| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Recovery method of plaster | JP2006259806 | 2006-09-25 | JP4415332B2 | 2010-02-17 | 繁 福島; 浩幸 藤澤; 道人 角森 |
| 42 | INSULATING MINERAL FOAM | EP13714312.9 | 2013-04-05 | EP2834206A1 | 2015-02-11 | BERNARDI, Sébastien; JAVIERRE, Isabelle; DUCHAND, Sylvain; SABIO, Serge; ROY, Cédric |
| A process for producing a mineral foam includes (i) separately preparing one or more slurries of cement, and an aqueous foam for which a D50 of bubbles is less than or equal to 400 μm; (ii) homogenizing the one or more slurries of cement with the aqueous foam to obtain a slurry of foamed cement; (iii) casting the slurry of foamed cement and leaving the cast slurry of foamed cement to set. | ||||||
| 43 | ACTIVATED CARBON AS MERCURY RELEASE CONTROL AGENT IN GYPSUM CALCINATION | EP08846328.6 | 2008-10-31 | EP2217543A1 | 2010-08-18 | LUAN, Wenqi |
| A method for providing effective mercury release control during gypsum calcination is disclosed. The method comprises providing a reactor and gypsum containing mercury; providing a mercury sorbent, such as activated carbon and/or derivatives thereof in the reactor; and calcining the gypsum in the reactor to form stucco. The mercury contaminant present in the gypsum is sorbcd by the mercury sorbent during the calcination process. The mercury content of the stucco is substantially similar in amount to the mercury content of the uncalcincd gypsum. | ||||||
| 44 | Process for physico-chemical adaptation of chemical gypsum or phosphogypsum for use in cement formulations and other construction materials | EP07008619.4 | 2007-04-27 | EP1876152A2 | 2008-01-09 | Andara Giannotti, Miriam Elena Urbanizacion Ruis Pineda; Rus Romero, Jose R.; Torres, Carlos Di Pasquale; Ascanio Lopez, Morvin Urbanizacion Valles de Chara; Oropeza, Jose; Suarez, Juan Carlos |
The present invention relates to the application of a novel process for the chemical and physical adaptation of chemical gypsum or phosphogypsum coming from the production of phosphoric acid and its use as a setting retarding agent in Portland type cements or in the preparation of other materials for construction. The adaptation is based on reactions in the solid state or in the presence of small amounts of water between the phosphogypsum and the agglutinating-neutralising agents, primarily by the application of oxy- and hydroxy-compounds, without rejecting the respective carbonates, of magnesium, aluminium and mainly calcium carbonate, along with mixtures thereof and later preparation of self-hardening pellets which facilitate its transport and handling. The technological process associated with the invention notably simplifies the number and type of unitary operations, and the preparation of pellets of mixtures of phosphogypsum, along with a reduction in energy costs due to operating at low temperatures (150 °C) for short times (1-2 hours) and a reduction in the quantities of neutralising agents, and it also minimise the volume of water required in the process.
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| 45 | GYPSUM STABILISATION METHOD | EP08718477 | 2008-03-07 | EP2133310A4 | 2015-05-20 | ÁLVAREZ AYUSO ESTHER; QUEROL CARCELLER JAVIER; BALLESTEROS APARICIO JUAN CARLOS; JIMÉNEZ ALONSO ANTONIO; TOMÁS TELLO ALFEDRO |
| 46 | GYPSUM STABILISATION METHOD | EP08718477.6 | 2008-03-07 | EP2133310A1 | 2009-12-16 | ÁLVAREZ AYUSO, Esther; QUEROL CARCELLER, Javier; BALLESTEROS APARICIO, Juan Carlos; JIMÉNEZ ALONSO, Antonio; TOMÁS TELLO, Alfedro |
The present invention relates to a process for reducing or eliminating the soluble content of pollutants in gypsum or in compounds containing gypsum, wherein the gypsum or gypsum-containing compound is mixed with additives that contain or are capable of generating aluminium oxide. More specifically, the gypsum originates from gas desulphurisation and the pollutant is fluoride. |
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| 47 | Process for physico-chemical adaptation of chemical gypsum or phosphogypsum for use in cement formulations and other construction materials | EP07008619.4 | 2007-04-27 | EP1876152A3 | 2008-10-01 | Andara Giannotti, Miriam Elena Urbanizacion Ruis Pineda; Rus Romero, Jose R.; Torres, Carlos Di Pasquale; Ascanio Lopez, Morvin Urbanizacion Valles de Chara; Oropeza, Jose; Suarez, Juan Carlos |
The present invention relates to the application of a novel process for the chemical and physical adaptation of chemical gypsum or phosphogypsum coming from the production of phosphoric acid and its use as a setting retarding agent in Portland type cements or in the preparation of other materials for construction. The adaptation is based on reactions in the solid state or in the presence of small amounts of water between the phosphogypsum and the agglutinating-neutralising agents, primarily by the application of oxy- and hydroxy-compounds, without rejecting the respective carbonates, of magnesium, aluminium and mainly calcium carbonate, along with mixtures thereof and later preparation of self-hardening pellets which facilitate its transport and handling. The technological process associated with the invention notably simplifies the number and type of unitary operations, and the preparation of pellets of mixtures of phosphogypsum, along with a reduction in energy costs due to operating at low temperatures (150 °C) for short times (1-2 hours) and a reduction in the quantities of neutralising agents, and it also minimise the volume of water required in the process.
