Device and method for metering, adjusting and adding reagent for coal flotation machine

Abstract

The invention discloses a device and a method for metering, adjusting and adding a reagent for a coal flotation machine, and belongs to the technical field of coal flotation machine devices and methods. The device and the method are used for optimally adjusting and controlling the reagent adding amount of the coal flotation machine. A liquid level sensor is fixed at the upper end of a reagent container, the bottom of the reagent container is provided with a reagent pipeline connected with a clear water pipeline, the clear water pipeline is connected with an emulsifying pump through a clear water pipeline pump, the output end of the emulsifying pump is connected with an emulsifying reagent pipeline, the emulsifying reagent pipeline is connected with a reagent adding tube, the front end of the reagent adding tube is faces the reagent adding point of the flotation machine, a reagent adjusting valve is installed in the reagent pipeline, and a flow meter and the reagent adding adjusting valve are installed in the reagent adding tube. The total reagent adding amount of the flotation system and the reagent flow of each reagent adding point can be accurately metered and adjusted in real time, the reagent flow is controlled within a reasonable interval required by the flotation production process, efficient and highly-selective flotation and scrape-out of clean coal are ensured, and thefine ore yield and the qualified rate of the product are increased.

Description

technical field [0001] The invention relates to a device and method for metering, adjusting and adding agents of a coal flotation machine, and belongs to the technical field of coal flotation machine equipment and methods. Background technique [0002] Flotation is a method of separating useful minerals from useless minerals under the action of chemicals and according to the differences in the surface properties of minerals. The flotation concentrate is attached to the foam layer on the surface of the pulp in the flotation machine, and the foam layer and the pulp are separated by overflow or the concentrate foam scraper. Therefore, the precise metering and dosage of the flotation agent during the flotation production process are controlled at Reasonable dosage range is very important. [0003] The foaming agent in the flotation agent is a surface active substance, which mainly reduces the interfacial tension on the air-water interface, promotes the formation of small air bu...

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Problems solved by technology

Since the working frequency of the metering pump is adjusted by the frequency converter and the dosing amount is not strictly linear, and the metering error is large due to the small amount of dosing in each chamber, and the dosing of the metering pump belongs to open-loop control, there is no control in the metering pump The flotation agent flow measurement is carried out before the outlet and the dosing point. When the metering pump is worn or the diaphragm of the diaphragm metering pump is damaged, the agent cannot be added and real-time monitoring cannot be performed. Only when the on-site workers find that the flotation effect is poor will they be aware of it Inaccurate drug dosage or inability to add the drug, which seriously affects product yield and product quality

However, when the needle valve is installed at the dosing point for manual dosing adjustment, there is no flow detection process. It can only be observed by the operator with the naked eye. It is not convenient to adjust in real time when the flotation feed changes, which seriously affects the flotation machine. Flotation effect

[0007] Since the current coal mechanical agitation flotation machine agent metering, adjustment and addition methods cannot meet the needs of rapid development of production and affect the normal production, it is very necessary to carry out the device and method of flotation machine agent metering, adjustment and addition Make improvements to achieve fast and accurate results

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