SU912285A1

SU912285A1 - Pulp aeration apparatus

Info

Publication number: SU912285A1
Application number: SU782689777A
Authority: SU
Inventors: Владислав Иванович Волков; Владимир Константинович Егоров; Анатолий Николаевич Шулико
Priority date: 1978-11-27
Filing date: 1978-11-27
Publication date: 1982-03-15

Description

Изобретение относится к флотационным устройствам, в частности к устройствам для аэрации пульпы, которые являются частью флотационной машины, которая относится к средствам обогащения полезных ископаемых, предназначено для насыщения пульпы воздухом и ее перемешивания и может быть использовано в угольной промышленности, а также для обогащения руд, цветных и черных металлов.The invention relates to flotation devices, in particular to pulp aeration devices, which are part of a flotation machine, which relates to mineral processing, is intended to saturate the pulp with air and mix it, and can be used in the coal industry, as well as for ore dressing, non-ferrous and ferrous metals.

Известны аэрационные устройства, основным рабочим органом которых является аэратор, засасывающий воздух, диспергирующий его на мелкие пузырьки и перемешивающий их с пульпой [ 1].Known aeration devices, the main working body of which is an aerator, sucking air, dispersing it into small bubbles and mixing them with pulp [1].

Однако для известных конструкций аэраторов характерны недостаточное дробление воздушных пузырьков в случае засасывания большого количества воздуха, неравномерное распределение диспергированного воздуха по объему камеры, недостаточная циркуляция пульпо-воздушной смеси в Нижней части камеры, и перемешивание пульпо-воздушной сме^¹ся.However, known designs of aerators characterized insufficient crushing of air bubbles in the case of large suction air quantity, the uneven distribution of dispersed air chamber volume, insufficient circulation of the pulp-air mixture in the bottom of the chamber, and mixing the pulp-air CME ^ ¹ camping.

Известно также устройство для аэрации пульпы, включающее полый вал, на котором закреплен аэратор, выполненный в виде вертикальных стержней, закрепленных на диске, и лопастной статор. Аэратор вращается внутри неподвижного статора. Диспергирование воз· духа осуществляется на выходе из импеллера при прохождении между его стержнями и при ударе о лопатки статора, обеспечивающие также гашение турбулентных потоков, образуемых импеллером [2].A device for pulp aeration is also known, including a hollow shaft on which an aerator is mounted, made in the form of vertical rods mounted on a disk, and a blade stator. The aerator rotates inside a fixed stator. Dispersion of air is carried out at the exit of the impeller when passing between its rods and when it hits the stator blades, which also suppress turbulent flows formed by the impeller [2].

Недостатком указанной конструкции является то, что установка стержней по периметру аэратора не -обеспечивает высокой степени перемешивания, ‘способствующей предварительному диспергированию пузырьков воздуха, так как процесс диспергирования воздуха осуществляется на .малой длине, соответствующей длине стержня. Кроме того, увеличение подачи воздуха, требуемое по технологическим условиям, приводит к значительному падению производительности импеллера по пульпе, что отрицательно сказывается на эффективности перемешивания, диспергировании пузырьков воз-The disadvantage of this design is that the installation of the rods around the perimeter of the aerator does not provide a high degree of mixing, which contributes to the preliminary dispersion of air bubbles, since the process of dispersing air is carried out over a small length corresponding to the length of the rod. In addition, the increase in air supply required by the process conditions leads to a significant drop in the impeller performance over the pulp, which negatively affects the mixing efficiency and dispersion of the bubbles

кой и газообразной фаз, а это приводит к лучшему перемешиванию многокомпонентной смеси и диспергированию воздуха за счет увеличения длины смешения и создания условий.and gaseous phases, and this leads to better mixing of the multicomponent mixture and dispersion of air by increasing the length of mixing and creating conditions.

предварительного диспергирования воздуха по радиусу ротора, что в конечном итоге позволяет получить более дисперсные воздушные пузырьки.preliminary dispersion of air along the radius of the rotor, which ultimately allows you to get more dispersed air bubbles.

