| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | 磷石膏的硫酸改性方法 | CN200810056189.0 | 2008-01-15 | CN101486536A | 2009-07-22 | 詹骏 |
| 本发明涉及一种磷石膏的硫酸改性方法，通过将硫酸与磷石膏原料混合，在10－90℃的反应温度下反应0.5－24小时，然后对反应产物进行中和处理，得到改性后的磷石膏，使磷石膏中的共晶磷脱出，降低磷石膏总的磷含量；也可以根据不同的需要，选择合适的反应条件，获得磷含量不同的磷石膏，使其适用于不同的工业生产中。本发明还提供了上述方法制备的硫酸改性磷石膏以及其作为水泥原料或添加剂的用途。 | ||||||
| 22 | 磷石膏的改性方法及其应用 | CN200710056674.3 | 2007-01-31 | CN101234858A | 2008-08-06 | 王宝林 |
| 本发明提供一种磷石膏的改性方法，其包括将磷石膏除水、过筛；将电石渣除水、过筛；将分别经过除水、过筛的磷石膏和电石渣按照重量比为1∶0.15至0.25的比例在轮碾机中进行轮碾混合，然后堆放静置，使之聚沉，完成磷石膏的改性；改性的磷石膏能够代替天然石膏而用于生产水泥，使磷石膏和电石渣两种工业废弃物都得到再利用，而且能够同时降低水泥生产、磷化工生产以及海洋化工生产的成本，还能够综合治理环境，达到循环经济和环境友好的目标。 | ||||||
| 23 | 用于对煅烧的灰泥进行冷却及脱蒸汽的设备及方法 | CN200580023194.6 | 2005-05-19 | CN101119923A | 2008-02-06 | 迈克尔·L·博林德; 克里斯托弗·R·纳尔逊; 布鲁斯·琳恩·彼得森; 迈克尔·J·波特 |
| 本发明为一种用于对在生产石膏板或袋装熟石膏中所用的热的煅烧灰泥进行冷却及脱蒸汽的设备及方法。所述设备为一流化床灰泥冷却器并包括一冷却器外壳，所述冷却器外壳具有一具有一灰泥入口及一灰泥出口的压力通风系统。所述灰泥冷却器包括一位于所述压力通风系统中的旋转盘。所述旋转盘包括用于喷射流体的喷嘴，且附装至一自所述冷却器的侧面伸出的可旋转的轴，而且还包括一流化垫及搅拌器以有助于混合空气与所述灰泥粉末以确保流化、防止形成通道、及防止所述灰泥粉末积聚在各种组件上。所述空气还经由一定位于所述灰泥冷却器的顶部的空气出口迫出所述热的煅烧灰泥中的蒸汽，从而使所述灰泥脱蒸汽。所述灰泥流经所述压力通风系统并越过冷却盘管，从而在所述灰泥到达所述灰泥出口时冷却所述灰泥。 | ||||||
| 24 | 高强α－半水石膏的制备工艺 | CN01107002.1 | 2001-01-02 | CN1362382A | 2002-08-07 | 陆瑞珍; 刘晓霞; 周相玲; 曹丽娟; 曹孟逵; 曹仲逵; 曹光华 |
| 本发明属于硫酸钙水泥,具体涉及一种石膏脱水制取α－半水石膏的工艺。它不加任何化学助剂,不用专门干燥设备,由备料、高压蒸煮、粉碎和陈化四步工序组成。用本发明工艺制备的α－半水石膏强度高,吸水率高,其质量超过国家GB1639－92标准和德国克脑夫集团公司的实物质量指标;本发明工艺的方法简便,设备投资少,能耗低,综合生产成本低,不仅本身无污染,而且还可将治污副产品排烟脱硫石膏转化为高附加值的高强石膏,具有显著的经济效益和环境效益。 | ||||||
| 25 | Process for continuous modification of dihydrate gypsum and modified dihydrate gypsum obtained by the process | US13962601 | 2013-08-08 | US09458025B2 | 2016-10-04 | Itaru Yokoyama; Kouji Katsumoto; Yasuo Kawamura |
| A process for the continuous modification of dihydrate gypsum includes calcining dihydrate gypsum into hemihydrate gypsum and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of different crystalline form. The aqueous slurry in a recrystallization reaction tank is maintained at a constant temperature under stirring, and a feed rate of the hemihydrate gypsum to the recrystallization reaction tank and a discharge rate of the recrystallized dihydrate gypsum are controlled to substantially equal. Dihydrate gypsum as a starting raw material can be converted into high-purity, modified dihydrate gypsum of large crystals by recrystallizing the starting dihydrate gypsum after it is once calcined into hemihydrate gypsum. | ||||||
| 26 | Method and system for the production of hard plaster | US13063719 | 2009-09-11 | US09340455B2 | 2016-05-17 | Volker Goecke; Tobias Gehle |
| A method for the production of hard plaster, a calcining plant, and a retrofit reactor for calcining plants. The method includes feeding plaster material, predominantly including beta-hemihydrate plaster, to a postreactor. The temperature is set to at least a calcining temperature of 95° C. during this step. The plaster material is retreated in the postreactor to form hard plaster, the beta-hemihydrate plaster being converted directly into alpha-hemihydrate plaster at a temperature above 95° C. The hard plaster can then be discharged out of the postreactor and cooled. Conversion can be carried out in the postreactor during continuous operation, and conversion of the beta-hemihydrate plaster can occur with a dwell time in the postreactor of less than 30 minutes. Steam can be externally supplied to the postreactor and the temperature and pressure in the postreactor can be regulated so that the temperature is at least 95° C. and an over pressure prevails. | ||||||
| 27 | METHOD AND SYSTEM FOR THE PRODUCTION OF HARD PLASTER | US13063719 | 2009-09-11 | US20110168061A1 | 2011-07-14 | Volker Goecke; Tabias Gehle |
