CN204338571U - For the production of the continuous casting-Direct Rolling device of Bar Wire Product and section bar - Google Patents

Abstract

The utility model relates to a kind of continuous casting-Direct Rolling device for the production of Bar Wire Product and section bar, comprises conticaster, strand cutter sweep and cuts rear roller-way, fast insulating roller way and steel rolling production-line; Conticaster is that 1 machine 1 flows or multimachine multiple-strand caster; The roller-way width of quick insulating roller way is decreased to the single strand of accommodation gradually towards the direction of steel rolling production-line to be passed through from conticaster, and this roller-way is provided with multiple hot metal detector, pyrometer and attemperator; Also comprise a steel billet coil inserting apparatus, steel billet coil inserting apparatus is selectable be arranged at quick insulating roller way before or before steel rolling production-line.The utility model also provides a kind of continuous casting-Direct Rolling method for the production of Bar Wire Product and section bar.The utility model, by cancelling traditional heating stove, makes full use of the metallurgical heat energy of continuous casting billet, greatly can reduce the energy consumption in Bar Wire Product, section bar production and discharge; Simplification of flowsheet, reduces the equipment investment of furnace area, reduces costs; Reduce the oxidization burning loss of steel billet, improve lumber recovery.

Description

Continuous casting-direct rolling plant for the production of rod, wire and profiles

technical field

The utility model relates to the technical field of continuous casting and rolling of bars, wires and profiles, in particular to a continuous casting-direct rolling device for producing bars, wires and profiles.

Background technique

At present, there are generally two production processes for rods, wires and profiles, one is continuous casting → billet off-line cooling → cold billet feeding → heating furnace heating → rolling, and the other is continuous casting → hot delivery and hot charging → heating Furnace heating → rolling. Due to the long cooling time and low temperature after the continuous casting slab is cut, these two production processes cannot meet the rolling temperature requirements of the rolling mill. The continuous casting slab must be reheated by a heating furnace before rolling. There are four main problems in heating with a heating furnace: first, the energy consumption is huge, and the fuel consumption of the heating furnace can account for 60%-70% of the energy consumption of the steel rolling process; First, the heating furnace produces a large amount of smoke and exhaust gas emissions. Fourth, the investment in heating furnace equipment, operators, and plant land is relatively large.

In order to solve the above problems, many experts and scholars have studied various methods. Chinese Patent 1 "Continuous Casting and Rolling Method for Producing Profile Rods and Wires Using Waste Heat of Molten Steel" (publication number: CN102310078A) proposes a continuous casting and rolling method for profile bars and wires. When the output of the production line is too low, there are too many rolling mills and too much investment when using multi-stream production. Chinese Patent 2 "A Production Equipment for Continuous Casting and Rolling of Long Profiles" (Publication No.: CN101693254A) and Chinese Patent 3 "Continuous Casting and Rolling Device for Producing Long Profiles" (Publication No.: CN202667242U) use induction heating devices and rolls respectively The bottom heating furnace heats the continuous casting slab. Although the traditional heating furnace is cancelled, there are problems of high equipment investment, production still consumes a lot of electric energy or fuel, and oxidation burns a lot. Chinese patent 4 "A device for producing steel bars by directly rolling billets at low temperature without heating" (publication number: CN203648986U) Although the heating furnace is canceled, the device adopts multiple rows of continuous casting slabs in parallel, and then divides the steel by a horizontal allocation device The method of feeding the last single strand into the hot-feeding roller table will cause the continuous casting billet to enter the hot-feeding roller table for a long time and the temperature drop will be too large, and the cooling of the continuous casting billet will also be increased due to the need to move the steel horizontally. It can be seen that there is no essential difference between this device and the currently commonly used hot-feeding and hot-charging technology. The temperature drop of the continuous casting slab is too large to meet the rolling requirements of the rolling mill, so it is not feasible.

Therefore, it is necessary to design a continuous casting-direct rolling device for producing rods, wires and profiles to overcome the above problems.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a continuous casting-direct rolling device for producing rods, wires and profiles, which can solve the problems of high energy consumption and high emissions in the production of bars, wires and profiles, and has It is beneficial to reduce production cost and energy saving and emission reduction.

The utility model is achieved in that:

The utility model provides a continuous casting-direct rolling device for producing rods, wires and profiles, which includes a continuous casting machine, a billet cutting device, a roller table after cutting, a fast heat preservation roller table and a steel rolling production line closely connected in sequence; The continuous casting machine is a continuous casting machine with one machine and one stream or multiple machines and multiple streams, which adopts a stepped billet discharge method; the width of the roller table of the rapid heat preservation roller table is gradually reduced from the continuous casting machine to the direction of the steel rolling production line. Accommodating a single billet to pass through, the roller table is equipped with multiple hot metal detectors, pyrometers and heat preservation devices; the continuous casting-direct rolling device for producing rods, wires and profiles also includes a billet off-line device, The billet off-line device can be optionally arranged in front of the rapid heat preservation roller table or in front of the steel rolling production line.

