Fine Grinding Solutions
Barite or Barium Sulfate (BaSO4) is the primary, naturally occurring, barium-based mineral. It has a high specific gravity of 4.50. Its Mohs hardness is 3.0 to 3.5. Barite’s high density and chemical inertness make it a useful mineral for a variety of applications.
The very nature or crystalline structure of barite makes it an ideal fine grinding application for Raymond® roller mills. Since the material is so firm and dense, preparation of the feed is important. In general, the top size should preferably be no more than 1/2” to the mill.
The initial moisture of raw barite can be 5 to 6% or greater, which can cause material handling challenges. As such, many barite grinding installations are set up with heat to dry and grind in one operation.
The overwhelming majority of the barite that is mined is used by the petroleum industry as a weighting material in the formulation of drilling mud. Barite increases the hydrostatic pressure of the drilling mud allowing it to compensate for high-pressure zones experienced during drilling. The softness of the mineral also prevents it from damaging drilling tools during drilling and enables it to serve as a lubricant.
The American Petroleum Institute (API) has established specifications for the use of barite in drilling mud. Barite for this purpose is usually ground to 97% thru a 200 mesh screen (74 micron).
The primary countries in which commercial deposits of barite are currently found are the United States, China, India and Morocco.
For more information on Raymond® roller mills, including nominal capacities, airflows, power requirements and water evaporation download the datasheet below.