SU950801A1 - Method for cleaning castings from residues of moulding sand or ceramic mix - Google Patents

Method for cleaning castings from residues of moulding sand or ceramic mix Download PDF

Info

Publication number
SU950801A1
SU950801A1 SU803213935A SU3213935A SU950801A1 SU 950801 A1 SU950801 A1 SU 950801A1 SU 803213935 A SU803213935 A SU 803213935A SU 3213935 A SU3213935 A SU 3213935A SU 950801 A1 SU950801 A1 SU 950801A1
Authority
SU
USSR - Soviet Union
Prior art keywords
castings
melt
residues
cleaning
moulding sand
Prior art date
Application number
SU803213935A
Other languages
Russian (ru)
Inventor
Юрий Владимирович Польгуев
Владислав Константинович Доценко
Олег Константинович Севрук
Владимир Алексеевич Марченко
Римма Алексеевна Углянская
Original Assignee
Алтайский научно-исследовательский институт технологии машиностроения
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 Алтайский научно-исследовательский институт технологии машиностроения filed Critical Алтайский научно-исследовательский институт технологии машиностроения
Priority to SU803213935A priority Critical patent/SU950801A1/en
Application granted granted Critical
Publication of SU950801A1 publication Critical patent/SU950801A1/en

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Processing Of Solid Wastes (AREA)

Description

(54) СПОСОБ очистки ОТЛИВОК ОТ ОСТАТКОВ ФОРМОВОЧНОЙ или КЕРАМИЧЕСКОЙ (54) METHOD FOR CLEANING CASTINGS FROM FORMING OR CERAMIC RESIDUES

1one

Изобретение относитс  к литейному производству, в частности к расплавам дл  очистки отливок, полученных в разовых песчаноглинистых формах или в керамических формах по выплавл емым модул .м.The invention relates to foundry, in particular, to melts for cleaning castings obtained in single sand-clay molds or in ceramic molds based on melted modules.

Известен способ очистки отливок от остатков керамики, включающий обработку их в расплаве кальцинированной соды при температуре выше 900°С. О.хлаждение отливок согласно известно.му способу производ т на воздухе, тем самым совмеща  процесс очистки отливок с их нормализацией 1.A known method of cleaning castings from the remnants of ceramics, including their processing in the melt of soda ash at a temperature above 900 ° C. A. The cooling of castings according to a known method is carried out in air, thereby combining the process of cleaning castings with their normalization 1.

Однако охлаждение отливок на воздухе приводит к окислению и обезуглероживанию их поверхности.However, the cooling of castings in air leads to the oxidation and decarburization of their surface.

Известен также способ, включающий обработку отливок в расплаве кальцинированной соды, изотермическое охлаждение в расплаве солей на основе хлористого натри  и соды и промывку отливок в воде 2.There is also known a method involving the processing of castings in a melt of soda ash, isothermal cooling in a melt of salts based on sodium chloride and soda, and washing the castings in water 2.

Такой способ позвол ет устранить окисление поберхности, однако ввиду высокой химической активности карбонатных расплавов при температуре выще 900°С и выдержке 20-30 .минут, не позвол ет устранить обезуглероживание поверхности.This method eliminates the oxidation of the surface, however, due to the high chemical activity of carbonate melts at a temperature of more than 900 ° C and a shutter speed of 20-30 minutes, does not allow to eliminate surface decarburization.

Целью изобретени   вл етс  степени обезуглероживани  поверхности отливок.The purpose of the invention is the degree of decarburization of the surface of the castings.

Эта цель достигаетс  тем, что в способе очистки отливок, включающем обработку отливок в расплаве кальцинированной соды, изотермическое охлаждение в расплаве солей на основе хлористого натри  или кали , и соды, и последующую промывку отливок в воде, перед проведением операции обра )Q ботки отливок в расплаве кальцинированной соды их нагревают и выдерживают в расплаве солей с температурой 750-850°С, не агрессивном по отношению к металлу отливки .This goal is achieved by the fact that in the method of cleaning castings, including the processing of castings in a melt of soda ash, isothermal cooling in a melt of salts based on sodium chloride or potassium, and soda, and the subsequent washing of castings in water, before performing the operation Q) molten soda ash they are heated and kept in the molten salt with a temperature of 750-850 ° C, not aggressive with respect to the metal casting.

Способ осуществл ют следующим обра5 зом.The method is carried out as follows.

Отливки погружают в расплаве неагрессивных по отношению к металлу расплаве солей, например системы КС1-NaF, и выдерживают в нем при темдературе 750-850°СCastings are immersed in the molten salt non-aggressive with respect to the metal melt, for example, the KC1-NaF system, and kept there at a temperature of 750-850 ° C

2Q в течение -15-30 мин. тем отливки перенос т в карбонатный расплав на основе кальцинированной соды (ЫагСОз), выдерживают в нем при температуре 920-930°С в течение 10-12 мин, после чего провод т изотермическое о.члаждение отливок в распла2Q for -15-30 min. the castings are transferred to a carbonate melt based on soda ash (LFCO3), kept in it at a temperature of 920–930 ° C for 10–12 min, after which the isothermal cooling of the castings is carried out

Claims (1)

