Bentonite is actually a rock formed of extremely colloidal and plastic clays composed primarily of montmorillonite, a clay mineral of the smectite group, and is produced by in situ devitrification of volcanic ash. In addition to montmorillonite, bentonite could contain feldspar, cristobalite, and crystalline quartz. The special properties of bentonite are an ability to form thixotrophic gels with water, an ability to absorb huge quantities of water, and a high cation exchange capacity. The properties of bentonite are derived from the crystal structure of the smectite group, which is an octahedral alumina sheet in between two tetrahedral silica sheets. Variations in interstitial water and exchangeable cations in the interlayer space impact the properties of bentonite and therefore the commercial makes use of of the different forms of bentonite. By extension, the term bentonite is applied commercially to any clay with similar properties. Fuller’s earth is frequently a bentonite.
Kaolin or china clay is a mixture of various minerals. Its main component is kaolinite; additionally, it frequently consists of quartz, mica,feldspar, illite, and montmorillonite. Kaolinite is made up of tiny sheets
The primary components of typical clay and shale are illite and chlorite. Illite is also a component of ball clays. Illite closely resembles micas, however it has less substitution of aluminium for silicon and/or partial replacement of potassium ions between the unit layers by other cations, like hydrogen, magnesium, and calcium.
Quantitative measurement of airborne dust containing aluminosilicates is most typically gravimetric. The techniques utilized for the identification and quantification of aluminosilicates include X-ray diffraction, electron microscopy, energy-dispersive X-ray analysis, differential thermal analysis, electron diffraction, and infrared spectroscopy.
Grinding mill used for bentonite processing plant
Ball mill for bentonite grinding plant: Ball mill is used for grinding bentonite into powder in bentonite processing plant. It is an excellent tool to select mine or grind a variety of mine and other materials into fine powder. Ball Mill integrates such features as: low cost, low energy consumption, excellent durability, stable performance, easy and safe to operate.
Raymond mill for bentonite powder plant: Raymond Mill is used as bentonite pulverizing mill in manufacturing process of bentonite powder. Vipeak raymond mill is a new machine which can be used for milling fineness and ultra-powder. Moreover the size of finished product can be regulated between 325-2500 mesh.
Bentonite processing plant
Generallly, bentonite is grinded into powder with 100 mesh, 150 mesh, and 200 mesh in the manufacturing process of bentonite powder.
There are two methods of bentonite processing.
The dry process: bentonite – picking – drying – crushing – drying – grinding – classification – packing.
The wet process: pulping – degritting - classification – dehydration – drying – grinding – packing.
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