Nickel concentrate drying and conveying device capable of inhibiting bonding of rotary screen

Abstract

The utility model discloses a nickel concentrate drying and conveying device capable of inhibiting bonding of a rotary screen, which comprises a steam dryer, the rotary screen is arranged below a discharge box of the steam dryer, an embedded scraper transporter is arranged below the rotary screen, the rotary screen is connected with the embedded scraper transporter through a cloth bag, a breathable cloth bag is further arranged above the embedded scraper transporter, and the breathable cloth bag is connected with the rotary screen. The embedded scraper transporter is connected with a pneumatic lifting tank through a discharging pipe, a nickel concentrate fluidization plate is arranged at the bottom of the pneumatic lifting tank, and a plurality of through holes are evenly distributed in the nickel concentrate fluidization plate. By means of the nickel concentrate conveying device, drying and conveying of nickel concentrate are effectively achieved, negative pressure adjustment of the concentrate in the conveying process of the rotary screen, the embedded scraper conveyor and the pneumatic lifting tank is achieved, conveying and conveying of the concentrate are promoted, and adhesion of the concentrate in the rotary screen is reduced and restrained.

Description

Technical Field

[0001] The utility model relates to a nickel concentrate drying and conveying device, in particular to a nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen. Background Art

[0002] The nickel concentrate in the nickel concentrate steam drying system is screened by a gyratory screen after drying. As the core equipment in the whole drying system process, the operation status of the gyratory screen severely restricts and affects the subsequent flash smelting process. If the operation status of the gyratory screen is good, the concentrate bin can be effectively guaranteed, and the demand of flash smelting can be met; if there is more adhesion on the gyratory screen, it will affect the screening of lumpy and powdery materials in the dried concentrate, and then affect the concentrate bin, thus restricting the production of the flash furnace. Content of the Utility Model

[0003] The utility model provides a nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen, realizes the regulation of the system negative pressure, promotes the flow and transmission of the concentrate in the gyratory screen, and reduces the adhesion of the concentrate in the gyratory screen.

[0004] The utility model is realized by the following technical solutions:

[0005] A nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen includes a steam dryer. A gyratory screen is arranged below the discharge box of the steam dryer. An en masse conveyor is arranged below the gyratory screen. The gyratory screen is connected with the en masse conveyor through a cloth bag. An air-permeable cloth bag is also arranged above the en masse conveyor. The en masse conveyor is connected with a pneumatic lifting tank through a feed pipe. A nickel concentrate fluidizing plate is arranged at the bottom of the pneumatic lifting tank. A plurality of through holes are evenly arranged on the nickel concentrate fluidizing plate. An air-permeable cloth is arranged on the nickel concentrate fluidizing plate. A fluidization chamber is formed between the nickel concentrate fluidizing plate and the bottom end of the pneumatic lifting tank. The pneumatic lifting tank is connected with a Roots blower through a main pipeline. A bypass pipeline is arranged on the main pipeline. The bypass pipeline is connected with the fluidization chamber. The main pipeline passes through the nickel concentrate fluidizing plate and extends into the pneumatic lifting tank. A pneumatic lifting pipe is arranged at the top end of the pneumatic lifting tank.

[0006] A fluidization air regulating valve is arranged on the bypass pipeline. An observation mirror is arranged on the pneumatic lifting tank. A breather pipe is also arranged at the top of the pneumatic lifting tank.

[0007] Two groups of bypass pipelines are arranged. Three groups of Roots blowers are arranged.

[0008] Beneficial effects of the utility model: The device of the utility model effectively realizes the dry transportation of nickel concentrate, realizes the negative pressure adjustment of the concentrate in the transmission process of the gyratory screen-buried scraper conveyor-pneumatic lifting tank, promotes the transmission and transportation of the concentrate, and reduces and inhibits the adhesion of the concentrate in the gyratory screen. The utility model is easy to operate and implement, can effectively inhibit the adhesion of the gyratory screen, is conducive to the stable operation of the steam drying system, and can reduce the workload of the post. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] In the figure: 1-steam dryer, 2-gyratory screen, 3-breathable cloth bag, 4-buried scraper conveyor, 5-air lifting tank, 6-sight glass, 7-Roots blower, 8-fluidizing air regulating valve, 9-cloth bag, 10-nickel concentrate fluidizing plate, 11-air lifting pipe, 12-breathable pipe, 13-fluidizing chamber. DETAILED DESCRIPTION

[0011] The utility model is further described below in conjunction with the accompanying drawings.

[0012] like Figure 1 As shown, a nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen comprises a steam dryer 1, a gyratory screen 2 is arranged below the discharge box of the steam dryer 1, a buried scraper conveyor 4 is arranged below the gyratory screen 2, the gyratory screen 2 is connected to the buried scraper conveyor 4 through a cloth bag 9, a breathable cloth bag 3 is also arranged above the buried scraper conveyor 4, the buried scraper conveyor 4 is connected to an air lifting tank 5 through a discharge pipe, a nickel concentrate fluidizing plate 10 is arranged at the bottom of the air lifting tank 5, a plurality of through holes are evenly arranged on the nickel concentrate fluidizing plate 10, a breathable cloth is arranged on the nickel concentrate fluidizing plate 10, a fluidizing chamber 13 is formed between the nickel concentrate fluidizing plate 10 and the bottom end of the air lifting tank 5, the air lifting tank 5 is connected to a Roots blower 7 through a main pipeline, a bypass pipeline 8 is arranged on the main pipeline, the bypass pipeline 8 is connected to the fluidizing chamber 13, the main pipeline passes through the nickel concentrate fluidizing plate 10 and extends into the air lifting tank 5, and an air lifting pipe 11 is arranged at the top of the air lifting tank 5.

