Continuous feeding and metering device for high-temperature materials of smelting furnace

Abstract

The utility model discloses a smelting furnace high temperature material continuous feeding metering device which comprises a feeding bin, discharging mechanisms, a metering bin and a spiral conveyer, the feeding bin is provided with a plurality of first discharging ports, each first discharging port is provided with one discharging mechanism, and the metering bin is provided with a plurality of second discharging ports. The discharging mechanism is connected with the spiral conveyer through the metering stock bin, and the inner walls of the feeding stock bin, the metering stock bin and the spiral conveyer are all coated with refractory castable. By adopting the feeding bin, the discharging mechanism, the metering bin and the spiral conveyor, the problems that the extensive high-temperature materials cannot be metered in real time and cannot be continuously and uniformly fed at present can be solved, so that the smelting furnace condition can be stabilized, and the smelting efficiency and the smelting technical index can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-ferrous metallurgy, in particular to a continuous feeding and metering device for high-temperature materials in a smelting furnace. Background Art

[0002] Nickeliferous laterite ore is an ore formed by the long-term weathering, leaching and metamorphism of nickel-bearing peridotite in tropical or subtropical regions. The nickeliferous laterite ore has a relatively high water content and generally needs to be subjected to a drying pretreatment to remove the remaining free water and crystal water in the ore. The nickeliferous laterite ore after the drying pretreatment is high-temperature calcined ore. The high-temperature calcined ore is sieved to remove lumps, canned into a heat-insulated storage bin, sent to a heat-insulated bin at the furnace top and sent to the smelting furnace for smelting through a feeding chute.

[0003] However, the existing high-temperature calcined ore is roughly added to the smelting furnace through a feeding chute, which cannot achieve continuous, uniform and stable feeding, nor can it be metered in real time. As a result, it is not easy to accurately control the high-temperature calcined ore entering the smelting furnace, and it is not easy to control the addition amounts of fuels, fluxes, reducing agents, etc. participating in the smelting reaction, thereby resulting in a relatively low smelting efficiency and large fluctuations in the composition of the flue gas volume. Summary of the Invention

[0004] Therefore, the purpose of the utility model is to provide a continuous feeding and metering device for high-temperature materials in a smelting furnace to solve at least one of the above technical problems.

[0005] The utility model provides a continuous feeding and metering device for high-temperature materials in a smelting furnace, which includes a feeding bin, a discharging mechanism, a metering bin and a screw conveyor. A plurality of first discharge ports are provided on the feeding bin, and the discharging mechanism is provided at each first discharge port. The discharging mechanism is connected to the screw conveyor through the metering bin. The inner walls of the feeding bin, the metering bin and the screw conveyor are all coated with refractory castables.

[0006] In some embodiments, the screw conveyor includes a cylinder body, a screw pipe shaft arranged in the cylinder body, and a third feed port and a third discharge port arranged on the cylinder body. The third feed port is connected to a second discharge port arranged on the metering bin, and the third discharge port is connected to a feeding port arranged on the smelting furnace. Water inlet rotary joints and water outlet rotary joints communicating with the screw pipe shaft are respectively arranged at both ends of the screw pipe shaft.

[0007] In some embodiments, a plurality of weighing sensors are circumferentially and uniformly distributed inside the metering bin.

[0008] In some embodiments, a plurality of supporting lugs for supporting the weighing sensors are circumferentially and uniformly distributed inside the metering bin.

[0009] In some embodiments, an upper line and a lower line are provided on the metering bin, and the weighing sensor is disposed between the upper line and the lower line.

[0010] In some embodiments, the discharging mechanism includes a control valve and a high-temperature resistant flexible connection. Two ends of the control valve are respectively connected to the high-temperature resistant flexible connection and the first discharge port, and the high-temperature resistant flexible connection is connected to a second feed port provided on the metering bin.

[0011] In some embodiments, the control valve is a dome valve.

[0012] In some embodiments, the high-temperature resistant flexible connection is a high-temperature resistant expansion joint or a high-temperature resistant hose.

[0013] In some embodiments, the temperature of the high-temperature material is set to 400°C to 800°C.

[0014] In some embodiments, the particle size of the high-temperature material is set to 0.1 mm to 30 mm.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) By adopting a feeding bin, a discharging mechanism, a metering bin and a screw conveyor, the problem that the current high-temperature materials are in a rough state and cannot be metered in real time and cannot be continuously and evenly fed can be overcome, thereby contributing to stabilizing the smelting furnace condition, improving the smelting efficiency and smelting technical indexes.

[0017] (2) By directly supplying high-temperature materials with extremely low moisture content to the smelting furnace, it not only helps to reduce the amount of smelting flue gas, effectively reduce the investment in flue gas treatment equipment, but also helps to reduce the amount of pre-fuel used and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a continuous feeding and metering device for high-temperature materials of a smelting furnace according to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To better understand the present utility model, more detailed descriptions will be made for various aspects of the present utility model with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the embodiments of the present utility model, and do not limit the scope of the present utility model in any way. It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature, and do not represent any limitation on the features.