Further, the slab cutting device adopts a flame cutting device or a hydraulic shear cutting device.

Further, the cut roller table is driven by a frequency conversion motor, and a heat preservation device is installed on it.

Further, the rapid thermal insulation roller table is driven by a frequency conversion motor, and it is provided with slopes and curves, wherein the slope angle is not greater than 15°, and the curve angle is between 90° and 180°.

Further, the billet off-line device adopts electric drive or hydraulic drive.

Further, the number of steel billets stored in the billet off-line device is not less than 20.

Further, the slab cutting device and the cutting roller table have a sizing range of 4-12m.

Further, the casting speed of the continuous casting machine is 1.5-10.0m/min

The utility model has the following beneficial effects:

The utility model provides a continuous casting-direct rolling device for producing rods, wires and profiles, cancels the traditional heating furnace, makes full use of the metallurgical heat energy of the continuous casting slab, and can greatly reduce the energy consumption in the production of rods, wires and profiles and emissions; simplify the process flow, reduce equipment, refractory materials, personnel, and plant investment in the heating furnace area; reduce oxidation and burning loss of steel billets, and increase the yield of finished products.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is a schematic layout diagram of a multi-machine multi-strand continuous casting machine corresponding to a steel rolling production line provided by the embodiment of the present invention, and a billet off-line device arranged in front of the steel rolling production line;

Fig. 2 is a schematic plan layout diagram of a multi-machine multi-stream continuous casting machine corresponding to a steel rolling production line provided by the embodiment of the present invention, and a billet off-line device arranged in front of the rapid heat preservation roller table;

Fig. 3 is a schematic layout diagram of the multi-machine multi-strand continuous casting machine corresponding to two steel rolling production lines provided by the embodiment of the present invention, and the billet off-line device is arranged in front of the steel rolling production line;

Fig. 4 is a schematic diagram of the plane layout of the multi-machine multi-stream continuous casting machine corresponding to two steel rolling production lines provided by the embodiment of the present invention, and the billet off-line device is arranged in front of the rapid heat preservation roller table;

Fig. 5 is a schematic diagram of the continuous casting slab climbing on the rapid heat preservation roller table provided by the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1 to 5, the embodiment of the utility model provides a continuous casting-direct rolling device for producing rods, wires and profiles, including a continuous casting machine 1 closely connected in sequence, a billet cutting device and a roller table after cutting 2. Rapid thermal insulation roller table 3 and steel rolling production line 5.

The continuous casting machine 1 is a one-machine-one-strand continuous casting machine 1 or a multi-machine multi-strand continuous casting machine 1, which adopts a stepped billet discharge method, and each stream is independently controlled. The slab cutting device adopts a flame cutting device or a hydraulic shearing and cutting device, and each strand of slab is cut independently, and the post-cutting roller table is driven by a frequency conversion motor, and a heat preservation device is installed on it.

The fast thermal insulation roller table 3 is driven by a frequency conversion motor, and the front section is a long roller. The length of the roll body can cover multi-stream continuous casting slabs according to the output of the steel rolling production line 5. The roller table width of the rapid thermal insulation roller table 3 is from the continuous casting machine 1 In the direction of the steel rolling production line 5, it gradually decreases to accommodate a single slab to pass through, and the roller table is controlled in groups. There are multiple hot metal detectors and pyrometers on the roller table to track and monitor the temperature of the continuous casting slab. The whole line is equipped with thermal insulation devices; the rapid thermal insulation roller table 3 can realize the turning and climbing of the continuous casting slab according to the layout requirements. Between °, that is, when turning and climbing, 90°≤curve angle≤180°, and climbing angle≤15°; the surface speed of the 3 rollers of the fast heat preservation roller table is 0.5-5.0m/s.

The continuous casting-direct rolling device for producing rods, wires and profiles also includes a billet off-line device 4, and the billet off-line device 4 can be optionally arranged in front of the rapid heat preservation roller table 3 or in the steel rolling Before the production line 5, the billet off-line device 4 is driven electrically or hydraulically to remove unqualified billets or to cool excess billets off-line, and the number of stored billets in the billet off-line device 4 is not less than 20.

The steel rolling production line 5 is a conventional bar and wire rod, profile rolling mill and its auxiliary equipment, capable of low-temperature rolling. According to the output of the continuous casting machine 1, one or more steel rolling production lines 5 can be set to match it.

The utility model also provides a continuous casting-direct rolling method for producing rods, wires and profiles, comprising the following steps:

Step 1: At the beginning of pouring, the continuous casting machine 1 forms a ladder-shaped billet discharge method by successively extracting dummy rods or adjusting the casting speed, with a certain distance between each flow of continuous casting billets.

