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Sodium bentonite
1.introduction
Bentonite is an absorbent aluminium phyllosilicate, essentially impure clay consisting mostly of montmorillonite. There are different types of bentonite, each named after the respective dominant element, such as potassium (K), sodium (Na), calcium (Ca), and aluminium (Al). Much of bentonite's usefulness in the drilling and geotechnical engineering industry comes from its unique rheological properties. Bentonite can be used in cement, adhesives, ceramic bodies, and cat litter. Bentonite is also used as a binding agent in the manufacture of taconite pellets as used in the steelmaking industry. Fuller's earth, an ancient dry-cleaning substance, is finely ground bentonite, typically used for purifying transformer oil.
2.Sodium bentonite production:
(1)Sodium base bentonite conveying equipment into the mixing system, fully even mixing materials, through the conveying system is sent to the HuaJi sodium, HuaJi sodium of bentonite were of sodium. After the sodium bentonite water cut 40%, must pass a three-channel rotary dry to get water for 10% products.(2)In the process of drying, heat transfer type hot air stove for drying of energy, high temperature flue gas purification of the hot blast stove produced in three-channel rotary dry machine and sodium base bentonite full contact, to achieve the purpose of removing moisture.
3.Sodium bentonite products specification:
Application Area | Items | Quality index |
machine casting | Wet compressive strength(Kpa) | Min.120 |
Hot wet strength(Kpa) | Min.3.5 | |
colloidindex(ml/15g) | Min.90 | |
moisture% | 8-12 | |
Absorb blue quantity(g/100g) | Min.36 | |
granularity(200mesh,100%) | Min.90 | |
drilling mud | Viscometer Dial Reading at 600 rpm | Min.30 |
Filtrate Volume | Min.15 | |
Yield Point / Plastic Viscosity Ratio ≤ | Min.1.5×pv | |
Residue Grater than 75 Micron,% ≤ | Max.4.0 | |
Moisture,% | Max.13 | |
Environmental engineering granular | Absorb blue quantity(g/100g) | Min.30 |
Filtrate Volume | Min.18 | |
Expanding times | Min.24 | |
granularity(0.2-2.0mm)% | Min.90 | |
Moisture,% | Min.12 |
4.Sodium bentonite products uses:
Sodium base bentonite is mainly used in casting sand, metallurgy, iron ore pellets adhesive, drilling mud suspension, drill solution card agent. In mechanical sand casting modelling of adhesive, its good permeability, overcome general clay, permeability is not strong. Cause casting parts produced "hole", "clip sand", "peeling" phenomenon, which will greatly reduce the casting parts of scrap, and high temperature resistant, easy to take off the sand, and greatly improve the accuracy of the casting and finish.
5.Advanced point:
We choose the high quality bentonite, After the purification, modification, processing,
developed with the bentonite for drilling mud, which quality meet international standards of OCMA and the United States API grade.
China high quality montmorillonite---sodium bentonite