| The invention relates to a method for the production of hard plaster made from calcined beta hemihydrate plaster, comprising adding of plaster material mainly consisting of beta hemihydrate plaster to a post reactor (3), after-treating in the post reactor (3) for forming hard plaster, wherein the beta hemihydrate plaster is directly converted into alpha hemihydrate plaster at a temperature above the calcining temperature of 95 degrees Celsius, removing the hard plaster from the post reactor (3), and cooling down. During the adding of the plaster material to the post reactor (3) the temperature is adjusted to at least the calcining temperature, the conversion is carried out in the post reactor (3) at a dwell time of less than 30 minutes while externally adding water vapor, and the temperature and the pressure in the post reactor (3) are regulated such that the temperature is at least 95 degrees Celsius and an overpressure is present. | ||||||
| 28 | PROCESS FOR CONTINUOUS MODIFICATION OF DIHYDRATE GYPSUM AND MODIFIED DIHYDRATE GYPSUM OBTAINED BY THE PROCESS | US13055891 | 2009-07-31 | US20110135930A1 | 2011-06-09 | Itaru Yokoyama; Kouji Katsumoto; Yasuo Kawamura |
| Disclosed is a process for the continuous modification of dihydrate gypsum. The process includes a hemihydration step of calcining the dihydrate gypsum as a raw material into hemihydrate gypsum and a recrystallization step of hydrating and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of a crystalline form different from the dihydrate gypsum as the raw material. In the recrystallization step, the aqueous slurry in a recrystallization reaction tank is maintained at a constant temperature under stirring such that the aqueous slurry becomes uniform, and a feed rate of the hemihydrate gypsum to the recrystallization reaction tank and a discharge rate of the recrystallized and modified dihydrate gypsum from the recrystallization reaction tank are controlled such that the feed rate and the discharge rate become substantially equal to each other, whereby the feeding of the hemihydrate gypsum and the discharging of the recrystallized and modified dihydrate gypsum are conducted continuously or intermittently. According to the process, dihydrate gypsum as a starting raw material can be converted into high-purity, modified dihydrate gypsum of large crystals by recrystallizing the starting dihydrate gypsum after it is once calcined into hemihydrate gypsum although such modified dihydrate gypsum is not available in general. | ||||||
| 29 | Calcium sulfate hemihydrate treatment process | US11957667 | 2007-12-17 | US07824490B2 | 2010-11-02 | Robert Byron Bruce; Mark Richard Flumiani; Charles E. Blow |
| A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure. | ||||||
| 30 | METHOD FOR STABILISING SOLUBLE METASTABLE SOLUBLE ANHYDRITE III, METHOD FOR PREPARING STABILISED SOLUBLE ANHYDRITE III HYDRAULIC BINDER, THE OBTAINED HYDRAULIC BINDER, USE OF THIS BINDER AND INDUSTRIAL FACILITY FOR CARRYING OUT SUCH A METHOD | US12095777 | 2006-11-10 | US20090293772A1 | 2009-12-03 | Edouard Dumoulin; Crisanto Palacios |
| The invention relates to a method for stabilising a metastable soluble anhydrite III, to a method for producing a hydraulic binder based thereon, to the thus obtainable hydraulic binder, to a method for the use thereof in the cement industry and to an industrial plant for carrying out the inventive method. The method consists in stabilising a metastable soluble anhydrite III by mechanically stressing the particles thereof in such a way the crystal structure of the particles is modified and the metastable phase thereof is stabilised. Said invention makes it possible to stabilise the metastable soluble anhydrite III particles without using current steps for heating and quenching said particles. | ||||||