За счет улучшения диспергирующей способ ?0 ности аэратора и перемешивания пульпы в лабораторных и промышленных условиях получено увеличение производительности флотационной машины по угольной пульпе, выхода концентрата и улучшение качества продуктов обогащения.By improving the dispersing ability of the aerator and mixing pulp in laboratory and industrial conditions, an increase in the productivity of the flotation machine for coal pulp, yield of concentrate, and improvement of the quality of enrichment products were obtained.

Claims

The invention relates to flotation devices, in particular, to yctpoficTeaM for pulp aerasts, which are part of a flotation machine, which refers to the means of mineral processing, intended to saturate the pulp with air and mix it and can be used in the coal industry, as well as for enrichment of ores, non-ferrous and ferrous metals. Aeration devices are known, the main work of which is an aerator, sucking in air, dispersing it into small bubbles and mixing them with pulp 1. However, the known designs of aerators are characterized by insufficient fragmentation of air bubbles in case of suction of large amounts of air volume of the chamber, insufficient circulation of pulp-air budgets in the lower part of the chamber, and re-mixing of pulp-air mixtures. It is also known a device for aerating the pulp, comprising a hollow shaft on which an azrator is mounted, made in the form of vertical rods attached to a disk, and a paddle stator. The aerator rotates inside a fixed stator. Dispersion of a BHG spirit occurs at the exit from imLeller when passing between its rods and hitting the stator vanes, also ensuring damping of turbulent flows formed by the impeller 2. The disadvantage of this design is that the rods are not installed at the perimeter of the aerator which does not provide a high degree mixing, which promotes preliminary dspergirovanie air bubbles, since the process of dispersion of air is carried out at a small length corresponding to the length of the rod. In addition, the increase in air supply required by technological conditions leads to a significant drop in the performance of the impeller in the pulp, which adversely affects the mixing efficiency, dispersion of the bubbles in the 39th spirit and ultimately the effective floatation process. The purpose of the invention is to increase the degree of pulp aeration. To achieve the goal, in the device the rods are grouped and in each group the rods are arranged in an arc, forming an -c-hp / p scapula. Fig, 1 shows the device, - Q6aiSffl view; in fig. 2 shows section A-A in FIG. 1. The device includes a rotating poland shaft 1, on which the dikes 2 of the aerator 3 and the wheel of an axial pump 4 are attached. At the dask, 2 forcing the rods 5, which are assembled in the grooves 6, in each of which the rods 5 are arranged along an arc, forming the outline of the blade 7, the ALrator 3 rotates inside the fixed. stator 8 with blades 9. Air is supplied through openings 10 of the hollow shaft 1, as well as holes in the tuyere 1 of the collector 12. The device operates as follows. When the hollow shaft 1 rotates, the pulp along with the air from the lower part of the flotation cell is fed by the wheel of the axial pump 4 through the collector 12 with the tuyere 11 to the aerator 3. Air dispersion. axis;; in two stages: when it passes through the rods, the torus 3 has a rising air and when it strikes 9 of the stator 8. In particular, the device of the blades of the aisle in the widens of the individual sterage is caused by the fact that it breaks down into a series of emendaric streaks, which is moved to the surface; This results in better mixing of the multicomponent mixture and dispersion of air due to an increase in displacement and conditions, preliminary dispersion of air along the rotor radius, which in a finite way allows to obtain more dispersed air bubbles. An increase in the productivity of the flotation machine on coal pulp, concentrate yield and an improvement in the quality of enrichment producers was obtained by using the dispersion method of the aerator bone and pulp transfer in laboratory and industrial conditions. The invention The device for aeration of the pulp, comprising a hollow shaft, on which is mounted an aerator, made in the form of vertical rods. fixed on the disk, and a blade stator, characterized in that, in order to increase the degree of aeration, the pulp rods are grouped and in each group of rods are arranged in a taure, image. KoyTu blades. Istochnikinformatsin taken in Bmniany with spertase 1. Zakhvgtkin B, 1C. and others. Modern foreign flotation machines. Tsvetmetinformatsi, M., 1971, p. 9-13.

2.Mest | ov N.F. Flotation machines. Nedra, M., 1972, p. 52-53 (prototype).