SU862993A1 - Machine for foam separation - Google Patents

Description

(54) FOOD SEPARATION MACHINE

I

The invention relates to devices for the foam separation of mining, mining and non-metallic minerals and can be used in the enrichment processes of coarse and medium-grained materials.

A known foam separation machine, a distinctive feature of which is the presence of a spray gun and guide rails, giving the pulp an oval trajectory of movement necessary for turning the large particles of the floatable material into the froth product.

A machine for flotation and gravity enrichment is also known, in which nozzles in combination with an oval trajectory of particles of aerated pulp 23 are installed to increase the degree of aeration in the loading zone from the side of the extraction chutes.

However, in these machines, the adjustment of the process is difficult, and an increase in the degree of aeration in the loading zone is provided by additional air supply, which leads to an increase in its consumption. In addition, the machine chamber in cross section has a rectangular shape, which is not rational from the point of view of increasing the specific productivity.

Famous machine for foam separation, including a separation chamber

to with tubular azres arranged radially and obliquely in it, overflow threshold, foam receptacle, loading and unloading device: no Gz.

IS

However, in this machine, the supply of aerated pulp to the separation zone is performed in the center of the chamber from a relatively narrow outer airlift vessel, where as a result of the constrained state of the particles there are no conditions for their selective attachment to air bubbles. The presence of azrolift requires elevated

air flow. As the particles slide along the lattice from the center of the chamber to the periphery, the degree of aeration increases in proportion to the area of aerators, and the number of mineral grains decreases, which is not proportional.

The purpose of the invention is to improve the technological parameters of separation by providing complete extraction of coarse and medium-grained material, separation selectivity in combination with high specific productivity and reduced air flow.

The goal is achieved by the fact that the chamber is divided into a ring-shaped form, is formed by walls in the form of truncated cones, while the outer cone is made tapering upwards and the inner one is expanding.

In addition, the loading device consists of a pulverized valve with radially located inclined nozzles and an annular pulp-receiver rigidly connected to the outer wall of the separation chamber.

At the same time, the overflow threshold and the foam receiver are made annular and mounted coaxially to the pulp receiver.

Figure 1 shows the machine, a general view; figure 2 - section aa in figure 1; on fig.Z - section. Bb in fig. 2, distribution pipe; Fig.4.raorez bb In fng.2, overflow pipe and packing device.

The machine consists of a frame 1 with a receiver 2 attached to it for the chamber product, over which the distribution chamber 3, pulp receiver 4 and foam receiver 5 are located. At the top of the machine a pulp distributor 6 is mounted in the form of a segner wheel with radially inclined nozzles 7. Split chamber 3 has an annular shape bounded with an outer wall 8 in the form of a truncated cone, tapering upwards, and with an internal wall - a wall 9 in the form of a truncated cone, expanding upwards. The separation chamber 3 is separated from the receiver 2 of the chamber product by the aerator 10, which is made in the form of concentric rings consisting of perforated tubes 11 connected to distribution tubes 12 and side walls 13,

located radially and obliquely from the center to the periphery. Pulp receiver 4 and foam receiver 5 are made in the form of concentrically located

along the periphery of the separation chamber 3 annular grooves, with the oblique enclosing annular wall 14 of the foam receiver 5 forming the inner side of the pulp receiver 4. The receiver 5

has an overflow threshold 15. Between the inclined annular bottom 16 of the foam foam 5 and the inclined annular bottom 17 of the pulp receiver 4 is formed, but a slot opening for loading

5 pulp into separation chamber 3. Pulp-receiver 4 is rigidly connected to the pen-receiver 5 by radially and obliquely arranged branch pipes 18, designed to discharge the concentrate. The separation chamber 3 in the lower part mates with a vertical wall 19, made in the form of a hollow cylinder, and a vertical wall 19 with a hollow truncated cone 20. Receiver 2 of the chamber product is fixed to frame 1 by means of gusset 21. Hollow vertical cylinder 22 is hermetic connected to the receiver 2 of the chamber product, and the radially mounted plates 23 rigidly connect the vertical wall 19 and the hollow vertical cylinder 22 .. In the center of the annular gap formed by the vertical wall 19 and the hollow vertical cylinder 22, are mounted The elongated nozzles 24 that pass through the packing devices are 25 seconds. gland nuts 26. Salvniki devices 25 are installed coaxially with the nozzles 24 and tightly mated with the receiver 2 chamber product. The lower portion of the receiver 2 of the chamber product serves as the inner wall of the chute 27 for the floated product, tightly connected with its inclined

