Qualified medium barrel dilute medium water complementing system and method used for dense-medium coal preparation

Abstract

The invention discloses a qualified medium barrel dilute medium water complementing system used for dense-medium coal preparation. The system comprises a dilute medium flow guide device, a dilute medium barrel, a dilute medium pump, a detection module and a control module. The dilute medium flow guide device is connected with a qualified medium barrel and leads dilute media into the qualified medium barrel; the dilute medium barrel is connected with a medium drainage screen and holds the dilute media removed from the medium drainage screen; one end of the dilute medium pump is connected with the dilute medium barrel, and the other end of the dilute medium pump is connected with a dilute medium magnetic separator; the detection module is installed on the qualified medium barrel and is used for detecting the density and the liquid level of dense-medium suspension liquid in the qualified medium barrel and sending density and liquid level parameters to the control module; the control module is installed on the dilute medium flow guide device and is used for controlling the dilute medium flow guide device to start and / or stop introducing the dilute media into the qualified medium barrel according to the density and liquid level parameters of the dense-medium suspension liquid in the qualified medium barrel. The invention further discloses a qualified medium barrel dilute medium water complementing method. By means of the qualified medium barrel dilute medium water complementing system and method, stability of the liquid level and the density of the dense-medium suspension liquid in the qualified medium barrel is guaranteed in dense-medium coal preparation.

Description

technical field [0001] The invention relates to the technical field of coal preparation, in particular to a system and method for replenishing water in a combined-medium barrel and thin-medium medium for dense-medium coal preparation. Background technique [0002] Coal preparation refers to the process of sorting out products that meet the quality requirements from raw coal. Common coal preparation processes include jigging, heavy-medium separation, flotation, and dry separation. Its advantages in many aspects have attracted much attention, and it has been widely used in the field of coal washing and processing in recent years. Since dense medium coal preparation is suitable for the separation of various optional raw coals, especially in the separation of difficult and extremely difficult coals, more attention has been paid to it. Therefore, in recent years, dense medium coal preparation has surpassed jigging separation and has become the main sorting method. The so-called...

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Problems solved by technology

In addition, the separation density of the dense medium suspension is the key to product quality control. If the separation density is too low, it is difficult to ensure the recovery rate, and if the separation density is too high, it will increase the ash content of the product coal. When it is high, water needs to be replenished to achieve a qualified sorting density

At present, most dense medium coal preparation processes use clean water to replenish water in the medium tank. However, if a large amount of clean water enters the medium tank, it may damage the stability of the dense medium suspension in the medium tank, which is unfavorable for production and product quality control. influences

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