[0021] It should also be understood that the terms "comprising", "comprises", "having", "including" and / or "includes", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.

[0022] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It should also be understood that terms (such as those defined in common dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0023] Please refer to Figure 1 , an embodiment of the present utility model provides a continuous feeding and metering device for high-temperature materials of a smelting furnace, which is applicable to the metering and continuous and uniform supply of high-temperature materials to a smelting furnace in the field of non-ferrous metallurgy technology. Among them, the high-temperature material is high-temperature calcine, and the temperature range of the high-temperature material is within 400°C to 800°C, and the particle size range is within 0.1 mm to 30 mm.

[0024] Specifically, a continuous feeding and metering device for high-temperature materials of a smelting furnace proposed by an embodiment of the present utility model includes a feeding bin 10, a discharging mechanism 20, a metering bin 30 and a screw conveyor 40. Among them, a plurality of discharging mechanisms 20 are detachably installed at the bottom of the feeding bin 10, a metering bin 30 is detachably installed at the bottom of each discharging mechanism 20, a screw conveyor 40 is detachably installed at the bottom of each metering bin 30, and a plurality of screw conveyors 40 can continuously and uniformly supply the high-temperature materials flowing through the feeding bin 10, the discharging mechanism 20 and the metering bin 30 to the smelting furnace.

[0025] In some embodiments, a first feeding port and a plurality of first discharging ports 11 are provided on the feeding bin 10. In this embodiment, a first feeding port and at least two first discharging ports 11 are provided on the feeding bin 10, and the high-temperature materials can enter the feeding bin 10 through the first feeding port and flow out of the feeding bin 10 from at least two first discharging ports 11. Further, the inner wall of the feeding bin 10 is coated with refractory castable, which is an amorphous refractory material made of refractory materials added with a certain amount of binder, in granular and powder form and formed by casting. It can be used to protect the feeding bin 10 to avoid being damaged by high-temperature materials, thereby extending the service life of the feeding bin 10.

[0026] In some embodiments, the feeding mechanism 20 includes a control valve 21 and a high-temperature resistant flexible connection 22. The two ends of the control valve 21 are respectively detachably connected to the top of the high-temperature resistant flexible connection 22 and the bottom of the first discharge port 11, and the high-temperature resistant flexible connection 22 is detachably connected to the top of the metering bin 30. Further, the control valve 21 is provided as a dome valve, which can be opened or closed according to the amount of high-temperature materials in the metering bin 30; when the dome valve is opened, the high-temperature materials in the feeding bin 10 can flow through the high-temperature resistant flexible connection 22 into the metering bin 30; when the dome valve is closed, the high-temperature materials in the feeding bin 10 can be physically isolated from the high-temperature materials in the metering bin 30, and the feeding bin 10 can be sealed to ensure airtightness. Furthermore, the high-temperature resistant flexible connection 22 is provided as a high-temperature resistant expansion joint or a high-temperature resistant hose. In this embodiment, the high-temperature resistant flexible connection 22 adopts a high-temperature resistant hose, which can be used to eliminate the influence on the loss-in-weight metering of the metering bin 30 when the high-temperature materials in the feeding bin 10 flow through the high-temperature resistant flexible connection 22 into the metering bin 30, so that the supply of high-temperature materials to the metering bin 30 can be more accurate.

[0027] In some embodiments, a second feed port 31, a second discharge port 32, a plurality of support lugs and a plurality of weighing sensors 33 are provided on the metering bin 30. The second feed port 31 is provided at the top of the metering bin 30, and the second feed port 31 can be detachably connected to the high-temperature resistant flexible connection 22 so that the high-temperature materials in the feeding bin 10 can flow through the high-temperature resistant flexible connection 22 into the metering bin 30; the second discharge port 32 is provided at the bottom of the metering bin 30, and the second discharge port 32 can be detachably connected to the screw conveyor 40; a plurality of support lugs are fixedly installed circumferentially on the inner wall of the metering bin 30, and a weighing sensor 33 is installed on each support lug to be used for weighing the metering bin 30, so as to determine the weight loss of the metering bin 30. Further, an upper line and a lower line are provided on the metering bin 30, and the upper line and the lower line can be used to determine the amount of high-temperature materials in the metering bin 30 and the timing of adding high-temperature materials to the metering bin 30 or stopping adding high-temperature materials. At the same time, the weighing sensors are installed between the upper line and the lower line to accurately measure the amount of high-temperature materials in the metering bin 30. Furthermore, the inner wall of the metering bin 30 is also coated with refractory castable, which can be used to protect the metering bin 30 to avoid being damaged by high-temperature materials, so as to extend the service life of the metering bin 30.

