Automatic batching system for submerged arc furnace by weight reduction method

Abstract

The utility model discloses a submerged arc furnace weight reduction method automatic batching system which comprises a PLC terminal, a mineral material bin and a batching conveying belt, a weighing bin is installed at the bottom of the mineral material bin, a transfer conveying belt, a batching bin and a batching conveying belt are sequentially arranged at the bottom of the weighing bin, and the weighing bin, the transfer conveying belt and the batching bin are all provided with weighing sensors. A weighing platform used for weighing the weight of the remaining materials is further arranged at the bottom of the transfer conveying belt, the bottom of the weighing bin is in a hopper shape, and a material control mechanism is installed at the bottom of the weighing bin. According to the automatic batching system for the submerged arc furnace by the weight reduction method, a numerical value obtained by subtracting the blanking weight of the batching bin in the charging time period from the total amount of the mineral aggregate in the batching bin after the mineral aggregate charging is completed is the weight of the residual mineral aggregate in the batching bin, the actual numerical value after the charging is compared with the calculated numerical value, and the weight ratio is checked and corrected; not only can online feeding be realized, but also the batching accuracy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic batching of submerged arc furnaces by weight loss method. Background Art

[0002] The gravimetric method of electric arc furnace is a commonly used metallurgical process, and one of its key operations is automatic batching. The research and design of the automatic batching system for the gravimetric method of electric arc furnace is of great significance for improving production efficiency, reducing production costs and improving product quality. The basic concept of the automatic batching system for the gravimetric method of electric arc furnace is that the automatic batching system is a typical control system, and its main function is to collect the quantity of various raw materials according to the set batching ratio and adjust them in time, so as to ensure the accuracy, reliability and stability of the automatic batching. The automatic batching system for the gravimetric method of electric arc furnace is an automated management of raw material transportation, supply, weighing and control in the electric arc furnace.

[0003] There are usually two ways to add materials. One is to notify the batching to start adding materials. This method will stop the batching and requires sufficient materials to be added before the batching work. The second is to add materials at the same time. Since batching and adding materials are carried out at the same time, the batching values ​​during the adding time period need to be calculated, which will result in errors. For this reason, after research, the online feeding system of the ore-fired furnace weight loss method is optimized and improved to further improve its accuracy and reduce errors. Utility Model Content

[0004] The utility model aims to provide an automatic batching system for a submerged arc furnace using a weight loss method to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The automatic batching system of the ore arc furnace by weight loss method comprises a PLC terminal, an ore bin and a batching conveyor belt. A weighing bin is installed at the bottom of the ore bin. A transfer conveyor belt, a batching bin and a batching conveyor belt are arranged at the bottom of the weighing bin in sequence. The weighing bin, the transfer conveyor belt and the batching bin are all provided with weighing sensors. A weighing platform for weighing the weight of residual materials is also arranged at the bottom of the transfer conveyor belt.

[0007] As a further solution of the utility model: the bottom of the weighing bin is bucket-shaped and is equipped with a material control mechanism:

[0008] The material control mechanism includes a gate, a rotating shaft, a gate seat, an electric push rod and a bin seat. The gate is rotatably installed at the discharge end of the weighing bin through the rotating shaft. The gate is installed with the gate seat, and the weighing bin is installed with the bin seat. A rotatable electric push rod is installed between the gate seat and the bin seat. The electric push rod contracts to pull the gate to open and close to control the flow.

[0009] As a further solution of the utility model: the transfer conveyor belt can be rotated forward and reversely, and a feed discharge pipe and a feeding bin are provided on the other side of the transfer conveyor belt. The material on this side of the transfer conveyor belt enters the feeding bin through the feed discharge pipe, and the feeding bin is provided with a feed discharger for precise feeding.

[0010] As a further solution of the utility model: the transfer conveyor belt rotates counterclockwise to fill the material into the batching bin, and the transfer conveyor belt rotates clockwise to fill the material into the replenishing bin through the discharge pipe.

[0011] As a further solution of the utility model: the transmission direction of the batching conveyor belt is to first receive the material from the batching bin and then receive the material from the replenishing bin. A front weighing sensor and an error weighing sensor are arranged at the bottom of the batching conveyor belt.

[0012] As a further solution of the utility model: a vibrating feeder is provided at the feed discharge end of the batching bin.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The automatic batching system of the submerged arc furnace using the weight loss method calculates the difference between the weighings before and after. The value obtained by subtracting the weight of the materials discharged from the batching bin during the feeding period from the total amount of the materials in the batching bin after the materials are added is the weight of the remaining materials in the batching bin. After the materials are added, the actual value is compared with the calculated value to check and correct the weight ratio, which can not only realize online feeding, but also improve the accuracy of batching.

[0015] 2. The automatic batching system of the ore-fired furnace by weight loss method can achieve the purpose of rapid material feeding, shorten the feeding time, and reduce the calculation error and actual error through the improvement of the material control mechanism.

