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17Preparation of alphacalcium sulfate hemihydrate by _2012319Preparation of alphacalcium sulfate hemihydrate by to 6 h (a patented variant of this process is autoclaveable glass reactor under care Inquire Now
33System and method for the production of gypsum using heat 2, 2009 (now U S Pat No 7,955,587) and entitled Process for converted to an alpha hemihydrate and thereafter transported to an exit 42 Inquire Now
13Process for producing gypsum building materialsto a suitable shaping process, characterized in that milled calcium sulphate alphahemihydrate having a Blaine specific surface area greater than 2000 cm/ Inquire Now
37Basic oil well cementhemihydrate to insoluble anhydrite of 20:80 to The heat generated in the grinding process converts we mean either or both the alpha and beta form Inquire Now
26Calcium sulphate alphamono:hydrate mfr by autoclaving di: 2012819and over 5 vol % air in pores are heated with water in autoclave at 110180 deg C under controlled pressure to recrystallise to alphahemihy Inquire Now
7Proper conditisno on developing phosphogypsum to compensate Proper conditisno on developing phosphogypsum to compensate for natural gypsum process, the proper conditisno for Alpha hemihydrate synthesis is to coat Inquire Now
12FTIR Spectroscopy for Gypsum after Treatment with Steam to perpetrate βhemihydrate Mβ and another method is called autoclaved (16), formation of γCaSO4 phase in dehydration process gypsum (17) Inquire Now
10autoclave_autoclave_autoclave_ hemihydrate gypsum, this paper studies the reasonable autoclave process of α 1 subject to the action of an autoclave autoclave,autoclave Inquire Now
30Gypsum board comprising a mineral caseA continuous process for the production of gypsum board of variable yet predictable particles of gypsum are substantially converted to fibrous alpha hemihyd Inquire Now
31Production of gypsum hemihydrate with waste heat, aqueous H 2 Alpha gypsum hemihydrate is obtained by calcining calcium sulfate dihydrate, generated with fluegas desulfurization of power plants or by chemical process, Inquire Now
16Properties and Application of αHemihydrated Gypsum of Great hemihydrate gypsumcrystalspropertypotteryA kind of hemihydrated gypsum of great crystals and it has higher ratio of gypsum to water in standard csnoisten Inquire Now
11 GranularityMorphology and Strength of Alphahemihydrate the appearance by using hydrothermal production process in pressure The result of the test suggested that alpha hemihydrated gypsum will have high strength Inquire Now
35 for the preparation of fibrous calcium sulfate hemihydrateA process is described for the formation of fibrous calcium sulfate hemihydrate, the fibers thereof having specified dimensisno, wherein a dilute aqueous Inquire Now
22Process of manufacturing gypsum products1 In a process of manufacturing gypsum products comprising crushing of natural to a hemihydrate, even at low pressures (1 to 1 5 atm) it re Inquire Now
24Application of a diisocyanate for producing composite gypsum 1 A process for making a composite material, to form acicular calcium sulfate alpha hemihydrate The source of the gypsum may be from raw ore Inquire Now
34Method for the control of excessive corrosion in phosphoric acid plants having a digester system operating by a hemihydrate process In One purpose of calcination is to oxidize organic carbon in the ore to Inquire Now
27Method of forming a synthetic cap on a bulk material pileThese csnotituents may be mixed and applied to cover a bulk material pile The hydration process for alphahemihydrate and betahemihydrate are the same Inquire Now
20Process for producing gypsum building materials9 The process according to claim 1 wherein said step of mixing calcium sulphate alphahemihydrate and water includes adding waste material from previously Inquire Now
9CiNii Articles αhemihydrate to the formation of α and βhemihydrate, The formation of needlelike ALPHA calcium sulfate The dehydration process of calcium sulfite tetrah Inquire Now
40Headbox for gypsum/fiber board productionA headbox for use in a water felting process includes a housing and two rotating horizontal distribution rolls The housing has curved sectisno shaped toInquire Now
23Process of manufacturing gypsum products1 In a process of manufacturing gypsum products comprising crushing of natural to a hemihydrate, even at low pressures (1 to 1 5 atm) it re Inquire Now
36Waterresistant additives for gypsum wood fiber productsIn a continuous process, the slurry/substrate combination is then sized by to convert the gypsum to calcium sulfate alpha hemihydrate During the Inquire Now
19Calcium sulfate hemihydrate of low csnoistencyAn improved quotlumpquot process for producing alpha gypsum, calcium sulfate hemihydrate, from natural gypsum rock of the type wherein lumps of gypsum rock Inquire Now
29PROCESS FOR PRODUCING A NSFERTILIZERhemihydrate calcium sulphate, and subsequently The process according to the invention is characterized alphahemihydrate CaSO4 23 9 68 100 100 100 Inquire Now
14 of Locally Prepared Alphacalcium Sulfate HemihydrateEvaluation of Some Physical Properties of Locally Prepared Alphacalcium Sulfate HemihydrateAims: Aim of the study is to evaluate some physical properties of Inquire Now
32 aqueous resin emulsion and calcium sulfate hemihydrate said composition comprising a calcium sulphate alphahemihydrate plaster and an 12 A process according to claim 11, wherein the amount of water present Inquire Now
39Process for the production of gypsumbased composite boards 5015449 Process for making csnotruction grade calcium sulfate alphahemihydrate to transform the hemihydrate formed again to dihydrate The temperature of Inquire Now
18Dehydration of gypsum in the water suspensionExperimental The dehydration process of gypsum in water suspension under suspensisno in an autoclave proceeds through hemihydrate to insol anhydrite, Inquire Now
25Method of forming a gypsum based productto produce an alphahemihydrate slurry therein passing the alphahemihydrate slurry from the vessel to a mixer, adding additional water to the mixer, Inquire Now
38 suspension by continuous vacuum filtration while hot to Sepn of alphaCaSO4 hemihydrate (I) from its suspensisno discharged from an autoclave or reaction vessel, comprises passing the suspension to a Inquire Now
6AutoclaveFree Formation of αHemihydrate GypsumALFRED Zuz,IVAN Older,FELICIA Thiemann Autoclavefree formation of αhemihydrate gypsum[J] J Am Ceram Soc,1991,74:11171124 Inquire Now
15 of αcalcium sulfate hemihydrate in glycerolwater solutionhemihydrate (αHH) mediated by trace NaCl and Na2EDTA to regulate the NaCl plays a role in accelerating the nucleation and crystal growth process, Inquire Now
21PROCESS FOR THE PURIFICATION OF RESIDUAL GYPSUM FORMED IN THE United States Patent PROCESS FOR THE PURIFICATION It is known that conversion to the hemihydrate can alphahemihydrate, crystallized in the form of Inquire Now
28 ZUR HERSTELLUNG VON CALCIUMSULFATHALBHYDRAT IN ALPHAKON A process and apparatus for producing calcium sulphate hemihydrate in the alphaconfiguration includes transferring open vessel of calcium sulphate dihydrate Inquire Now