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| 48 | PROCESS FOR PRODUCING HIGHLY REACTIVE LIME IN A FURNACE | EP98935984.9 | 1998-07-21 | EP1024883A1 | 2000-08-09 | LAVELY, Lloyd, L., Jr. |
| A limestone furnace calcination process involves injecting finely divided limestone particles (33) into a zone (36) in a furnace (1) at which the temperature of the flue gas stream (10), as it passes through zone (36), is above the minimum calcination temperature (typically, from 1,365 °F to 1,430 °F) and below the effective quicklime utilization/sulfation temperature (typically, from 1,600 °F to 1,800 °F). Reactions between the resultant lime particles and sulfur dioxide to form calcium sulfate are minimized. Sintering of the lime and complex calcium compound formation are also minimized. The resultant highly reactive lime particles may be used in flue gas desulfurization processes. | ||||||
| 49 | INSULATING MINERAL FOAM | EP13714312.9 | 2013-04-05 | EP2834206B1 | 2017-02-08 | BERNARDI, Sébastien; JAVIERRE, Isabelle; DUCHAND, Sylvain; SABIO, Serge; ROY, Cédric |
| A process for producing a mineral foam includes (i) separately preparing one or more slurries of cement, and an aqueous foam for which a D50 of bubbles is less than or equal to 400 μm; (ii) homogenizing the one or more slurries of cement with the aqueous foam to obtain a slurry of foamed cement; (iii) casting the slurry of foamed cement and leaving the cast slurry of foamed cement to set. | ||||||
| 50 | SURFACTANT-COATED HEMIHYDRATE GYPSUM AND METHOD FOR PRODUCING SAME | EP12830452 | 2012-08-21 | EP2730549A4 | 2015-03-18 | HIRANAKA SHINGO; KATO HIROYOSHI |
| 51 | SURFACTANT-COATED HEMIHYDRATE GYPSUM AND METHOD FOR PRODUCING SAME | EP12830452.4 | 2012-08-21 | EP2730549A1 | 2014-05-14 | HIRANAKA Shingo; KATO Hiroyoshi |
Surfactant-coated hemihydrate gypsum which is coated with 0.01 to 1 part by weight of a surfactant based on 100 parts by weight of hemihydrate gypsum, wherein the residual rate of the surfactant when the surfactant-coated hemihydrate gypsum is heated up to 300°C is not less than 40 wt% of the amount of the surfactant before heating. |
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| 52 | ACTIVATED CARBON AS MERCURY RELEASE CONTROL AGENT IN GYPSUM CALCINATION | EP08846328 | 2008-10-31 | EP2217543A4 | 2011-10-05 | LUAN WENQI |
| 53 | PROCESS FOR PRODUCING HIGHLY REACTIVE LIME IN A FURNACE | EP98935984.9 | 1998-07-21 | EP1024883B1 | 2005-01-12 | LAVELY, Lloyd, L., Jr. |
| 54 | PROCESS FOR PRODUCING HIGHLY REACTIVE LIME IN A FURNACE | EP98935984 | 1998-07-21 | EP1024883A4 | 2000-11-08 | LAVELY LLOYD L JR |
| 55 | 폐석고의 재자원화를 위한 정제 처리방법 | KR1020030032603 | 2003-05-22 | KR1020040100307A | 2004-12-02 | 배광현; 채영배; 손정수 |
| PURPOSE: Provided is a method for recycling waste gypsum by removing impurities from waste gypsum effectively through ultrasonification and gravity separation. CONSTITUTION: The purification method of waste gypsum comprises the steps of: (i) milling waste gypsum, generated from desulfurization and production of H3PO4, HF, F, etc., in attrition mill, wherein the waste gypsum contains 70wt.% of gypsum and 30wt.% of impurities such as magnetite, galena, pyrite and quartz; (ii) cyclone separating gypsum particles(about 100micrometer) to separate magnetite, galena, pyrite; (iii) passing separated gypsum through spiral separator to remove remaining magnetite and pyrite, which results in good quality gypsum of 95% purity for use as gypsum board. The purity of resultant gypsum is further improved by applying ultrasonic waves(40-50kHz) to gypsum obtained from the step (iii) and removing heavy metal particles from gypsum by multi-gravity separator. | ||||||
