(1) the general category of quartz sand coated sand, thermoplastic phenolic resin, methenamine and calcium stearate, without concerning additives. Generally applicable to the production of cast iron. (2) high-strength low gas class ordinary coated sand coated sand replacement products, by adding additives and use of new technology related to the preparation, its strength is higher than 30% more than ordinary coated sand, gas evolution was also significantly reduced, for the production of complex precision iron castings. Handmade wet coated sand: the coated sand wet compressive strength can be adjusted within 0.1-0.3MPa. Stored for more than three months clay sand reclamation factory for hand-shape or core system (similar to tung oil sands Hop fat sand), at room temperature, after stripping, the type (core) in a heated oven or oven, heating temperature 250-350 ℃, heating time 3-10min, type (core) after curing with high intensity, low-fat volume, a small amount of creep-shaped, non-hygroscopic characteristics. The coated sand suitable for single pieces and small batch production of high precision casting, particularly suitable for township enterprises to adopt. It is noteworthy that the clay sand regeneration in type (core) heat curing Shandong clay sand reclamation must wait oven reaches the desired temperature can be placed in a heating, avoid heating furnace with heating (1) the general category covered by sand quartz sand, a thermoplastic phenolic resin, methenamine, and calcium stearate, without relevant additives. Generally applicable to the production of cast iron. (2) high-strength low gas class coated sand coated sand ordinary clay sand reclamation replacement products supplier, by adding additives and use of new technology related to the preparation, its strength than ordinary coated sand high above 30% hair volume was significantly reduced for the production of complex precision iron castings. Clay sand reclamation line _ _ clay sand reclamation provided by Qingdao Heng Heng Machinery Co., Ltd. Qingdao. Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) strong, credible, Shandong Qingdao Cleaning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qingdao Heng and you hand into the brilliant, for a better future!