Flotation coal washing device capable of automatically controlling reagent supplement

Abstract

The utility model discloses an automatic control reagent supplement flotation coal washing device which comprises a premixing module, the premixing module is communicated with a flotation tank, a plurality of flotation bins are distributed in the flotation tank in the flowing direction of ore pulp, each flotation bin is provided with an air inflation module and a floating foam discharging port, and a scraper assembly is arranged at the floating foam discharging port. The inflation module is provided with a medicine supplementing opening, the medicine supplementing opening is connected with a water supply branch pipe, and the water supply branch pipe is provided with a foaming agent adding valve opening and a collecting agent supplementing valve opening. A concentration monitoring assembly is arranged at an ore pulp inlet of each flotation bin, the concentration monitoring assemblies are electrically connected to a main control module, and the control signal output end of the main control module is electrically connected to the corresponding foaming agent adding valve port and the corresponding collecting agent supplementing valve port. According to the utility model, the reagent supplement can be automatically controlled according to the actual situation, the fine adjustment of the reagent amount in the flotation coal washing process is realized, and the optimal flotation effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal washing equipment technical field, especially an automatic control medicine supplementing flotation coal washing device. BACKGROUND

[0002] Flotation coal washing is a common coal washing process, the existing flotation machine adopts continuous multiple flotation bins to improve the extraction rate of clean coal, and each flotation bin carries out scraping of clean coal froth, part of the reagent is scraped out with the froth, which inevitably causes the loss of reagent amount, and in actual production, the amount of reagent is obtained through test verification, and the loss of reagent will certainly cause the flotation effect to be inconsistent with the expectation, which may cause the recovery rate of minerals to be reduced. SUMMARY

[0003] The utility model discloses a kind of automatic control medicine supplementing flotation coal washing devices, can automatically control medicine according to actual situation, realize the dosage fine adjustment of flotation coal washing process, guarantee the effect of best flotation.

[0004] Technical scheme: to achieve the above object, an automatic control medicine supplementing flotation coal washing device of the utility model, including premix module and flotation cell, the premix module is provided with ore pulp inlet and collector reagent dosing port, the premix module is communicated with the flotation cell, the flotation cell is distributed along ore pulp flow direction and is provided with a plurality of flotation bins, a plurality of the flotation bins are sequentially communicated, each flotation bin is provided with aeration module and froth discharge port, and a scraper assembly is arranged at the froth discharge port.

[0005] The aeration module is provided with a medicine supplementing port, the medicine supplementing port is connected with water supply branch pipe, and a frother dosing valve port and a collector reagent supplementing valve port are arranged on the water supply branch pipe.

[0006] The ore pulp inlet of each flotation bin is provided with a concentration monitoring assembly, and the concentration monitoring assembly is electrically connected to a main control module.

[0007] Further, the concentration monitoring assembly includes an ore pulp concentration detection unit and a collector reagent concentration detection unit, and the ore pulp concentration detection unit and the collector reagent concentration detection unit are connected to the collector reagent supplementing valve port through the main control module control signal transmission.

[0008] Further, the concentration monitoring assembly further includes a frother concentration detection unit, and the frother concentration detection unit is connected to the frother dosing valve port through the main control module control signal transmission.

[0009] Further, each of the froth discharge outlets is provided with a visual module, which is connected to the corresponding frother feeding valve and collector reagent feeding valve through signal transmission of the main control module.

[0010] Further, the visual module is connected to the driving device of the scraper assembly through signal transmission of the main control module.

[0011] Further, the flotation bin is provided with a blowing module on the side bin wall away from the froth discharge outlet, and the air outlet of the blowing module is arranged opposite to the froth discharge outlet in parallel to the slurry liquid surface.

[0012] Beneficial effects: the automatic control reagent flotation coal washing device can improve the extraction rate of clean coal through continuous flotation of multiple flotation bins, automatically control reagent feeding through concentration monitoring of each flotation bin, make up for the lack of reagent caused by froth hanging in the front bin and the decrease of the overall concentration of the slurry, ensure that each flotation bin achieves maximum flotation effect, and improve the flotation efficiency and quality; the visual auxiliary control reagent can adjust the reagent supplement amount under special circumstances, and meet the demand of reagent content adjustment according to actual conditions. The automatic control reagent according to actual conditions can meet the reagent fine adjustment of the flotation coal washing process, so as to ensure the best flotation effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model will be described further in connection with the drawings.

