Bulk zinc-containing feed material delivery device

Abstract

This utility model discloses a device for feeding large blocks of zinc-containing raw materials, relating to the field of raw material feeding technology. It is used to feed raw material blocks into a melting crucible. The melting crucible has a protective cover at its opening, including a support. A transfer trolley, positioned laterally above the protective cover, is mounted on the support. A lifting chain is installed on the transfer trolley, with a lifting controller between the upper end of the chain and the transfer trolley. The lower end of the chain has a lifting structure for holding the raw material blocks. The protective cover has a transfer and clearance channel corresponding to the chain and the lifting structure. This utility model improves the controllability of raw material feeding, helps reduce melting rate fluctuations and ensure product quality, reduces raw material waste, and improves the safety of the feeding operation.

Description

Technical Field

[0001] This utility model relates to the field of raw material feeding technology, and in particular to a device for feeding large pieces of zinc-containing raw materials. Background Technology

[0002] In the indirect zinc oxide production process, a melting crucible and an evaporation crucible are arranged inside the kiln. The melting crucible is used to add zinc-containing raw materials, and the molten zinc formed in the melting crucible flows into the evaporation crucible, where it is heated to high temperature and turns into zinc vapor. The zinc vapor is then sprayed through nozzles on the evaporation crucible into the oxidation chamber above, where it reacts with oxygen in the air to form zinc oxide particles. These particles are then carried by wind to a collection device for collection, yielding indirect zinc oxide. Currently, due to cost considerations, zinc-containing raw materials such as zinc slag are often used for zinc oxide production. These zinc-containing raw materials are waste products generated in fields such as metal surface treatment, and are all melted into large blocks for storage and transportation. The size and shape of the zinc-containing raw material molten blocks produced by different fields and companies vary. Before use in zinc oxide production, they all need to be cut into small pieces with a volume of less than 2 cubic decimeters. Therefore, on the production site, materials can be manually added to the melting crucible using tools such as shovels.

[0003] This raw material feeding process has several shortcomings. First, the cutting of zinc-containing raw materials such as zinc slag into molten blocks is done using a circular saw. The resulting debris is uncollectible waste, and cutting large molten blocks into smaller pieces is labor-intensive and wasteful of raw materials. According to production statistics, approximately 50 kg of material is wasted per cubic meter of zinc slag during cutting. Second, manual feeding of the material blocks can lead to molten metal splashing, posing a high safety risk. Third, the feeding of the material blocks is a one-time operation, and the blocks melt freely at the bottom of the melting crucible. The melting rate is uncontrolled, and the temperature inside the melting crucible fluctuates rapidly, resulting in large fluctuations in the amount of zinc slag melted per unit time. This, in turn, leads to large fluctuations in the flow rate of molten zinc into the evaporation crucible, causing unstable zinc vapor injection pressure and affecting product quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a device for feeding large blocks of zinc raw materials, which improves the controllability of raw material feeding, helps reduce melting rate fluctuations and ensure product quality, and also helps reduce raw material waste and improve the safety of feeding operation.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a large zinc-containing raw material feeding device, used to feed raw material blocks into a melting crucible. The melting crucible is covered with a protective cover, including a support. A transfer cart, which is set higher than the protective cover, is movably mounted on the support. A lifting chain is installed on the transfer cart. A lifting controller is provided between the upper end of the lifting chain and the transfer cart. A lifting structure for holding the raw material block is provided at the lower end of the lifting chain. The protective cover is provided with a transfer and avoidance channel corresponding to the lifting chain and the lifting structure.

[0006] As a preferred technical solution, the transfer and avoidance channel includes a feeding port provided on the side wall of the protective cover, and a feeding door is installed at the feeding port; the top wall of the protective cover is provided with a transverse avoidance opening that connects to the feeding port.

[0007] As a preferred technical solution, the lifting structure includes two X-shaped lifting rods, which are hinged together at their intersection by a hinge pin; the lower ends of the two lifting rods are respectively fixed with opposing lifting claws, the lower end of the lifting chain is equipped with a hook, and the upper ends of the two lifting rods are connected by a pulling chain hanging on the hook.

