SU1209294A1 - Installation for fine mincing of hard materials - Google Patents

Description

The invention relates to the technique of fine dry grinding of solid materials, in particular to grinding in centrifugal-reflective mills, and can be used in the energy, chemical, chemical-metallurgical, jewelry and other industries, as well as in the building materials industry.

The purpose of the invention is the development of productivity.

FIG. 1 shows the proposed installation, a vertical section; in fig. 2 shows section A-A in FIG. 1, in FIG. 3 shows the node I in FIG.

The installation includes a stepped body 1 with baffles 2, a stepped rotor 3 mills with beaters 4, in the second stage of which instead of the beats there are abrasive elements 5 freely moving in the radial direction in the radial grooves, a movable cup-shaped disk 6, a fixed cup-shaped disk 7 with a loading hopper 8 which form a primary crushing chamber 9, a discharge pipe 10 for:, removing solid (metal) non-grindable particles, a slam-shut II, a damper 12 and a discharge pipe 13 for the finished product .

Ustnovka works as follows ..

A stepped rotor 3 is driven into rotation. The grinding material is poured through the hopper 8, from which it enters the primary crushing chamber 9, in which it is crushed when the movable bowl-shaped disk 6 is moved relative to the fixed bowl-shaped disk 7.

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If solid (metal) bodies that are not crushed fall into the pre-crushing chamber, the fixed disk pushes the dump lamp 5 of the headlights 12 and the body, slipping along the shutter P, into the discharge port 10. The crushed material is exposed to the air flow produced by the rotating step-by-step roto - rum 3, is sucked into the first stage and under the action of centrifugal forces and the air flow falls under the rapidly rotating first stage billes 4, is thrown onto the impeller cyt i the lyrical ring of the body 1 with the baffle bars 2 pulverized due to the impact.

Crushed on the disk of the first stage of the piece of material is extracted

20 to the second stage, where they are further crushed by abrasive elements 5. Grinding at the third stage is the same as in the first stage.

2 i The ground material is injected by the third stage of the mill into a discharge pipe 13 for further processing.

As a result of the combined

30 exposures: wipe in chamber

pre-crushing, impact crushing in the first stage, additional attrition effect in the second stage and impact impact in the third stage of the mill, the productivity of the process is increased, since there is no need for re-grinding, energy consumption for

40 units of finished product and improves the uniformity of particle size distribution.

Phi.1.2

Editor N. Tupitsa

Compiled by L, Chubukova

Tehred M. Nadia Corrector I. Muska

348/13

Circulation 583 Subscription

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

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Claims (1)

INSTALLATION FOR FINE GRINDING OF SOLID MATERIALS, which contains a primary crusher with a feed buoy · rum and a rotary step mill sequentially located in the casing, as well as discharge nozzles and a drive, which can be used to increase productivity, one of the stages of the rotor mill is made with radial grooves, in each of which an attrition element is freely inserted.