и Формула изобретения and claims Способ очистки отливок от остатков формовочной или керамической смеси, включающий обработку отливок в расплаве кальци35 нированной соды, изотермическое охлаждение в расплаве солей на основе хлористого натрия или калия и соды и последующую промывку отливок в воде, отличающийся тем, что, с целью снижения степени обеуглероживания поверхности отливок, перед обработ40 кой отливок в расплаве кальцинированной соды их нагревают и выдерживают в расплаве солей с температурой 750—850°С, не агрессивном по отношению к металлу отливки.A method of cleaning castings from the remains of a molding or ceramic mixture, including processing castings in a melt of calcium 35 soda ash, isothermal cooling in a molten salt based on sodium chloride or potassium chloride and soda, and subsequent washing of the castings in water, characterized in that, in order to reduce the degree of carbonization surfaces of castings, before processing 40 castings in a soda ash melt, they are heated and kept in a salt melt with a temperature of 750–850 ° C, which is not aggressive with respect to the casting metal.
SU803213935A 1980-10-22 1980-10-22 Method for cleaning castings from residues of moulding sand or ceramic mix SU950801A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU803213935A SU950801A1 (en) 1980-10-22 1980-10-22 Method for cleaning castings from residues of moulding sand or ceramic mix

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU803213935A SU950801A1 (en) 1980-10-22 1980-10-22 Method for cleaning castings from residues of moulding sand or ceramic mix

Publications (1)

Publication Number Publication Date
SU950801A1 true SU950801A1 (en) 1982-08-15

Family

ID=20930441

Family Applications (1)

Application Number Title Priority Date Filing Date
SU803213935A SU950801A1 (en) 1980-10-22 1980-10-22 Method for cleaning castings from residues of moulding sand or ceramic mix

Country Status (1)

Country Link
SU (1) SU950801A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699290A (en) * 2012-06-13 2012-10-03 浙江灿根机械制造有限公司 Copper pipe continuous casting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699290A (en) * 2012-06-13 2012-10-03 浙江灿根机械制造有限公司 Copper pipe continuous casting device
CN102699290B (en) * 2012-06-13 2014-09-17 浙江灿根机械制造有限公司 Copper pipe continuous casting device

Similar Documents

Publication Publication Date Title
EP0899038B1 (en) Process for lost foam casting of aluminium with coated pattern
JP2000239757A (en) Method and flux for refining molten aluminum alloy
SU950801A1 (en) Method for cleaning castings from residues of moulding sand or ceramic mix
JPS62144846A (en) Casting mold for high melting point metal and its production
JP3014068B2 (en) Heating and cooling method for molten metal
SU997975A1 (en) Method of cleaning castings from ceramics
RU2158655C2 (en) Method of removal of corundum and quartz- containing ceramic cores from internal hollows of castings
SU1171565A1 (en) Method of chemical cleaning of castings and line for effecting same
SU908482A1 (en) Method of working casting moulds for producing casting from chemically active metals
SU462411A1 (en) Method of refining metal
SU876790A1 (en) Method of cleaning ingots from ceramics
SU358433A1 (en)
SU501835A1 (en) A METHOD FOR REMOVING A MODEL COMPOSITION OF A CERAMIC SHAPED FORM IN THE MANUFACTURE OF CASTING ON A MOLDED MODELS1 improving the quality of ceramic shells and sanitary-hygienic working conditions. There is a well-known method of melting a model composition from ceramic shells in liquid Yu media, according to which Which medium for melting, which is simultaneously a heat carrier, is known a composition for removing model material 1 [from ceramic forms, including a mixture of glycols and 15 carbitol. A well-known method is that models are made of a low-melting model material (for example, composition P-3) and collect them in blocks. On the assembled model blocks, apply the required number of layers of a refractory coating based on a binder hydrolyzed solution of ethyl silicate and with them in an exothermic ammonia atmosphere. After the act !! All the layers of the block — o are transported by the condom to the bath for the smelting of models. when heated to a temperature above the melt of the moling composition with a liquid, for example, a mixture of glycols and carbitol, the blocks in this mixture are kept for the time necessary for the complete removal of the models from the cavity, and then the forms are transported to the next operation. The disadvantage of this method is the following: —When using shell forms of glass glass or a hydrolyzed solution of ethyl silicate as a binder, around the shell form, immersed in a model bath, forms with an area with high pH (pH). If the models are melted in high-boiling organic liquids, such as mixtures of glycols and carb'Itol, then at high pH the medium will produce slow-burning tar-like products, which accumulate the oxidation products of the bath material, as well as sand particles, etc. Getting into the internal cavity of the mold, these products cause incomplete burning of combustible during annealing, resulting in the rejection of castings due to insufficient heat, gas shells and clogs. At the time of removing the ceramic shells from the installation, they have a high temperature y (about SO' ^ C) and reduced proch-
SU1227714A1 (en) Method of removing ceramics from aluminium alloys
SU1204320A1 (en) Composition for reinforcing ceramic moulds
SU1281334A1 (en) Sand for making cast ceramic moulds and cores by permanent pattern
JPS5841135B2 (en) Imonozu Nano Saiseihouhou
SU541571A1 (en) Way to remove models
SU789636A1 (en) Salt melt for cleaning ingots from quartz ceramics residue
SU801978A1 (en) Method of producing casting from fe-alloys
SU1135529A1 (en) Mortar for strengthening investment moulds
SU603483A1 (en) Method of making ceramic casting moulds with use of removable patterns
JPS63256239A (en) Method for disintegrating ceramic shell mold
SU478678A1 (en) Method of making permanent casting molds
SU969419A1 (en) Method for preparing metal molds for pouring metal