[0013] The bypass pipe 8 is provided with a fluidizing air regulating valve, and the fluidizing air flow rate can be adjusted by adjusting the fluidizing air regulating valve. The pneumatic lifting tank 5 is provided with an observation mirror 6, and the peristaltic fluidization effect of the concentrate material in the pneumatic lifting tank can be monitored through the observation mirror 6. A vent pipe 12 is also provided on the top of the pneumatic lifting tank 5, which is used to empty the excess gas in the air supply of the Roots blower and the floating material in the pneumatic lifting tank body. The bypass pipe 8 is provided in two groups. The buried scraper conveyor 4 is a continuous conveying equipment that uses a moving scraper chain in a closed shell to transport bulk materials such as powder, small particles and small blocks by utilizing the internal friction and side pressure characteristics of the bulk materials.

[0014] During use, the steam dryer 1 dries and removes water from the incoming mixed wet nickel concentrate. After drying and water removal, the nickel concentrate enters the rotary screen 2 to achieve physical screening of the dried concentrate lumps and powdered materials. The screened materials enter the scraper conveyor 4 through the cloth bag 9. The scraper conveyor 4 realizes the intermediate transportation function of the dried and screened nickel concentrate. The breathable cloth bag 3 discharges the water vapor in the dried concentrate. The scraper conveyor 4 transports the dried and screened nickel concentrate through the feed pipe to the pneumatic lifting tank 5. By adjusting the fluidizing air regulating valve on the bypass pipe 8, the fluidizing air enters from the fluidizing chamber 11 to make the dried and screened nickel concentrate on the nickel concentrate fluidizing plate 10 suspended in the moving fluid, and then the air entering from the main pipe sends the nickel concentrate into the pneumatic lifting pipe 11, and is sent to the concentrate bin by the pneumatic lifting pipe 11 for flash smelting.

[0015] Under the action of wind transportation, the pneumatic lifting tank 5 has a high flow rate and a low pressure, forming a negative pressure. Thus, a negative pressure is formed in the transmission process of the rotary screen - scraper conveyor - pneumatic lifting tank, effectively preventing the adhesion situation during the screening process of the rotary screen.

[0016] According to the negative pressure conditions of the cloth bag 9 between the rotary screen and the scraper conveyor 4 and the breathable cloth bag 3 of the scraper conveyor, by adjusting the fluidizing air of the pneumatic lifting tank through the fluidizing air regulating valve, the negative pressure adjustment in the transmission process of the concentrate in the rotary screen - scraper conveyor - pneumatic lifting tank can be realized, promoting the transmission and transportation of the concentrate and reducing the adhesion situation of the rotary screen. A cloth bag 9 is arranged between the rotary screen 2 and the scraper conveyor 4, and the negative pressure condition of the whole transmission process can be reflected by the negative pressure condition of the cloth bag 9. By observing the negative pressure conditions of the cloth bag 9 and the breathable cloth bag 3 of the scraper conveyor, and at the same time monitoring the peristalsis of the concentrate in the pneumatic lifting tank 5 through the observation mirror 6, adjusting the fluidizing air regulating valve 8 to regulate the fluidizing air flow rate, the negative pressure adjustment in the transmission process of the concentrate in the rotary screen - scraper conveyor - pneumatic lifting tank is realized, promoting the transmission and transportation of the concentrate, and reducing and inhibiting the adhesion of the concentrate in the rotary screen.

Claims

1. A nickel concentrate drying and conveying device for suppressing the adhesion of a gyratory screen, characterized in that: It includes a steam dryer (1). A gyratory screen (2) is arranged below the discharge box of the steam dryer (1). A scraper conveyor (4) is arranged below the gyratory screen (2). The gyratory screen (2) is connected to the scraper conveyor (4) through a cloth bag (9). An air-permeable cloth bag (3) is also arranged above the scraper conveyor (4). The scraper conveyor (4) is connected to a pneumatic lifting tank (5) through a feeding pipe. A nickel concentrate fluidization plate (10) is arranged at the bottom of the pneumatic lifting tank (5). A number of through holes are evenly distributed on the nickel concentrate fluidization plate (10). An air-permeable cloth is arranged on the nickel concentrate fluidization plate (10). A fluidization chamber (13) is formed between the nickel concentrate fluidization plate (10) and the bottom end of the pneumatic lifting tank (5). The pneumatic lifting tank (5) is connected to a Roots blower (7) through a main pipeline. A bypass pipeline (8) is arranged on the main pipeline. The bypass pipeline (8) is connected to the fluidization chamber (13). The main pipeline passes through the nickel concentrate fluidization plate (10) and extends into the pneumatic lifting tank (5). A pneumatic lifting pipe (11) is arranged at the top end of the pneumatic lifting tank (5).

2. The nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen according to claim 1, wherein: A fluidization air regulating valve is arranged on the bypass pipeline (8).

3. The nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen according to claim 1, wherein: An observation mirror (6) is arranged on the pneumatic lifting tank (5).

4. The nickel concentrate drying and conveying device for inhibiting the adhesion of a gyratory screen according to claim 1, characterized in that: A breather pipe (12) is also arranged at the top of the pneumatic lifting tank (5).

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