SU884727A1

SU884727A1 - Self-disintegrating mill

Info

Publication number: SU884727A1
Application number: SU792826097A
Authority: SU
Inventors: Анатолий Павлович Комиссаров; Владимир Александрович Коптелов; Алексей Алексеевич Лаутеншлейгер; Валерьян Афанасьевич Толмачев
Original assignee: Свердловский Ордена Трудового Красного Знамени Горный Институт Им.В.В.Вахрушева
Priority date: 1979-10-10
Filing date: 1979-10-10
Publication date: 1981-11-30

Description

(З) МЕЛЬНИЦА САМОИЗМЕЛЬЧЕНИЯ(3) SELF-MILLING MILL

II

Изобретение относитс к горному и дорожно-строительному машиностроению , а именно к мельницам.FIELD OF THE INVENTION The invention relates to mining and road construction machinery, in particular to mills.

Известна мельница самоизмельчени , состо ща из барабана с торцовыми крышками, снабженными отражательными кольцами, загрузочной и разгрузочной цапф, привода L1.A self-grinding mill is known, consisting of a drum with end caps, provided with reflective rings, loading and unloading trunnions, drive L1.

Недостатком данной мельницы вл етс относительно низка производительность , обусловленна образованием трудно измельчаемых критических зерен и необходимостью остановки мельницы дл их выгрузки.The disadvantage of this mill is relatively low productivity, due to the formation of difficult to grind critical grains and the need to stop the mill to unload them.

Наиболее близким техническим решением к предлагаемой вл етс мельница , содержаща барабан, внутренн поверхность которого выполнена с выступами , расположенными по спирали, обратной направлению вращени мельницы , и имеющими на торцовой поверхности прорези, загрузочную, разгрузочную цапфы и привод 23.The closest technical solution to the present invention is a mill containing a drum, the inner surface of which is made with protrusions arranged in a spiral, opposite to the direction of rotation of the mill, and having slots on the end surface, a loading and unloading trunnion and a drive 23.

Недостатком данной мельницы вл .етс относительно низка производительность , -обусловленна малой величиной скорости транспортировани крупных кусков руды к разгрузочной цапфе и низкой интенсивностью их измельчени в результате того, что параметры спирали, в частности шаг, не вл етс рациональным.The disadvantage of this mill is its relatively low productivity, due to the low speed of transporting large pieces of ore to the unloading trunnion and the low intensity of their grinding due to the fact that the parameters of the helix, in particular the pitch, are not rational.

Цель изобретени - повышение про10 изводительности мельницы самоизмельчени .The purpose of the invention is to increase the productivity of the self-grinding mill.

Claims

This goal is achieved by the fact that in a self-grinding mill that holds a drum, the inner surface of which is made with protrusions arranged in a spiral, opposite to the direction of rotation of the mill, and having a loading, unloading axle and drive on the end surface, the helix has a variable winding pitch increasing to the unloading axle. ; Such an embodiment of the self-grinding mill allows to increase its productivity by increasing the speed of transporting critical grains from the unloading trunnion with a large winding step and increasing the grinding intensity of critical grains by reducing the transport speed and increasing the time of their crushing at a small winding pitch at the loading trunnion. The drawing shows a self-grinding mill, general view. The self-grinding mill consists of a drum 1, the inner surface of which is made with the helix 2 in the reverse direction of rotation of the drum, which has a cutout on the end surface, a loading C and a unloading 5 trunnions and a drive 6. The helix 2 has a variable winding pitch, and 5 maximum and then decreases. The self-grinding mill operates as follows. The grinded material enters the mill through the boot pin k. When the drive 6 is in operation and the drum 1 rotates, the ore pieces rise to a certain height and fall into the lower zone, thus the material autocutes. The resulting critical grains are captured by the coil 2 and at a relatively high speed, due to the maximum pitch of the coiling of helix 2 at the unloading pin 5, transporting it from the unloading pin 5 to the loading pin. 7 Fine material fractions are transported through slots 3 to the discharge pin 5 and are discharged. The transport speed of critical grains is variable and has a minimum value for the boot pin, resulting in intensive grinding of critical grains on the boot pin C in large pieces of ore. The proposed design of the self-grinding mill will increase its productivity by and reduce the energy consumption for grinding by 5-10. Claims of the invention A self-grinding mill comprising a drum, the inner surface of which is made with spiral spins, opposite to the direction of rotation of the mill, and having slots on the end surface, a loading and unloading pin and a drive, the coil has a variable pitch of winding increasing to the unloading trunnion. Sources of information taken into account in the examination 1. V. Karmazin. and others. Processes and machines for mineral processing. M., Nedra, 197, p. 85.

2. USSR author's certificate №, cl. B 02 C 17/18, 1978.