Limestone By B. N. Minerals

Limestone









LimestoneKeyword: Limestone


Mineral


Lime


Bnm-ls


48-54%+We are one of the most well known traders and suppliers of Limestone.
We offer our clients superior quality of Limestone, which is
available in different range of finishes like natural, honed, polished
and others. Apart from this, our Limestone is also available in varied
thickness & dimensions, meeting the specific decorative demands of
clients. Natural Limestone contains silica in different proportions and
is largely composed of calcite mineral. The Limestone powder contains
calcite mineral due to the marine organism.Grades of Limestones Offered by usCement Industry


Limestone containing about 45% CaO and above is usually preferred for the manufacturing of cement.Magnesia content in the stone should ideally be less than 3%, although as high as 5% MgO is used by the industry.The
proportion of Al2O3 + Fe2O3: SiO2 should be 1:2:5. Magnesia sulphur and
phosphorus are regarding as most undesirable impurities.
Iron & Steel Industry
Limestone is used in this industry both in the blast furnace to
lower the temperature of melting and second to from calcium silicate by
combining with silica of the iron ore, which comes out as slag.For
this purpose good fluxing limestone low in acid constituents such as
silica, alumina, sulphur and phosphorus is required. The limestone
should be dense, massive, preferably fine grained, compact and
non-fretting on burning
Chemical Industry
The calcium carbide manufactures generally prefer lime containing 95% CaO (min.), not more than 3% SiO2, not exceed 2%.
Sugar Industry
In sugar industry lime is used for the clarification of juice form can be beets.Milk of lime 1% in volume of cane juice is added to pre-heated juice.Limestone
to be used in sugar industry must be high in active lime (CaO S 80%
min.) must be low in iron, alumina and silica, etc.
Glass Industry
Glass industry required high limestone (CaCO3: 94.5%) combine CaCO3 and MgCO3 should be 97.5%.
Fertilizers Industry
The latest use of limestone introduced in the country is in the
manufacture of calcium ammonium fertilizers, limestone is used only as
carrier.For this purpose limestone should contain MgCO3 + CaCO3 85% (min.) SiO2 5% (max.) and acid in-soluble 14% (max.)
Chemical properties
CaCO3 : 85-97%CaO : 48-54%+SiO2 : Below 1%1-1.51.5-22-33-4UsageQuicklime and slaked limeSoil conditionerSolid base for many roadsSuppression of methane explosionsCalcium supplement for poultryIncreasing the alkalinity of purified waterExtracting iron
Chemical formulae
CaCO3


Applications






Architecture


Toothpaste




Train stations


Bread and cereals




Banks and other structures


Medicines




Churches


Cosmetics




Monuments


Art




Construction


Steel melting shop




Cement and mortar


Blast furnace




Glass making







Attributes






Hard


Readily available




Durable


Easy to cut




Absorbs water


High solubility




Reactive to acid solutions


Heavy