The limestone is mostly made up with the mineral calcium carbonate. It does not mean that the rocks do not dissolve very quickly. When the limestone reacts with hydronium ion. Limestone is the source material for such value added products like calcined, hydrated, precipitated etc. Limestone used for several purposes i.e. building, construction, cement, glass, road construction besides to extensive use to neutralize acids i.e. PH control.
COMMON NAME AND CHEMICAL FORMULA
The common name is Limestone and chemical name is Calcium carbonate denoted by the chemical formula with the name of CaCO3. Limestone is composed of calcium carbonate and known as CaCO3. It can become quicklime i.e. Calcium Hydroxide and carbon dioxide from high levels of heat. It can be shown as Calcium Carbonate i.e. Calcium Oxide + Carbon Dioxide. (CaCO3 = CaO + CO2)
The carbon dioxide and water are only products when reaction between acid and a carbonate forming a salt. The acid reacts with metal carbonates by producing carbon dioxide and salt. The production of new materials and energy changes the evidence of chemical reactions.
Word equations – the reaction between acids and metals
When an acid reacts with metal, a salt and hydrogen are produced:
Acid + metal ® salt + hydrogen
For example : Sulfuric acid + calcium ® calcium sulfate + hydrogen
The salt that is produced depends upon which acid and which metal react.
LIMESTONE AND ITS DERIVATIVES
Limestone and its derivatives have many advantages for the areas like building industry, cement, Iron and steel, Ceramics, glass, electricity generation, pharmaceutical, dietary supplement, fertilizers, snow control, pulp and paper, chemical, drinking water, civil construction, engineering, agriculture etc. Some important uses of limestone and its derivates are as follows:
The production of lime by thermal decomposition is possible i.e. Limestone = Lime + Carbon dioxide. This is the main reaction in commercial lime burning to make calcium oxide.
Lime is used to neutralize acidic soil and it is also used to remove sulfur dioxide from coal-fired power station gases i.e. FGD.
The limestone dust is frequently used as filler to give bulk expensive resins, adhesives, polymers etc.
The conversion cost of limestone to useful product depends upon its location and transportation place. There will be capital costs besides maintenance costs operating costs and management costs etc that are to be met while conversion of limestone to useful products. The conversion costs attracts to the lime stone which inclusive of high interest rates, security costs, energy costs. Hence the industry regulations should support the Limestone so that competitive growth will exist. Beside the conversion cost also linked with many environmental issues i.e. dust, noise soil erosion etc.