RU2165298C1 - Three-phase concentrator for extraction of useful and toxic minerals - Google Patents

Abstract

FIELD: concentration of ores and placers at final stages of separation of concentrate. SUBSTANCE: concentrator has drive and separation chamber with heavy particle settling surface; separation chamber has compartment for average-density particles and compartment for low-density particles with overflow lip made concentrically relative to walls of separation chamber. Drive is connected with centrifugal action exciter by means of screw regularly engaged by means of sleeve; exciter is mounted at angle relative to horizontal plane of separation chamber and perpendicularly relative to heavy particle settling surface. Exciter is provided with bent blades with two-sided revolving impellers. Average-density particle settling surface is concentric relative to walls of separation chamber and is located at angle relative to heavy particle settling surface, under low-density particle settling surface. EFFECT: improved quality of separation of concentrate into three fractions by density per cycle. 2 dwg

Description

 The invention relates to the enrichment of placers and ores at the final stages of separation of the concentrate containing valuable mineral particles of high density and mineral particles of medium density with toxic elements; from raw materials with a predominance of an average heavy fraction of various forms and a large difference in the density of the separated fractions.

 Known installations, the principle of separation in which is based on an increase in the hydrodynamic parameters of the separated particles due to centrifugal forces [1, 2, 3, 4, 5, 6].

 These plants carry out the separation of the concentrate into two or more fractions. Most of them allow multifractional separation in more than one processing cycle. In addition, they have a number of technological shortcomings that do not allow their use in continuous cycles of work at large mines and mining plants with dredges and several industrial instruments.

 Known centrifugal separator UTsK-26-800, having a housing, a separation chamber with a deposition surface of heavy particles, a container for collecting concentrate, a drive, an additional water supply system [7].

 This separator allows continuous process control with automated loading and unloading operations. However, the separation in the cycle is carried out into two fractions.

 The closest analogue in terms of the set of essential features and the achieved result when using it is a three-phase single-plane concentrator containing a drive, a separation chamber with a heavy particle deposition surface, having a compartment for medium-density particles and a compartment for low-density particles with an overflow threshold made concentrically to the walls of the separation chamber [8].

 The disadvantage of this installation is the heavy load on the transmission mechanisms, limiting the throughput, productivity and quality of extraction of medium density minerals with toxic elements.

 The purpose of the invention is to increase the efficiency of the extraction of a valuable component at the final stages of enrichment and to reduce the technogenic impact on the environment by isolating medium-density minerals with toxic elements.

 This goal is achieved in that in a three-phase concentrator for the separation of valuable and toxic minerals containing a drive, a separation chamber with a deposition surface of heavy particles, having a compartment for medium density particles and a compartment for low density particles with an overflow threshold, made concentrically to the walls of the separation chamber, the drive by means of a screw connection periodically interfaced with a coupling, connected to a centrifugal agent, mounted at an angle to the horizontal plane of the chamber perpendicular to the deposition surface of heavy particles and equipped with radius blades with double-sided rotating impellers, while the deposition surface of medium-density particles is made concentric with the walls of the separation chamber and is set at an angle to the deposition surface of heavy particles, under the deposition surface of low-density particles, and an additional water supply system located above the deposition surface of heavy particles.

 Due to the screw connection periodically coupled by the coupling and orientation of the centrifugal agent, at an angle to the horizontal plane of the separation chamber, perpendicular to the deposition surface of heavy particles, a geometrical separation zone and physical separation process are ensured. Physicomechanical parameters of centrifugal action are created for heavy particles (for separation of medium and low density particles from the zone), and gravitational type - for the deposition of heavy particles specifically oriented to their surface. The periodic turbulent action of the centrifugal agent elements on medium and low density particles creates favorable rheological parameters of the medium (viscosity, resistance), reduces the effect of particle size, increases the effect of the difference in particle density and stabilizes the particle deposition rate.

 The drawings show a three-phase concentrator for the separation of valuable and toxic minerals.

 In FIG. 1 is a general view of a hub without a front wall; in FIG. 2 - section aa in FIG. 1; in FIG. 3 is a side view of the radial blades and double-sided rotating impellers.

 The three-phase hub contains a drive 1, a separation chamber 2 with a deposition surface of heavy particles 3 and a compartment for heavy particles 4; contains concentric to the walls 5 of the separation chamber 2, the surface of the deposition of particles of medium density 6. The surface of the deposition of particles of medium density 6 is set at an angle 7 to the deposition surface of heavy particles 3, under the surface of the deposition of particles of low density 8 and mates with the compartment for particles of medium density 9. The surface the deposition of particles of low density 8 mates with the concentric walls 5 of the separation chamber 2 overflow threshold 10 of the compartment for particles of low density 11.

 The drive 1 through periodically mating using a clutch 12 screw connection 13 is connected with the causative agent of centrifugal action 14.