| 56 | 시멘트용 인산정제석고의 제조 방법 | KR1020000054742 | 2000-09-18 | KR1020020021965A | 2002-03-23 | 한동운; 전종협; 정진악; 조남길 |
| PURPOSE: Provided is a manufacturing method of purified phospho-gypsum for cement by purifying phospho-gypsum, a by-product of phosphate processing, through neutralization and high pressure steaming processes. CONSTITUTION: The purified phospho-gypsum, Ca3(PO4)2, is obtained by adding an alkali material such as CaO, Ca(OH)2, cement, cement clinker powder or NaOH to phospho-gypsum, a by-product of phosphate processing, including impurities(e.g. soluble P2O5, insoluble CaH4(PO4)2·H2O, and soluble HF and H2SiF6), followed by steaming under high pressure(3-5kg/cm¬2) to decompose CaHPO42·2H2O in the interstice of crystal lattice into Ca3(PO4)2. | ||||||
| 57 | 비시멘트계 초속경 분말 조성물 | KR1020090112677 | 2009-11-20 | KR100963599B1 | 2010-06-16 | 김남호; 이선우 |
| PURPOSE: A non-cement ultra rapid hardening powder composition is provided to freely manufacture and deliver concrete by controlling curing time and to improve construction benefit. CONSTITUTION: A non-cement ultra rapid hardening powder composition contains 80-95 weight% of powder having 50-80% of calcium sulfoaluminate, 5-20 weight% of gypsum powder by mixing anhydrous gypsum and hemihydrates gypsum, and 15-35 weight% of polymer modifier of acrylemulsion ingredient based on 100 weight% of gypsum powder. The blain specific surface area of CSA-based clinker powder is 3,000-8,000cm^2/g. | ||||||
| 58 | 부생석고를 이용한 무수석고 제조방법 | KR1020020006886 | 2002-02-06 | KR1020030067075A | 2003-08-14 | 오수현; 강창호; 김남천 |
| PURPOSE: An economical production method of anhydrous gypsum is provided, which lowers cost remarkably and prevents pollution by using byproduct gypsum generated from industrial processes. CONSTITUTION: The anhydrous gypsum is produced by mixing 100wt.% of byproduct gypsum generated by industrial processes with 5-15wt.% of CaO or Ca(OH)2 and sintering the mixture at 200-1200deg.C by direct heating like furnace sintering or indirect heating like high temperature blasting. Also, various types of anhydrous gypsum such as anhydrous gypsum III, anhydrous gypsum II-S, anhydrous gypsum II-U, etc., are produced by controlling the sintering temperature. | ||||||
| 59 | 인산석고의 정제방법 | KR1020000061617 | 2000-10-19 | KR1020020031607A | 2002-05-03 | 배광현; 양정일; 김준수; 채영배; 최병인; 이길용 |
| PURPOSE: Provided is a method to purify and extract phosphate gypsum in a certain particle range(-65 to +200mesh) from phosphate gypsum, byproducts, generated from the phosphate fertilizer industry through a classification process using a rotation and a suction power of the air. CONSTITUTION: The purification method is as follows: classifying phosphate gypsum by natural dropping and suction power of air applied from outside, where the natural dropping leads impurities over the particle range(>=65 mesh) to gather in a lower part of a chamber, and the suction power of air leads gypsum products under the particle range(<=65mesh) to gather in a second chamber; repeating the classifying process until the particle size of purified gypsum ranges from -65 to +200mesh, where the fine particles less than 200mesh are gathered in a third chamber. | ||||||
