WO2016151514A3 - Method and plant of leaching ceramic residues of components made by lost-wax casting with recirculation of caustic soda - Google Patents

Method and plant of leaching ceramic residues of components made by lost-wax casting with recirculation of caustic soda Download PDF

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Publication number
WO2016151514A3
WO2016151514A3 PCT/IB2016/051654 IB2016051654W WO2016151514A3 WO 2016151514 A3 WO2016151514 A3 WO 2016151514A3 IB 2016051654 W IB2016051654 W IB 2016051654W WO 2016151514 A3 WO2016151514 A3 WO 2016151514A3
Authority
WO
WIPO (PCT)
Prior art keywords
caustic soda
solution
recirculation
lost
plant
Prior art date
Application number
PCT/IB2016/051654
Other languages
French (fr)
Other versions
WO2016151514A2 (en
Inventor
Michele FABIANO
Corrado NATALE
Original Assignee
Europea Microfusioni Aerospaziali S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Europea Microfusioni Aerospaziali S.P.A. filed Critical Europea Microfusioni Aerospaziali S.P.A.
Publication of WO2016151514A2 publication Critical patent/WO2016151514A2/en
Publication of WO2016151514A3 publication Critical patent/WO2016151514A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/002—Removing cores by leaching, washing or dissolving

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention concerns a method and a plant of leaching ceramic residues of components made by lost-wax casting, comprising a step of taking of an aqueous solution of caustic soda, at a concentration of 15-25% by weight, from a storage tank or processing tank (12), a step of loading of said solution in one or more leaching autoclaves (10), inside which the components to be treated have been previously positioned; permanence of the solution in the autoclaves (10) at a predetermined pressure and temperature for a predefined time; withdrawal from the autoclaves (10) of the solution of caustic soda, containing ceramic residue, characterised in that it additionally comprises a step of recirculation of caustic soda, comprising the following substeps: - decanting of the solution of spent caustic soda, to obtain, at the top, a phase of clarified solution of caustic soda and at the bottom a phase of solution of caustic soda muddied with ceramic residues; - withdrawing of the clarified solution of caustic soda; and - forwarding of the clarified solution of caustic soda to the storage tank or processing tank (12), together with a make up quantity of fresh aqueous solution of caustic soda.
PCT/IB2016/051654 2015-03-23 2016-03-23 Method and plant of leaching ceramic residues of components made by lost-wax casting with recirculation of caustic soda WO2016151514A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB20150634 2015-03-23
IT102015000009521 2015-03-23

Publications (2)

Publication Number Publication Date
WO2016151514A2 WO2016151514A2 (en) 2016-09-29
WO2016151514A3 true WO2016151514A3 (en) 2016-11-03

Family

ID=53539869

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/051654 WO2016151514A2 (en) 2015-03-23 2016-03-23 Method and plant of leaching ceramic residues of components made by lost-wax casting with recirculation of caustic soda

Country Status (1)

Country Link
WO (1) WO2016151514A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2667267C1 (en) * 2018-02-02 2018-09-18 Общество с ограниченной ответственностью "РусТурбоТехнологии" Technological complex for ultrasound hydro-thermal cleaning of cast turbine blades from ceramic material
RU2714976C1 (en) * 2019-10-10 2020-02-21 ООО "РусТурбоТехнологии" Power unit of process complex for cleaning castings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563711A (en) * 1968-07-18 1971-02-16 Trw Inc Process for removal of siliceous cores from castings
CA898486A (en) * 1972-04-25 E. Mccracken Robert Process for removal of siliceous cores from castings
EP1764170A1 (en) * 2005-09-13 2007-03-21 United Technologies Corporation Method for casting core removal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA898486A (en) * 1972-04-25 E. Mccracken Robert Process for removal of siliceous cores from castings
US3563711A (en) * 1968-07-18 1971-02-16 Trw Inc Process for removal of siliceous cores from castings
EP1764170A1 (en) * 2005-09-13 2007-03-21 United Technologies Corporation Method for casting core removal

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HOWARD PICKARD: "Core removal", 10 September 2013 (2013-09-10), XP055227450, Retrieved from the Internet <URL:https://web.archive.org/web/20130910080756/http://lbbctechnologies.com/content/Core_Removal_Presentation.ppt> [retrieved on 20151110] *
N.N.: "Caustic Soda Solution Handbook", 1 August 2010 (2010-08-01), XP055301070, Retrieved from the Internet <URL:http://brinechlor.com/wp-content/uploads/2015/06/Caustic-Soda-Handbook-Dow.pdf> [retrieved on 20160908] *
N.N.: "Decanter System - Tecnical informations", 22 October 2013 (2013-10-22), XP055227361, Retrieved from the Internet <URL:https://web.archive.org/web/20131022210615/http://www.decantersystem.com/en/about-us/tecnical-informations> [retrieved on 20151110] *

Also Published As

Publication number Publication date
WO2016151514A2 (en) 2016-09-29

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