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WO2008121026A1 - Procédé de fabrication d'un liant à base de gypse hyrophobe et hautement résistant respectueux de l'environnement - Google Patents

Procédé de fabrication d'un liant à base de gypse hyrophobe et hautement résistant respectueux de l'environnement Download PDF

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Publication number
WO2008121026A1
WO2008121026A1 PCT/RU2008/000199 RU2008000199W WO2008121026A1 WO 2008121026 A1 WO2008121026 A1 WO 2008121026A1 RU 2008000199 W RU2008000199 W RU 2008000199W WO 2008121026 A1 WO2008121026 A1 WO 2008121026A1
Authority
WO
WIPO (PCT)
Prior art keywords
phosphogypsum
binder
environmentally friendly
gypsum
suspension
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/RU2008/000199
Other languages
English (en)
Russian (ru)
Inventor
Anatoliy Vasiljevich Dolgorev
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zakrytoe Akcionernoe Obshestvo 'techno-Tm'
Original Assignee
Zakrytoe Akcionernoe Obshestvo 'techno-Tm'
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 Zakrytoe Akcionernoe Obshestvo 'techno-Tm' filed Critical Zakrytoe Akcionernoe Obshestvo 'techno-Tm'
Publication of WO2008121026A1 publication Critical patent/WO2008121026A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials

Definitions

  • phosphogypsum refers to large-capacity by-products of the production of phosphoric acid by the sulfuric acid method and contains valuable chemicals, in particular, such as calcium, rare earth elements.
  • valuable chemicals in particular, such as calcium, rare earth elements.
  • a known method of processing gypsum-containing waste for example phosphogypsum, for use in the building materials industry by neutralizing calcium hydroxide, followed by filtration pressing and removing the filtrate (RU 2215707, 2003), as well as by repulping phosphogypsum in water, further mixing said waste with a neutralizing lime additive , followed by heat treatment and pressing by rolling under a pressure of 300-2000 MPa to obtain plates 4-10 mm thick (SU 1839167, 1987).
  • a binder is obtained with the following characteristics: water-gypsum ratio with a normal test consistency of 0.95, tensile strength of wet standard beams in bending after 2 hours 1, 4 MPa, in the air-dry state 2.7 MPa, compressive strength of standard beams through 2 hours 3.2 MPa in the air-dry state of 4.3 MPa.
  • dehydrated phosphogypsum contains fluorine up to 0.3%, i.e. it also does not solve the problem of defluorination of phosphogypsum.
  • the proposed method allows to increase the degree of defluorination of phosphogypsum up to 98%, completely separating fluorine into the gas phase in the form of SiF 4 , while the final product contains fluorine not more than 0.02%.
  • SUBSTITUTE SHEET moisture 0.5-10% in the presence of binders, which are taken as carbamide, ammonium nitrate, calcium nitrate, polyethylene oxide or distillation liquid, introduced in an amount of 0.01-6 wt.% and 55-98% sulfuric acid introduced in an amount of 0.5-15 weight. h per 100 weight. h of dry phosphogypsum, followed by heat treatment of the granules at 170-700 0 C. The known method allows to obtain granules of phosphogypsum with a strength of 9.7-24.2 kg / cm 2 and a fluorine content of 0.01-0.07%, suitable for thermal dissociation .
  • binders which are taken as carbamide, ammonium nitrate, calcium nitrate, polyethylene oxide or distillation liquid, introduced in an amount of 0.01-6 wt.% and 55-98% sulfuric acid introduced in an amount of 0.5-15 weight. h per 100 weight. h of dry phosphogypsum, followed by heat treatment
  • the process is carried out mainly with a ratio between sulfuric acid and carbonate-containing additive 1: 0.3-2.0.
  • lime calcium hydroxide

