Efficient classification treatment device for titanium dioxide crude products

Abstract

The utility model relates to an efficient titanium dioxide crude product classification treatment device which is characterized in that a discharge port of a bucket elevator is connected with an inlet electric three-way valve through a discharge pipe, a first discharge pipe connected with the inlet electric three-way valve is connected into a crude product bin, and a second discharge pipe is connected into a temporary storage bin; a discharging pipe at the bottom of the temporary storage bin is connected with an outlet electric three-way valve, a first material distributing pipe connected with the outlet electric three-way valve is connected into a first magnetic separator, an outlet of the first magnetic separator is connected into a spiral conveyor through a qualified material pipe, and a discharging pipe of the spiral conveyor is connected with an inlet of a bucket elevator; a second material distributing pipe connected with the outlet electric three-way valve is connected into a second magnetic separator, and an outlet of the second magnetic separator is connected with a discharging and packaging system through an unqualified material pipe. The device can quickly isolate abnormal materials from a main production line to enter the temporary storage bin, avoids mixed loading pollution with normal materials, and ensures stable quality of main products.

Description

Technical Field

[0001] This utility model relates to the field of titanium dioxide production technology, specifically to a device for efficiently classifying and processing the crude product produced after titanium dioxide calcination in a rotary kiln when quality fluctuations or abnormal materials occur. Background Technology

[0002] In the titanium dioxide production process, problems such as undercooked materials and fluctuations in conversion rate often occur during the start-up, shutdown, or abnormal operation of the calcination process due to insufficient calcination intensity, resulting in unstable product quality. The traditional method involves discharging the abnormal material from the vent to the ground, cooling it, and then manually bagging and screening it. This method is labor-intensive, carries the risk of burns from high temperatures, and easily introduces foreign impurities, affecting the cleanliness and overall quality stability of the material. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the prior art and provide a high-efficiency sorting and processing device for crude titanium dioxide.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a high-efficiency classification and processing device for crude titanium dioxide, including a crude product bin located downstream of a calcining rotary kiln, characterized in that the discharge port of the bucket elevator is connected to an inlet electric three-way valve through a discharge pipe, the first discharge pipe connected to the inlet electric three-way valve is connected to the crude product bin, and the second discharge pipe connected to the inlet electric three-way valve is connected to a temporary storage bin.

[0005] The discharge pipe at the bottom of the temporary storage silo is connected to the outlet electric three-way valve. The first distribution pipe connected to the outlet electric three-way valve is connected to the first magnetic separator. The outlet of the first magnetic separator is connected to the screw conveyor through the qualified material pipe. The discharge pipe of the screw conveyor is connected to the inlet of the bucket elevator. The second distribution pipe connected to the outlet electric three-way valve is connected to the second magnetic separator. The outlet of the second magnetic separator is connected to the external packaging system through the unqualified material pipe.

[0006] The temporary storage silo has a first sampling port on the discharge pipe at the bottom, a second sampling port on the qualified material pipe, and a third sampling port on the unqualified material pipe.

[0007] The discharge port at the bottom of the temporary storage silo is equipped with an electric slide gate valve, the qualified material pipe is equipped with a first pneumatic slide gate valve, and the unqualified material pipe is equipped with a second pneumatic slide gate valve.

[0008] The electric slide gate valve, the first pneumatic slide gate valve, and the second pneumatic slide gate valve are all interlocked with the control system.

[0009] The inlet electric three-way valve, outlet electric three-way valve, and screw conveyor are all interlocked with the control system. The control system precisely controls the speed of the screw conveyor by adjusting the output frequency of the frequency converter equipped with the screw conveyor, thereby controlling the material conveying volume.

[0010] The crude product bin, temporary storage bin, screw conveyor, and pipes and valves in the device are all made of stainless steel to prevent the generation of magnetic foreign objects.

