The basic principle is to use thermal regeneration of old sand boiling thermal pretreatment and regeneration furnace equipment, the first of the old sand crushing and magnetic separation vibration, then fired in boiling regenerative furnace, sand and then through the insulation, cooling, Screening can be reused. After recycling the regenerated sand thermal performance up: loss on ignition (mass fraction) <0.3%; particle concentration ratio (mass fraction) 80-90%; gas evolution <3mL / g. In order to ensure quality resin coated sand core sand regeneration, we must first ensure that the quality of coated sand, sand covered a variety of performance indicators must meet production requirements, the test method can be found in the machinery industry standard (JB / T8583.1997 casting coated sand). Sand type of iron technology first developed in the small and medium enterprises in the casting up and successfully applied. The late 1970s, China's first iron built with Sand casting production lines. 80 years later, China's iron-type cladding sand casting process and application of basic research enterprises have formed teams and get faster development. At present, China has hundreds of companies with Sand cast iron used in production, with an annual output of iron with Sand casting about 100,000 tons (mainly crankshafts, camshafts, gears and export castings, etc.), the annual consumption of coated sand approximately 20,000 tons. A former sand, constitute the main body of the original sand-coated sand, sand the original requirements are: high refractoriness coated sand resin sand production line of renewable, low volatile matter, high strength resin sand particles themselves recycling equipment, generally used in natural silica sand This is mainly due to its abundant, cheap, and can meet the casting requirements. Only the special requirements of the casting was made of special sand (such as zircon sand, chromite, ceramic sand, magnetic iron ore, etc.) as the original sand coated sand: General requirements for silica sand is: A.SiO2: cast iron and non-ferrous casting require more than 90% sand, castings require more than 98%. B. acidic than alkaline sand sand. C. clay content <0.3%. D. Particle size distribution: 3 screen should adopt centralized, 5 sieve dispersion. E. grain shape: round good choice as silica sand, angular coefficient should generally be less than 1.3. Usually by two sand scrub to meet the requirements, but in order to improve the performance of coated sand, silica sand can be pickled or active treatment temperature (900-1200 ℃ roasting). Resin sand reclamation equipment, Qingdao Heng (certified), resin sand regeneration provided by Heng Machinery Co., Ltd. Qingdao. Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) is Qingdao, cleaning, cleaning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qingdao Heng led the staff warmly welcome all inquiries negotiations to create a better future Qingdao Heng.