Nirmal Exports

Gandhidham, Kutch, Gujarat

With the assistance of our capacious warehouse and sophisticated inventory system, we are able to meet the bulk as well as urgent requirements of the clients. Moreover, our experts keep a stringent check on the safety of the products. We have a wide supply chain network that enables us to make delivery of consignments within the stipulated time.

Details :

• Feldspar is generally used for ceramics, glass, electrodes.
• Potash Feldspar Powder is used in making the body composition of several types of porcelain, china and earthenware and also in the preparation of glazes and enamel.
• Also, it is an important ingredient in the glass sand batch.

Calcium bentonite is a usefuladsorbentof ions in solution, as well as fats and oils. It is the main active ingredient offuller's earth, probably one of the earliest industrial cleaning agents.

Calcium bentonite may be converted to sodium bentonite (termed sodium beneficiation or sodium activation) to exhibit many of sodium bentonite's properties by anion exchangeprocess. In common usage, this means adding 510% of a soluble sodium salt such assodium carbonateto wet bentonite, mixing well, and allowing time for the ion exchange to take place and water to remove the exchanged calcium. Some properties, such as viscosity and fluid loss of suspensions, of sodium-beneficiated calcium bentonite (or sodium-activated bentonite) may not be fully equivalent to those of natural sodium bentonite. For example, residual calcium carbonates (formed if exchanged cations are insufficiently removed) may result in inferior performance of the bentonite in geosynthetic liners.

Uses : The main uses of bentonite are for drilling mud, binder (e.g. foundry-sand bond, iron ore pelletizer), purifier, absorbent (e.g. pet litter), and as a groundwater barrier. As of around 1990, almost half of the US production of bentonite was used for drilling mud.

• Drilling mud : Bentonite is used indrilling fluidsto lubricate and cool the cutting tools, to remove cuttings, and to help prevent blowouts.Much of bentonite's usefulness in the drilling andgeotechnical engineeringindustry comes from its uniquerheologicalproperties. Relatively small quantities of bentonite suspended in water form a viscous, shear-thinning material. Most often, bentonite suspensions are alsothixotropic, although rare cases ofrheopecticbehavior have also been reported. At high enough concentrations (about 60grams of bentonite per litre of suspension), bentonite suspensions begin to take on the characteristics of agel(a fluid with a minimum yield strength required to make it move). So, it is a common component ofdrilling mudused to curtaildrilling fluid invasionby its propensity for aiding in the formation ofmud cake.
• Binder : Bentonite has been widely used as a foundry-sand bond in iron and steel foundries. Sodium bentonite is most commonly used for large castings that use dry molds, while calcium bentonite is more commonly used for smaller castings that use "green" or wet molds.Bentonite is also used as a binding agent in the manufacture of iron ore (taconite) pellets as used in the steelmaking industry. Bentonite, in small percentages, is used as an ingredient in commercially designed clay bodies and ceramic glazes. Bentonite clay is also used inpyrotechnicsto make end plugs androcket engine nozzles.

The ionic surface of bentonite has a useful property in making a sticky coating on sand grains. When a small proportion of finely ground bentonite clay is added to hard sand and wetted, the clay binds the sand particles into a moldable aggregate known asgreen sandused for making molds insand casting. Some river deltas naturally deposit just such a blend of clay silt and sand, creating a natural source of excellent molding sand that was critical to ancient metalworking technology. Modern chemical processes to modify the ionic surface of bentonite greatly intensify this stickiness, resulting in remarkably dough-like yet strong casting sand mixes that stand up to molten metal temperatures.