Feeding device for reduction smelting furnace

Abstract

The utility model relates to the technical field of smelting furnace equipment, in particular to a feeding device for a reduction smelting furnace. The device comprises a feeding belt, a feeding bin, a feeding trolley and a trolley track, a distributing valve of an electric switch is installed above a feeding port of the feeding bin, the feeding belt is located over the distributing valve, and a vibration feeding screen is arranged at a discharging port of the feeding bin; the trolley track is arranged between the lower portion of the discharging port and the reduction smelting furnace, a truck scale weighing device connected with a weighing instrument is installed on the trolley track, a turning plate is arranged at a furnace opening of the reduction smelting furnace and connected with a photoelectric device, and the feeding belt, the distributing valve, the vibration feeding screen and the weighing instrument are all in electric control connection with a DCS. According to the device, the feeding belt and the material distributing valve are remotely controlled to control feeding, the vibrating feeding screen and the weighing instrument are remotely monitored or controlled to precisely control discharging, meanwhile, the photoelectric device controls opening and closing of the furnace mouth turning plate by detecting the position of the feeding trolley, and the feeding process which saves labor and is precisely controlled is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to smelting furnace equipment technical field, concretely relates to a kind of feeding device for reduction smelting furnace. BACKGROUND

[0002] In the production process of reduction smelting furnace, the required material needs to be accurately and efficiently transported into the smelting furnace to ensure the stability of the smelting furnace condition and meet the requirements of process design. The existing feeding method is to transport the material to the feeding trolley on both sides of the furnace mouth through the metering belt scale after discharging, and then the feeding trolley sends the material into the furnace. Since the smelting furnace has a short feeding interval, the three belts need to run all the time, and the discharging amount of the metering belt scale is not accurate, which affects the stability of the material.

[0003] In the prior art, Chinese patent CN104044928B proposes an automatic feeding method for metallurgical production system, which includes a stock bin, a vibrating screen below the stock bin for weighing the material, a transport trolley with a material basket below the vibrating screen, the transport trolley running on a transport channel, a laser reflector plate installed at the front end of the transport trolley, a laser transmitter, a laser receiver and a position sensor installed at the head end of the transport channel, limit switches installed at the head end and the tail end of the transport channel, and a hoist for lifting the material basket to add material into the furnace. The invention has high automation degree and reduces the influence of human factors on feeding, but the material is weighed by the vibrating screen below the stock bin, which has a difference in weight from the actual material added into the furnace, and the measurement is not accurate. In addition, an additional hoist is needed for feeding, which makes the device complex and high in cost. UTILITY MODEL CONTENT

[0004] To solve the problems in the prior art, the utility model provides a feeding device for reduction smelting furnace, with the specific scheme as follows:

[0005] A feeding device for reduction smelting furnace, which includes a feeding belt, a feeding bin, a feeding trolley and a trolley track. The feeding bin includes a feeding inlet and a discharging outlet, and a distribution valve is installed above the feeding inlet. The distribution valve is an electrically controlled on-off valve. The discharging end of the feeding belt is located directly above the distribution valve, and a vibrating feeder screen is arranged at the discharging outlet of the feeding bin. The trolley track is arranged between the discharging outlet of the feeding bin and the reduction smelting furnace, and a weighing device is installed on the trolley track. The weighing device is connected with a weighing instrument. The feeding trolley moves back and forth on the trolley track, and the feeding trolley is located above the weighing device. A flap is arranged at the furnace mouth of the reduction smelting furnace, and the flap is electrically connected with a photoelectric device. The photoelectric device is arranged at one end of the trolley track close to the reduction smelting furnace. The feeding belt, the distribution valve, the vibrating feeder screen and the weighing instrument are electrically connected with a DCS control system.

[0006] Further, the feeding bin has two, which are a coke bin and a slag bin.

[0007] Further, a material distribution valve track is further included, a vertical surface of the material distribution valve is movably connected to the material distribution valve track, the material distribution valve track is horizontally arranged, and the material distribution valve is horizontally movable along the material distribution valve track.

[0008] Further, the three upper feeding belts are provided.

[0009] Further, the weighing device is a truck scale, and at least six symmetrical weighing sensors are installed on each truck scale.

