API13A. Drilling Grade Barite Specification and Zenith MTW Mill
Grade: Drilling Grade
Product Description: API Specification 13A – 7.1.1
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.
Product Physical Requirements: API Specification 13A – 7.1.2
Drilling-grade barite shall be deemed to meet the requirements of this International Standard if a composite sample representing no more than one day’s production conforms to the chemical and physical specifications of Table 2, represents the product produced and is controlled by the manufacturer.
Manufacturer Certificate Documentation: API Specification 13A – 7.1.1
The manufacturer shall retain certificates of analysis or similar documentation on these commercial barium sulfate ores.
Barite physical and chemical requirements
|Density||4,20 g/ml, minimum|
|Water-soluble alkaline earth metals, as calcium||250 mg/kg, maximum|
|Residue greater than 75 µm||Maximum mass fraction 3,0 %|
|Particles less than 6 µm in equivalent spherical diameter||Maximum mass fraction 30 %|
Shanghai Zenith Grinding Mill Solution: MTW Trapezium Mill