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

L'invention concerne l'industrie de matériaux de construction et notamment le traitement de déchets contenant du gypse et peut s'utiliser pour fabriquer des liants à base de gypse respectueux de l'environnement, notamment à base de phosphogypse. Le procédé de fabrication d'un liant à base de phosphogypse, hydrophobe et respectueux de l'environnement, consiste à traiter le phosphogypse avec de l'acide sulfurique avec une concentration de 62,5-95,0 % chauffé à 95-105°C puis à le laisser reposer à cette température jusqu'à ce que sa teneur en fluorures ne dépasse pas les 0,05 % en masse; à effectuer une neutralisation en deux stades par l'introduction dans la suspension d'un additif carbonaté d'un hydroxyde de calcium en poudre, puis par le séchage jusqu'à l'élimination totale de l'eau non liée et l'autoclavage permettant d'obtenir un liant à base de gypse hautement résistant et le recuit permettant d'obtenir un liant anhydre. Avant la neutralisation, on évacue par soufflage le fluor gazeux avec de l'air comprimer et on évacue les fluorures; au premier stade de neutralisation, on effectue l'évacuation du dioxyde de carbone. L'invention permet d'obtenir un liant respectueux de l'environnement avec une résistance à l'eau et une résistance mécanique plus élevées.
PCT/RU2008/000199 2007-04-02 2008-04-02 Procédé de fabrication d'un liant à base de gypse hyrophobe et hautement résistant respectueux de l'environnement Ceased WO2008121026A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2007111997 2007-04-02
RU2007111997/03A RU2333171C1 (ru) 2007-04-02 2007-04-02 Способ получения водостойкого и экологически чистого гипсового вяжущего

Publications (1)

Publication Number Publication Date
WO2008121026A1 true WO2008121026A1 (fr) 2008-10-09

Family

ID=39808515

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2008/000199 Ceased WO2008121026A1 (fr) 2007-04-02 2008-04-02 Procédé de fabrication d'un liant à base de gypse hyrophobe et hautement résistant respectueux de l'environnement

Country Status (2)

Country Link
RU (1) RU2333171C1 (fr)
WO (1) WO2008121026A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5939B (lt) 2011-07-15 2013-05-27 Vilniaus Gedimino technikos universitetas Konstrukcinis termoizoliacinis kompozitas iš vietinių technogeninių atliekų
CN107487995A (zh) * 2016-06-12 2017-12-19 李国刚 一种利用磷石膏制备α型高强石膏的方法
CN113461396A (zh) * 2020-11-26 2021-10-01 湖南中天青鼎工程科技股份有限公司 一种包含磷石膏和铅锌尾矿的抹灰砂浆干粉及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162170A (en) * 1977-06-29 1979-07-24 Vish Chimiko-Technologicheski Institute Method of obtaining granulated and defluorated phosphogypsum
SU1224287A1 (ru) * 1982-12-27 1986-04-15 Литовский Научно-Исследовательский Институт Строительства И Архитектуры Способ получени @ -полугидрата сульфата кальци
SU1723066A1 (ru) * 1990-07-26 1992-03-30 Сумский филиал Харьковского политехнического института им.В.И.Ленина Способ получени гипсового в жущего из фосфогипса
JPH1045446A (ja) * 1996-07-29 1998-02-17 Chichibu Onoda Cement Corp 二型無水石膏の製造方法及びセメント

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2215707C1 (ru) * 2002-11-19 2003-11-10 Гордеев Игорь Владимирович Способ утилизации фосфогипса

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162170A (en) * 1977-06-29 1979-07-24 Vish Chimiko-Technologicheski Institute Method of obtaining granulated and defluorated phosphogypsum
SU1224287A1 (ru) * 1982-12-27 1986-04-15 Литовский Научно-Исследовательский Институт Строительства И Архитектуры Способ получени @ -полугидрата сульфата кальци
SU1723066A1 (ru) * 1990-07-26 1992-03-30 Сумский филиал Харьковского политехнического института им.В.И.Ленина Способ получени гипсового в жущего из фосфогипса
JPH1045446A (ja) * 1996-07-29 1998-02-17 Chichibu Onoda Cement Corp 二型無水石膏の製造方法及びセメント

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5939B (lt) 2011-07-15 2013-05-27 Vilniaus Gedimino technikos universitetas Konstrukcinis termoizoliacinis kompozitas iš vietinių technogeninių atliekų
CN107487995A (zh) * 2016-06-12 2017-12-19 李国刚 一种利用磷石膏制备α型高强石膏的方法
CN107487995B (zh) * 2016-06-12 2020-10-02 湖北远固新型建材科技股份有限公司 一种利用磷石膏制备α型高强石膏的方法
CN113461396A (zh) * 2020-11-26 2021-10-01 湖南中天青鼎工程科技股份有限公司 一种包含磷石膏和铅锌尾矿的抹灰砂浆干粉及其制备方法

Also Published As

Publication number Publication date
RU2333171C1 (ru) 2008-09-10

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