Bentonite

Bentonite deposits are normally exploited by quarrying. Extracted bentonite is distinctly solid, with the moisture content of approximately 30%. The material is initially crushed and, if necessary, activated with the addition of soda ash (Na2CO3). Bentonite is dried (air and/or forced drying) to reach a moisture content of approximately 15%. According to the final application, bentonite is either sieved (granular form) or milled (into powder and super fine powder form) or treated with acids to produce acid-activated bentonite (bleaching earths), or treated with organics to produce organoclays. The main constituent, which is the determinant factor in the clay’s properties, is the clay mineral montmorillonite.

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Description

Bentonite is available in various grades for its diverse applications :

Foundry grade bentonite powder :
Almost all iron, steel malleable iron casting foundries are using Bentonite for cost efficient results. Bentonite is utilized in foundry to bind the sand grains into desired shapes. Bentonite helps in retaining the mechanical shape of the mould by making the particles of sands adhere to it and also making the surface impermeable. Strength and fusion point are the two important properties desired for selecting bentonite. Primary use is in the production of non-ferrous castings. Mixing ratio depends on the sand fineness and its quality, impurities, clay particles and fineness of sand will affect the Green strength properties.

Oil well drilling :
Bentonite clay is used in vertical drilling fluids to increase viscosity and filtration control. This mineral is also ideal in drilling fluids because it expands when exposed to water. This expansion helps down hole formations to be sealed from invading drilling fluids. The Drilling bentonite extracts the drill cuttings from around the drill bit, which are then floated to the surface. Bentonite also serves to cool and lubricate the drill bit as well as seals the drill hole against seepage and to prevent wall cave-ins. It is mainly use in fresh pure water rotary drilling conditions as water quality will affect bentonite performance. The quantity of bentonite used is variable depending upon the depth of the hole to be drilled. Generally one tonne of bentonite is used to prepare about 100 barrels of mud.

Civil engineering and pilling grade :
Bentonite in civil engineering applications is traditionally used as a thixotropic, support and lubricant agent in diaphragm walls and foundations, in tunneling, in horizontal directional drilling (HDD) and pipe jacking. Due to its viscosity and plasticity, is also used in Portland cement and mortars.

Iron ore palletizing Grade Bentonite :
Our IOP grade bentonite is extraordinary solution for Iron Ore Pellet binding and it can also withstand higher temperature since it contains more percentages of metal. The grade is also having higher natural percentage of Iron which is ideal in isolating ore pellets with the maximum percentages of Iron. The Iron Ore Pelletization plant is able to maintain active clay levels with reduced additions of Bentonite. Since IOP grade bentonite is having high Mont values, it offers more superior thermal durability.

Activated Bleaching Earth/Fullers earth :
It is used as a bleaching agent, as an adsorbent in decolorizing and used for refining oils and fats. Fuller’s earth is a mineral substance characterized by the property of absorbing basic colors and removing them from oils. In general Bleaching Earth is a decolorizing agent which will change the tint of any coloured oil to a lighter shade by changing the basic colour units in oil, without altering the chemical properties of the oil. Bleaching Earths are special clays activated by physical or chemical processes. Natural clays are found in special strata and are subjected to various processes such as desegregation in water, treatment by sulphuric acid solutions, filtration, baking, grinding, etc. The efficiency of bleaching earth depends on selecting the right grade and proper blends of the basic raw material Bentonite. The major uses of Fuller’s Earth are for decolorizing petroleum oils, edible oil, vegetable oil, beer, the recycling of used lubricating (Engine) oil, fats, greases, paraffin waxes and solvents. It is also used in cosmetics, face pack, and for making masks.

Cat litter grade :
Bentonite is an ideal for natural cat litter. The characteristics of the materials are such that they have high absorption, instant strong clumping, natural odor control, safe, hygienic, low dust no waste materials.

Electrical Earthing :
Bentonite is widely accepted for the purpose of improving ground conductance in electrical earthing.

Pharmaceuticals :
Bentonite is used as filler in pharmaceuticals and due to its absorption/adsorption functions, allows paste formation. Such applications include industrial protective creams, calamine lotion, wet compresses, and anti-irritants for eczema. In medicine, bentonite is used as an antidote in heavy metal poisoning. Personal care products such as mud packs, sunburn paint, baby and face powders, and face creams may all contain bentonite.

Detergents :
Laundry detergents and liquid hand cleansers/soaps rely on the inclusion of bentonite, in order to remove the impurities in solvents and to soften the fabrics.

Other Usages :
Water impedance : As a barrier for Wine Clarification, Pond sealing, Wine and Juice clarifying agent.
Cements, ceramics plasters : As a plasticizing agent.
Insecticides : As a carrier.
Insulation : As a binder.
Porcelain : As a suspending agent.
Sewer pipes : As a lubricant and sealant.

Note :

Specifications and chemical analysis can be furnished only when we get to know the grades/applications desired by you.

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