The development trend of Ye Lashi
The development and utilization of pyrophyllite ore is the development trend of enterprise scale, product grade, refractory material company, the annual output of 100 thousand tons of pyrophyllite ore, pyrophyllite powder 10 thousand tons, 10 thousand tons of refractory brick production plant. Japan quality and leaf wax content and yield were higher, about half of products used for refractory material. If the company has an annual output of 20000 tons of products used in the production of pyrophyllite ore dressing plant, paper coatings, medicine, agriculture, glass and ceramics, refractory material.
Ye Lashi is a crystalline structure. It belongs to layered silicate minerals. Its crystal structure is composed of two layers (Al-O, OH) and eight layers in the middle layer of the upper and lower layers (Si-O) and tetrahedral layers. The structure Al2[Si4O10] (OH) 2, the experimental formula is Al2O3 - 4H2O, the chemical composition theory of Al2O328.3%, SiO266.7%, H2O 5%, nature rarely see pure pyrophyllite, often associated with various impurities. Ye Lashi crystal is monoclinic, usually flake, radial aggregates, with pearly iridescence or aphanitic scaly dense block, usually white, light yellow or light green, white streak, vitreous luster, from pearl luster, waxy luster to dull, supple, with greasy feeling, the bulk density of 2.75 ~ 2.80g/cm3, Mohs hardness of 1.5 ~ 2. In 600 ~ 700 degrees have a balanced endothermic Valley to 1000 DEG C has no exothermic peak, this is because the pyrophyllite dehydration after the structure is not damaged, no crystallization of new and with reason.
The main products: the characteristics and application of pyrophyllite line expansion coefficient is small, not before sintering in a certain temperature range (1050-1150 C) will produce line expansion, can offset the embryo in the firing caused by other materials in the process of contraction and expansion of this line, and on the firing range, ensure product size consistent. Ye Lashi has good thermal stability and very little moisture expansion, and can therefore be used to produce products of accurate size and good thermal stability.Properties and process trends
