RU143205U1 - GATEWAY VIBRATION - Google Patents

Abstract

1. Gateway-vibrating screen, consisting of a taper narrowing in the direction of flow of the chute with side walls and a bottom, a drive with a crank mechanism, a frame, characterized in that the bottom is made of stencils in the form of angular-shaped cross-sections transverse to the flow direction, located with a gap from each other other, the value of which is determined by the required screening fraction, which simultaneously form an enrichment device and a screening surface (sieve) for screening the material. 2. The vibrating sluice according to claim 1, characterized in that the trough is installed with the possibility of shaking during each cycle of reciprocating movements due to its impact on the shock-absorbing buffer on the frame to maintain the bed in the stencil area in a constantly loosened state. The gateway vibrating screen according to claim 1, characterized in that the draft of the crank mechanism is equipped with a damping device that dampens the impact on the drive when the gutter is shaken. The gateway vibrating screen according to claim 1, characterized in that a wire mesh with a mesh in the lumen of 4-10 mm is stretched and fixed from below to the bottom of the sieve.

Description

The utility model relates to mineral processing equipment and can be used in the mining industry for washing and classifying gold-bearing sands, ores, and other alluvial deposits.

Fixed grate screens are known, which are the simplest in design, but they give low screening accuracy. (V. A. Olevsky “designs and calculations of screens”, M., State Scientific and Technical Publishing House of Literature on Ferrous and Non-Ferrous Metallurgy, 1955, p. 14-15).

Known screens with moving grates, but they are used for large screening.

Known drum type screens, which are a cylinder or a truncated cone with a perforated surface and rotated along its longitudinal axis. Drum screens are mainly used for medium screening and the lower limit of screening accuracy is almost 10 mm. In addition, drum-type screens are voluminous in design and metal consumption.

A known hydraulic screen (patent RU 2132753 C1, B07B 1/00, B07B 1/28, 1999), which performs hydro-screening in a duct with receiving and unloading sieves mounted on elastic elements and immersed in a hopper with water. The hydraulic screen consists of a box, a slurry receiver, an unloading chute, a drive equipped with a differential two-crank mechanism. Screens with a differential two-crank drive mechanism are known, but due to some drawbacks they are not widely used (V. A. Olevsky “Design and calculations of screens”, M., State Scientific and Technical Publishing House of Literature on Mining and Non-Ferrous Metallurgy, 1955, p. 28 ), and screening with the release of oversize material up the discharge sieve reduces the performance of the screen.

A known installation for the extraction of plate gold (patent RU 2160163 C1 B03B 5/70, 2000), containing a rectilinear inclined groove provided with plate stencils, and the stencils are installed with the formation of slit-like gaps between themselves and oriented perpendicular to the direction of flow of the pulp. However, the disadvantage of this technical solution is the clogging of the slit-like gaps with a plate-like pebble material, which reduces the efficiency of enrichment of useful material.

The closest in the totality of technical features is the method of gravitational ore dressing and a device for its implementation (patent RU 2200631 C2 B03B 5/72, 2003). The method includes introducing pulp into the separation zone, translational movement in the separation zone under the influence of vibrational vibrations directed at an angle of 10-30 degrees from the horizontal surface parallel to the gutter and against the course, output of extracted products is carried out using a device for gravity ore dressing containing a sled, a platform made with the possibility of changing the angle of inclination by 10-30 degrees from the horizontal surface, a vibration drive mounted on the platform, a frame mounted on a hinge x supports parallel platform trough with thresholds, expanding towards the discharge end and mounted on the frame. However, this solution does not provide an effective classification of the material during wet screening of the pulp at a solid to liquid ratio of 1: 7 used in the enrichment of gold-containing sands, the specified angle of inclination will give a drift of useful material, and the hole in the middle of the threshold does not solve the problem of efficient discharge of gold-containing concentrate.

The aim of the invention is the capture of a heavy gold-containing fraction in the pulp, including fine and fine particles, ensuring the effectiveness of its wet screening with the release of the under-sieve product, suitable for further fine enrichment.