[0015] As shown in the accompanying Figure 1 The automatic control reagent flotation coal washing device comprises a premixing module 1 and a flotation tank 2, the premixing module 1 is provided with a slurry inlet and a collector reagent feeding port, the premixing module 1 is communicated with the flotation tank 2, the flotation tank 2 is provided with a plurality of flotation bins 21 along the slurry flow direction, and the plurality of flotation bins 21 are sequentially communicated, each flotation bin 21 is provided with an aeration module 3 and a froth discharge outlet 22, and the froth discharge outlet 22 is provided with a scraper assembly 4; wherein the premixing module is used for premixing the slurry and the collector reagent for a certain time, so that the collector reagent is fully mixed and dissolved, and in the case that the composition of the slurry is inconvenient, the concentration of the slurry entering the premixing module 1 is maintained within a certain range, so that the preset reagent feeding amount added into the premixing module is stable and unchanged. The slurry mixed with the collector reagent sequentially experiences flotation of multiple flotation bins, and finally the ore and the slurry are completely separated to the maximum, and the scraper assembly is used for scraping the clean coal froth on the surface of the slurry to the coal chute for subsequent treatment.

[0016] The air charging module 3 is provided with a medicine inlet 31 connected to a water supply branch pipe, which is provided with a frother dosing valve port 5 and a collector medicine supplement valve port 6; wherein the air charging module 3 adopts the existing common negative pressure air charging structure, generates negative pressure through impeller rotation, thereby absorbing air into the impeller cavity, at the same time, the water supply branch is also connected to the impeller cavity, and a stable flow of water with medicine is also extracted through negative pressure, so that the air and the medicine liquid are mixed in the impeller cavity, and the mixed bubble liquid is thrown out through the porous distributor arranged at the tank bottom, and is mixed with the ore pulp. Of course, the ore pulp of the previous flotation bin can be directly transported into the impeller cavity and mixed with air and medicine liquid at the same time, and then sprayed out into the flotation bin to ensure better mixing. The water supply branch pipe is in communication with the water circulation pipeline for providing a small flow of water as a mixing medium for air and frother, forming a mixed liquid with many uniform and stable bubbles before adding the ore pulp, to ensure the quality of the bubbles.

[0017] A concentration monitoring assembly is arranged at the ore pulp inlet of each flotation bin 21, which is electrically connected to the main control module 10, and the control signal output end of the main control module 10 is electrically connected to the corresponding frother dosing valve port 5 and the corresponding collector medicine supplement valve port 6. The concentration content is detected at the ore pulp inlet to determine the actual concentration change, and the frother dosing valve port 5 and the collector medicine supplement valve port 6 are opened adaptively according to the concentration change to add appropriate amount of collector and appropriate amount of frother into the current flotation bin, so as to make up the lack of medicine caused by scraping the froth, and the insufficient amount of medicine caused by the decrease of ore content in the ore pulp, thereby ensuring the flotation effect of the current flotation bin.

[0018] The concentration monitoring assembly includes an ore pulp concentration detection unit 7 and a collector concentration detection unit 8, which are connected to the collector medicine supplement valve port 6 through the control signal transmission of the main control module 10. The concentration monitoring assembly also includes a frother concentration detection unit 9, which is connected to the frother dosing valve port 5 through the control signal transmission of the main control module 10.

[0019] According to the above control logic connection relationship, in the initial state, the matched and optimal pulp concentration and reagent addition amount are tested according to the composition test of the flotation target raw coal as the preset value, the pulp and collector are added into the premixing module 1 at the preset value, and the frother is added into each flotation bin at the preset value. In theory, with the steady flow of the pulp through the flotation tank, the addition of the frother and the collector at the preset value can obtain the best flotation effect. In fact, with the scraping of the clean coal froth, part of the reagent amount in the pulp will be taken to the coal chute, causing the actual reagent amount in the pulp entering the next flotation bin to be relatively less than the preset amount. At this time, the pulp at the inlet of the next flotation bin is detected for the overall slurry concentration, the collector concentration and the frother concentration, so as to determine the difference between the actual reagent amount and the theoretical preset value in the flotation bin, and to control the addition amount of the collector and the frother at the reagent supplement port of the flotation bin.

[0020] Among them, the pulp concentration detection unit 7 detects the concentration of the partially floated pulp, and the collector concentration detection unit 8 detects the concentration of the collector. The pulp concentration drop value and the collector concentration drop value are calculated. In theory, when the pulp concentration is relatively low, the required collector content increases, but the increase is small. Therefore, the main control module calculates the corresponding collector supplement amount according to the pulp concentration drop value and the collector concentration drop value, respectively, to obtain the total supplement amount. According to the total supplement amount, the collector reagent valve 6 is controlled to be opened to ensure sufficient collector content.

