An organic-rich high-plasticity clay ball clay, named in the United Kingdom. Originally mined in the United Kingdom, for easy carriage shipment, its plasticity, scroll it into a rough ball, hence the term. The origin of the world famous ball clay is in southwest England, South Devon, North Devon and of Dorset. According to the study, these areas of ball clay is formed in the Eocene and Oligocene sedimentary deposits (secondary clay deposit). Mainly by disordered kaolin, quartz, mica and other minerals associated organic matter content of up to 15%, the main chemical ingredient is SiO2, Al2O3, H2O, H2 and a small amount of Fe2O3, TiO2, Na2O, K2O. The wide variety of colors, black, gray. After calcination, with different impurity content was white, yellow, ocher and other soft, sticky, it is important combination of clay in the ceramic industry. According to the mineral component, ball clay essentially kaolin special species, because it has a unique purpose, and therefore the ceramics industry in Europe and the United States, it is called a special nature of the clay terminology. Ball clay in the composition and physical properties of the knots soil and refractory clay (soft), similar to China's Hunan Hongjiang produced in granite the white globular kaolin, do not fall in the areas of species commonly known as ball clay. Refractoriness of ball clay, usually in the 1610-1770 ° C, the refractory industry in ramming materials, casting materials and plastic can be a lot of ball clay.