[0016] 3. The automatic batching system of the ore-fired furnace by weight loss method sends the excess material into the feeding bin through the transfer conveyor belt. The feeding bin is replenished by the error between the error weighing sensor and the standard ratio weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a block diagram of an automatic batching system for a submerged arc furnace by weight loss method;

[0018] Figure 2 It is a structural schematic diagram of an automatic batching system for a submerged arc furnace using a weight loss method;

[0019] Figure 3 It is a schematic diagram of the structural connection between a weighing bin and a material control mechanism in an automatic batching system using a weight loss method for an electric arc furnace;

[0020] Figure 4 It is a structural schematic diagram of a material control mechanism in an automatic batching system of a submerged arc furnace using a weight loss method;

[0021] Figure 5 It is a structural front view of a material control mechanism in an automatic batching system of a submerged arc furnace using a weight loss method;

[0022] Figure 6 It is a feeding block diagram of a feeding bin of an automatic batching system of a submerged arc furnace using a weight loss method;

[0023] Figure 7 This is a schematic diagram of the structure of the feeding bin in an automatic batching system using the weight loss method for an electric arc furnace.

[0024] In the figure: 1. Ore bin; 2. Weighing bin; 3. Material control mechanism; 301. Gate; 302. Rotating shaft; 303. Gate seat; 304. Electric push rod; 305. Bin seat; 4. Transfer conveyor belt; 5. Weighing platform; 6. Batching bin; 7. Vibrating feeder; 8. Batching conveyor belt; 9. Feeding pipe; 10. Feeding bin; 11. Front weighing sensor; 12. Error weighing sensor. DETAILED DESCRIPTION

[0025] See also Figures 1 to 7 In the embodiment of the utility model, the automatic batching system of the ore furnace weight loss method includes a PLC terminal, an ore bin 1 and a batching conveyor belt 8. A weighing bin 2 is installed at the bottom of the ore bin 1. A transfer conveyor belt 4, a batching bin 6 and a batching conveyor belt 8 are arranged in sequence at the bottom of the weighing bin 2. The weighing bin 2, the transfer conveyor belt 4 and the batching bin 6 are all provided with weighing sensors. A weighing platform 5 for weighing the weight of the remaining material is also arranged at the bottom of the transfer conveyor belt 4. The PLC terminal is a prior art. The PLC control can control various equipment and processes in the mineral field, including mining, mineral processing, transportation, etc. The data transmitted by the weighing sensor is transmitted to the PLC control through an electrical signal. The PLC controls the unloading. The ore enters the weighing bin 2 from the ore bin 1. The weighing bin 2 is weighed to obtain the total weight. The weighing bin 2 starts to unload. The weight of the weighing bin 2 becomes a small value, which is the weight of the added material this time. 4 is transported to the batching bin 6 for feeding. The batching bin 6 is simultaneously unloading and feeding. At this time, the weight difference before and after the weighing bin 2 is the feeding amount of the batching bin 6. The weight of the batching bin 6 before feeding plus the weight of the mineral material missing from the weighing bin 2 is the total amount of mineral material in the batching bin 6 after the mineral material feeding is completed. The front weighing sensor 11 and the error weighing sensor 12 record the unloading weight of the batching bin 6 during the feeding time period. The weight is the weight measured by the error weighing sensor 12 minus the total amount measured by the front weighing sensor 11. The total amount of mineral material in the batching bin 6 after the mineral material feeding is completed minus the unloading weight of the batching bin 6 during the feeding time period is the value obtained by subtracting the unloading weight of the batching bin 6 during the feeding time period as the remaining mineral material weight in the batching bin 6. Through this structure and calculation method, the online addition of minerals can be realized, the feeding process can be completed during the batching process, and the error is small and the measurement is accurate. The actual measured value and the calculated value are within the error error difference range.

[0026] In a preferred embodiment, the bottom of the weighing bin 2 is bucket-shaped and is equipped with a material control mechanism 3:

[0027] The material control mechanism 3 includes a gate 301, a rotating shaft 302, a gate seat 303, an electric push rod 304 and a bin seat 305. The gate 301 is rotatably installed at the discharge end of the weighing bin 2 through the rotating shaft 302. The gate 301 is installed with the gate seat 303, and the weighing bin 2 is installed with the bin seat 305. A rotatable electric push rod 304 is installed between the gate seat 303 and the bin seat 305. The electric push rod 304 contracts and pulls the gate 301 to open and close to control the flow. According to actual applications, the longer the time for the weighing bin 2 to add materials to the batching bin 6 is, the greater the calculated error and the actual error will be, and vice versa. The shorter the feeding time, the smaller the calculated error and the actual error. Therefore, by improving the feeding of the weighing bin 2 to a variable feeding type, the feeding port is enlarged when fully opened. Before the total feeding value is 100kg, the gate 301 is in a fully open state, the feeding speed is increased, the feeding amount is increased, and the feeding time is shortened. When the feeding weight is less than 100kg from the total feeding value, the electric push rod 304 pushes the gate 301 to close, and the flow rate becomes smaller. The feeding is accurately controlled at the end of the last feeding to achieve the purpose of fast feeding, shorten the feeding time, and reduce the calculated error and the actual error.