[0008] As a preferred technical solution, the lifting controller includes a guide sprocket rotatably mounted on the material transfer trolley, a chain bag is installed on one side of the guide sprocket on the material transfer trolley, the chain bag is used to store the lifting chain, the lifting chain passes around the guide sprocket, and a lifting control motor is provided between the guide sprocket and the material transfer trolley.

[0009] As a preferred technical solution, the protective cover is equipped with a dust removal pipe.

[0010] By adopting the above technical solution, a large-block zinc raw material feeding device is used to feed raw material blocks into a melting crucible. The melting crucible is covered with a protective cover, including a support. A transfer trolley, positioned laterally above the protective cover, is mounted on the support. A lifting chain is installed on the transfer trolley, and a lifting controller is located between the upper end of the lifting chain and the transfer trolley. The lower end of the lifting chain has a lifting structure for holding the raw material blocks. The protective cover has a transfer and avoidance channel corresponding to the lifting chain and the lifting structure. This utility model uses a lifting method to replace manual feeding. The lifting controller controls the lowering height of the held raw material blocks, allowing control over the volume of raw material blocks immersed in the molten metal in the melting crucible. This improves the controllability of raw material feeding, helps reduce melting rate fluctuations, and ensures product quality. Furthermore, this invention allows for the direct handling of large blocks of raw materials. Zinc-containing materials such as zinc slag no longer need to be cut into smaller pieces for easy manual handling; they only need to be cut to a size suitable for entering the melting crucible. This significantly reduces the amount of cutting required. Production statistics show that waste from cutting zinc slag is reduced to approximately 10 kg per cubic meter, minimizing material waste. The entire material handling process is smooth, greatly reducing molten metal splashing and improving operational safety. Attached Figure Description

[0011] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0012] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the AA structure;

[0014] Figure 3 yes Figure 1 A schematic diagram of the BB structure with the feeding gate open.

[0015] In the diagram: 1-Support; 2-Transfer trolley; 21-Frame; 22-Walking wheel set; 23-Walking drive motor; 3-Lifting chain; 4-Lifting controller; 5-Lifting structure; 51-Lifting grab bar; 52-Lifting claw; 53-Lifting hook; 54-Holding chain; 6-Transfer and clearance passage; 61-Feeding gate; 62-Horizontal clearance opening; 81-Melting crucible; 82-Evaporation crucible; 83-Upper nozzle; 84-Oxidation chamber; 85-Protective cover; 86-Dust removal pipe; 9-Raw material block. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0017] like Figure 1 , Figure 2 and Figure 3 As shown, the large-piece zinc-containing raw material feeding device is used to feed raw material blocks 9 into the melting crucible 81. These raw material blocks 9 are blocks cut from zinc slag or other zinc-containing raw materials. Of course, for some zinc-containing raw materials that are relatively small in size, they can be used directly as raw material blocks 9. Conventionally, the opening of the melting crucible 81 is open, so a protective cover 85 is provided at the opening of the melting crucible 81 to prevent it from scorching the surrounding environment, reduce the risk of high temperatures, and facilitate the reduction of smoke and dust, as well as the small amount of zinc vapor evaporating from the melting crucible 81, from escaping. Accordingly, a dust removal pipe 86 is installed on the protective cover 85 to guide the dust and gas to relevant dust removal equipment for treatment.

[0018] This device includes a support 1, on which a transfer cart 2, positioned higher than the protective cover 85, is laterally movably mounted. In this embodiment, an I-shaped crossbeam is fixedly mounted on the support 1. The transfer cart 2 includes a frame 21, on which are mounted sets of wheels 22 located on both sides of the I-shaped crossbeam. One set of wheels 22 is connected to a drive motor 23. The transfer cart 2 is driven to move laterally by controlling the drive motor 23. This control can be remote control or a wired handle control; no limitation is made here.

