SU1464383A1 - Line for producing metal powder from slurry metal waste - Google Patents

Abstract

The invention relates to lines for the production of metal powders from sludge metal waste, the purpose of which is to increase operational reliability and expand technological capabilities by processing all types of sludge. The slurry slurry entering the settling bunker is fed through a trunk pipeline to the feed hopper, from where excess coolant is drawn off by the pump. With a screw conveyor, the sludge is fed to a press to remove residual coolant, and then, with the help of a rotary conveyor, is ejected onto the surface of a rotating baffle disk, from where the sludge enters the extruder. The extruder enters the conveyor oven where it is sintering and, at the exit from the refrigerator, the furnace is crushed. The resulting loose mass enters the mill, and then, at the vibrating screen, is divided into powder and grinding. The latter is recycled for grinding, and the conditioned powder is fed first into the bunker-filler, and then into the mixture for averaging the powder over the grain-size and chemical compositions. The use of this line allows to increase its operational reliability, as well as to expand its technological capabilities. 1 il. G P f vEBSaii

Description

I

The invention relates to powder metallurgy.

The aim of the invention is to increase the operational reliability and expand the technological capabilities by processing all types of sludge with

The drawing shows a line for the production of metal powder from sludge metal LAYS.

The line consists of a settling bunker I, a device 2 for transporting pulp, a main pipeline 3, a feeder bunker-4,

equipped with a device for collecting and removing coolant (coolant) and a screw conveyor 6, located at the bottom of the feeder hopper, a screw pressing device (press) 7, rotary conveyor (ejector) 8, fender disk device 9, screw screw extruder 10, stacker 11 extruder with conveyor 12, conveyor oven 13 with a refrigerator 14 ,. ripper 15 sinter, pipelines 16, bunker 17, sluice feeder 18, vibrating mills (or planetary

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centrifugal) 19, vibrating screen 20, cyclones 21, hopper 22 and blender 23.

Linie works as follows.

The sludge slurry entering the settling bunker 1, using Device 2 via trunk pipeline 3, is fed into the pita ™ bunker 4. The slurry passes through wet magnetic separation directly at the metalworking machine собира is collected in the receiving bin at the machine (the bunker and the machine in the scheme are shown) and then transported by truck to the bunker 4 and unloaded into it. The bunker-feeder is equipped with a device 5 for collecting and removing coolant (a pump that removes excess coolant from the upper line of sludge loading) Someone conveyor 6j placed in the bottom part of bunker therapist 4, the sludge is fed to the screw press 7 to remove residual coolant Cleared from the coolant (to a predetermined moisture level) the sludge enters the receiving hopper (not shown) of the rotor conveyor 8j, with which it is thrown out with a large growth onto the surface of the baffle bottom device 9 (rotating baffle disk). From the latter, the scraper is removed by the scraper (which is not shown by the guides to the receiving bin (not indicated) of the extruder 10 "Through the spunbond 4 grid (not shown) ext The cuttings are transported onto the conveyor 12 of the stacker II, which, with a layer of height of predetermined height, places the extrudate on a belt (not shown) of the conveyor furnace 13. In the furnace, the extrudate is sintering with simultaneous removal of impurity oxygen and carbon from it ,, 06 developed during sintering low strength sintered tape at the exit from holo-. The furnace 14 of the furnace 13 is destroyed to individual fragments using a ripper 15o. The extrudate mass formed from the dry mass is cyclone 21 through the pipe 16 and is reloaded into the hopper 17. From the latter, the extrudate is fed (metered) using a rotary sluice feeder 18 to grinding Vibroscrew mill 19, Grinded product by gravity once

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loaded onto the vibrating screen 20, which classifies the crushed product into high-quality powder and domino, Domol returns to the hopper 17 with the aid of a cyclone 21, and the cyclone 21 transports the powder into the storage hopper 22,

Each cyclone 21 is equipped with an autonomous trunk system and its own fan (not shown). After filling the storage hopper 22, a batch of powder is transferred to the mixer 23, in which the mass is averaged over the chemical hour and the particle size composition, which ensures the constant technological properties of the powder.

From the blender 23, the powder is transferred to a transport intermediate bin (not shown), which is a feeder for a packaging machine (not shown).

Below are the characteristics of the powder made from the sludge formed during the filing and running in bearing balls.

Particle size indication, mm 0.25 Thickness, g / cm. 2.0-2.4 FlowabilityJ g / s, 1, Formability g / cm 3.2-7 | 2 Sealing at press pressure

4 t / cm, g / cm 6.2 .7 t / cm, g / cm 7.2 Content of carbon of the genus, wt.% 40j, 15 Content of the oxygen, wt.%, 25 The use of the proposed line ensures constant the quality (grade) of steel powder will significantly reduce the laboriousness of the process, improve the sanitary conditions of production, significantly increase operational reliability and expand the technological capabilities of the line due to the additional processing of sludge collected directly from mechanical processing machines,

The task of increasing the operational reliability of the line is solved by means of the screw screw clamping device 7, the rotary conveyor 8, the bumper disk device 9 (the metal rejecting elastic

items), as well as reducing the number of crushing and grinding equipment.

The technological capabilities of the line are expanded as a result of equipping it with a bunker-feeder 4 equipped with a screw conveyor, which makes it possible to use for processing time the kinds of sludge produced during metal working.

Claims (1)

Invention Formula Lines for the production of metal powder from sludge metal waste, including a settling bin, a device for transporting pulp and a screw extruder. BAZZZ6 The device for placing the extrudate on the conveyor, the furnace, the device for the destruction of the cake, and the pneumatic conveying installations differ from the fact that, in order to increase the operational reliability and expand the technological capabilities by processing all types of sludge, 0 screw conveyor and device BON for collection and removal of coolant, screw screw 5 rotary conveyor and t5 slaughter disk device for separating large metal including mounted between the bunker-rack and screw extruder, as well as the mill, located 20 38 device for the destruction of the cake. tL ip gtrep.