Main uses \ x0d \ x0d \ 1) Metallurgical industry: mainly used for manufacturing refractory materials-silicon bricks, smelting silicon alloys (ferrosilicon, silicomanganese and silicochromium) and as flux. Pure crystalline silicon. Crystalline silicon is the main raw material for producing monocrystalline silicon, and it can also be used for producing silicon, aluminum and silicone. \ x0d \ x0d \ 2) Glass industry: it is the main raw material for making glass. It can be used to manufacture all kinds of flat glass, laminated glass, embossed glass, insulating glass, foam glass, glass brick, various packaging bottles, bottles and cans, beer bottles, glasses, thermos bottles and other glassware and decorations, and can be used to manufacture optical glass, glass instruments, glass fibers and conductive glass. Glass is inferior to special radiation-proof glass. It can also be made into refractory bricks for lining glass melting furnaces. \x0d\\x0d\3) Construction industry: it can be used as an important building cornerstone. Gravel can be used as road filling stone and railway ballast. The mixture of sand and asphalt can pave the road, and can also be used as the correction material of Portland cement. It can also be used as sand cement ingredients, aerated concrete, common products and so on. \x0d\\x0d\4) Chemical industry: Silicon dioxide can be used to make various silicides, silicates and nitrates, and the good quality can be used as the filler of acid-resistant sulfuric acid tower. It can also make water glass, silica gel, desiccant and petroleum refining catalyst. Manufacturing exterior wall coatings, road marking coatings, etc. \x0d\\x0d\5) Grinding industry: Quartzite and timely sandstone can be used to make grinding materials such as grindstone, oilstone, sandpaper and silica sand; Quartz sand is also used for sawing stones, polishing glass, grinding the surfaces of metal products and stone products, and polishing jewelry when necessary. \x0d\\x0d\6) Other industries: It can be used as raw materials for enamels and ceramics. Pure quartzite is widely used in radio industry, ultrasonic technology, modern national defense and cutting-edge technology. Pure quartzite has optical rotation and ultraviolet transmittance, and can be used to manufacture various optical instruments and medical quartz lamp. It is also the basic raw material for manufacturing emery (silicon carbide). Fine quartz sand can be used for filtration. \ x0d \ x0d \ timely sandstone, the main component of which is timely, with a density of 2.65g cm2 and a Mohs hardness of 7, has a crystal system of 60,000, and its appearance is white, bluish gray and grayish white. Mainly used in glass products, foundry industry, metallurgical industry, ceramic uranium surface, refractories, cement industry, chemical industry and so on. Uses of quartz powder: used in the glass industry, it can make all kinds of flat glass, laminated glass, embossed glass, insulating glass, foam glass, glass brick, all kinds of packaging bottles and jars, glassware such as beer bottles, glasses, thermos bottles and decorations, and can make optical glass, glass instruments, glass fibers, conductive glass and glass inferior to special radiation-proof glass. Molding sand for foundry industry. Metallurgical industry can be used as smelting additive, flux and various ferrosilicon alloys. Refractory industry can be used as refractory for high temperature bricks, ordinary bricks and kilns. The cement industry can be used as cement ingredients, aerated concrete and common products. The chemical industry can manufacture water glass, silica gel, desiccant and petroleum refining catalyst. Manufacturing exterior wall coatings, road marking coatings, etc. \ x0d \ x0d \ quartz sand is an important industrial mineral raw material, which is widely used in glass, casting, ceramics and refractories, metallurgy, construction, chemical industry, plastics, rubber, abrasives and other industries. Uses: Main raw materials for flat glass, float glass and glass products (glass jars, glass bottles, glass tubes, etc.). ), optical glass, glass fiber, glass instrument, conductive glass, glass cloth, radiation-proof special glass, etc. And refractory porcelain blanks and glazes, raw materials such as high-silica bricks, common silica bricks and silicon carbide for kilns, raw materials or additives such as metallurgical metal silicon, ferrosilicon alloy and silicon-aluminum alloy, building concrete with flux, cementing materials, road building materials, artificial marble, cement physical performance testing materials (namely cement standard sand) and the like. \ x0d \ quartz sand (powder) series powder is made of high-purity crystalline silicon dioxide by washing or pickling, grinding, drying and grading. The function of X0d\ timeliness in ceramic products \ x0d \ 1. Timely is an important poor raw material in ceramic tiles. Its introduction can reduce the drying shrinkage and deformation defects of the product blank, help speed up the drying process and save the process time. \x0d\ \x0d\ 2. Polymorphic transformation and volume expansion occur at high temperature in time, which can partially reduce the shrinkage of the green body in the firing process and reduce the stress caused by excessive firing shrinkage, thus improving the firing performance of the product. \ x0d \ \ x0d \ 3。 In the firing process, a part of it is dissolved in the feldspar glass liquid, which can improve the viscosity of the glass liquid, and the surplus can form the skeleton of the green body in time. This not only makes the blank have the ability to resist deformation at high temperature, but also increases the physical strength of the product. \x0d\ II。 Clinker as a barren raw material \ x0d \ x0d \ Clinker is to calcine some natural mineral raw materials at high temperature in advance to reduce shrinkage, increase strength, partially change its physical and chemical properties, and improve and improve technological performance. For example, kaolin series raw materials can be calcined at high temperature to generate mullite crystals; Calcination of talc raw materials can form cordierite crystal substances; After some clay raw materials are calcined into mature materials, due to excessive organic impurities, a large number of gases are eliminated in the firing process, which eliminates hidden dangers, effectively ensures the speed of accelerating the new low-temperature rapid firing process, and is of great significance to improving product quality and firing efficiency. After the clay raw material is processed into mature material, the crystal water and organic matter contained in it are eliminated, thus losing plasticity and causing volume shrinkage. When calculating the formula, its chemical composition is equivalent to removing the loss on ignition from the original composition. \x0d\ \x0d\ Now many ceramic construction enterprises grind the fired ceramic tile waste and add it to the green body according to a certain proportion, which can also achieve the barren effect. This method does not affect the chemical composition of the product, and it is also an economical and reasonable method. However, the addition amount depends on the specific conditions of each enterprise's technological process, and the proportion of waste blanks and the plastic requirements of blanks must be considered. In the enterprises producing colored glazed tiles, the glaze on the waste will lead to unstable sintering performance due to the special chemical composition of the liquid phase, so attention should be paid to the ingredients. At present, the introduction amount of green fired waste blank in ceramic tile batching can be controlled within the range of 5%- 15%. In a word, waste materials occupy a very important position in the production process of ceramic tiles, which can not be ignored. \x0d\ III。 Present situation of clinker research abroad \ x0d \ x0d \ At present, some ceramic construction enterprises in Europe and Japan have brought the full development and utilization of geological inferior raw materials and the comprehensive utilization of municipal waste and construction waste into the field of ceramic products production for the purpose of environmental protection and saving the earth's high-quality raw materials. Many inferior raw materials and wastes are calcined at high temperature to remove organic matter and harmful impurities, become usable clinker, and then added to the blank formula as waste materials. At present, with the continuous improvement of high-temperature rapid sintering technology, the sintering temperature has been greatly reduced, so the range of barren raw materials that can be selected has a tendency to expand. It is in this context that developed countries have accelerated the development and utilization of new barren raw materials and achieved great results.