1. Introduction of Barite
Barite is a mineral composed of barium sulfate (BaSO4). It receives its name from the Greek word "barys" which means "heavy." This name is in response to barite's high specific gravity of 4.5, which is exceptional for a nonmetallic mineral. The high specific gravity of barite makes it suitable for a wide range of industrial, medical, and manufacturing uses. Barite also serves as the principal ore of barium.

Part2
2. Application of Barite Powder
1). Oil Drilling Muds
The oil and gas industry is the primary user of barite worldwide. There it is used as a weighting agent in drilling mud. This is a growth industry, as global demand for oil and natural gas has been on a long-term increase.
Most barite produced is used as a weighting agent in drilling muds. These high-density mud is pumped down the drill stem, exit through the cutting bit and return to the surface between the drill stem and the wall of the well. This flow of fluid does two things: 1) it cools the drill bit; 2) the high-density barite mud suspends the rock cuttings produced by the drill and carries them up to the surface.


Drilling-grade barite is produced from commercial barium sulfate-containing ores. The manufacturer shall retain certificates of analysis or similar documentation on these commercial barium sulfate ores. It may be produced from a single ore or a blend of ores and may be a straight-mined product or processed by beneficiation methods, i.e. washing, tabling, jigging or flotation. It may contain accessory minerals in addition to the barium sulfate (BaSO4) mineral. Because of mineral impurities, commercial barite can vary in colour from off-white to grey to red or brown.

Drilling-grade barite shall be deemed to meet the requirements of the International Standard API-13A.

Chemical Composition	Value	Unit of Measure	Method
BaSO4(Including SrSO4)	90 Min	% by wt	XRF
SiO2	5 Max	% by wt	XRF
Hg	1 ppm Max	% by wt	XRF
Cd	3 ppm Max	% by wt	XRF
Water Soluble Alkaline Earth Metals as Calcium	250 mg/kg Max		API-13A
Physical Properties	Value	Unit of Measure	Method
Specific Gravity(SG)	4.2g/cm3 Min	Le Chatelier Flask	API-13A
Moisture Content	0.3 Max	% by wt	ISO 787/2
Loss on Ignition(LOI)	0.5 Max	% by wt	2.5 Hrs at 1000℃
Viscosity	125cps Max	cps of water-barite blend at density 2.5kg/l before and after addition of gypsum
Particle size		Valve
Residue greater than 75 micrometers		3.0 wt. Percent, Maximum
Residue greater than 45 micrometers		5% Min-15% Max
Particles less than 6 micrometers in equivalent spherical diameter		30 wt. percent, maximum

2). Industrial Applications
a. Paint Industry: In paint industry, barite powder can be used as filling to control the viscosity of the paint compatibly to make the products with bright color, good stability. 

Technical Parameter:

Chemical Composition	Value
BaSO4	≥90-95%
Fe2O3	≤0.05%
Whiteness	High
Particle Size	≤45 micron

b. Plastic Industry: In plastic industry, it is used as the filling of plastic ABS to make the products with bright color. It also can improve the intensity, stiffness and abrasive resistance.
Technical Parameter:

Chemical Composition	Value
BaSO4	≥90-95%
Fe2O3	≤0.05%
Whiteness	High
Particle Size	≤45 micron

c. Rubber Industry: In rubber industry, Barytes less than 500 mesh can be used as the filling of rubber products to save cost. It can improve the intensity, and acid, alkali, and water proof, and also has benefit for the Natural Rubber and Synthetic Rubber.

Chemical Composition	Value
BaSO4	＞98%
CaCo3	<0.36%
Fe2O3	microscale
Mn	0
Cu	0
Pb	0
Particle Size	≤45 micron

d. Paper-making Industry: In the papermaking industry, high-refined barytes powder can be used as the filling of white paperboard and coat paper, improve the whiteness and percentage of coverage.

Chemical Composition	Value
BaSO4	＞98%
CaCo3	<0.36%
Fe2O3	microscale
MgO	0
Cu	0
Pb	0
Particle Size	≤45 micron

Part3
3. ZENITH’s Mills for Barite Grinding

 

1) MTW Trapezium Grinding Mill

Flowchart Introduction:
Loader put Barite ore into the barite hopper. Vibrating feeder which is under the hopper feed the barite ore into jaw crusher. The crushed barite is lifted into the barite hopper by bucket elevator. The vibrating feed feed the crushed barite into grinding mill. The barite will be pulverized into powder. The qualified powder will be collected by cyclone and bag filter. The pneumatic conveyor will convey the powder into barite powder silo.

Barite Grinding Projects Using MTW Grinding Mills

CASE1
Model: 2 Sets of MTW175 Trapezium Grinding Mills
Raw Material: Barite
Output Size: 200 mesh D97
Application: Oil drilling mud
Location: Saudi Arabia
 

CASE2
Model: 1 Set of MTW175 Trapezium Grinding Mill
Raw Material: Barite
Output Size: 200 mesh D97
Application: Oil drilling mud
Location: Saudi Arabia
 

CASE3
Model: 1 Set of MTW175 Trapezium Grinding Mill
Raw Material: Barite
Output Size: 200 mesh D97
Application: Oil drilling mud
Location: Nigeria

CASE4
Model: 2 Sets of MTW138 Trapezium Grinding Mill
Raw Material: Barite
Output Size: 200 mesh D97
Application: Oil drilling mud
Location: Iran

2) LM Vertical Roller Mill

1 Raw Material Silo 2 Belt scale conveyor 3 Magnetic separator 4 Bucket Elevator
5 Air-lock feeder 6 LM vertical roller mill 7 Pulse Bag Filter 8 Blower
9 Belt Conveyor 10 Magnetic Separator

Flowchart Introduction:
Loader put crushed barite ore into the barite hopper. Belt scale conveyor under the hopper feed the barite ore into bucket elevator. The magnetic separator will remove out the metal from the raw material. The bucket elevator lifted the crushed barite ore into air lock feeder which will feed the barite into vertical roller mill. The qualified size powder will be collected by bag filter. Oversize material will be return to the bucket elevator by belt conveyor and ground by the vertical roller mill again. Above the belt conveyor, there is a magnetic separator.

Barite Grinding Projects Using LM Vertical Roller Mills

CASE1
LM130K Barite Powder Production Line