[0011] The beneficial effects of this invention are as follows: An imported electric three-way valve can quickly isolate abnormal materials from the main production line into a temporary storage silo, preventing contamination from mixing with normal materials and ensuring stable main product quality. Through sampling and testing of the temporary storage materials, the outlet electric three-way valve automatically separates the materials into qualified and unqualified products. Qualified products are returned to the main process via magnetic separation and quantitative blending systems, maximizing material recovery and improving raw material and energy utilization. Unqualified products are directly discharged and packaged after magnetic separation, avoiding material cooling on the ground and manual bagging and screening, reducing dust pollution and the risk of foreign object introduction, improving the on-site environment, and completely eliminating safety risks such as burns from manual handling of high-temperature abnormal materials, significantly reducing the labor intensity and occupational health hazards for workers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention;

[0013] In the diagram: 1- Bucket elevator, 2- Inlet electric three-way valve, 3- Crude product bin, 4- Temporary storage bin, 5- First sampling port, 6- Outlet electric three-way valve, 7- First magnetic separator, 71- Qualified material pipe, 8- Second magnetic separator, 81- Unqualified material pipe, 9- Screw conveyor, 10- Second sampling port, 11- Third sampling port; F- Electric slide gate valve, F1- First pneumatic slide gate valve, F2- Second pneumatic slide gate valve. Detailed Implementation

[0014] See Figure 1 A high-efficiency sorting and processing device for crude titanium dioxide includes a crude product bin 3 located downstream of a calcining rotary kiln. The device is characterized in that the discharge port of the bucket elevator 1 is connected to an inlet electric three-way valve 2 via a discharge pipe. The first discharge pipe connected to the inlet electric three-way valve 2 is connected to the crude product bin 3, and the second discharge pipe connected to the inlet electric three-way valve 2 is connected to a temporary storage bin 4.

[0015] The discharge pipe at the bottom of the temporary storage silo 4 is connected to the outlet electric three-way valve 6. The first distribution pipe connected to the outlet electric three-way valve 6 is connected to the first magnetic separator 7. The outlet of the first magnetic separator 7 is connected to the screw conveyor 9 through the qualified material pipe 71. The discharge pipe of the screw conveyor 9 is connected to the inlet of the bucket elevator 1. The second distribution pipe connected to the outlet electric three-way valve 6 is connected to the second magnetic separator 8. The outlet of the second magnetic separator 8 is connected to the external discharge packaging system through the unqualified material pipe 81.

[0016] The temporary storage silo 4 has a first sampling port 5 on the discharge pipe at the bottom, a second sampling port 10 on the qualified material pipe 71, and a third sampling port 11 on the unqualified material pipe 81.

[0017] The discharge port at the bottom of the temporary storage silo 4 is equipped with an electric slide gate valve F, the qualified material pipe 71 is equipped with a first pneumatic slide gate valve F1, and the unqualified material pipe 81 is equipped with a second pneumatic slide gate valve F2.

[0018] The electric slide gate valve F, the first pneumatic slide gate valve F1, and the second pneumatic slide gate valve F2 are all interlocked with the control system.

[0019] The inlet electric three-way valve 2, the outlet electric three-way valve 6, and the screw conveyor 9 are all interlocked with the control system. The control system precisely controls the speed of the screw conveyor 9 by adjusting the output frequency of the frequency converter equipped with the screw conveyor 9, thereby controlling the material conveying volume.

[0020] The crude product bin 3, temporary storage bin 4, screw conveyor 9, and pipes and valves in the device are all made of stainless steel to prevent the generation of magnetic foreign objects.

[0021] (I) Work Process

[0022] When quality fluctuations or abnormal conditions occur in the rotary kiln calcination process (judged by the operator or triggered by online detection alarm), the operator inputs a command through the control system. The control system, based on the received signal, controls the inlet electric three-way valve 2 to switch it to the second discharge pipe, so that the abnormal coarse product produced by the rotary kiln enters the temporary storage silo 4 for temporary storage and isolation to prevent contamination of normal materials.

[0023] The control system simultaneously opens the electric slide gate valve F, and the operator takes a sample through the first sampling port 5 and measures the key quality indicator of the material—rutile conversion rate. The measured value is then input into the control system, which has a preset qualified threshold (rutile conversion rate ≥ 95%).

[0024] If the input value is greater than or equal to the preset qualified threshold, the control system determines that the material is a qualified product that can be optimized for remixing. The control system then controls the outlet electric three-way valve 6 to switch it to the first distribution pipe and simultaneously opens the first pneumatic slide valve FI. After the material enters the first magnetic separator 7 to remove magnetic foreign objects, it enters the bucket elevator 1 through the discharge pipe of the screw conveyor 9 and is then remixed into the coarse product bin 3.