This goal is achieved in that the device is made in the form of a gateway-vibrating screen, containing a trough narrowing in the direction of flow with side walls and a bottom in the form of a sieve made of stencils in the form of cross-sectional corrugations of angular profile located with a gap from each other, the value of which determined by the required screening fraction, for example 4 mm. Thus, the stencils simultaneously form both an enrichment device and a screening surface for screening the material. The gutter is exposed to vibration, which increases the efficiency of wet screening and trapping of heavy fractions in the pulp. The narrowing of the trench in the direction of flow is determined by the condition for the concentration of the heavy fraction in the lower part of the stream under the influence of constrained deposition mechanisms and the filtration (leaving) of a part of the liquid medium through a sieving surface (sieve). The under-sieve material is collected in a receiving hopper for subsequent fine enrichment.

The essence of the technical solution is illustrated by drawings, where:

- figure 1 shows a diagram of the gateway vibrating screen (side view);

- figure 2 is a drive diagram and a view of the gutter (top view);

- figure 3 is a view of the damper mechanism;

- figure 4 is a view of a sieve in section.

The lock screen contains a taper 1 tapering in the direction of flow with side walls 2 and a bottom in the form of a sieve 3. The sieve is made of stencils in the form of a cross-sectional profile transverse to the flow direction of the grooves, with a gap from each other, the value of which is determined by the required screening fraction, for example, 4 mm. If there is more than 10 mm of thin lamellar pebble material in the enriched heavy fraction, wire mesh 22 with a mesh in the lumen of 4-10 mm is stretched from below and to the bottom of the sieve. The gutter rests on the frame 6 with the head (loading) part through the rollers 5, and the tail (unloading) part through the pendulum (articulated) rack 7, height-adjustable by the mechanism 8. A crank drive 9 is connected to the head (loading) part of the gateway, providing the gutter is reciprocating, while the tail (unloading) part has vertical displacement. To give the chute a shaking effect during each cycle, in the upper position, a stop 10 is mounted on the chute, which contacts the shock-absorbing buffer 11 on the frame 6. The under-mesh material is collected in a receiving hopper 12 for further fine enrichment

Figure 2 shows a top view of the drive, where the drive consists of an engine 13, a gearbox 14, cranks 15, mounted on both ends of the low-speed shaft of the gearbox. To the crank 15 and the rocker arm 16, the rod 17 is hingedly connected. The rocker arm is pivotally connected to the groove 1 through the fork 18.

Figure 3 structurally shows a thrust device 17, including a damping mechanism consisting of a sleeve 18, a piston 19, a compression spring 20. The purpose of the damping mechanism is to dampen shock effects on the drive when the gutter collides with a shock-absorbing buffer.

Figure 4 shows a cross-sectional view of a sieve, including side walls 2 of the trough, transverse corrugations 4 of an angular shape at an angle of 20 degrees to the bottom. From below to the bottom of the sieve, a wire mesh 22 with a mesh in the lumen of 4-10 mm is stretched and fixed.

Gateway vibrating screen works as follows: set the working angle of the trench 1 depending on the properties of the enriched material and flow rate. The drive 9 is turned on and the gutter 1 starts to reciprocate and is shaken during each cycle in the highest position. Sands in the stream, passing through the stencils, settle between the corrugations 4, and under the influence of accelerated reciprocating and shaking movements, the bed is in a constantly loosened state, which contributes to the movement of heavy particles from the upper layer to the bottom layer and further screening with the release of the under-sieve fraction. The under-sieve material is collected in a receiving hopper 12 for further fine dressing.

Claims (4)

1. Gateway-vibrating screen, consisting of a taper narrowing in the direction of flow of the chute with side walls and a bottom, a drive with a crank mechanism, a frame, characterized in that the bottom is made of stencils in the form of angular-shaped cross-sections transverse to the flow direction, located with a gap from each other friend, the value of which is determined by the required screening fraction, forming both an enrichment device and a screening surface (sieve) for screening the material. 2. The gateway-vibrating screen according to claim 1, characterized in that the gutter is installed with the possibility of shaking during each cycle of reciprocating movements due to its impact on the shock-absorbing buffer on the frame to maintain the bed in the stencil area in a constantly loosened state. 3. The gateway vibrating screen according to claim 1, characterized in that the draft of the crank mechanism is equipped with a damping device that dampens the impact on the drive at the time of shaking the gutter. 4. The gateway vibrating screen according to claim 1, characterized in that a wire mesh with a mesh in the lumen of 4-10 mm is stretched and fixedly fixed from below to the bottom of the sieve.