1), the multi-strand roller bottom tunnel kiln (2), the roller bottom transverse moving machine (3), the dispatching roller way and the shifting fork (4), the direct rolling roller way (5), the direct rolling waste removing machine (6), the hot conveying roller way (8), the casting blank straightening machine (9), the hot conveying waste removing machine (10) and the calender (7) are all designed in a longitudinal flow mode; the casting blank heating furnace (11) is designed to be transverse flow.
2. The energy-saving device for producing long steel by calendering with smelting residual heat according to claim 1, characterized in that the multithread roller bottom tunnel kiln (2) is arranged in the whole range from the multithread continuous casting machine (1) to the roller bottom cross sliding machine (3) or in one or more sections thereof; the channel cover is formed by combining a lower cover and an upper cover or only has the lower cover.
3. The energy-saving device for producing long steel by utilizing the rolling of the smelting waste heat according to claim 1, wherein the multi-stream roller bottom tunnel kiln (2) is provided with a plurality of heaters inside the channel cover.
4. The energy-saving device for producing the long steel by utilizing the smelting waste heat and the rolling as claimed in claim 3, wherein the heater adopts one of combustion heat supply, electromagnetic induction heat supply and resistance heat supply.
5. The energy-saving device for producing long steel by utilizing the smelting waste heat for calendering according to the claim 1, characterized in that a plurality of casting blank position detection and casting blank temperature detection devices are arranged in the multi-stream roller bottom tunnel kiln (2).
6. The energy-saving device for producing long steel by utilizing the smelting waste heat for calendering as claimed in claim 1, wherein the shifting fork swings with a branching point of the roller ways as a fixed shaft or moves in parallel between two roller ways.
7. The energy-saving device for producing the long steel by utilizing the smelting waste heat for calendering according to the claim 1 is characterized in that the straight rolling roller way (5) and the hot conveying roller way (8) are provided with heat-insulating covers or wind shields.
8. The energy-saving device for producing long steel by calendering with smelting residual heat according to claim 1, wherein a single multi-strand casting machine (1) is connected to a single set of calendering line, or a plurality of multi-strand casting machines (1) are connected to a single set of calendering line, or a single multi-strand casting machine (1) is connected to a plurality of sets of calendering lines, or a plurality of multi-strand casting machines (1) are connected to a plurality of sets of calendering lines.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020053069.1U CN211990254U (en) | 2020-01-10 | 2020-01-10 | Energy-saving device for producing long steel by calendering smelting waste heat |
| PCT/CN2020/140168 WO2021139555A1 (en) | 2020-01-10 | 2020-12-28 | Energy-saving device and method for producing elongated steel by calendaring using smelting waste heat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020053069.1U CN211990254U (en) | 2020-01-10 | 2020-01-10 | Energy-saving device for producing long steel by calendering smelting waste heat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112328A (en) * | 2020-01-10 | 2020-05-08 | 南京净环热冶金工程有限公司 | Energy-saving device and method for producing long steel by calendering smelting waste heat |
| WO2021139555A1 (en) * | 2020-01-10 | 2021-07-15 | 南京净环热冶金工程有限公司 | Energy-saving device and method for producing elongated steel by calendaring using smelting waste heat |
-
2020
- 2020-01-10 CN CN202020053069.1U patent/CN211990254U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112328A (en) * | 2020-01-10 | 2020-05-08 | 南京净环热冶金工程有限公司 | Energy-saving device and method for producing long steel by calendering smelting waste heat |
| WO2021139555A1 (en) * | 2020-01-10 | 2021-07-15 | 南京净环热冶金工程有限公司 | Energy-saving device and method for producing elongated steel by calendaring using smelting waste heat |
| CN111112328B (en) * | 2020-01-10 | 2024-10-01 | 南京净环热冶金工程有限公司 | Energy-saving device and method for producing long steel by utilizing smelting waste heat calendaring |
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