RU2101093C1 - Method and apparatus for dressing diamonds - Google Patents

Abstract

FIELD: mineral dressing. SUBSTANCE: screened material is used to form air mixture, which is fed through X-ray chamber and photomultiplier into separation chambers where air mixture is stepwise recleaned by way of reducing cross- section of air mixture stream and separating air mixture into tails and concentrate. Apparatus additionally has air-pumping unit, air mixture formation chamber and convergent tubes forming separation chambers which, in each next dressing step, contain their own electromechanical gates and have narrower open flow areas as compared to preceding separation chambers. EFFECT: enhanced efficiency of process. 2 cl, 1 dwg

Description

 The invention relates to the mining industry and is used to enrich diamonds from rocks.

A known method of beneficiation of diamonds from rocks, including the separation of material by size and its dispersion on a moving surface, and the selection of diamonds is carried out using x-ray luminescence [1]
A device for producing a method is known, consisting of a classifier and a conveyor belt equipped with an X-ray camera [2]
A disadvantage of the known method and device is their low efficiency due to the limited enrichment rate on moving surfaces.

 The aim of the invention is to increase the efficiency of the method by increasing the rate of diamond beneficiation and, consequently, increasing the productivity of the method.

 To achieve this goal, a method of enrichment of diamonds from rocks, including separation of material by size and separation of diamonds from the screened material in X-ray luminescent separators to obtain concentrate and tails, consists in the fact that after separation of the material by size of the screened material, an air mixture is formed, from which then the concentrate is isolated by cleaning the aerosol in the separation chambers, the flow cross section of which is reduced along the direction of the air mixtures at each subsequent stage.

 To achieve this goal, a device for the enrichment of diamonds from rocks, including a classifier, feeder, X-ray luminescent separator, containing an X-ray camera, protected by a screen, a photomultiplier, an electromechanical damper with a drive connected by an electronic control circuit to a photomultiplier, and nozzles for removing tails and concentrate are provided air-injection unit, the chamber of formation of the air mixture, sequentially in the direction of movement of the air mixture installed confusers, form their separation chamber, which in turn equipped with its own electromechanical damper actuators and photomultipliers with electronic control circuits and nozzles for discharging tailings and concentrate, wherein each successive separation chamber while moving fuel mixture has a minimal flow cross-section than the previous one.

 The drawing schematically shows a device for the enrichment of diamonds from rocks, where 1 classifier, 2 feeder, 3 x-ray luminescent separator, 4 x-ray camera, 5 screen, 6 photomultiplier, 7 - electromechanical damper, 8 damper actuator, 9 electronic control circuit, 10 nozzle for tail removal, 11 pipe for concentrate removal, 12 air injection unit, 13 air mixture formation chamber, 14 confuser.

 The method is as follows.

 The rock mass containing diamonds, previously separated by size in the classifier 1, is fed continuously through the feeder 2 to the X-ray luminescent separator 3, where under the influence of the flow created by the air-blower 12 in the chamber 13, an air mixture is formed, which then passes through the X-ray chamber 4 and the photomultiplier zone 6 into the separation chamber of the confuser 14, where the shutter 7, controlled by the electronic circuit 9, separates the air mixture into tails and concentrate, which are discharged accordingly specifically, through nozzles 10 and 11. Then, the mixture is enumerated in subsequent separation chambers similar to each other, where to increase the diamond concentration in the mixture in each subsequent separation chamber, the live section of the mixture flow is reduced by the passage sections of the chambers and the process of separation of the mixture into tails and concentrate is repeated.

 Device for the enrichment of diamonds works as follows.

 The rock, previously crushed, containing diamonds, is first sent to classifier 1, where the crushed material is separated by size, and the obtained screened material is sent through feeder 2 to the formation chamber of the air mixture 13 of the X-ray luminescent separator 3. After obtaining the necessary volume concentration of the air mixture, which is achieved by regulation volumes of air and material supply, the air mixture enters the X-ray chamber 4, equipped with a protective screen 5. The photomultiplier 6, upon detection of shining The diamond crystal in the flow of the mixture gives an electrical signal to the control circuit 9, which includes the actuator 8 of the electromechanical shutter 7 to temporarily open the channel 11 and close the channel 10. After the shutter 7 is activated, the part of the mixture containing diamond will be cut off from the previously opened channel 10 and rushes through the channel 11 into the subsequent separation chamber, which has a smaller passage section than the previous separation chamber. In the subsequent separation chambers, which are made similar to each other due to decreasing flow cross sections, the "portion" of the mixture mixed by the shutter 7 will decrease in volume, which will generally increase the concentration of diamonds in the mixture. Moreover, in order to reduce the actuation period of the shutter 7 and reduce the material consumption of the device, the X-ray luminescent separator is equipped with confusers 14.

Claims (2)

 1. A method of enrichment of diamonds from rocks, including separation of material by size and separation of diamonds from diamonds in X-ray fluorescence separators to obtain concentrate and tails, characterized in that after separation of material by size from the screened material, an air mixture is formed, from which concentrate is then isolated by cleanings of the air mixture in the separation chambers, the passage section of which is reduced along the air mixture at each subsequent stage.  2. A device for the enrichment of diamonds from rocks, including a classifier, feeder, X-ray luminescent separator containing an X-ray camera, protected by a screen, a photomultiplier, an electromechanical damper with a drive connected by an electronic control circuit to a photomultiplier, pipes for draining the tailings and concentrate, characterized in that it is equipped with an air-blower installation, a chamber for forming the air mixture, sequentially, in the direction of movement of the air mixture, installed by confusers, forming and dividing the chamber which, in turn, provided with its own electromechanical actuators and dampers with photomultipliers with electronic control circuits and nozzles for discharging tailings and concentrate, wherein each successive separation chamber while moving fuel mixture has a minimal flow cross-section than the previous one.