5 by a bottom 28, which is likewise in communication with the outer wall 29 and the overflow pipe 30. The lower parts of the inclined pipes 18 are connected to flexible hoses 31, the other

0 the end of which is lowered into the chute 27. At the bottom of the machine, at the tip 32 of the hollow vertical cylinder 33 there is a discharge device consisting of a cup 34, which

Claims (3)

5 can be moved in the vertical direction by means of the lever system 35. The glass 34 is provided with upwelling rings 36 and the lower pointed part in an extremely lower position is connected with the nozzle 37, which is rigidly connected to the receiver 2 of the chamber product. Aeration sectors 38 are a structure consisting of a supply pipe 39, to which two rows of distribution pipes 12 with nipples 40 are rigidly attached and two flat side walls 13 are connected. The supply pipes 39 are connected to a collector by rubber hoses 41. consisting of cylindrical boxes 42, vertical pipes 43 and an underwater pipe 44 connected by a rubber hose 45 with a valve 46. The machine works as follows. The cup 34 is brought into contact with the nozzle 37 by the lever systems 35. The chamber product receiver 2 and the separation chamber 3 are filled with the liquor to the level specified by the overflow pipes 24. An additional amount of liquor is poured into the circulating mother liquor (not shown). devices for feeding the circulating mother liquor which can flow either into the annular gap formed by the vertical wall 19 and the hollow vertical cylinder 22 or in the pulp dispensing device 6, or simultaneously but at both points indicated. The excess amount of mother liquor is removed from the machine through the overflow nozzles 24 and enters the device for feeding the circulating mother liquor. Through valve 46, air supply systems (not shown) are supplied. compressed air, whose stable pressure and flow rate are regulated to the extent necessary. In the pulp dispensing device 6, by gravity flow or by a pump (not shown) for a given performance, the pulp of the required density is fed to the appropriate flotation reagents. Under the action of reactive forces, a 1x pulp was created, discharging from the nipple nozzles 7, the pulp distribution of the device 6 and uniformly feeding the pulp into the pulp receiver 4 and along its inclined bottom 17 enters the foam layer of the separation chamber 3. Floating particles under the action of water-air flow the pulps float to the surface of the foam layer and move to overflow threshold 15. Three-phase foam; overflowing with che - "(overflow overflow-threshold 15, enters the receiver 5, where it spontaneously collapses. The flown particles settle to the bottom of the foam receptacle 5 and, as pulp, are removed by gravity through the inclined nozzles 18 and flexible hoses 31 into the groove 27 from where the overflow port 30 unloaded in the form of a finished product or an intermediate product entering a further process stage (not shown). The working number of nozzles 18 is adjusted by installing plugs (not shown) at the contact point of nozzles 18 from the day meters of foam receptacle 5. Meanwhile, the desired density of the froth product discharged as pulp, which can reach 60% solids, is specified. The chamber product or foam separation tails are deposited in the receiver 2 of the chamber product and, by repositioning the lever system 35, are continuously discharged from the machine as a pulp, the density of which can be maintained within the required limits, but not higher than 60% of solid. The proposed machine allows to increase the technological performance of separation and reduce compared to the known production area s to 3.2 times, the volume of production placing 6.0 times, metal content 7.4 times in the machine, the flow of rubber perforated tubes is 2.3 times the compressed air flow rate is 2.3 times. Claim 1. A machine for foam separation, comprising a separation chamber with radialio and tubular aerators inclined in it, an overflow threshold, a foam receiver, loading and unloading devices, in order to improve the technological performance of separation, the separation chamber is made ring-shaped And formed by walls in the form of truncated cones, while the outer cone is made tapering: up, and the inner expanding. 2. A machine in accordance with claim 1, wherein the loading device consists of a pulverized valve with radially arranged inclined nozzles and an annular pulp receiver rigidly connected to the outer wall of the separation chamber. 3. The machine under item 1, about tl and. This is due to the fact that the overflow threshold and the foam receiver are annular and mounted coaxially to the pulp receiver. 629938 Sources of information taken into account in the examination I. USSR Copyright Certificate No. 241352, cl. At 03 O 1/14, 1963. 5 2. USSR author's certificate No. 232869, cl. At 03 O 1/14, 1966. 3. USSR author's certificate No. 273095, Ll. In 03 D 1/20, 1968 (prototype). ui.tf