SU919725A1 - Apparatus for sintering powdered materials - Google Patents

Description

(5) DEVICE FOR AGGLOMERATION OF POWDERED PRODUCTS

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The invention relates to the granulation of materials, namely, a device for the agglomeration of powdered materials. A device for the agglomeration of fine powders is known, comprising an agglomeration chamber with pipes for supplying the powder material and steam. Means for supplying air. In this case, a fine powder from the hopper is fed by a screw into a pipe, at the exit of which it is mixed with a stream of steam. The powder is then moistened and agglomerated when the particles collide. The means for supplying air maintains the temperature of the particle surface necessary for the condensation of the vapor Sch.,

The moistened powder particles stick together with each other more efficiently, if a bonding fluid is included in the condensation film on the surface of the particle. Especially this

refers to products of inorganic origin. However, the known device does not contain an element for injecting a binding liquid. In addition, in the known device, no means is provided for the organized collision of the moistened particles. All this reduces the likelihood of aggregation of the particles. The output of the agglomerated product.

The aim of the invention is to develop a device for the agglomeration of powdered products, allowing an increase in the yield of the agglomerated product.

This goal is achieved by the fact that the device containing the sintering chamber, pipes for supplying powdered material and steam and medium for supplying air is equipped with a mixing chamber installed in the upper part of the sintering chamber and having a nozzle for dispersing the binder liquid and a branch pipe for 391 supply a pair, and a screw insert installed in the sintering chamber under the mixing chamber. The drawing shows the device, a longitudinal section. The device comprises an agglomeration chamber 1, a pipe 2 coaxially arranged with it for the introduction of the product, a nozzle 3 for feeding into the agglomeration zone of the binding agent. The nozzle 3 has a mixing chamber C located above the chamber 1, where a gaseous binding agent and a binding fluid that is sprayed by the auxiliary nozzle 6 flow tangentially into the sintering chamber 1. In the sintering chamber 1 there is a screw insert 7. The device operates as follows. . Fine-dispersed powdery product to be agglomerated from the metering device (not shown) goes through pipe 2 to sintering chamber 1. Blends into the mixing chamber if, tangentially, with a binding agent, for example, saturated water (lap, at a pressure of 2 atm. There through pneumatic The nozzle 6 is supplied in a spray state with water in a ratio of 2 kg per I kg of steam. The heat content of steam in the mixing chamber is partially absorbed during evaporation and heating of the sprayed water. Steam duct from the mixing chamber through the ring At the speed of 100–200 m / s, the second slit 8 flows out as a swirling flow into the sintering chamber 1, and injects air from the environment through the air supply means, which is formed as holes 9. The steam condenses due to the additional heat consumption for air heating. When steam escapes from the annular gap 8 from the pipe 2, the initial fine product is injected, which is entrained by the vapor-gas liquid flow, is humidified, and moves in the spiral direction in the axial direction of the chamber 1. During operation of the known devices the source powder-e with particles of 50-120 microns in diameter, which are used as fodder yeast, the yield of agglomerated particles with a diameter of 0.2-1.5 mm is not more than 0%. When using the proposed device, the yield of the indicated fraction is increased to 9. The claims of the invention. A device for agglomerating powdered products, comprising an agglomeration chamber, pipes for supplying powdered material and steam and means for supplying air, characterized in that, in order to increase the yield of the agglomerated product, the device comprises a mixing chamber with a nozzle for dispersing the bonding liquid and the pipe for inlet a pair installed in the upper part of the sintering chamber, and a screw insert installed in the sintering chamber under the mixing chamber. Sources of information taken into account in the examination 1. French patent number 13932 8, l. From 01 To, publish. 1965 (prototype)

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Claims (1)

Claim . A device for agglomeration of powdered products containing an agglomeration chamber, pipes for supplying powdered material and steam and means for supplying air, characterized in that, in order to increase the yield of the agglomerated product, the device comprises a mixing chamber with a nozzle for dispersing a binder liquid and a pipe for supplying steam installed in the upper part of the sintering chamber, and a screw insert installed in the sintering chamber under the mixing chamber.