[0025] If the input conversion rate is less than the preset acceptable threshold, the control system determines that the material is unqualified and needs to be discharged and packaged. The control system switches the outlet electric three-way valve 6 to the second distribution pipe and simultaneously opens the second pneumatic gate valve F2. After the material enters the second magnetic separator 8 to remove magnetic foreign objects, it enters the packaging process. Samples are periodically taken from the third sampling port 11 to confirm whether the material quality meets the standards. If it does, the outlet electric three-way valve 6 is switched back to the first distribution pipe, and the material enters the remixing pipeline.

[0026] (ii) Intelligent control of the reintroduction of qualified materials

[0027] When the material is determined to be qualified and enters the screw conveyor 9, the control system activates the remixing adjustment function. The control system stores preset remixing ratio rules. The control system converts the calculated target conveying volume into a control signal (usually adjusting the output frequency) for the screw conveyor 9's drive motor inverter, thereby precisely controlling the screw conveyor 9's speed to ensure it conveys according to the target value. After being quantitatively conveyed by the screw conveyor 9, the material enters the bucket elevator 1 and is evenly mixed into the mainstream material in the coarse product bin 3. During the remixing process, operators can conduct random sampling and monitoring of the material before remixing through the second sampling port 10.

[0028] (III) Recovery Process

[0029] Once the rotary kiln returns to normal operation and the quality of the output material stabilizes, the operator inputs a command through the control system. The control system then controls the inlet electric three-way valve 2 to switch it back to the first discharge pipe, allowing the rotary kiln's crude material to directly enter the crude product bin 3, thus restoring the normal production process.

Claims

1. A high-efficiency sorting and processing device for crude titanium dioxide, comprising a crude product bin (3) located downstream of a calcining rotary kiln, characterized in that, The discharge port of the bucket elevator (1) is connected to the inlet electric three-way valve (2) through the discharge pipe. The first discharge pipe connected to the inlet electric three-way valve (2) is connected to the coarse product bin (3), and the second discharge pipe connected to the inlet electric three-way valve (2) is connected to the temporary storage bin (4). The discharge pipe at the bottom of the temporary storage silo (4) is connected to the outlet electric three-way valve (6). The first distribution pipe connected to the outlet electric three-way valve (6) is connected to the first magnetic separator (7). The outlet of the first magnetic separator (7) is connected to the screw conveyor (9) through the qualified material pipe (71). The discharge pipe of the screw conveyor (9) is connected to the inlet of the bucket elevator (1). The second distribution pipe connected to the outlet electric three-way valve (6) is connected to the second magnetic separator (8). The outlet of the second magnetic separator (8) is connected to the external discharge packaging system through the unqualified material pipe (81).

2. The high-efficiency sorting and processing device for crude titanium dioxide as described in claim 1, characterized in that, The temporary storage silo (4) has a first sampling port (5) on the discharge pipe at the bottom, a second sampling port (10) on the qualified material pipe (71), and a third sampling port (11) on the unqualified material pipe (81).

3. The high-efficiency sorting and processing device for crude titanium dioxide as described in claim 1 or 2, characterized in that, The discharge port at the bottom of the temporary storage silo (4) is equipped with an electric slide gate valve (F), the qualified material pipe (71) is equipped with a first pneumatic slide gate valve (F1), and the unqualified material pipe (81) is equipped with a second pneumatic slide gate valve (F2).

4. The high-efficiency sorting and processing device for crude titanium dioxide as described in claim 3, characterized in that, The electric slide gate valve (F), the first pneumatic slide gate valve (F1), and the second pneumatic slide gate valve (F2) are all interlocked with the control system.

5. The high-efficiency sorting and processing device for crude titanium dioxide as described in claim 1, characterized in that, The inlet electric three-way valve (2), outlet electric three-way valve (6), and screw conveyor (9) are all interlocked with the control system. The control system precisely controls the speed of the screw conveyor (9) by adjusting the output frequency of the frequency converter equipped with the screw conveyor (9), thereby controlling the material conveying volume.

6. The high-efficiency sorting and processing device for crude titanium dioxide as described in claim 1, characterized in that, The crude product bin (3), temporary storage bin (4), screw conveyor (9), and pipes and valves in the device are all made of stainless steel to prevent the generation of magnetic foreign objects.

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