[0010] Further, the upper feeding trolley is a remote control trolley.

[0011] The upper feeding device for a reduction smelting furnace has the advantages that two upper feeding bins are arranged at the furnace mouth, and after the upper feeding bins are filled with materials, the materials are discharged to the upper feeding trolley through the vibrating screen, so that a storage space for the materials is provided, the three upper feeding belts do not need to run all the time, long-time running of the three upper feeding belts can be avoided, cost is saved, and loss is reduced; the truck scale weighing is installed on the trolley track, the truck scale weighing is more accurate, the accuracy and stability of the materials are ensured, and stable operation of the process is ensured; the upper feeding belt, the material distribution valve, the vibrating feeder screen, and the weighing instrument are electrically connected with the DCS control system, automatic control of upper feeding and material distribution is realized, remote setting and zero clearing of the discharging amount are realized, the discharging amount of the upper feeding trolley is fed back in real time, accurate control of the discharging amount is realized through real-time data feedback of the vibrating feeder screen and the weighing instrument; after the upper feeding trolley reaches the furnace mouth, the photoelectric device receives a signal and controls the flap to be automatically opened, and the flap is automatically closed after the upper feeding trolley leaves; meanwhile, the upper feeding trolley is a remote control trolley, and the staff remotely operates, so that a good working environment for the operators is ensured. Meanwhile, the device has a simple structure, low cost, and good industrial application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0012] The embodiments of the utility model are further described below with reference to the drawings, in which:

[0013] Figure 1 A structure schematic view of the upper feeding device for the reduction smelting furnace is shown;

[0014] Figure 2 A control system logic schematic view of the upper feeding device for the reduction smelting furnace is shown.

[0015] 1 - material distribution valve; 2 - coke bin; 3 - slag bin; 4 - vibrating feeder screen; 5 - upper feeding trolley; 6 - trolley track; 7 - weighing sensor; 8 - furnace mouth of the reduction smelting furnace; 9 - photoelectric device; 10 - weighing instrument. DETAILED DESCRIPTION

[0016] In order to make the utility model purposes, technical solutions and advantages more clearly, the following will be further described in detail by specific embodiments in combination with the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0017] In one embodiment, a feeding device for a reduction smelting furnace comprises three feeding belts, a feeding bin, a feeding trolley 5 and a trolley track 6. The feeding trolley 5 is a remote control trolley. The feeding bin comprises a feeding inlet and a discharging outlet. A distribution valve 1 is installed above the feeding inlet. The distribution valve 1 is an electrically operated on-off valve. The discharging end of the feeding belt is located directly above the distribution valve 1. The vertical surface of the distribution valve 1 is movably connected to a distribution valve track. The distribution valve track is horizontally arranged. The distribution valve can move horizontally on the distribution valve track. The feeding bin comprises a coke bin 2 and a slag bin 3. A vibrating feeder screen 4 is arranged at the discharging outlet of each of the coke bin 2 and the slag bin 3. The trolley track 6 is arranged between the discharging outlet and the reduction smelting furnace. A truck scale is installed on the trolley track 6 as a weighing device. At least six symmetrical weighing sensors 7 are installed on each truck scale. A weighing instrument 10 is connected to the truck scale. A secondary meter display is installed on site to calibrate the weighing sensors 7 of the truck scale and perform other operations. The feeding trolley 5 moves back and forth on the trolley track 6 to receive materials from the discharging outlet and then moves to the furnace opening of the reduction smelting furnace to add materials. The feeding trolley 5 moves above the truck scale. The furnace opening 8 of the reduction smelting furnace is provided with a flap. The flap is electrically connected to a photoelectric device 9 (i.e. a photoelectric switch in the attached drawings). The photoelectric device 9 is arranged at one end of the trolley track 6 close to the reduction smelting furnace. The feeding belt, the distribution valve 1, the vibrating feeder screen 4 and the weighing instrument 10 are electrically connected to a DCS control system. Figure 2

[0018] The truck scale weighing principle is as follows: when the feeding trolley drives onto the weighing platform of the truck scale, the weight of the feeding trolley is evenly transmitted to each weighing sensor through the weighing platform. The sensor converts the weight signal into an electrical signal and transmits it to the weighing instrument for processing and display. After receiving the electrical signal from the weighing sensor, the weighing instrument processes and calculates the signal to obtain the accurate weight of the feeding trolley. At the same time, the weighing instrument can display the weight data and transmit and manage the data through an interface with a third party device.

