LIMESTONE

WHAT IS IT ?
 
LIMESTONE is a mineral which is mined in many states.  A common variety is
Quicklime, the product of calcination, consists of the oxides of calcium and 
magnesium, and in this country it is available in three forms.

High calcium quicklime - containing usually 0.5 to 2.5 percent magnesium oxide.

Dolomitic quicklime - containing usually 35 to 40 percent magnesium oxide.

Magnesium quicklime - containing usually 5 to 10 percent magnesium oxide.

Chemical lime is a white solid having a crystalline structure. Quicklime is 
highly reactive with water, generating considerable heat in the hydration process. 
This material will react with the moisture in the air, and as such, it has found 
application as a desiccant. In the presence of moisture, the lime reacts slowly 
with the carbon dioxide of the air, forming water insoluble carbonates. 
As a chemically active material it is desirable to reduce atmospheric exposure 
during handling and storage to a minimum.

Lump lime - the product with a maximum size of eight inches in diameter.

Crusted or pebble lime - the product ranging in size from about 1/4 to 2 inches.

Ground lime - the product resulting from grinding the larger sized material.  
A typical size is substantially all material passing a No. 8 sieve and 40 to 60 
percent passing a No. 100 sieve.

Pulverized lime - the product resulting from a more intense grinding than is 
used to produce ground lime.  A typical size is all material substantially 
passing a No. 20 sieve and 85 to 95 percent passing a No. 100 sieve

Pelletized lime - one inch sized pellets or briquettes, molded from 
quicklime fines.
 
HOW IS IT SHIPPED ?
Quicklime is shipped in open and closed hoppers, tankers, and in 50 Ib. paper bags and one ton bulk bags .
WHAT IS IT USED FOR ?
METALLURGY: STEEL MANUFACTURING, Steel Products Manufacture, Magnesium Manufacture, Alumina Manufacture, Ore Flotation and Non-Ferrous Metal Smelting. PULP AND PAPER: Sulfate Process, Sulfite Process, Bleaching, Precipitated Calcium Carbonate, Strawboard Manufacture, and in the treatment of pulp and paper mill liquid wastes, as a coagulant in color removal. CHEMICALS: Alkalis, Calcium Carbide and Cyanimide, Petrochemicals, Bleaches, Dye and Dyestuff Intermediates and Coke-By-Products. In addition, it is used in the purification of citric acid, glucose and dextrin: metallic calcium; soda-lime, an adsorbent; and for countless other minor or isolated purposes, such as for CO2 absorption. ENVIRONMENTAL USES WATER TREATMENT: Scope, Softening, Purification, Coagulation, Neutralization of Acid Water, Silica Removal and Removal of Other Impurities, SEWAGE TREATMENT: Maintain proper pH and Stabilizing Sewage Sludge. INDUSTRIAL TRADE WASTES: Treatment of industrial trade wastes to abate pollution from Steel and Metal Fabricating Plants, Chemical and Explosives Plants, Acid Mine Drainage, Paper and Fibers, Food Plants and in clarifying "water gas" acid waste effluents. FLUE GAS DESULFURIZATION SOLID WASTES DISPOSAL CERAMIC PRODUCTS: Glass, Refractories, and in the production of whiteware pottery, lime is sometimes employed to bind the kaolin and ball clays present. BUILDING MATERIALS: Calcium Silicate Brick, Concrete Products, Miscellaneous Building Units, and Insulation Materials. PROTECTIVE COATINGS: Pigments, Water Paints, and Varnish. FOOD AND FOOD BY-PRODUCTS: Dairy Industry, Sugar Industry, Animal Glue and Gelatin Industries, Baking Industry, and CA (controlled atmospheric), Storage of Fresh Fruit and Vegetables. All tortillas are made with lime treatment. MISCELLANEOUS USES: Petroleum, Leather, and Rubber.
S.A. McCall