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Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3).
we can reach up to 45 micron.
Uses limestone:
1- Portland cement industry: about 76 % that mix with nonmetallic minerals which is chemically treated.
2- Anhydrous sod carbonates: which is important to glass industry, detergence industry, purification industry, by reaction of co2 produce from calcinations with sod chloride and ammonia.
3- Catalyst in iron kilns: that iron have silica and ammonia as impurities which removed by limestone, they found that 410 kg of limestone produce 1 ton of iron.
4- Rocky fiber: by melting limestone in kilns and pumping steam strongly, so fiber formed which use as thermal isolation.
5- Lime industry: limestone is fired to lose co2 with 44 % from its weight leaving cao, that happen at 1000 – 1100 degree, which use in glass, paper building industry.
6- Metal filler: easy to grind, low oil absorption, do not cause machine corrosion isolation of tank and roofs,, painting and ceramic industries.
7- Food industry: the pure one for birds, treatment for sugar.
8- Ornamental stone: and building.
9- paper: In alkaline papermaking, calcium carbonate is used as a paper filler and coating. Both uses require high brightness, high purity, small particle size, and lack of abrasion.
10- coating: used white pigment in paints because it is available at relatively low cost and has high brightness for TiO2 extension, high purity, low abrasivity, and resistance to weathering.
11- plastic and rubber industry: used filler in plastics due to its low cost, low abrasion, low oil absorption, low moisture, high brightness, and easy dispersion with conventional mixing equipment, In plastics they are used to improve mar and impact resistance, surface gloss, weatherability, shrin
Black sands are sandy deposits that contain a high percentage of heavy metals of economic importance because they enter into important strategic industries, and they are named so because they contain a high percentage of dark-black minerals (iron minerals) such as ilmenite and magnetite.
Black sand contains a percentage of economic minerals (ilmenite - zircon - magnetite - rutile - agate) and monazite, which contains radioactive minerals. Many countries extract heavy minerals from the black sands they host due to their economic importance. Also, the beaches are cleared of environmentally harmful radioactive substances
The hydrated lime is a refined hydrate that has a small median particle size, good flow properties, high surface area, free of sand, and high total & available Ca(OH)2, free of lumps or other foreign matter which might interfere with the operation of the chemical feed facilities.
Hydrated lime meet the following industry standards:
AWWA standard B202-02
Certified to NSF standard 60
Certified to ASTM standards C977-03, C1097-06a, C207-06 (type N only), and C911-06
Property Range
Ca(OH)2 -Total 98.0% or greater
Ca(OH)2 -Available 96% or greater
C02 0.5% or less
CaCO3 2% or less
Free Moisture 0.7% or less
CaSO4 0.1% or less
Sulfur -Equivalent 240 ppm or less
Crystalline Silica 0.1% or less
Si02 0.5% or less
A1203 0.2% or less
Fe203 0.06% or less
MgO 0.4% or less
P205 100 ppm or less
MnO 25 ppm or less
Water Insoluble Material 3% or less
Specific Gravity 2.34
Dry Brightness, G.E 92.0
Median Particle Size-Sedigraph 2 micron
pH 12.4
-100 Mesh (150 �µm) 100.0%
-200 Mesh (75 µm) 99.0%
-325 Mesh (45 µm) 94.0%
Apparent Dry Bulk Density -Loose 22 lbs./ft3
Apparent Dry Bulk Density- Packed 35 lbs/ft3
Alpha is supplier of premium quality Quicklime.
Alpha commitment to quality ensures that end users are provided
with a low residue, high purity material which meets their requirements.
Available Lime Index (as CaO) >90%
Loss on Ignition 1.0-5.0%
Residue on Slaking 600u m >5.0%
Specific Gravity: 3.2 - 3.4
Bulk Density: 1000 - 1050kg/m3
