China Drying Network Information Industry and Information Technology Department issued the “Environmental Access Conditions for Rare Earth Industries†and “Interim Measures for the Administration of Access Notification for Rare Earth Enterprisesâ€. It provides the basis for carrying out work such as investment approval (registration) management, land and resources management, environmental impact assessment, credit financing, and safety supervision for rare earth construction projects. It will be implemented on July 26, 2012. The "Entry Requirements" requires that rare earth mine development, smelting and separation, and metal smelting projects should meet the requirements of relevant national laws and regulations, in line with national and local industrial policies and related development plans. Mining rare earth mineral resources shall obtain mining licenses and safe production licenses according to law. Mining enterprises should strictly carry out mining in accordance with the approved development and utilization plans and mining plans. It is strictly forbidden to use unlicensed, cross-border exploitation and use of mining ore dressing technologies that will damage the environment and waste resources. Rare earth mine development, smelting and separation, and metal smelting are state-restricted investment projects, and production can only be established after approval. In terms of production scale, the production scale of mixed rare earth mining enterprises should not be less than 20,000 tons/year (calculated on the basis of oxides, the same below); the production scale of fluorocarbon antimony mining enterprises should not be less than 5,000 tons/year; ion-type rare earth mines The company's production scale should not be less than 500 tons/year. It is forbidden to mine a single mine. The production scale of independent smelting and separating enterprises using mixed rare earth minerals shall not be less than 8,000 tons/year; the production scale of independent smelting and separating enterprises using cerium lanthanum ore shall not be less than 5,000 tons/year; and independent smelting using ionized rare earth ore The production scale of the separation enterprise should not be less than 3,000 tons/year. The production scale of rare earth metal smelting enterprises should not be lower than 2,000 tons/year. Tungsten Carbide Roll Rings, also known as hard alloy roller ring, has been widely used in the rolling production of high-speed wire, bar, threaded steel, seamless steel pipes, etc. due to its good wear resistance, high-temperature hardness, heat fatigue resistance, thermal conductivity, and high strength. Tungsten Carbide Sleeve,Tungsten Carbide Roller, Steel Rebar Rolling,Steel Wire Rod Rolling,WC Roller Luoyang Golden Egret Geotools Co., Ltd , https://www.xtchvof.com
The Tungsten Carbide Roll Rings we produce mostly come in two series: WC Co and WC Co Ni Cr, with Co and Co Ni Cr as binders ranging from 6wt% to 30wt%. From a usage perspective, hard alloy rollers have good comprehensive mechanical properties, with a bending strength of over 2200 MPa and an impact toughness of (4-6) × At 10 ^ 6J/m ^ 2, the Rockwell hardness (HRA) can reach 78~90. During the high-speed wire rolling process, the single groove steel passing amount is much higher than that of cold hard cast iron or high-speed steel rollers.