A wide particle size pulsating shallow groove dense medium separator

Abstract

The invention discloses a wide-grain-level pulsating shallow tank heavy medium separator, which comprises a sorting tank, a pulsating valve, a coal medium mixing box, a clean coal discharge device and a scraper stone discharge device, and the sorting tank is fixed On the basis of the equipment, one side of the sorting tank is provided with a stone discharge port, and the bottom is connected with a rising medium pipe. The pulsating valve is installed on the rising medium pipe, and the control coil of the pulsating valve is connected to the pulse signal. The coal medium mixing box and The clean coal discharge device is respectively installed at the feed end and the discharge end of the sorting tank, and the scraper stone discharge device is installed at the bottom of the sorting tank and corresponds to the stone discharge port. The invention controls the repeated opening and closing of the pulsating valve so that the ascending medium forms a pulsating upflow. This pulsating upflow can prevent the density change caused by the medium sedimentation when the medium flow velocity is small, and ensure the uniform density of the longitudinal medium in the sorting tank. , avoiding the floating of high-density small particles, thus effectively improving the separation effect of raw coal.

Description

technical field [0001] The invention relates to a shallow tank heavy medium separation device for coal preparation, in particular to a wide particle size pulsation energy-saving shallow tank heavy medium separation machine, which belongs to the field of separation technology. Background technique [0002] The shallow groove heavy medium separator is lump coal separation equipment with high separation efficiency and strong adaptability. It is the preferred equipment for lump coal discharge in large-scale thermal coal preparation plants, and has broad market application prospects. [0003] When the existing shallow tank dense medium separator is in operation, the medium flow in the sorting tank includes a stable upward flow and a horizontal flow, the upward medium flow accounts for 20% of the total suspension, and the horizontal medium flow accounts for 20% of the total suspension. 80%. The rising medium flow has a great influence on the sinking of small-sized and high-densi...

AI Technical Summary

Problems solved by technology

The rising medium flow has a great influence on the sinking of small-sized and high-density particles. When the rising medium flow velocity is greater than the sinking speed of small-sized and high-density particles, small-sized and high-density particles must be mixed into the floating objects, seriously affecting the quality of floating objects. When the flow rate of the rising medium is too small, the medium in the sorting tank is easy to settle, resulting in the longitudinal instability of the medium density in the sorting tank, which affects the sorting effect

[0004] Due to the above reasons, the shallow groove dense medium separator has a narrower separation size and a higher lower limit, and is mainly used for the separation of 13-150mm coal. When separating -13mm coal, the content of high-density small particles in the overflow is relatively high. Many, affecting the quality of clean coal

At the same time, the upper limit of the shallow tank heavy medium separator is lower, and it is mainly used for the separation of -150mm coal. When the upper limit is greater than 150mm, large particles in the overflow are easy to accumulate at the overflow port, and the horizontal medium flow must be increased. , and increasing the horizontal flow will not only shorten the separation time of the raw coal in the tank and affect the separation effect, but also increase the power of the circulating medium pump, thereby increasing the processing cost; if the horizontal flow is too small, the raw coal will not be effectively wetted and will Affect sorting effect and processing capacity

[0005] To sum up, due to the unreasonable structure, the application of the existing shallow tank dense medium separator is limited to a certain extent. At present, there is an urgent need for a wide particle size high-efficiency energy-saving shallow tank dense medium separator.

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