Improving and using recycled gypsum - Knauf
Improving and using recycled gypsum – the Knauf commitment. Gypsum, the basic material of plasterboard, is a plentiful and widely available material. It is also eminently recyclable and the plasterboard industry has been at the forefront of a drive to develop a …
US5211928A - Method of improving gypsum slurry …
A method for improving gypsum slurry filtration in the production of wet process phosphoric acid wherein an effective amount of carboxylic-type polymer having a portion of sulfonic functionality is used as the filtration aid. Preferred polymers are high molecular weight polymers of acrylic acid and acrylamido methylpropyl sulfonic acid.
Slurry handling in FGD plants - World Pumps
The light gypsum slurry is transferred to the wastewater treatment plant, after which the treated wastewater is disposed of. Wet scrubber FGD plants play a critical role in reducing emissions of sulphur dioxide from coal-burning power stations.
method of improving gypsum slurry filtration in …
US5211928AMethod of improving gypsum slurry filtration . A method for improving gypsum slurry filtration in the production of wet process phosphoric acid wherein an effective amount of carboxylic-type polymer having a portion of sulfonic functionality is used as the filtration aid.
MX2013006929A - Method of improving gypsum …
One or more of these or other problems are improved using a method of making a strong gypsum panel which includes a method for forming a hardened shell structure at the interface of a foamed bubble and a gypsum slurry. A strengthening component is selected from the group consisting of set accelerators, water soluble polyphosphate salts, blends of water soluble polyphosphate salts with starch ...
gypsum slurrypump
Improving Gypsum Slurry Filtration in the Production of , Advances in stone Engineering II: Improving Gypsum Slurry Filtration in the Production of Phosphoric Acid by Adding Cationic Amphiphilic Copolymer. BENEFICIAL KEUSE10F FGD GYPSUM IN ,
method of improving gypsum slurry filtration in …
method of improving gypsum slurry filtration in the gypsum filtration. The effect of clay on gypsum filterability in the ... This method is known as the Odda ... gypsum containing slurry was further processed ... crystals in the slurry before filtration is . Get Price; Patent US8182698 Method for improving …
study on improving absorption of gypsum powder
study gypsum powder - nextgreatentrepreneurin Study on improving absorption of gypsum powder Products Study on improving absorption of gypsum powder Products. midterm review gypsum material Flashcards ... main purpose as to study the changes in gypsum slurry behaviour by incorporatingthree rates (5%, 15% and %)25 of Na-feldspar, ...
GYPSUM COMPOSITION, GYPSUM SLURRY, …
13-8-2015 · Such a gypsum-based building material is usually manufactured by adding water, etc., to, and mixing by a mixer, a gypsum composition wherein a calcined gypsum and a variety of additives are mixed preliminarily, to provide a gypsum slurry (plaster slurry), and shaping into a predetermined shape, subsequently drying, and cutting, such a gypsum slurry and a base stone for board, a glass …
Improving Gypsum Slurry Filtration in the …
Improving Gypsum Slurry Filtration in the Production of Phosphoric Acid by Adding Cationic Amphiphilic Copolymer. Article Preview. Abstract: A cationic amphiphilic copolymer was synthesized with acrylamide (AM), dimethyl diallyl ammonium chloride (DMDAAC), monomer B by solution copolymerization.
US Patent for Gypsum slurries with linear …
The gypsum slurry also optionally includes one or more modifiers that enhance the ability of the polycarboxylate dispersant to fluidize the slurry, thus improving its efficacy. The two-repeating unit dispersant used here may be particularly susceptible to the effects of the modifiers.
Gypsum - an overview | ScienceDirect Topics
Gypsum boards or plasterboards are typical materials used to build light walls. The production process is based on gypsum hydration technology. At the very beginning of the process dehydrated calcium sulfate (gypsum) is converted into CaSO 4 ·0.5H 2 O by heating. Once dehydrated, gypsum is mixed with water, starch, a foaming agent, and other additives.
Method of improving gypsum slurry filtration in the ...
18-5-1993 · A method for improving the filtration of a gypsum slurry in a wet process phosphoric acid manufacturing process which comprises adding to a said gypsum slurry an effective amount of a polymer which consists essentially of about 0.5 to about 99.5%, by weight, of: a) an unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, their salts and …
A Root Cause Study to Determine the Source of …
absorber slurry and gypsum samples were collected during full load operation and at the start of a dewatering run. Sample collection continued in 500 ppm increments until a level of 5,500 ppm was reached. If gypsum moisture exceeded 10% consistently during the study, purging operation could resume until moisture was reduced to less than 10%.
System And Method For Producing A Gypsum …
The method of claim 11, comprising receiving the gypsum slurry from a gypsum slurry production system that comprises: a conveyor providing gypsum, a pump providing a fluid, a mixing device configured to mix the gypsum provided by the conveyor with the fluid provided by the pump to produce the gypsum slurry, and a slurry pump configured to pump the gypsum slurry from the mixing …
Gypsum - Wikipedia
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the stone formula CaSO 4 ·2H 2 O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard/sidewalk chalk, and drywall.A massive fine-grained white or lightly tinted variety of gypsum, called alabaster, has been used for sculpture by many cultures including ...
How Gypsum is Made
“slurry,” or paste. This stucco slurry will then be spread onto stone to form wallboard. The “Bread” That Makes the Wall-board Gypsum wallboard is frequently described as a “sandwich,” with gyp-sum being the “meat” and stone being the “bread.” Making the stone for wallboard is as complex a process as making the wallboard itself.
US Patent Application for GYPSUM SLURRIES WITH …
The gypsum slurry also optionally includes one or more modifiers that enhance the ability of the polycarboxylate dispersant to fluidize the slurry, thus improving its efficacy. The two-repeating unit dispersant used here may be particularly susceptible to the effects of the modifiers.
11.16 Gypsum Manufacturing
11.16 Gypsum Manufacturing 11.16.1 Process Description1-2 Gypsum is calcium sulfate dihydrate (CaSO4 2H2O), a white or gray naturally occurring mineral. Raw gypsum ore is processed into a variety of products such as a portland cement additive, soil conditioner, industrial and building plasters, and gypsum wallboard. To produce plasters or
Improving the Sustainability of Dairy Slurry by A ...
sustainability Article Improving the Sustainability of Dairy Slurry by A Commercial Additive Treatment Federica Borgonovo 1, Cecilia Conti 1,* , Daniela Lovarelli 2, Valentina Ferrante 1 and Marcella Guarino 1 1 Department of Environmental Science and Policy (ESP), Università degli Studi di Milano, Via G. Celoria 10, 20133 Milan, Italy; [email protected] (F.B.); valentina.ferrante ...