Step 2: When the continuous casting slab reaches the fixed-length cutting position, the slab cutting device and the post-cutting roller table 2 cut the continuous casting slab successively. After that, the billet is quickly ejected and enters the rapid heat preservation roller table 3.

Step 3: While the billet is conveyed at high speed by the fast heat preservation roller table 3 with heat preservation device, the position is also adjusted, turning and climbing as required, and the billet is tracked by multiple hot metal detectors and pyrometers and temperature monitoring.

Step 4: When the casting slab reaches the entrance of the steel rolling production line 5, it will directly enter the rolling mill at the rear end after deceleration for rolling. When the rolling starts, the surface temperature of the casting slab is not less than 850°C. The slab with a minimum surface temperature of 850°C is rolled.

Step 5: When the steel rolling production line 5 changes rolls and grooves, accidents occur, production is stopped for maintenance, or when the hourly output of continuous casting is greater than the hourly output of rolling steel, the excess billets are cooled off through the billet off-line device 4 .

Wherein, the billet off-line device 4 can be optionally arranged in front of the rapid heat preservation roller table 3 or in front of the steel rolling production line 5 . The cooling time of the continuous casting slab from cutting to rolling is less than 5 minutes. The range of the slab cutting device and the roller table 2 after cutting is 4-12m, adopting the method of cutting each strand of slab successively, and single rapid slab discharge, the interval time before and after the cutting of two strands of slab and the rolling steel The rolling cycle is equal, and the surface speed of the roller table after cutting is 0.025-3.0m/s. The billet casting speed of the continuous casting machine 1 is 1.5-10.0m/min, and the cross-sectional size of the billet is 100mm×100mm-500mm×500mm.

The continuous casting-direct rolling device for producing rods, wires and profiles cancels the traditional heating furnace and makes full use of the metallurgical heat energy of the continuous casting billet, which can greatly reduce the energy consumption and emissions in the production of rods, wires and profiles; simplify the process Process, reduce investment in equipment, refractory materials, personnel, and plant buildings in the heating furnace area; reduce oxidation and burning loss of steel billets, and increase the yield of finished products. In the continuous casting-direct rolling method for producing rods, wires and profiles, the continuous casting slabs are sequentially cut, and the single billets are quickly released in a stepped way, and are conveyed at a high speed by a fast heat preservation roller table 3 with a heat preservation device. To the entrance of the rolling mill, it avoids the waiting time caused by the continuous casting slabs due to lateral movement and steel separation. The cooling time of each continuous casting slab is short and the same, which meets the requirements of the starting rolling temperature and ensures the quality stability of the same batch of products . In addition, the rapid heat preservation roller table 3 has simple equipment and is easy to implement.

The utility model has the following several specific embodiments:

Embodiment 1: As shown in Figure 1, the utility model provides a continuous casting-direct rolling device for producing rods, wires and profiles, including a continuous casting machine 1, a billet cutting device and a roller table 2 after cutting, Rapid thermal insulation roller table 3, billet off-line device 4 and steel rolling production line 5, the continuous casting machine 1 is a 5-machine 5-strand continuous casting machine, each stream is independently controlled, the casting speed is 1.5-3.5m/min, and the continuous casting billet The section size is 150mm×150mm; the slab cutting device and the roller table 2 after cutting adopt flame cutting device or hydraulic shearing device, the length is 12m, the roller table after cutting is driven by frequency conversion motor, and the surface speed of the roller is 0.025-2m/s , equipped with a heat preservation device; the fast heat preservation roller table 3 is a climbing roller table, driven by a frequency conversion motor, the surface speed of the roller is 0.5-3.5m/s, and the front section of the roller table is a long roller, which can meet the passing of 5 strands of continuous casting slabs After that, the width of the roller table is gradually reduced to only allow a single steel billet to pass through, and the roller table is controlled in groups. There are a number of hot metal detectors and pyrometers to track and monitor the temperature of the steel billet. The whole line is equipped with heat preservation devices; the billet off-line device 4 The horizontal section arranged at the end of the fast heat preservation roller table 3 is located in front of the steel rolling production line 5, and is driven by electric or hydraulic pressure, and the number of stored billets is not less than 20; Low temperature rolling capacity. Its production process is as follows: 5 machines and 5 strands of continuous casting machine 1, at the beginning of casting, successively extract the dummy bars or adjust the casting speed to form a stepped billet discharge method. The distance between each stream of continuous casting billets is 2.4m. When the slab reaches the cut-to-length position, the slab cutting device and the post-cutting roller table 2 will cut the continuous casting slab successively. After cutting a single slab, the slab will be released quickly, and the position will be completed while the fast heat preservation roller table 3 is conveying at high speed. Adjust and climb the slope to reach the entrance 5 of the steel rolling production line, and directly enter the rolling mill for rolling after deceleration; the casting billet is transported and cooled for less than 3 minutes from cutting to rolling, and the surface temperature of the billet is not less than 850°C when rolling is started; when the rolling line is changed When the rollers change slots, accidents occur, production is stopped for maintenance, or when the hourly output of continuous casting is greater than the hourly output of steel rolling, the excess steel billets are cooled by the billet off-line device 4 single off-line.

