Ore Forming Minerals

Physical ,chemical properties and uses of ore forming minerals

Ankit mangal 559/11

Prateek gour 551/11

Inder prakash chauhan 463/11

Ore forming minerals

Ore forming mineral is defined as a mineral which contains a metallic element in a quantity that can be exploited and extracted for use at an economical cost.

All ores are minerals but not all minerals are ores.

The difference between a mineral and an ore can be elucidated by the following example.

Clays are rich in aluminium but since metal can not be extracted from ordinary clays at an economical cost,these are not included among the ore of aluminium but bauxite is an ore of aluminium since aluminium can be recoverd from bauxite at economical cost.

Hematite(fe2o3)

Physical properties…

Color-reddish brown to black

Crystel-rombohedral

Hardness-5.5-6.5

Specific gravity-4.9-5.3

Structure-columnar

Lusture-dull or metallic

Streak-cherry red browen

Chemical properties…

Hematite ,a mineral consists largely of the iron oxide ferric oxide .

Main constitutes of hematite is iron and oxygen its chemical composition is fe2o3..

Uses of hematite..

Hematite is the chief ore of iron .

Hematite is shiny and comes in many colors ,making jewelry design one of the important uses of hematite.

If hematite is crushed then it can be used to color paint .similar to paint dye,hematite can also be used to color fabrics.

It is the main raw material for production of steel and iron ore..

Main occurance of hematite ore is jharkhand,orissa ,madhya pradesh,andhra pradesh,karnatka and goa ..

We have extensive deposit of hematite around 12000 mt.

Hematite is considered as high grade iron ore

Magnetite(fe3o4)

Physical properties

Color-black

Crystel-isometric

Hardness-5.5-6.5

Specific gravity-5.1

Structure-granulator,massive

Lusture- metallic or sub metallic

Streak-black


Magnetite is one of the most common oxide minerals and also one of the most common iron minerals.

Main constitutes of magnetite is iron and oxygen its chemical composition is fe3o4..

Uses of magnetite..

Most of the magnetite mined is used as an ore of iron .iron libreated from the ore is usually used to make iron ,steel and other alloys.

It is used as a toner in electrophotography,as a micronutrient in paints,as an aggregate in high density concrete.

When in powdered form magnetite can be use to remove arsenic from a water supply.

A mixture of magnetite and corundum is known as emery ,which is used as an abrasive.

Magnetite is used in certain types of thermite.

Main occurance of magnetite ore is jharkhand,orissa ,madhya pradesh,andhra pradesh,karnatka and goa ..

We have extensive deposit of magntite around 9000 mt

Limonite(2fe2o3.3h2o)


Color-various shades of browen and yellow

Crystel-amorphous

Hardness-5-5.5

Specific gravity-3.6-4

Structure-botryiodal massive

Lusture-submetallic

Streak-yellowish


Limonite is an iron ore consisting of a mixture of hydrated iron oxide-hydroxides in varying composition.

Main constitutes of limonite is iron and oxygen and some amount of water molecule its chemical composition is 2fe2o3.3h2o

Uses of limonite..

One of the first uses was as a pigment.

Limonite is a minor ore of iron,a mid value metal useful for weapons and armor.

It is used in chinese in medicine and it is used in white paint.

Main occurance of limonite ore is jharkhand,orissa ,madhya pradesh,andhra pradesh,karnatka and goa ..

Chromite(fecr3o4)


Color-iron black to brownish black

Crystel-isometric

Hardness-5.5 ………………………...


Structure-massive commonly granular

Lusture-sub metallic

Streak-browen


Chromite is an iron chromium oxide mineral and the only ore of chromium metal.

Main constitutes of chromite is iron ,chromium and oxygen its chemical composition is fecr3o4

Uses of chromite

Chromite is the only ore of chromium ,a metal used to induce hardness,toughness and chemical resistance in steel.the alloy produced is known as stainless steel.

When alloyed with iron and nickel it produces a alloy known as nichrome.

It is used in chemical industry for manufacture of chromates.

Chromite is also used as a refractory material because it has a high heat stability.

Main occurance of chromite ore is orissa ,mysore, chennai and ratnagiri ..

Pyrolusite(Mno2)

Physical properties

Color-darkish ,black to lighter grey,sometimes bluish

Crystel-orthorhombic

Hardness-2-2.5

Specific gravity-4.8

Structure-massive

Lusture- metallic

Streak-black,bluish black

Chemical properties

Pyrolusite is a mineral consisting essentially of manganese dioxide(MnO2) .

Main constitutes of pyrolusite is manganese and oxygen its chemical composition is Mno2.

Uses of pyrolusite

Pyrolusite is as an important as an ore of manganese.it is extensively used for the manufacture of ferromanganese and of various alloys such as manganese-bronze.

