The,classification,and,identif business, insurance The classification and identify of scrap nickel
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Nickel withmagnetic at room temperature, but when it heated to 350°C, the magnetic disappeared. Nickel has widely use,plating it to other metal products, can prevent surface corroding, such asmedical and surgical appliances, in order to facilitate disinfection, the surfacewere coated nickel. Nickel is also used to prepare a variety of alloys, such asa variety of high-alloy nickel-containing stainless steel, heat resistant steel(high-temperature steel), precision alloy, permanent magnets and nickel-containinglow alloy steel. Nickel is also commonly used for the preparation of variousnickel-based alloy, copper-based alloy and heat-resistant alloy, it has a highdegree of process performance and extremely valuable physical and chemicalproperties, high heat-resistance, high corrosion resistance and good plasticity,is a kind of indispensable raw materials for telecommunications appliances,instrumentation, medical industry, metal powder industry, chemical industry.Scrap nickel classification is dividedaccording to the nickel-containing ingredients, can generally be divided intothree categories. The nickels class, There are two kinds. One nickel issued bythe Chinese government in the 1920s, is generally used to call the old nickels,this nickels nickel content is about 95%, light side, white color, can beattracted by magnet. Another nickel was issued by Yunnan,Chinain the 1930s, generally call it the new nickels. This kind of nickel containsabout 20% of nickel. The new nickels mainly contain copper, can not beattracted by magnet, the social stock is running out.Pure nickel, pure nickel is not accompaniedby any other metals nickel sheet, bar, ingot, nickel powder, etc., pure nickelsnickel content is between 97%-99%, its feature is silver-white, slightly with lightgreen, shiny, magnetic, can be attracted by magnet, soft and tough, fineinternal organization, close structure. Pure nickel is mainly derived from theproducers who use nickel as raw materials.Hetero nickel, hetero nickels species isactually more complex, in fact, it is a nickel alloy containing more than 25%of nickel. Including the nickel-iron alloys, nickel-chromium alloys,nickel-chromium-iron alloy, nickel-chromium-tungsten alloy, molybdenum-ironalloy, nickel-copper alloy, nickel-copper-iron alloy, nickel-copper-manganesealloy and so on. The identification methods of nickel waste miscellaneous, cantake the approach of grinding sparks, grinding the sample in the fast grindingwheel, watching the sparks to determine what kind of alloy. Also can take the chemicalqualitative method, place the sample in test tubes, injecting a dissolvingagent aqua regia and dissolved to observe the color to determine what kind ofalloy. Nickel wire, nickel powder, nickelplate, nickel belt in telecommunications equipment, electroplating factorys leftovernickel head, nickel plate and so on. The surface is silvery white, slightlygreenish after oxidation, grinding with a grinding wheel, show up fuchsiaspark, shorter flames; can be attracted by magnet.The utilization of scrap nickel, a purenickel scrap excluding other alloys, can be directly used for the raw materialsfor various industrial or smelting nickel alloy plating. Waste hetero nickel(including old and new nickel coin), if can clearly identify it belong to whichalloys, it still can be used in smelting the same grade alloy; can not distinguishgrades, also not contain cobalt, copper, tungsten, molybdenum and otherelements, can be used as raw materials of smelting nickel-chromium stainlesssteel; if the composition is very complex, can be used as raw material ofrolling drum. A nickel-containing waste water, waste residue, garbage mud, etc.can be extracted nickel oxide, nickel chloride, nickel nitrate, nickel sulfate,nickel hydroxide nickel and a variety of chemical raw materials, but theextraction process is more complicated, stronger technicality, higher cost.Source:http://www.mhcmp.com
The,classification,and,identif