SU1404154A1 - Complex mechanized line for producing finely dispersed casting filler - Google Patents

Abstract

The invention relates to foundry, in particular, to the technological enrichment of foundry fillers used in molding and. core mixes x. The purpose of the invention is to improve the quality of the filler by increasing its refractoriness and reducing the volume expansion coefficient, as well as expanding the technological capabilities of the line. This goal is achieved by supplying a known line containing a feedstock bin, a finished product bunker, a reactor 3 for cleaning the surface of the filler grains from foreign inclusions, a drying chamber 15, a screen and vacuum filters, a quartz furnace 11, a cooling chamber 13 and an electrohydraulic crusher 14 to obtain a semifinished product of fused quartz, as well as a wet grinding mill and disintegrators, and to prepare the fused quartz for screening in fractions. Non-conforming fractions of fused quartz, Those made during the production of the foundry filler are processed by the same line, which dramatically increases the yield of the product. 2 Il. i ate

Description

four

About 4:

SP

.

114

The invention relates to foundry, in particular, to the technology of enrichment of foundry fillers used in molding and core mixtures.

The purpose of the invention is to improve the quality of the filler by increasing its refractoriness and reducing the coefficient of volumetric expansion, as well as expanding the technological capabilities of the line.

: FIG. Figures 1 and 2 show a diagram of a complex mechanized line D4 for the production of various fractions of melted quartz.

; Line contains equipment for. about | the sources of the original quartz sand, in I which includes a receiving hopper 1 with I, located in its lower part, a hydraulic feeder 2, interacting with a sand purification reactor 3 connected by means of a coupled mechanism 4 with an installation 5 for drying and cooling sand. The latter is connected by an elevator 6 to a polygonal sieve 7 located above the binker 8, in the lower part of which the receiving device of the pneumatic conveying system 9 is located, which has access to the hopper 10 for dry sand. B fHKep 10 is connected by two grooves to the smelting furnace 11. Below the level of the furnace 11 is a bunker 12 dL of sand spill collection connected by pneumatic transport 9 to the bunker 10. 3ai of the quartz melting furnace 11 are sequentially connected with each other by overhead transport (not pkazan) chamber 13 for cooling

and cleaning the quartz block, an electro-hydraulic unit 14 for crushing it, a drying chamber 15, a bunker 16 for receiving pieces of glass (not fully fused quarters) and a bunker 17 for receiving pieces of fused silica. The bunker 16 is connected to a vibrating feeder 18 with a combi-milling crusher 19 for grinding glass, located above the bunker 20 connected by a pneumatic transport system 9 to the bunker 10 for receiving dry sand.

The bunker 17 for receiving pieces of fused silica has, at the bottom S, a feeder 21 interacting with a rotor or hammer crusher 22 for grinding pieces of fused silica, communicating with the bunker 23. The last

42

connected by pneumatic conveying 24 to bunker 25, at the bottom of which there is a sluice feeder 26 located above a multi-racket screen 27, having receiving devices 28 for four fused silica fractions, connected by pneumatic conveying 24 to bunkers 29 for finished products and with a bunker 30 for semi-finished products of pulverized fused 29 for finished products and for 30 semi-finished products for pulverized fuzzy fused 29 for finished products, and for 30 semi-finished products for fused silica .

The airlock feeder 31 of the hopper 30 is connected to a dry-grinding mill 32 having an outlet to the hopper 33, in the lower part of which a pneumatic conveying receiver is installed to supply the semi-finished product of dust-like quartz to the precipitator hopper 34.

