SU1320017A1 - Installation for bleaching remains of ceramics and washing the castings - Google Patents

Abstract

The invention relates to foundry, to leaching of ceramic residues and washing castings in castings according to smelted models. The aim of the invention is to reduce the consumption of liquor and water in the production of precision casting. The installation comprises a cylindrical drum with an alkaline compartment 1, a washing compartment 2 and a perforated attachment 3 with a perfume attachment. Nodes 5 and 6 serve to regenerate the spent alkaline solution, which consists in its reagent treatment and separation of the resulting solid phase. In unit 7, the sludge is separated from the washing water, which is then transferred to the alkali compartment, and in unit 8, the sludge is separated from the shower water used as washing water. Nodes 6, 7 and 8 communicate with each other in such a way that the same water is used to wash the sludge and the solid phase from alkali and silicates, which after neutralization is supplied to the perforating attachment of the perforated attachment 3. 1 sludge. Q (L 2t 23

Description

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one . 1 The invention relates to foundry, equipment for cleaning and washing of castings in the production of precision casting on the produced model.

The drawing shows a schematic diagram of the device.

The device contains an alkaline compartment 1, a washing compartment 2 and a perforated prefix 3 with a damping element 4. The alkaline solution regeneration unit 5 contains a reactor with a stirrer or barbater and a reagent dispenser (not shown). The solid phase separation unit 6 alkaline solution after reagent treatment, the water washing sludge separation unit 7, the washing water sludge separation unit 7, the washing water sludge separation unit 8 and the neutralized water solid separation unit 9 contain mechanical dewatering devices, for example, filter presses shown). Neutralization unit 10 contains a reactor with a stirrer or bubbler and an acid metering device (not shown). The inlet of the alkaline treatment regeneration unit 5 is connected via pipe 11 with the alkali compartment 1, and the output of this node through pipeline 12 is connected to the inlet of the alkaline solution solid separation section 6 after the reagent treatment. In turn, the exit of the unit 6 is communicated via line 13 with the alkali compartment 1 and through line 14 to the inlet of the neutralization unit 10. The inlet of the washing sludge separation unit 7 is connected via pipeline 15 to the washing compartment 2 and via pipeline 16 to the outlet of the separation unit 8 of the shower water. The output of the node 7 is communicated through pipe 17 with the alkaline compartment 1 and through the pipe 18 to the inlet of the node 6. The entrance of the node 8 is connected through pipe 19 with the perforated attachment 3 and through the pipe 20 to the output of node 9. The output of node 9 is also connected to the dresser 4 through conduit 21-, and the inlet of assembly 8 — with the outlet of assembly 10 through conduit 22. The exit of assembly 8 communicates through conduit 23 with washing compartment 2. Pipeline 24 serves to supply fresh alkali to alkaline compartment 1 to compensate for its irretrievable losses. Transporter 25 is designed for you

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leading the solid phase from unit 6, conveyor 26 to remove the sludge from unit 7, conveyor 27 to remove the sludge from unit 8 and conveyor 28 to remove the solid phase from unit 9.

The installation works as follows.

OTpa6otaHHbtfi alkaline solution from alkaline compartment 1 enters through conduit 11 to unit 5, where it is subjected to reagent processing in any known way that ensures the transfer of soluble silicates into poorly soluble ones, and then via conduit 12 is fed to unit 6, where solid phase is separated from it. The regenerated alkaline solution through conduit 13 returns to alkaline compartment 1.

Wash water from the washing compartment 2 is supplied via conduit 15 to unit 7, from which, after separation of the sludge, is supplied via conduit 17 to compartment 1 of alkalinity. The water of the shower from the attachment 3 is supplied via conduit 19 to unit 8, from where, after separation of the sludge, a part of their volume is supplied to washing section 2. The remaining part of the volume of the sprinkling water from unit 8 is fed through conduit 16 to unit 7 for washing from alkali and silicates of sludge from wash water separated in this unit, and then through conduit 18 to unit 6 for washing alkaline solution of the alkaline solution after reagent treatment . From unit 6, part of the water from washing the solid phase and sludge, the alkali content of which exceeds the silicate content, is fed through conduit 13 to alkaline compartment 1, and the excess of this water enters through conduit 14 to unit 10, where it is treated with hydrochloric or sulfuric acid. Neutralized water is discharged from unit 10 through conduit 22 to unit 9, from where, after separation of the solid phase, part of it is supplied through conduit 20 to unit 8 and further countercurrent through conduit 16 to unit 7 and through conduit 18 to unit 6 for final washing of the sludge and solid phases from alkali and silicates, and part of the neutralized water through conduit 21 to the perfuming device 4. In order to avoid transfer by dissolved salts, part of the neutralized water

It is physically discharged into the sewer, and the remaining part is diluted with fresh tap water.

The alkalis washed from the alkaline state are solid phase and pshamy are extracted — by means of conveyors 25-28 and nodes 6-9, respectively, and are placed in storage areas or used as fillers in the production of building materials.

The use of the proposed plant for leaching ceramics residues and washing castings reduces the consumption of alkali by t5%, reduces the cost of neutralizing reagents and reduces the consumption of water withdrawn from the water supply network.

Claims (1)

Invention Formula Installation for imparting ceramics residues and washing the castings, containing a rotating cylindrical drum with an alkali compartment, a washing compartment and a perforated grout equipped with a perfusing fixture, a regeneration unit Compiled by V. Bel. Editor E. Sligan Tehred N. Tlushchenko Proofreader V. But ha Order 2559/12 Circulation 740 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 five 0 five 7 4 alkaline solution by its reagent treatment, which is connected with the inlet with the alkali compartment, and with the output with the inlet of the solid phase separation unit of the alkaline solution after the reagent treatment, which, in order to reduce the specific consumption of alkali and washing water, it additionally is equipped with a wash-off sludge separation unit communicating with an inlet with a washing compartment, and an outlet with an alkaline compartment, with a separation unit for washing water, communicating with an entrance with a perforated attachment, and an outlet with a washing compartment, and neutralization of water, the output of which is communicated with the inlet of the solid phase separation unit of neutralized water, the latter being communicated with the outlet to the douche device and with the input of the washwater slurry separation unit, the output of which is communicated with the input of the alkaline separation unit of the alkaline solution output with input neutralization node.