 The causative agent of centrifugal action 14 is installed at an angle of 15 to the horizontal plane 16 of the separation chamber 2, perpendicular to 17 of the deposition surface of heavy particles 3 and is equipped with radius blades 18 with two-sided rotating impellers 19. Screw connection 13 consists of a screw 20 rigidly connected to the rod 21 of the hydraulic cylinder 22 and bushings 23, rigidly connected to the centrifugal exciter 14 and installed in the bearing assembly 24, with the possibility of free rotation with periodic pairing of its internal screw ited 25 with a screw 20.

 The separation chamber 2 is equipped with an additional water supply system 26 located above the deposition surface of the heavy particles 3, and openings 27, 28, 29 to remove fractions of the concentrate.

 The causative agent of centrifugal action 14 of the lower end 30 is fixed in the hole 31 of the corner 32.

 The work of a three-phase hub is as follows.

 After the clutch 12 is turned on, the inner screw surface 25 of the sleeve 23 enters into interaction with the screw 20. The hydraulic cylinder 22 of the actuator 1 is turned on. The rod 21, rigidly connected to the screw 20, starts to move it from the top to the bottom. Dressed with a sleeve 12 on the screw 20, the sleeve 23 begins to rotate freely in the bearing assembly 24 and rotate the centrifugal exciter 14.

 The concentrate is fed over the centrifugal agent 14. A medium system is created, similar to a heavy suspension, which becomes homogeneous due to the radius blades 18 and two-sided rotating impellers 19 of the centrifugal agent 14. The medium particles are distributed along the concentration radii above the deposition surface of medium-density particles 6, installed at an angle of 7 to the deposition surface of heavy particles 3 under the surface of the deposition of particles of low density 8, and - above the latter.

 The heavy particles of concentrate, oriented in the area above the deposition surface of heavy particles 3, in the conditions of constrained falling, begin to leave the shear rate zone when the screw 20 is in the lowest position, the clutch 12 is turned on and the screw connection 13 is disconnected. The screw 20 freely moves up to its extreme position . The causative agent of centrifugal action 14 stops.

 Heavy particles are oriented under the influence of gravitational forces in a calm environment, provided by the position of the causative agent of centrifugal action 14 at an angle of 15 to the horizontal plane 16 of the separation chamber 2 and perpendicular to the 17 deposition surface of heavy particles 3.

 Heavy particles fall on the deposition surface of heavy particles 3 and fall into the compartment for heavy particles 4. Particles of medium density are deposited on concentric walls 5 of separation chamber 2 and installed at an angle 7, the deposition surface of particles of medium density 6 and fall into the compartment for particles of medium density 9 Established above the deposition surface of medium-density particles 6, the deposition surface of low-density particles 8 orients the low-density particles toward the overflow threshold 10 of the low-density particle compartment 11, as overflow threshold 10 is made concentrically to the walls 5 of the separation chamber 2.

 Through the additional water supply system 26, the density of the medium is adjusted taking into account the quality of the outgoing concentrate. The removal of the separated fractions is carried out through holes 27, 28, 29.

 A three-phase concentrator allows for better quality separation of the concentrate into three fractions by density for one cycle when feeding material continuously and unloading - as soon as the separated fractions are obtained, automatically. Separation of toxic minerals into a separate fraction will streamline the process of utilization or further processing of minerals until the final disposal.

SOURCES OF INFORMATION
1. Patent P N 95101711, A1, LLP Small Enterprise "CENTER", 12.20.96. B 03 B 5/32.

 2. Patent RU 2033268 C1 (Eastern Research Mining and Metallurgical Institute of Non-Ferrous Metals), 04/20/95, B 03 B 5/62.

 3. Patent PU 2045351 C1 (Shevchuk N.K.), 10.10.95, B 03 B 5/32.

 4. Patent SU 977027 A (Irkutsk Polytechnic Institute), 11.30.82, B 03 B 5/32.

 5. Patent SU 4389809 A (LAURENCEH. KONVALIN), 06/21/83, B 03 B 5/02.

 6. GB 5284250 A (GARY F., STERENHOFF), 02/08/94, B 03 B 5/00.

 7. UTsK - 26 - 800 Centrifugal separator Promtehnoresurs JSC.

 8. RF patent N 2033268 C1, 04/20/95, V 03 V 5/62 (prototype).

Claims (1)

 A three-phase concentrator for separating valuable and toxic minerals containing a drive, a separation chamber with a deposition surface of heavy particles, having a compartment for medium density particles and a compartment for low density particles with an overflow threshold made concentrically to the walls of the separation chamber, characterized in that the drive is intermittently mated by means of a screw coupling, connected to a centrifugal exciter installed at an angle to the horizontal plane of the separation chamber, perpendicular about the surface of the deposition of heavy particles and equipped with blades with double-sided rotating impellers, while the surface of the deposition of particles of medium density is made concentric with the walls of the separation chamber and installed at an angle to the deposition surface of heavy particles, under the deposition surface of particles of low density, and the additional water supply system is located above the surface deposition of heavy particles.

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