Prix FOB
Obtenir le dernier prix( Negotiable )
|- Minimum Order
Pays:
Egypt
N ° de modèle:
gypsum
Prix FOB:
( Negotiable ) Obtenir le dernier prix
Localité:
-
Prix de commande minimale:
-
Commande minimale:
-
Packaging Detail:
-
Heure de livraison:
-
Capacité de Fournir:
-
Payment Type:
PayPal, D/P, T/T
Groupe de produits :
-
Egypt
Personne àcontacter Mr. mohamed
cairo, cairo, cairo
 Combined water  *9.9 min
Caso*2h2o                Â
*5 min
Cao                             Â
*0.5 – *3%
So4Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
*3.5 **6
Mgo                               Â
.1 max
Sio2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
.*5 max
Al2o3=fe2o3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
.*5 max
Cl                                           Â
.**8 max
Â
General
Gypsum is a very soft sulfate mineral composed of calcium sulfate
dihydrate, with the chemical formula CaSO4•2H2O. It is found in
alabaster
Gypsum is moderately water-soluble (~2.0–2.5 g/L at *5 °C) and,
in contrast to most other salts, it exhibits a retrograde
solubility, becoming less soluble at higher temperatures. When
the crystal lattice is heated it loses liquid water molecules to
evaporation and thus gains solidity.
, Gypsum is hydrated calcium sulfate formed by the evaporation of
brines , near to sea then hydration ,
- it have several kind :
*-Â gypsite : which is earth precipitate , not clear with
soil .
*-Â selenite : which is the best in crystal form .
*-Â alabaster : sculptural use .
*-Â rocky gypsum
.                  Â
treatment :
by calcinations plant , that the ore have some impurities like
silica or sand , caco3 which can remove by crushing in twoÂ
steps low crushing and then hammer crushing to be in lenses size
, after that grinding the ore to fine particles , then
beneficiation by washing to remove the impurities which dissolved
with remove organic impurities by flotation , then drying and in
the end the kiln of calcinations .
uses :
*- calcinated gypsum is about *5 % of gypsum uses that
we heat the gypsum to **0 degree which remove water and become
hemi hydrated gypsum that called plaster of paris , it used in
wall plaster , wall lining , plaster board , wall board ,
tiles for ceikings , partitions. Thermal isolation , regulator to
moisture measurements .
*-Â add Uncalcined gypsum crushed from 3 to 6 % to produce
Portland cement so solidification speed become low .
*-Â gypsum contain ****0 % sulfur produce ammonium sulfate
which act as natural fertilizer .
*-Â glass industry to easily remove the gases .
*-Â fine gypsum use in resin industry , paper filler , in
soil used in drilling petroleum well .
• by heating to ***3 degree , calcium sulfide form which
produce sulfuric acid and lime .
• A binder in fast-dry tennis court clay.
• Plaster of Paris (surgical splints; casting moulds;
modeling).
• A wood substitute in the ancient world; for example, when
wood became scarce due to deforestation on Bronze Age Crete,
gypsum was employed in building construction at locations where
wood was previously used.[*9]
• A tofu (soy bean curd) coagulant, making it ultimately a
major source of dietary calcium, especially in Asian cultures
which traditionally use few dairy products.
• Adding hardness to water used for homebrewing.
• A component of Portland cement used to prevent flash
setting of concrete.
• Soil/water potential monitoring (soil moisture
tension).
• A common ingredient in making mead.
• In the medieval period it was mixed, by scribes and
illuminators, with lead carbonate (powdered white lead) to make
gesso which was applied to illuminated letters and gilded with
gold in illuminated manuscripts.
• In foot creams, shampoos and many other hair products.
• Impression plasters in dentistry
Â
| Pays: | Egypt |
| N ° de modèle: | gypsum |
| Prix FOB: | ( Negotiable ) Obtenir le dernier prix |
| Localité: | - |
| Prix de commande minimale: | - |
| Commande minimale: | - |
| Packaging Detail: | - |
| Heure de livraison: | - |
| Capacité de Fournir: | - |
| Payment Type: | PayPal, D/P, T/T |
| Groupe de produits : | - |