Embodiment 2: As shown in Fig. 2, the utility model provides a kind of continuous casting-direct rolling device for producing bar and wire rod and profile, comprising continuous casting machine 1, billet cutting device and roller table 2 after cutting, Rapid thermal insulation roller table 3, billet off-line device 4 and steel rolling production line 5. The difference from Example 1 is that the billet off-line device 4 is set at the slab cutting device and the cut roller table 2, before the fast heat preservation roller table 3, when the rolling line changes rolls and slots, accidents occur, and production is stopped for maintenance, Or when the hourly output of continuous casting is greater than the hourly output of steel rolling, the redundant billets are cooled off in rows through the billet off-line device 4 .

Embodiment 3: As shown in Figure 3, the utility model provides a continuous casting-direct rolling device for producing rods, wires and profiles, including a continuous casting machine 1, a billet cutting device and a roller table 2 after cutting, Rapid thermal insulation roller table 3, billet off-line device 4 and steel rolling production line 5. The difference from Example 1 is that the device uses a multi-machine multi-stream continuous casting machine 1 corresponding to two steel rolling production lines 5 to match the output balance between continuous casting and steel rolling. The two steel rolling production lines can be used to produce rods and wires of the same product , profile production line, or bar, wire, and profile production line for the production of different products. The continuous casting machine adopts a ladder-shaped billet discharge method. After the billets are cut successively, according to the output matching situation, a single strand quickly enters the fast heat preservation roller table 3 of the corresponding steel rolling production line 5, and then enters the rolling mill for direct rolling.

Embodiment 4: As shown in Figure 4, the utility model provides a continuous casting-direct rolling device for producing rods, wires and profiles, including a continuous casting machine 1, a billet cutting device and a roller table 2 after cutting, Rapid thermal insulation roller table 3, billet off-line device 4 and steel rolling production line 5. The difference from Example 3 is that the billet off-line device 4 is set at the slab cutting device and the post-cut roller table 2, and is located before the fast heat preservation roller table 3. Or when the hourly output of continuous casting is greater than the hourly output of steel rolling, the redundant billets are cooled off in rows through the billet off-line device 4 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (8)

1. A continuous casting-direct rolling device for producing rods and wire rods and profiles, characterized in that it comprises successively closely connected continuous casting machines, slab cutting devices and roller tables after cutting, rapid thermal insulation roller tables and rolling production lines ; The continuous casting machine is a one-machine one-stream or multi-machine multi-stream continuous casting machine, which adopts a stepped billet discharge method; The roller table width of the rapid thermal insulation roller table is gradually reduced from the direction of the continuous casting machine toward the steel rolling production line to accommodate a single slab to pass through, and the roller table is provided with multiple hot metal detectors, pyrometers and heat preservation devices; The continuous casting-direct rolling device for producing rods, wires and profiles also includes a billet off-line device, and the billet off-line device can be optionally arranged in front of the rapid heat preservation roller table or in front of the steel rolling line. 2. The continuous casting-direct rolling device for producing rods, wires and profiles according to claim 1, characterized in that: the slab cutting device is a flame cutting device or a hydraulic shear cutting device. 3. The continuous casting-direct rolling device for producing rods, wires and profiles as claimed in claim 1 or 2, characterized in that: the roller table after cutting is driven by a frequency conversion motor, and a heat preservation device is arranged on it. 4. The continuous casting-direct rolling device for producing rods, wires and profiles as claimed in claim 1, characterized in that: the rapid thermal insulation roller table is driven by a frequency conversion motor, and it is provided with a slope and a bend, wherein the slope The angle is not greater than 15°, and the corner angle is between 90° and 180°. 5. The continuous casting-direct rolling device for producing rods, wires and profiles according to claim 1, characterized in that: the billet off-line device is driven by electric drive or hydraulic drive. 6. The continuous casting-direct rolling device for producing rods, wires and profiles according to claim 1 or 5, characterized in that: the number of stored billets in the billet off-line device is not less than 20. 7. The continuous casting-direct rolling device for producing rods, wires and profiles according to claim 1, characterized in that: the slab cutting device and the cutting roller table have a sizing range of 4-12m. 8. The continuous casting-direct rolling device for producing rods, wires and profiles according to claim 1, characterized in that: the casting speed of the continuous casting machine is 1.5-10.0 m/min.