The hopper 34 through the airlock feeder 35 communicates with the wet grinding mill 36, and the latter with the reactor 37 connected by a pressure line 38 through the supply tank 39 with a vacuum belt filter 40 having a drum dryer 41 outlet, which is connected to a dry grinding disintegrator 42, for example, a spherical drum mill of particles of pulverized quartz, connected by pneumatic transport through an intermediate bunker 43 to a bunker 44 of the final powdered quartz. At the places of operation of the pneumatic transport, a valve is provided for a donor system 45, the output of which is equipped with a cyclone 46 connected to the hopper 30. The line operates as follows. The raw material (quartz sand) enters the receiving grid of the hopper 1 and with the help of a screw feeder 2 is fed to the reactor 3 for wet sand cleaning, where sand is separated from clay and dust. The washed sand through the chute is discharged into the bucket of the skip mechanism 4, which has a drainage net for draining water and transferring the sand to the installation 5 for drying and cooling. Then, with the help of an elevator 6, dry sand is fed to a poly sieve 7 for the selection of stones and other inclusions. The sifted sand from the bunker 8 through the receiving device of the pneumatic transport 9 is transferred to the bunker 10, from where the sand enters the quartz-smelting furnace 11 through two grooves, where it is melted to form a quartz block. From the furnace 11, a quartz block with the remnants of unfused sand enters the grid of the bunker 12, through which sand spills into this bunker and the system of pneumatic transport 9 returns to the bunker 10 for reuse. The quartz block is transferred to the chamber 13, where the block is cooled and the glass block is separated from it, and then to the electro-hydraulic unit 14 for crushing. Pieces of crushed quartz lump enter the chamber .15 for drying.

Separate pieces of unequal quartz (glass) from the cooling chamber 13 are fed into the container into the chamber 15 for drying, from there to the combined crusher 19 and through the hopper 20 with a pneumatic conveyor 9 into the hopper 10 for reuse.

Dried pieces of fused silica are fed into the bunker 17, and from there the feeder 21 is fed to a rotary or hammer crusher 22. The crushed quartz is poured into the bunker 23, from where the pneumatic conveying system 24 is fed to the bunker 25 and through a pinch feeder

26v multi-vibrating screen

27dl sieving into fractions and waste separation i Three granular fractions, ready for use, are driven by pneumatic transport into the bunker 29 of finished products, and a fourth, smaller, into the bunker 30. Dust-like waste collected by ventilating system 45 at work sites dust and cycling equipment 46.

From the hopper 30, the semi-finished product of dust-like quartz through the feeder 31 enters the dry grinding mill 32, crumbles into the bunker 33 and the pneumatic transport system 24 is sent to the hopper 34. From the hopper 34 through the pin-fed feeder 35, the semi-finished product of quartz-shaped quartz enters the wet grinding mill 36 from it is fed to the reactor 37 with a sharpener, and from there the composition is pumped by the Sand pump 38 through the supply tank 39 to the ribbon vacuum filters 40. The dehydrated mass enters the drum dryer 41. from which dried pulverized

 the quartz is sent to a dry grinding disintegrator 42 to grind the dried pieces of powdered quartz. From the mill 42, through the intermediate hopper 43, dust-like quartz is supplied to the bunker 44 of the finished product.

The proposed complex mechanized line makes it possible to obtain various qualitative fractions of fused silica, including dust, and to avoid product losses at all stages of its processing.

Claims (1)

Invention Formula A complex mechanized line for obtaining a finely dispersed casting filler, containing transport hoppers, transport reactor for cleaning the surface of the filler grains from foreign inclusions, a drying chamber, a multi-drift screen, a finished hopper products and vacuum filters, characterized in that, in order to improve the quality of the filler by increasing its refractoriness and reducing the volume expansion ratio, as well as expanding the technological capabilities of the line, it is equipped with a quartz melting furnace, a cooling chamber, an electrohydraulic crusher, a mill milling, drying and two dry milling disintegrators, while the quartz smelting furnace, cooling chamber and electrohydraulic crusher are placed in the technological sequence after Reactor for cleaning the surface of the filler grains from foreign inclusions and technologically connected through a drying chamber and a dry grinding disintegrator, which is a impact type crusher, mainly rotary, with a multiheater screen, a wet grinding mill is installed after the screen and connected through vacuum filters and dried with another dry-milling disintegrator, represented by the 1M as a drum mill of a predominantly ball, rod or pebble type. M