Titanium ash recycling device of titanium dioxide production rotary kiln

Abstract

The utility model relates to a titanium dioxide production rotary kiln titanium ash recycling device which is characterized in that the front section of a spiral feeder penetrates through a protective cover at the kiln tail of a rotary kiln and is arranged in the kiln tail of the rotary kiln, a feeding port is formed in the rear section of the spiral feeder, and the feeding port is correspondingly connected with a feeding hopper; a bottom outlet of the protective cover is correspondingly connected with the material sliding barrel, a vibration magnetic screen is arranged in the material sliding barrel and correspondingly communicated with the titanium ash bin, a titanium ash inlet and an overflow outlet are formed in the spiral discharging device side by side, a bottom outlet of the titanium ash bin is connected with the titanium ash inlet, the overflow outlet is connected with an inlet of the lifting spiral device, and an outlet of the lifting spiral device is connected into the feeding hopper through a recycling material pipe. Titanium ash generated by the rotary kiln is subjected to impurity removal through the vibration magnetic screen, temporarily stored in the titanium ash bin and then conveyed to the kiln tail of the rotary kiln through the spiral discharging device and the lifting spiral device, the magnetic screen of the vibration magnetic screen can adsorb magnetic impurities in the titanium ash and conduct accurate screening, and it is guaranteed that recycled materials are uniform in particle size and stable in quality; the utilization rate of the titanium dioxide raw material is improved.

Description

Technical Field

[0001] This utility model belongs to the field of titanium dioxide production technology, specifically relating to a titanium dioxide production rotary kiln titanium ash recycling device. Background Technology

[0002] In the production of titanium dioxide, the rotary kiln is a key piece of equipment used to calcine the raw materials, causing physical and chemical changes to obtain the desired product. However, a certain amount of ash, also known as titanium ash, is generated during the calcination process. This titanium ash contains unreacted raw materials, impurities, and some granular products that meet quality standards. Traditional processes handle titanium ash in a rather crude and rudimentary way. Some materials are simply discarded as waste, resulting in a huge waste of resources. Others are manually screened, which is not only labor-intensive and time-consuming, but also cannot accurately separate particles of different sizes in the titanium ash, leading to unstable quality of recycled materials, affecting the stability of subsequent production processes and the quality of the final product. Some screening equipment has limited capacity to handle magnetic impurities and other special components when processing titanium ash. These impurities can easily enter the production process, potentially damaging production equipment, shortening its lifespan, and increasing maintenance costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for recycling titanium ash from a rotary kiln used in titanium dioxide production.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a titanium dioxide production rotary kiln titanium ash recycling device, comprising a rotary kiln tail, characterized in that: a protective cover is provided at the end of the rotary kiln tail, the front section of a screw feeder penetrates the protective cover and is located inside the rotary kiln tail, a feed hopper is provided above the rear section of the screw feeder, an inlet is opened on the upper surface of the rear section of the screw feeder, and the inlet is correspondingly connected to the feed hopper; the bottom outlet of the protective cover is correspondingly connected to a chute, a vibrating magnetic screen is provided at the end of the chute, the bottom of the chute is correspondingly connected to a titanium ash silo, a horizontal screw discharger is provided below the titanium ash silo, a titanium ash inlet and an overflow outlet are provided side by side on the top of the screw discharger, the bottom outlet of the titanium ash silo is connected to the titanium ash inlet, the overflow outlet is connected to the inlet of the lower part of the lifting screw through a conveying pipe, the outlet of the upper part of the lifting screw is connected to a recycling pipe, and the end of the recycling pipe is correspondingly connected to the feed hopper.

[0005] A feeder is installed at the bottom of the feed hopper to facilitate smooth material feeding.

[0006] An inspection port is provided on the bottom surface of the screw conveyor, and the inspection port is covered to facilitate opening for inspection or maintenance.

[0007] The vibrating magnetic screen is connected and fixed to the chute at both ends by flanges, which makes it easy to remove the vibrating magnetic screen to clean the material or impurities on the screen.

[0008] The beneficial effects of this utility model are: the titanium ash produced by the rotary kiln is removed by a vibrating magnetic screen through a chute, temporarily stored in a titanium ash silo, and then conveyed to the feed hopper by a screw conveyor and a lifting screw, and automatically added under the action of a feeder.

[0009] The magnetic screen of the vibrating magnetic sieve can effectively adsorb magnetic impurities in titanium dioxide and perform precise screening, ensuring uniform particle size and stable quality of recycled materials, thus improving the utilization rate of titanium dioxide raw materials. It also reduces wear and tear on subsequent production equipment caused by impurities, extending the service life of the equipment.

