Calcium Bentonite Processing Plant crushing business

Bentonite is a smectite clay formed from the alteration of siliceous, glass-rich volcanic rocks such as tuffs and ash deposits. The major mineral in bentonite is montmorillonite, a hydrated sodium, calcium, magnesium, aluminum silicate. The sodium, calcium, and magnesium cations are interchangeable giving the montmorillonite a high ion exchange capacity. The industrial bentonites are generally either the sodium or calcium variety. Bentonites are important and essential in a wide range of markets including drilling mud, foundry sand binding, iron ore pelletizing, pet waste absorbents, and civil engineering uses such as waterproofing and sealing. Bentonites have excellent rheological and absorbent properties. Sodium bentonite has a high swelling capacity, and forms gel-like masses when added to water.best stone crushing business plant in india Calcium bentonite has a much lower swelling capacity than sodium bentonite but this can be improved by treatment with soda ash to produce sodiumexchanged bentonite. Normally these sodium exchanged bentonites do not have as high swelling capacity as the natural sodium bentonites.

The largest sodium bentonite deposits are located in the Western United States in Wyoming, Montana, and South Dakota. These sodium bentonites are also called Western or Wyoming bentonite which means a high swelling sodium bentonite. Other smaller sodium bentonite deposits occur in Argentina, Canada, China, Greece, Georgia Republic, India, Morocco, South Africa, and Spain. Calcium bentonite deposits are much more common than sodium bentonite ones. In the United States calcium bentonites occur in Georgia, Alabama, Mississippi, Texas, Illinois, and Missouri. Elsewhere calcium bentonites occur in England, Germany, Spain, Italy, Greece, Turkey, Georgia Republic, Czech Republic, Ukraine, Japan, Algeria, Morocco, South Africa, China, India, Japan, Argentina, and Brazil. Bentonite has several important physical and chemical properties which make it important in a wide range of markets. In addition to its rheological and absorbent properties, bentonite has excellent plasticity and lubricity, high dry bonding strength, high shear and compressive strength,stone crushing manufacturing machines suppliers good impermeability and low compressibility. In recent years the largest market for bentonite has been absorbent pet litters. Traditional pet litter is a granular calcium bentonite but in the past 10 years a scoopable product line has been introduced. By adding sodium bentonite to the granular calcium bentonite the litter clumps when wetted and these hard clumps can be easily removed from the litter box. Currently the largest market for sodium bentonite is scoopable pet litter, which in the US amounts to over one million tons. White bentonites are rare and are usually a calcium variety. About 150,000 tons of white bentonite is consumed annually for niche markets including detergents, ceramics, paper, cosmetics, paint, and wine clarification. White bentonite occurrences are in Texas and Nevada in the US, Greece, Turkey, Italy, Morocco, and Argentina.

The FOB price of most bentonites is very low ranging from $35 to $110 per ton. White bentonites, depending on their purity, range in price from $200 to $1,500 per ton. Two value added products are processed, one from sodium bentonite and one from calcium bentonite. Organoclays are produced using sodium bentonite as the base. Organic compounds are reacted with the high exchange capacity sodium bentonite where the organic is exchanged for the sodium. Organoclays are used in oil base paints, in high temperature grease, in oil base drilling muds, and several other niche markets. The price of organoclays ranges from $1,500 to $4,000 per ton. Calcium bentonite is acid activated to produce bleaching clays which are used to clarify edible oils and beverages. Acid activation increases the surface area and pore volume thus improving the clay=s performance in removing color bodies and impurities from liquids. stone crushing projects for south africa The total world volume of the bleaching clay market is estimated at about 850,000 tons. The price ranges from $250 to $600 per ton. A potential new value added growth market for montmorillonites is nanoclays. A nanoclay is clay having nanometer-thick platalets that can be chemically modified to make the clay complexes compatible with organic monomers and polymers. The properties of a polymer, which limits its use, are stiffness and /or strength in durable applications and gas barrier performance in packaging materials. Heat distortion temperature is also a limiting factor for polymers in many products. All the above properties can be significantly improved through the use of nanoclays. The market potential for nanoclays is very large.