| 31 | Apparatus and process for cooling and de-steaming calcined stucco | US10891964 | 2004-07-15 | US20060010895A1 | 2006-01-19 | Michael Bolind; Christopher Nelson; Bruce Petersen; Michael Porter |
| The present invention is an apparatus and process for cooling and de-steaming hot calcined stucco used in the production of gypsum boards or bagged plaster. The apparatus is a fluid bed stucco cooler and comprises a cooler housing having a plenum having a stucco inlet and stucco outlet. The stucco cooler includes a rotating disk in the plenum. The rotating disk includes nozzle for spraying fluid, and is attached to a rotable shaft extending from the side of the cooler also includes a fluidization pad and agitator to help to mix the air and the stucco powder to insure fluidization, prevent channeling, and prevent the stucco powder from building up on the various components. The air also forces steam from the hot calcined stucco out through an air outlet located at the top of the stucco cooler, thereby de-steaming the stucco. The stucco flows through the plenum and passes over the cooling coils, thereby cooling the stucco as it reaches the stucco outlet. | ||||||
| 32 | Method for the Production of Gypsum-Based Boards and Stucco Slurry Comprising Non-Pregelatinized Migratory Starch for Use Therewith | US16060783 | 2016-12-14 | US20180354857A1 | 2018-12-13 | Richard Morlat; James Fletcher; Radomir Kamler |
| A method for continuously forming gypsum-based panels of high fixing strength comprises the steps of: •forming a mixture comprising stucco, non-pregelatinized migratory starch, glass fibre, fluidizer and water; •casting the mixture in a continuous band; •maintaining the band under conditions sufficient for the stucco to form an interlocking matrix of set gypsum; •cutting the band to form one or more wet panel precursors; and •drying the wet panel precursor to form one or more gypsum-based panels. •The weight ratio of water to stucco in the mixture is less than 0.7; •the stucco is present in the mixture in an amount of over 60 wt % relative to the total solids content of the mixture; •the starch is present in the mixture in an amount of over 3 wt % relative to the the stucco; •the glass fibre is present in the mixture in an amount of over 1 wt % relative to the stucco; •the fluidizer is is present in the mixture in an amount of at least 0.1 wt % relative to the stucco; and the density of the gypsum-based panel is greater than 700 kg/m. | ||||||
| 33 | Method for stabilizing beta-hemihydrate plaster | US14405155 | 2013-06-05 | US09751805B2 | 2017-09-05 | Winfried Aschern; Jörg Bold |
| The instant invention is concerned with the post-treatment of β-hemihydrate plasters for the purpose of stabilization. The invention relies in the addition of a retardant to the calcined β-hemihydrate. It is also the purpose of the invention to provide stabilized β-hemihydrate plasters which exhibit advantageous properties. | ||||||
| 34 | Method for reducing elemental sulfur in gypsum products | US14931766 | 2015-11-03 | US09656876B1 | 2017-05-23 | John W. College; Sang-Ho Lee; Chris Hilton; Yu-Zhi Kiang; Choung-Houng Lai; George Glavin |
| Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products. | ||||||
| 35 | Method For Reducing Elemental Sulfur In Gypsum Products | US14931766 | 2015-11-03 | US20170121183A1 | 2017-05-04 | John W. College; Sang-Ho Lee; Chris Hilton; Yu-Zhi Kiang; Choung-Houng Lai; George Glavin; Helen Ilyashenko |
| Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products. | ||||||