[0028] In other embodiments, no upper line and lower line are provided on the metering bin 30, and the upper line and the lower line are set by the control system in the non-ferrous metallurgy equipment, and the control system determines the timing of adding high-temperature materials to the metering bin 30 or stopping adding high-temperature materials.

[0029] In some embodiments, the screw conveyor 40 includes a third feed inlet 41, a third discharge outlet 42, a cylinder body 43, and a screw pipe shaft 44. Among them, the third feed inlet 41 is provided at one end of the cylinder body 43 and can communicate with the cylinder body 43. The third feed inlet 41 can be detachably connected to the second discharge outlet 32 so that the high-temperature material in the metering bin 30 enters the screw conveyor 40; the third discharge outlet 42 is provided at the other end of the cylinder body 43 and can communicate with the cylinder body 43. The third discharge outlet 42 can be connected to the feed inlet provided on the smelting furnace so that the high-temperature material in the screw conveyor 40 enters the smelting furnace through the feed inlet; the inner wall of the cylinder body 43 is also coated with refractory castable, which can be used to protect the screw conveyor 40 to prevent the screw conveyor 40 from being damaged by high-temperature materials, thereby extending the service life of the screw conveyor 40; a screw pipe shaft 44 is rotatably installed in the cylinder body 43. Water inlet rotary joints and water outlet rotary joints that can communicate with the screw pipe shaft 44 are respectively installed at both ends of the screw pipe shaft 44. The water inlet rotary joint and the water outlet rotary joint can be respectively connected to the water inlet pipe and the water outlet pipe in the circulating water system of non-ferrous metallurgy equipment so that cooling water circulates in the screw pipe shaft 44, thereby protecting the screw pipe shaft 44 to prevent the screw pipe shaft 44 from deforming due to the transportation of high-temperature materials, and further ensuring the continuous and uniform supply of high-temperature materials.

[0030] The working process of the present utility model is as follows: In practical applications, the screw conveyor 40 is turned on, and the instantaneous feeding amount required for the screw conveyor 40 (i.e., the rotation speed of the screw conveyor 40) is set through the control system in the non-ferrous metallurgy equipment; the amount of high-temperature material in the metering bin 30 is determined according to the upper limit line and the lower limit line on the metering bin 30, and the timing of adding high-temperature material to the metering bin 30 or stopping adding high-temperature material is determined. When the high-temperature material is at the lower limit line, the control system controls the dome valve to open, and the high-temperature material is replenished to the metering bin 30 by the feeding bin 10. When the high-temperature material reaches the upper limit line, the control system controls the dome valve to close; in this way, precise metering of the high-temperature material can be realized by the metering bin 30, and the high-temperature material can be continuously and evenly supplied to the smelting furnace by the screw conveyor 40.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0032] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A continuous feeding and metering device for high-temperature materials in a smelting furnace, characterized in that, It includes a feeding bin, a discharging mechanism, a metering bin and a screw conveyor. A number of first discharge openings are provided on the feeding bin, and the discharging mechanism is provided at each of the first discharge openings. The discharging mechanism is connected to the screw conveyor through the metering bin. The inner walls of the feeding bin, the metering bin and the screw conveyor are all coated with refractory castables.

2. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 1, characterized in that The screw conveyor includes a cylinder body, a screw pipe shaft arranged in the cylinder body, and a third feed inlet and a third discharge outlet arranged on the cylinder body. The third feed inlet is connected to a second discharge outlet arranged on the metering bin, and the third discharge outlet is connected to a feed inlet arranged on the smelting furnace. Water inlet rotary joints and water outlet rotary joints communicating with the screw pipe shaft are respectively arranged at both ends of the screw pipe shaft.

3. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 1, wherein A plurality of weighing sensors are circumferentially and uniformly distributed inside the metering bin.

4. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 3, wherein A plurality of lugs supporting the weighing sensors are circumferentially and uniformly distributed inside the metering bin.

5. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 3, characterized in that, An upper line and a lower line are provided on the metering bin, and the weighing sensors are arranged between the upper line and the lower line.

6. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 1, characterized in that, The discharging mechanism includes a control valve and a high-temperature resistant flexible connection. Both ends of the control valve are respectively connected to the high-temperature resistant flexible connection and the first discharge opening, and the high-temperature resistant flexible connection is connected to a second feed inlet arranged on the metering bin.

7. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 6, wherein, The control valve is a dome valve.

8. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 6, wherein, The high-temperature resistant flexible connection is a high-temperature resistant expansion joint or a high-temperature resistant hose.

9. The continuous feeding and metering device for high-temperature materials of the smelting furnace according to claim 1, wherein The temperature of the high-temperature material is set to 400°C to 800°C.

10. The continuous feeding and metering device for high-temperature materials of a smelting furnace according to any one of claims 1 to 9, characterized in that, The particle size of the high-temperature material is set to 0.1 mm to 30 mm.

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