Physical properties of Ball clay Main features include high plasticity due to fine particles which give high green strength for handling the product at the green stage. Requires much more deflocculant to get required fluidity compared to china clay because of fine particles and organic impurities.
Ball clays are kaolinitic sedimentary clays that commonly consist of 20–80% kaolinite, 10–25% mica, 6–65% quartz. Localized seams in the same deposit have variations in composition, including the quantity of the major minerals, accessory minerals and carbonaceous materials such as lignite.
Ball clay is a fine-grained highly plastic, mainly kaolinitic, sedimentary clay, the higher grades of which fire to a white or near white colour. The paper will review the origin of the term "Ball Clay" and the lo ion and origins of several deposits with particular emphasis on the mineralogical, physical and rheological properties which make the
Ball clays are an extremely rare mineral found in very few places around the world. They usually contain three dominant minerals: from 20-80% kaolinite, 10-25% mica, and 6-65% quartz. In addition, there are other 'accessory' minerals and some carbonaceous material derived from ancient plants present. The wide variation both in mineral composition
USA ball clays are acidic to neutral and UK ball clay is alkaline which is an important factor in filler reinforcement where acid/base interaction plays a key role. Phenol-formaldehyde resin was reinforced with clay. 7 Substantial increase of tensile strength and Young's modulus were obtained. 7 The peak of mechanical properties was at 5 wt% of clay addition. 7
Ball Clay Ball clay is the most common type of secondary clay.They are much more plastic than kaolin because the particle size is much smaller. Ball clays are available with a wide range of plasticities a product of varying particle sizes . They have higher iron
Ball clays or plastic clays are fine grained, highly plastic sedimentary clays, which fire to a light or near white colour. They are used mainly in the manufacture of ceramic whiteware and are valued for their key properties of plasticity, unfired strength and their light fired colour.
Ball clay is extracted using mechanical equipment, of which the most popular are hydraulic "back-hoe" excavators, that work as "benches" cut into the quarry to access the seams of clay. Individual clay selections are blended carefully according to pre-determined recipes to provide a product with a consistent and predictable range of characteristics and behavior.
Notes The term 'ball' traces to historic mining in England where large chunks of the clay were cut from the bank in ball shapes for transport to processing. There are hundreds of different ball clays available. Potentially they should vary widely in plasticity, particle size, color, and drying properties.
pressingdepends,primarily,ontheballclaycontent.Ball clays, with theirlarge drying shrinkage and highbondingpower, largelycontrolthe ability of a body tosuccessfully dry inlarge