[0010] The spiral feeder is designed using the overflow principle. When material accumulates to a certain level, excess material is discharged from the overflow outlet. This overflow design helps control the material flow rate and conveying volume, prevents congestion, and also acts as an airlock. Due to the negative pressure of the rotary kiln, it prevents a large amount of air from entering the rotary kiln system with the material conveying, effectively preventing negative pressure leakage and maintaining the temperature of the kiln tail leakage point. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the present invention;

[0012] In the diagram: 1-Rotary kiln tail, 2-Protective cover, 3-Screw feeder, 31-Inlet, 4-Puller, 5-Feed hopper, 6-Clubbing chute, 7-Vibrating magnetic screen, 8-Titanium ash silo, 9-Screw discharger, 91-Titanium ash inlet, 92-Overflow outlet, 10-Conveying pipe, 11-Lifting screw, 12-Recycled material pipe, 13-Inspection port. Detailed Implementation

[0013] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0014] See Figure 1A titanium dioxide production rotary kiln titanium ash recycling device includes a rotary kiln tail 1, characterized in that: a protective cover 2 is provided at the end of the rotary kiln tail 1; a front section of a screw feeder 3 penetrates the protective cover 2 and is located inside the rotary kiln tail 1; a feed hopper 5 is provided above the rear section of the screw feeder 3; an inlet 31 is opened on the upper surface of the rear section of the screw feeder 3, and the inlet 31 is correspondingly connected to the feed hopper 5; a chute 6 is correspondingly connected to the bottom outlet of the protective cover 2; a vibrating magnetic screen 7 is provided at the end of the inside of the chute 6; a titanium ash silo 8 is correspondingly connected to the bottom of the chute 6; a horizontal screw discharger 9 is provided below the titanium ash silo 8; a titanium ash inlet 91 and an overflow outlet 92 are arranged side by side on the top of the screw discharger 9; the bottom outlet of the titanium ash silo 8 is connected to the titanium ash inlet 91; the overflow outlet 92 is connected to the inlet of the lower part of the lifting screw 11 through a conveying pipe 10; the upper outlet of the lifting screw 11 is connected to a recycling pipe 12; and the end of the recycling pipe 12 is correspondingly connected to the feed hopper 5.

[0015] The feed hopper 5 is equipped with a feeder 4 at the bottom of its interior to facilitate smooth material feeding.

[0016] The bottom surface of the spiral discharger 9 has an inspection port 13, which is covered with a cap to facilitate inspection or maintenance.

[0017] The vibrating magnetic screen 7 is connected and fixed to the chute 6 at both ends by flanges, which makes it easy to remove the vibrating magnetic screen 7 to clean the material or impurities on the screen.

Claims

1. A device for recycling titanium ash from a rotary kiln in titanium dioxide production, comprising a rotary kiln tail (1), characterized in that: The rotary kiln tail (1) is provided with a protective cover (2). The front section of the screw feeder (3) passes through the protective cover (2) and is located inside the rotary kiln tail (1). A feed hopper (5) is provided above the rear section of the screw feeder (3). An inlet (31) is opened on the upper surface of the rear section of the screw feeder (3), and the inlet (31) is correspondingly connected to the feed hopper (5). The bottom outlet of the protective cover (2) is correspondingly connected to the chute (6). A vibrating magnetic screen (7) is provided at the end of the inside of the chute (6). The bottom of the chute (6) is correspondingly connected to the chute (6). A titanium ash silo (8) is provided with a horizontal spiral discharge device (9) below the titanium ash silo (8). A titanium ash inlet (91) and an overflow outlet (92) are provided side by side on the spiral discharge device (9). The bottom outlet of the titanium ash silo (8) is connected to the titanium ash inlet (91). The overflow outlet (92) is connected to the inlet of the lower part of the lifting screw (11) through the conveying pipe (10). The outlet of the upper part of the lifting screw (11) is connected to the recycling pipe (12). The end of the recycling pipe (12) is connected to the feed hopper (5).

2. The titanium dioxide production rotary kiln titanium ash recycling device as described in claim 1, characterized in that: The feed hopper (5) is equipped with a feeder (4) at the bottom of its interior to facilitate smooth material feeding.

3. The titanium dioxide production rotary kiln titanium ash recycling device as described in claim 1, characterized in that: The bottom surface of the spiral discharger (9) has an inspection port (13) and a cover is provided on the inspection port (13) to facilitate opening for inspection or maintenance.

4. The titanium dioxide production rotary kiln titanium ash recycling device as described in claim 1, characterized in that: The vibrating magnetic screen (7) is connected and fixed to the chute (6) at both ends by flanges, which makes it easy to remove the vibrating magnetic screen (7) to clean the material or impurities on the screen.

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