[0019] ​The specific working process is as follows: coke and slag are transported to coke bin 2 and slag bin 3 through three belts respectively, and the distribution mainly relies on distribution valve 1. Distribution valve 1 uses an electric on-off valve, and the control of the on-off valve is connected to a DCS cabinet to realize remote control and valve position feedback through configuration. There are coke position and slag position buttons in the picture, and the coke position and slag position can be switched through the switching button to control the belt running stop and the horizontal movement of the distribution valve, and there are valve position feedbacks of the coke position and the slag position. A vibrating feeder screen 4 is installed at the bottom of the charging bin, and the vibrating feeder screen is started and stopped and the frequency is controlled through a frequency converter and DCS communication. When the material needs to be discharged, the operator moves the charging trolley 5 to the truck scale on the trolley track 6 through the remote controller, the personnel in the main control room click the zero button on the picture to zero, set the discharge amount this time, start the coke vibrating feeder screen or the slag vibrating feeder screen, and the discharging starts. When the set value is reached, the value fed back to the DCS control system through the weighing instrument 10 controls the vibrating feeder screen to stop. The zeroing and weight feedback are connected to the DCS cabinet through hard wiring from the field control box. When the charging trolley reaches the furnace port, the photoelectric switch senses the charging trolley, and the flap is automatically opened. After the material is poured into the furnace, the charging trolley leaves the furnace port, the flap is automatically closed, and the charging process is completed. The photoelectric switch is connected in series in the control circuit of the flap switch, so as to control the opening and closing of the flap.

[0020] Some example embodiments of the present application are described above, and it can be understood that the above embodiments are only used to explain the present application, and do not constitute a limitation on the protection scope of the present application. The features in these embodiments can be recombined in a suitable manner, and the schemes obtained thereby are still within the protection scope of the present application. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative labor, i.e. all modifications, equivalent replacements and improvements, etc. made within the spirit and principles of the present application, are also within the protection scope of the present application.

Claims

1. A charging device for a reduction smelting furnace, comprising a charging belt, a charging hopper, a charging trolley (5), and a trolley track (6), characterized in that, The feeding hopper includes an inlet and an outlet. A distribution valve (1) is installed above the inlet. The distribution valve (1) is an electrically operated valve. The outlet end of the feeding belt is located directly above the distribution valve (1). A vibrating feed screen (4) is installed at the outlet of the feeding hopper. The trolley track (6) is located below the outlet of the feeding hopper and between the reduction smelting furnace. A weighing device is installed on the trolley track (6). The weighing device is connected to a weighing instrument (10). The feeding trolley (5) moves back and forth on the trolley track (6) and is located above the weighing device. The furnace opening (8) of the reduction smelting furnace is equipped with a flap. The flap is electrically connected to a photoelectric device (9). The photoelectric device (9) is located on the trolley track (6) at one end near the reduction smelting furnace. The feeding belt, the distribution valve (1), the vibrating feed screen (4), and the weighing instrument (10) are all electrically connected to the DCS control system.

2. The feeding device for a reduction smelting furnace according to claim 1, characterized in that, There are two feeding hoppers, namely the coke hopper (2) and the slag hopper (3).

3. The feeding device for a reduction smelting furnace according to claim 2, characterized in that, It also includes a material distribution valve track, the vertical surface of which is movably connected to the material distribution valve track, and the material distribution valve track is horizontally set.

4. The feeding device for a reduction smelting furnace according to claim 2, characterized in that, There are three conveyor belts in total.

5. The feeding device for a reduction smelting furnace according to claim 1, characterized in that, The weighing device is a truck scale, and each truck scale is equipped with at least 6 symmetrical weighing sensors (7).

6. The feeding device for a reduction smelting furnace according to claim 1, characterized in that, The loading trolley (5) is a remote-controlled trolley.

Images