[0028] In a preferred embodiment, the transfer conveyor belt 4 can rotate forward and reverse, and a feed pipe 9 and a replenishing bin 10 are provided on the other side of the transfer conveyor belt 4. The material on this side of the transfer conveyor belt 4 enters the replenishing bin 10 through the feed pipe 9. The replenishing bin 10 is provided with a feeder for precise unloading. A certain amount of mineral material can be stored on the transfer conveyor belt 4. When the weighing bin 2 discharges excessive material, the weighing platform 5 weighs the transfer conveyor belt 4. When the remaining material on the top of the transfer conveyor belt 4 exceeds the weight of the material, the transfer conveyor belt 4 rotates clockwise to send the material into the replenishing bin 10. At the same time, it can also specifically feed material to the replenishing bin 10.

[0029] In a preferred embodiment, the transfer conveyor belt 4 rotates counterclockwise to fill the material into the batching bin 6, and the transfer conveyor belt 4 rotates clockwise to fill the material into the replenishing bin 10 through the discharge pipe 9.

[0030] In a preferred embodiment, the conveying direction of the batching conveyor belt 8 first receives the material from the batching bin 6 and then receives the material from the replenishing bin 10. A front-group weighing sensor 11 and an error weighing sensor 12 are provided at the bottom of the batching conveyor belt 8. The front-group weighing sensor 11 weighs and detects the weight of the mineral materials already on the batching conveyor belt 8 before adding the mineral materials. The error weighing sensor 12 weighs and detects the weight of the mineral materials after adding the mineral materials to the batching bin 6. If the weight is less than the batching ratio or the batching weight, the replenishing bin 10 accurately replenishes the material with the help of a feeder to reach the target amount.

[0031] In a preferred embodiment, a vibrating feeder 7 is provided at the discharge end of the batching bin 6. The vibrating feeder is suitable for the feeding system of the metal and coal industries. The material in the bin is evenly discharged onto the belt conveyor through the feeder to form a material layer of appropriate thickness and width.

[0032] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0033] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An automatic batching system for a submerged arc furnace using a weight loss method, comprising a PLC terminal, a ore bin (1) and a batching conveyor belt (8), wherein a weighing bin (2) is installed at the bottom of the ore bin (1). It is characterized in that The bottom of the weighing bin (2) is provided with a transfer conveyor belt (4), a batching bin (6) and a batching conveyor belt (8) in sequence. The weighing bin (2), the transfer conveyor belt (4) and the batching bin (6) are all provided with weighing sensors. A weighing platform (5) for weighing the weight of the remaining materials is also provided at the bottom of the transfer conveyor belt (4).

2. The automatic batching system for submerged arc furnace by weight loss method according to claim 1, It is characterized in that The bottom of the weighing bin (2) is bucket-shaped and is equipped with a material control mechanism (3): The material control mechanism (3) comprises a gate (301), a rotating shaft (302), a gate seat (303), an electric push rod (304) and a bin seat (305); the gate (301) is rotatably mounted at the discharge end of the weighing bin (2) via the rotating shaft (302); the gate seat (303) is mounted on the gate (301); the bin seat (305) is mounted on the weighing bin (2); a rotatable electric push rod (304) is mounted between the gate seat (303) and the bin seat (305); the electric push rod (304) contracts to pull the gate (301) to open and close to control the flow rate.

3. The automatic batching system for submerged arc furnace by weight loss method according to claim 1 or 2, It is characterized in that The transfer conveyor belt (4) can rotate forward and reverse, and a feed discharge pipe (9) and a feed replenishment bin (10) are provided on the other side of the transfer conveyor belt (4). The material on this side of the transfer conveyor belt (4) enters the feed replenishment bin (10) through the feed discharge pipe (9), and the feed replenishment bin (10) is provided with a feed discharger for accurate material discharge.

4. The automatic batching system for submerged arc furnace by weight loss method according to claim 3, It is characterized in that The transfer conveyor belt (4) rotates counterclockwise to fill the material into the batching bin (6), and the transfer conveyor belt (4) rotates clockwise to fill the material into the replenishing bin (10) through the discharge pipe (9).

5. The automatic batching system for submerged arc furnace by weight loss method according to claim 3, It is characterized in that The conveying direction of the batching conveyor belt (8) is to first receive materials from the batching bin (6) and then receive materials from the replenishing bin (10). A front weighing sensor (11) and an error weighing sensor (12) are provided at the bottom of the batching conveyor belt (8).

6. The automatic batching system for submerged arc furnace by weight loss method according to claim 1, It is characterized in that A vibrating feeder (7) is provided at the feed discharge end of the batching bin (6).

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