[0019] The material transfer trolley 2 is equipped with a lifting chain 3. A lifting controller 4 is located between the upper end of the lifting chain 3 and the material transfer trolley 2, and a lifting structure 5 for holding the raw material block 9 is located at the lower end of the lifting chain 3. Conventionally, the raw material block 9 is stacked somewhere to the side of the melting crucible 81. After being moved above the stacked area by the material transfer trolley 2, the lifting controller 4 controls the lifting chain 3 to be lowered, and the raw material block 9 can be manually held using the lifting structure 5. The use of the lifting chain 3 here can improve the flexibility of holding the raw material block 9 within the raw material stack area.

[0020] Then, the lifting controller 4 controls the lifting chain 3 to lift the material, and the material transfer cart 2 moves above the melting crucible 81. Preferably, the protective cover 85 is provided with a transfer clearance channel 6 corresponding to the lifting chain 3 and the lifting structure 5 to ensure that the raw material block 9 can smoothly reach above the melting crucible 81.

[0021] Finally, the lifting controller 4 controls the lowering of the lifting chain 3 until the raw material block 9 begins to be immersed in the melting crucible 81. During this process, the immersion volume of the raw material block 9 can be actively controlled by the lowering height. Therefore, the gradual addition of the large volume of raw material block 9 creates a gradual addition effect. Furthermore, because the subsequently added volume is always in a preheated state, the entire process of adding the large volume of raw material block 9 helps reduce temperature fluctuations within the melting crucible 81 and allows for a certain degree of active control over the melting rate per unit time within the melting crucible 81. This, in turn, ensures a relatively stable flow rate of zinc liquid entering the evaporation crucible 82, and a relatively stable zinc vapor injection pressure. Consequently, the oxygen supply at the oxidation chamber 84 and the amount of injected zinc vapor can maintain a basic match, ensuring the oxidation rate and product quality. Moreover, the stable oxidation reaction temperature allows the generated zinc oxide particles to smoothly enter the conveying channel and reach the collection device for collection.

[0022] In addition, during the above-mentioned feeding process, the raw material block 9 is in the state of sealing the mouth of the evaporation crucible 82 for most of the time. The liquid surface area exposed to the air at the mouth of the evaporation crucible 82 is small, which helps to reduce the amount of zinc liquid evaporating at the melting crucible 81, reduce the generation of substandard zinc oxide, and help to increase the yield of high-quality zinc oxide.

[0023] In this embodiment, the lifting structure 5 includes two X-shaped lifting rods 51, which are hinged at their intersection by a hinge pin. The lower ends of the two lifting rods 51 are respectively fixed with opposing lifting claws 52. The lower end of the lifting chain 3 is equipped with a hook 53, and the upper ends of the two lifting rods 51 are connected by a pulling chain 54 hanging on the hook 53. In use, first, open the lower ends of the two lifting rods 51 so that the width of the two lifting claws 52 is greater than the width of the raw material block 9, and place the two lifting claws 52 within the volume range of the raw material block 9. Manually close the two lifting rods 51 and with the holding chain 54 hanging on the hook 53, control the lifting with the lifting controller 4. The holding of the holding chain 54 naturally generates the force of the two lifting claws 52 biting the raw material block 9. After the raw material block 9 is lifted, the weight of the raw material block 9 will increase the tension of the holding chain 54, thereby ensuring the stability of the raw material block 9 after it is lifted.

[0024] During this process, the holding chain 54 is attached to the hook 53, allowing relative movement between the holding chain 54 and the hook 53. Thus, after lifting the raw material block 9, the holding chain 54 can adapt to the movement of the raw material block 9's center of gravity, keeping it directly below the hook 53. This center-of-gravity holding effect persists even as the raw material block 9 gradually melts during the feeding process. Therefore, the lifting structure 5 can maintain a stable lifting effect throughout the entire process, preventing the raw material block 9 from falling. Preferably, the lifting claw 52 has a two-fingered claw structure, allowing the two claws 52 to form a multi-point grip, further ensuring lifting stability. The lifting structure 5 is preferably made of steel. Given the melting temperature of only 600-700°C at the melting crucible 81, the high melting point of steel is unaffected, allowing it to maintain the lifting effect on the last portion of the raw material block 9 while partially submerged in the solution, achieving the goal of controllable feeding throughout the entire process in this embodiment.

