The shaker belongs to the flow film dressing equipment, which was developed from the early fixed and movable chutes. It was also classified as a chute in the 1940s. In the 1950s, due to the wide application of the shaker, Its asymmetrical reciprocating motion is characterized by its own system.
In 1890 the United States made Shaker coal for the election, resulting in asymmetric reciprocating motion of the bed using combat methods; the late 19th century developed by Will Foley a mineral used to promote the movement of the bed shaker with eccentric linkage It is still in use today, but the type of shaker has been diversified.
The shaker is divided into a mineral sand shaker (treatment of 0. 074~2mm grain grade ore) and a mud shaker (treatment - 0.074mm grain grade slime), a dressing and a rocker for coal preparation. Depending on the configuration of the shaker bed structure, and a support bed type mode, etc., can be divided into 6-S shaker, tin cloud shaker, CC-2 shaker, spring shaker, centrifuge and the like shaker Shaker for mineral processing.
In the 1950s, the United States began to study a suspended multi-layer shaker. In 1957, the United States developed a new type of transmission mechanism, the suspended multi-eccentric inertial head. In 1961, a double and three-layer coal shaker was produced. A modified shaker for beneficiation was developed to achieve a major innovation in the history of shaker development. In China, a multi-layer shaker was also manufactured in the 1950s. However, since the center of gravity of the bed surface does not coincide with the drive axis, it often causes vibration, so it has not been promoted. In 1975, China began to develop a suspension shaker. In 1977, the North Mine Institute developed 8YC (4 layers) and 9YC (3 layers) suspended fiberglass shakers. Subsequently, Tangshan Branch developed XLY-type suspended diamonds with three layers and four. The layered glass steel shaker, Yunxi Design and Research Institute (hereinafter referred to as Yunxi Design Institute, former Yunxi Research Institute) changed the original six-layer mud shaker to the suspended six-layer mud shaker.
A typical shaker structure is shown in Figure 1. All of the shakers consist essentially of three major parts: the bed top, the frame and the transmission. The bed surface of the plane shaker is approximately rectangular or diamond-shaped, and a transmission device is arranged at the longitudinal end of the bed surface, and the lateral direction of the bed surface is relatively inclined, and the feeding tank and the water supply tank are arranged above the inclined surface. There is a bed strip along the longitudinal direction on the bed surface (commonly known as the double strip). The height of the bed is gradually lowered from the transmission end to the opposite side and is extinguished along one or two oblique lines. The entire bed surface is supported or hoisted by a frame, and the frame is equipped with a slope adjusting device.
The slurry or dry material is fed into the ore tank, and water is added to form a slurry with a concentration of about 25% to 30%, which flows to the bed surface. The ore group is loosened and layered by the water flow flushing and the bed surface vibration in the bed groove. The layered upper and lower layers of the ore are moved in different directions under the different flow pressures of the water and the friction of the bed surface. The upper layer of light mineral particles is more inclined to move downward and downward along the lateral direction of the bed surface under the large hydraulic force, so this side is called the tailings side. The heavy mineral particles at the bottom of the bed move directly to the opposite side of the drive end and are discharged under the differential push of the bed surface, which is referred to herein as the concentrate end. In this way, the ore particles move in different directions according to their density and particle size, and are fanned out along the diagonal from the feeding tank (Fig. 2), which are sequentially discharged along the edge of the bed surface. The discharge line is long and can Accurately produce a variety of different quality products, such as concentrates, secondary concentrates, medium mines and tailings.
The operational factors that have an impact on the performance of the shaker include: stroke, stroke, ore concentration, grain size composition, ore supply, flushing water, lateral slope of the bed surface, etc., and appropriate values ​​should be selected in actual ore dressing production.
   figure 1  figure 2
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