Natural moulding sand contains variable amount of clay, which acts as bond between the sand grains. This sand, therefore, posse strength, plasticity and refractoriness to varying extend depending upon the clay minerals present. When it contains a greater amount of clay, it is blended with river sand, which is relatively clay free so as to get the optimum properties desired in the sand mixture.
Washed grains shall be mostly sub-angular to rounded shape. As far as possible, the sand shall be free from gravel. Natural moulding sand for use in foundries shall be of three main grades, namely, A, B and C with respect to clay content.
The vast industry experience of over 3 decades forms the foundation of our company. Established in the year 1981 by Mr. Rajnikant Doshi, our company has greatly contributed to the mineral industry by supplying and exporting a quality assured range of natural stones, minerals, ores and refractors.
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