Name of mineral

Chemical formula

Chemical composition/%

(g/cm³)

density (g/cm³)

mohs hardness

crystal

shape

Colour

barite

BaSO₄

BaO₆5.7;SO₃34.3

4.5

2.5~3.5

diagonal quadrate

Clintheriform,columnar

Gray white

Application field

Main use

remarks:

oil drilling

The Circulation mud weighting agent of rotary boring of oil and gas well

Cooling the drill bit,take away the clast cutted, lubricate drill pipe, close wall of hole,control the pressure of oil and gas, avoid the spurt of oil well

Chemical industry

Used for producing BaCo3,BaCl2,BaSO₄

Lithopone,Ba(OH)2,BaO and so on barium compound.

barium compound is widely used in reagent,catalytic,the refining of sugar,prevention and cure,fireproof,all kinds of fireworks,the coagulant of synthal,plastic,insectifuge,the case-hardening of steel, phosphor powder,welding agent,Oil additive and so on.

glass

Deoxidizer,clarifying agent,fluxing agent

Increase the Optical temperate of glass and lustre and intensity.

Rubber,plastics,paint

Filler,optical brighteners,weighting compound

building

The aggregate of concrete,material of paving

1.The pipeline hidden in everglade of great pressure. 2.used in nuclear facilities replace of Pb board. 3.atomic energy factory 4. the shield of X Radiation Laboratory. 5.extend the road surface and so on

use

specification and quality demand

remarks

Oil drilling

Density ≥4.2g/cm³; fineness-200mesh≥97%-325 85%~90%;hydrotrope is 0.1%; the effect of clay; the viscosity of adding 1% plaster is 0.125Pa·S;the content of BaSO₄ ≥90%.

Standard of oil ministry issuing

Chemical industry

grade

BaSO₄/%

SiO₂/%

Fe₂O₃/%

AI₂O₃/%

/%

water soluble salt /%

I grade

95

<1.5

<0.5

<1

<0.3

Ⅱgrade

90

<2.5

<1.5

<2

<1.0

IIIgrade

85

<2.5

<1.5

<2

<1.0

Use

Demand index

remarks

BaSO₄/%

CaCO3/%

Fe₂O₃/%

Granularity can througth/

mesh

Coating material

90~95

0.05

<325

The demand of whiteness is high

Rubber filling

>98

<0.36

microscale

<325

It can not contain impurity of Mn,Cu,Pb

Normal glass

>96

<0.1

<0.2

60

SiO₂<1.5%,AI₂O₃<0.15%

lithopone

95~98

<1

SiO₂<1%, and the more better the content of AI₂O₃ is

Drilling grade

Density ≥4.2g/cm³, BaSO₄≥92%, the content of below 200mesh ≤3%, the content of below 325mesh ≤5%

Chemical industry grade

BaSO₄>95%,the content of Fe₂Oand SrSO₄ ≤ 1%. The content of SiO₂ and CaO allowed to be microscale

Paint grade

The whiteness must be high, and it can pass through 325mesh at least.

Density/(kg/m³)

BaSO₄/%

Ca content/×10^-6

Granularity (-45μm)/%

≥4200

≥92

≤250

95

BaSO₄/%

Pb/%

Heavy metal

Pb/%

Fluidifying matter /×10^-6

As /×10^-6

LOI at 600°C/%

%

-20μm granularity

colour

smell

≥97.5

≤0.001

≤0.1

<0.1

2

90

White and close to white

tasteless