[0021] The frother concentration detection unit 9 detects the amount of the frother. The main control module calculates the difference between the frother amount and the preset value of the frother, and controls the opening of the frother reagent valve 5 according to the difference.

[0022] Each of the froth discharge ports 22 is provided with a visual module, which is connected to the corresponding frother reagent valve 5 and the corresponding collector reagent valve 6 through the main control module 10 control signal transmission. Through the above sensor monitoring control of reagent supplement, the reagent amount in each flotation bin can be maintained within the preset value or interval range obtained by test, so that the flotation effect is maintained in the best state. However, since the flotation process is complex, there may be a period of deviation between the flotation effect and the test preset value during the process, which may be caused by various uncertain factors. The visual module can directly obtain the state of the froth, so as to judge the excessive deviation of the reagent amount of the collector and the frother through image processing and feature capture. For example, when it is found that the foam becomes small and the froth layer becomes thick, the amount of the frother is immediately reduced; when the foam becomes small and the froth layer is dense, the amount of the collector is appropriately added; when the foam becomes large and is easy to break and not easy to scrape out, the amount of the frother is appropriately increased; and when the state of the froth layer returns to normal, the sensor control of reagent supplement is switched back. In order to ensure that the reagent control is more in line with the actual situation.

[0023] The visual module is connected to the driving device of the scraper assembly 4 through the main control module 10 control signal transmission. When there is enough froth in the range of the scraper assembly, the scraper assembly is driven to work. To avoid the scraper taking too much medicament, thereby reducing the amount of replenishment and reducing the cost of medicament input.

[0024] The flotation bin 21 is provided with a blowing module on the side wall surface away from the froth discharge port 22. The air outlet of the blowing module is parallel to the liquid surface of the ore pulp and faces the froth discharge port 22. The froth layer is evenly distributed on the surface of the ore pulp. Through the blowing action of the blowing module, the froth away from the froth discharge port 22 is blown to the action interval of the scraper assembly, thereby improving the efficiency of flotation and reducing the opportunity of the scraper scraping the single ore pulp liquid surface, further reducing the content loss of the medicament caused by scraping the froth.

[0025] The overall control logic connection relationship is shown in the accompanying Figure 1 The control logic and specific structure distribution of a single flotation bin are drawn in the figure, and the rest of the flotation bin is omitted.

[0026] The above is only the preferred embodiment of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. An automatic control of medicine floating coal washing device, characterized in that: It includes premixing module (1) and flotation tank (2), the premixing module (1) is provided with ore pulp inlet and collector dosing port, the premixing module (1) is communicated with the flotation tank (2), the flotation tank (2) is provided with several flotation bins (21) along the ore pulp flow direction, multiple flotation bins (21) are communicated in sequence, each flotation bin (21) is provided with aeration module (3) and floating scum discharge port (22), the floating scum discharge port (22) is provided with a scraper assembly (4); The aeration module (3) is provided with a medicine supplement port (31), the medicine supplement port (31) is connected with a water supply branch pipe, the water supply branch pipe is provided with a frother dosing valve port (5) and a collector medicine supplement valve port (6); The ore pulp inlet of each flotation bin (21) is provided with a concentration monitoring assembly, the concentration monitoring assembly is electrically connected to a main control module (10), and the control signal output end of the main control module (10) is electrically connected to the corresponding frother dosing valve port (5) and the corresponding collector medicine supplement valve port (6).

2. The coal washing device according to claim 1, wherein: The concentration monitoring assembly includes an ore pulp concentration detection unit (7) and a collector concentration detection unit (8), and the ore pulp concentration detection unit (7) and the collector concentration detection unit (8) are connected to the collector medicine supplement valve port (6) through control signal transmission of the main control module (10).

3. The coal washing device according to claim 2, wherein: The concentration monitoring assembly further includes a frother concentration detection unit (9), and the frother concentration detection unit (9) is connected to the frother dosing valve port (5) through control signal transmission of the main control module (10).

4. The coal washing device according to claim 3, wherein: Each floating scum discharge port (22) is provided with a visual module, and the visual module is connected to the corresponding frother dosing valve port (5) and the corresponding collector medicine supplement valve port (6) through control signal transmission of the main control module (10).

5. The coal washing device according to claim 4, wherein: The visual module is connected to the driving device of the corresponding scraper assembly (4) through control signal transmission of the main control module (10).

6. The coal washing device according to claim 5, wherein: The side wall surface of the flotation bin (21) away from the floating scum discharge port (22) is provided with a blowing module, and the air outlet of the blowing module is arranged opposite to the floating scum discharge port (22) parallel to the ore pulp liquid surface.

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