Device to lead particles to separate in a hydrocyclone.
AS AFRICAN AND MALAGASY INDUSTRIAL PROPERTY P. 887 Yaounde (Cameroon) Patent International Patent Classification: 03 № 00829 b. 17 Hr 25 to 29 December 1964 requested Mn to the O.A.M.P.I. (pp.v. no. 51,105) called by the business: Stamicarbon N. V., residing to the Netherlands. Delivered 15 November 1967, published at Device to cause particles to be separated in a hydrocyclone. For good separation, in a hydrocyclone scrubber, mixtures of solid particles of different specific, it is necessary that the mixture is supplied, together with the wash medium, constant pressure to the hydrocyclone. For this purpose, the mixture to be separated is supplied in a reservoir disposed above the hydrocyclone and provided with an overflow for the liquid, the discharge opening of the reservoir being connected freely with the hydrocyclone. In this case, the pressure supply always has a value constant determined by the height of the overflow. The drawback of the known device is that the particles of the mixture which are lighter than the separation medium tend to float in the reser - see, so that they arrive, with the medium débor - bafflement, in the overflow and circulated by the circulation pump. This causes wear additional brake pump and abrasion to advantage - an old light to be purified, in so that the value of sales this product decreases and the accuracy of the sépa - feed ration is adversely influenced by the increased - action of the viscosity of the separation medium. Even if the reservoir is sized such that the speed of the medium is higher than the speed of ascent of the lightweight particles in this medium, the lightweight particles rise along the walls of the tank where the speed the medium is lower and they will occupy and in the overflow. The present invention provides a device in wherein the drawbacks noted above are eliminated. According to the invention, the vessel is divided into a cloi - its substantially vertical, in a first comparti - telling that is provided with means for bringing the particles to be separated and a middle portion of separated - except and is provided at its base with a wide fitting with the lower part of the reservoir, and a second compartment with an overflow and means feeding a portion of the separation medium, this second compartment communicates with the NCIs - ment of the reservoir by a slotted orifice in which is mounted a wedge shaped body which can move in the vertical direction. The speed of the medium in the connection between the second compartment with an overflow and the reservoir can then be substantially higher than the speed of ascent of the lightweight particles, without the need of narrowing the mixing space itself. Using a slotted orifice, communication is provided between the spacious second compartment and the reservoir, while the area extending along the edge of the orifice, where the speed is lower than the mean velocity in the port, is very narrow. By setting the width of the slot by means of the movable body, the device can be adapted to the circumstances in particular the grain size, and specific weight of the material to be separated and the specific gravity of the separation medium. The second compartment communicates, preferably with the reservoir by a circular aperture in which is disposed a valve body shaped like a cone that can move in the axial direction. The invention is further explained below using the example embodiment shown in the attached drawings, in which: Figure 1 schematically shows a jigger hydrocyclone, and Figure 2 is a vertical section of a mixing container. The particles to be separated has are supplied with an amount of slurry discharged from a dispenser tray separation In the orifice 7 is mounted a valve body 8 shaped cone which can be displaced in the vertical direction and be secured by means of a rod 9 and coupling means 10. Through a discharge duct 11, connected to the tip of the mixing reservoir, the mixture flows to a hydrocyclone scrubber 12. The pressure at which the mixture is introduced into the hydrocyclone is constant and is determined by the height of an overflow of the restricted compartment 13 6. 893,485. Centrifugal separators. STAMICARBON N.V. Dec. 19, 1958 [Dec. 20, 1957], No. 41120/58. Class 23. Solids are separated into fractions in a hydrocyclone 12 which is fed at a constant pressure with suspension containing the solids from a tank 4. The tank has compartments 3, 6 supplied with suspension from a container 1. The solids are supplied to the compartment 3 at A. The compartment 6 is permitted to overflow at 13 and has an opening 7 connecting the compartments. The size of the opening is chosen so that solids are prevented from passing from the compartment 3 to the compartment 6. The fractions B, C are drained on sieves 14, 15 and washed in seives 16, 17. The overflow and the suspension drained through the sieves 14, 15 are passed to a tank 18. The diluted suspension from the sieves 16, 17 passes to a separator 19 which discharges suspension to the tank 18, water to the sieves 16, 17 and fine particles D to waste. Suspension from the tank 18 is returned to the feed. The opening 7 may be adjustable. A substantially vertical partition 1° divides the reservoir into a first compartment has means for causing the particles to be separated and a portion of the separation medium, this compartment being connected at its base, by a wide fitting, to the bottom of the tank, and a second compartment with an overflow and means for supplying a portion of the separation medium, the second compartment communicating with the lower part of the reservoir by a slotted orifice in which is mounted a wedge shaped body which is movable in a vertical direction. 2° the compartment with an overflow communicates with the reservoir by a circular aperture in which is mounted a conical body which is movable in the axial direction.■ Company said: STAMICARBON V-N. Proxy: John Matip
