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Country:
Egypt
Model No:
gypsum
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Egypt
Contact Person Mr. mohamed
cairo, cairo, cairo
Combined water *9.9 min
Caso*2h2o
*5 min
Cao
*0.5 – *3%
So4
*3.5 **6
Mgo
.1 max
Sio2
.*5 max
Al2o3=fe2o3
.*5 max
Cl
.**8 max
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 :
*- gypsite : which is earth precipitate , not clear with soil
.
*- selenite : which is the best in crystal form .
*- alabaster : sculptural use .
*- rocky gypsum
.
treatment :
by calcinations plant , that the ore have some impurities like
silica or sand , caco3 which can remove by crushing in two
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 .
*- add Uncalcined gypsum crushed from 3 to 6 % to produce
Portland cement so solidification speed become low .
*- gypsum contain ****0 % sulfur produce ammonium sulfate
which act as natural fertilizer .
*- glass industry to easily remove the gases .
*- 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
Country: | Egypt |
Model No: | gypsum |
FOB Price: | ( Negotiable ) Get Latest Price |
Place of Origin: | - |
Price for Minimum Order: | - |
Minimum Order Quantity: | - |
Packaging Detail: | - |
Delivery Time: | - |
Supplying Ability: | - |
Payment Type: | PayPal, D/P, T/T |
Product Group : | - |