| 36 | Method of Curing A Gypsum Calcination Product | US15110420 | 2015-01-08 | US20160340244A1 | 2016-11-24 | Cedric Biguenet |
| A method of conditioning stucco comprises the steps of supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and conditioning the stucco particles at a temperature of at least 100° C. and a humidity of at least 70%. During the step of conditioning the stucco particles, the bulk density of the stucco particles within the reaction vessel is at least 1 g/cm3. | ||||||
| 37 | Process for continuous modification of dihydrate gypsum and modified dihydrate gypsum obtained by the process | US13055891 | 2009-07-31 | US08529863B2 | 2013-09-10 | Itaru Yokoyama; Kouji Katsumoto; Yasuo Kawamura |
| Disclosed is a process for the continuous modification of dihydrate gypsum. The process includes a hemihydration step of calcining the dihydrate gypsum as a raw material into hemihydrate gypsum and a recrystallization step of hydrating and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of a crystalline form different from the dihydrate gypsum as the raw material. In the recrystallization step, the aqueous slurry in a recrystallization reaction tank is maintained at a constant temperature under stirring such that the aqueous slurry becomes uniform, and a feed rate of the hemihydrate gypsum to the recrystallization reaction tank and a discharge rate of the recrystallized and modified dihydrate gypsum from the recrystallization reaction tank are controlled such that the feed rate and the discharge rate become substantially equal to each other, whereby the feeding of the hemihydrate gypsum and the discharging of the recrystallized and modified dihydrate gypsum are conducted continuously or intermittently. According to the process, dihydrate gypsum as a starting raw material can be converted into high-purity, modified dihydrate gypsum of large crystals by recrystallizing the starting dihydrate gypsum after it is once calcined into hemihydrate gypsum although such modified dihydrate gypsum is not available in general. | ||||||
| 38 | CALCIUM SULFATE HEMIHYDRATE TREATMENT PROCESS | US12890242 | 2010-09-24 | US20110011311A1 | 2011-01-20 | Robert Byron Bruce; Mark Richard Flumiani; Charles E. Blow |
| A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure. | ||||||
| 39 | Method and apparatus for stabilizing plaster | US11014998 | 2004-12-20 | US07371278B2 | 2008-05-13 | Joerg Bold |
| The invention provides a process for stabilizing plaster and an apparatus for implementing the moistening part of the process. The process comprises the following steps: a) providing a heated HH-plaster preferably at temperatures over 100° C.; b) feeding the hot plaster in a moistening device having walls heated to at least 100° C.; c) injecting water and/or steam into the moistening device in conditions that such not yet moistened surfaces of the plaster are exposed to the injected water and/or steam; d) maintaining an atmosphere in the moistening device at a level of the dew point in the range of 75 to 99° C.; e) feeding the moistened blend into a curing device; f) maintaining an atmosphere in the curing device above 75° C. for at least 3 minutes; g) feeding the moistened and cured blend into a drying device; and h) drying said moistened and cured blend.The invention also provides an apparatus for moistening β-hemihydrate plaster comprising a rotating drum with lifting blades inside where all walls in contact with the product are externally heated at a temperature above 100° C. | ||||||
| 40 | Process of aging calcined gypsum | US13167337 | 1937-03-18 | US2177668A | 1939-10-31 | MARSH FRANK L; CHADS DUDLEY C |
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