It is used in the prepration of chlorine,green and violet paints.

It is extensively used in steel smelting and in the manufacture of dry cell batteries.

Main occurance of pyrolusite ore is madhya pradesh ,maharastra jabalpur ,nagpur chindwara etc.

We have very prominent place in manganese market of the world.

Psilomelane


Color-black with grey pyrolusite bands

Crystel-amorphous

Hardness-5-6


Structure-massive


Streak-brownish black


Psilomelane is probabley a mixture of sevral minerals but is composed mostely of the mineral romanechite.

Psilomelane consists of hydrous manganese oxide with varable amounts of barium and potassium.

Main constitutes of psilomelane is manganese and oxygen its chemical composition is Mno2(colloidal)

Uses of psilomelane..

Psilomelane is still an important ore of manganese but not as common as pyrolusite.

Used in manufacture of ferro –manganese alloys , chemicals and metallurgy.

Main occurance of psilomelane ore is madhya pradesh ,maharastra jabalpur ,nagpur chindwara etc.

We have very prominent place in manganese market of the world.

Bauxite(Al2o3.nH2o)


Colour-light brown

Crystel-amorphous

Hardness-about 3-7


Structure-grannular

Lusture- dulll

Streak-as the colour


It is a mixture of hydrous aluminium oxides,aluminium hydroxides,clay minerals and insoluble materials such as quartz ,hematite,magnetite ,siderite and geothite

Uses of bauxite..

Bauxite is the principal ore of aluminium.

Main occurance of bauxite ore is jharkhand,madhya pradesh ,maharastra ,gujrat ,karnatka ,orrisa etc.

Almost all of the aluminium that has ever been produced has been made from bauxite .

Bauxite is used in cement,chemicals,face makeup,soda cans,dishwashers,siding for houses and other aluminium production.

Total reserves-2500MT

Used as an ore of aluminum and manuabrasives.

Chalcopyrite(Cufes2)


Colour-golden yellow

Crystel-tetragonal

Hardness-3.5-4


Structure-crystalline and massive


Strek-greenish black


Chalcopyrite is a copper iron sulphide.

Main constitutes of chalcopyrite is copper and iron its chemical composition is Cufes2..

Uses of chalcopyrite..

Chalcopyrite is the main ore of copper.

Main occurance of chalcopyrite ore is jharkhand, madhya pradesh,rajasthan,andhra pradesh, karnatka etc.

Chalcopyrite is used of ore of copper for pipes,electrical circuits,coins,ammunition,brass and bronze.

We are presently deficient in copper so we are imported in large qyuantites to meet our needs of domestic consumption.

Pyrite(Fes2)


Color-pale brass yellow

Crystel-isometric

Hardness-6-6.5


Structure-crystalline

Lusture- metallic

Strek- black


Main constitutes of pyrite is iron and sulfur its chemical composition is fes2.

It is also known as marcasite and fools gold bcz sometimes it resembles gold.

Uses of pyrite..

The main uses today are the production of sulfur dioxide for the paper industry and sulfuric acid for the chemical industry.

Main occurance of pyrite ore is jharkhand, madhya pradesh,rajasthan,andhra pradesh, karnatka etc.

pyrite is the main raw material for production of sulfur.

Iron content in pyrite is 46.6%

Galena (Pbs)

Physical properties

Color-lead grey

Crystel-isometric

Hardness-2.5


Structure- massive,grannular

Lusture-metallic

Strek-lead grey

Chemical properties

Galena is a lead sulfide mineral with a chemical composition of pbs.

Uses of Galena

Galena is a very important mineral because it serves as an ore for most of the world ‘s lead production.

The number one use of lead today is in the lead acid batteries that are used to start automobiles.

Lead is also one of the metals used as in energy storage systems associated with power generation and hybrid vehicles.

Main occurance of galena ore is rajasthan,uttar pradesh,gujrat,tamilnadu, madhya pradesh,etc.

Total reserve-380MT

Amount of Pb in galena is 70%.

Sphalerite


Color-pale yellow,black,light brown

Crystel-isometric

Hardness-3.9-4.2


Structure- massive

Lusture-resinous

Strek-raddish browen to black


It consists largely of zinc sulfide in crystalline form but always contains varriable iron.

Uses of sphalerite..

Sphalerite is the primary ore of zinc and is often mined for its content of cadmium,indium,gallium,or germanium.

Sphalerite is often used in making metals like copper,lead and silver.

It also shows its usefulness in jewelry business.

Main occurance of sphalerite ore is rajasthan,uttar ptadesh, madhya pradesh,tamilnadu himachal pradesh etc.

Total reserves-380MT

Amount of zinc in sphalerite is 67%.

Documents

Ore Forming Minerals