[0025] The transfer and avoidance channel 6 includes a feeding port on the side wall of the protective cover 85, and a feeding door 61 is installed at the feeding port. The top wall of the protective cover 85 has a transverse avoidance opening 62 communicating with the feeding port. When feeding raw material block 9, the feeding door 61 opens. During the transverse movement of the transfer cart 2, the lifting chain 3 enters the transverse avoidance opening 62, while the lifting structure 5 and the raw material block 9 pass through the feeding port and reach above the melting crucible 81. Then, the feeding door 61 closes, maintaining a relatively isolated space environment at the protective cover 85. Preferably, the feeding door 61 is provided with an observation window to facilitate observation of the feeding of raw material block 9 when closed. After the current raw material block 9 has been fed, the lifting structure 5 is raised, the feeding door 61 is opened, and the next raw material block 9 can be fed.

[0026] The lifting controller 4 includes a guide sprocket rotatably mounted on the transfer trolley 2. A chain bag is installed on one side of the guide sprocket on the transfer trolley 2. The chain bag is used to store the lifting chain 3. The lifting chain 3 passes around the guide sprocket. A lifting control motor is provided between the guide sprocket and the transfer trolley 2. Controlling the lifting control motor to drive it forward or reverse can drive the lower lifting chain 3 or raise the lifting chain 3. This structural principle is easily understood by those skilled in the art in conjunction with existing electric hoists, and will not be elaborated further here. The control of the lifting control motor can be remote control or handle wire control, which is not limited here.

[0027] This embodiment uses a hoisting method to replace manual feeding. The hoisted raw material block 9 is lowered at a height controlled by the hoisting controller 4, allowing for control over the volume of the raw material block 9 submerged in the molten metal in the melting crucible 81. This improves the controllability of raw material feeding, reduces melting rate fluctuations, and ensures product quality. This embodiment can directly hoist large raw material blocks 9, eliminating the need to cut zinc slag and other zinc-containing raw materials into smaller pieces for easy manual feeding. Only pieces large enough to fit into the melting crucible 81 are required, significantly reducing the amount of cutting. According to production statistics, the waste from cutting zinc slag is reduced to approximately 10 kg per cubic meter, minimizing raw material waste. The entire raw material feeding process is smooth, significantly reducing molten metal splashing and improving operational safety.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for feeding large blocks of zinc-containing raw materials into a melting crucible, wherein a protective cover is provided at the mouth of the melting crucible, characterized in that: The device includes a support frame, on which a material transfer trolley is laterally mounted, higher than the protective cover. A lifting chain is installed on the material transfer trolley, and a lifting controller is provided between the upper end of the lifting chain and the material transfer trolley. A lifting structure for holding raw material blocks is provided at the lower end of the lifting chain. The protective cover is provided with a transfer and avoidance channel corresponding to the lifting chain and the lifting structure.

2. The device for feeding large blocks of zinc-containing raw materials as described in claim 1, characterized in that: The transfer and avoidance channel includes a feeding port on the side wall of the protective cover, and a feeding door is installed at the feeding port; the top wall of the protective cover is provided with a transverse avoidance opening that connects to the feeding port.

3. The device for feeding large blocks of zinc-containing raw materials as described in claim 1, characterized in that: The lifting structure includes two X-shaped lifting rods, which are hinged together at their intersection by a hinge pin; the lower ends of the two lifting rods are respectively fixed with opposing lifting claws, the lower end of the lifting chain is equipped with a hook, and the upper ends of the two lifting rods are connected by a pulling chain that is hung on the hook.

4. The device for feeding large blocks of zinc-containing raw materials as described in claim 1, characterized in that: The lifting controller includes a guide sprocket rotatably mounted on the material transfer trolley. A chain bag is installed on one side of the guide sprocket on the material transfer trolley. The chain bag is used to store the lifting chain. The lifting chain passes around the guide sprocket. A lifting control motor is provided between the guide sprocket and the material transfer trolley.

5. The device for feeding large-volume zinc-containing raw materials as described in any one of claims 1 to 4, characterized in that: The protective cover is equipped with a dust removal pipe.

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