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Reduced intermediate product for ferro-nickel mfr. - from nickel contg., iron rich material and calcined crushed nickel magnesium silicate ore
Reduced intermediate product for ferro-nickel mfr. - from nickel contg., iron rich material and calcined crushed nickel magnesium silicate ore
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机译:减少了镍铁制造商的中间产品。 -由含镍,富含铁的物料和经煅烧压碎的硅酸镍镁矿石制成
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摘要
The calcination is carried out at 500-800 degrees C and the calcined ore is slurried in water. A CO2-contg. gas is passed through the slurry (the CO2 partial press =1 atm), whereby the magnesium component is dissolved. The slurry is filtered; the filtrate is heated to ppte. MgCO3, which is subsequently decomposed to MgO and CO2. - The SiO2- rich residue contg. some nickel is mixed with the NiO-contg. iron-rich material, and the mixt. is heated in a CO/CO2-contg. atmos. (CO/CO+CO2=1-90%) to produce fayalite and a fayalite-forsterite solid soln. - The intermediate product obtained in this way is esp. suitable for selective reduction of NiO, because fayalite is highly resistant to reduction. Therefore, the reduction yields a Ni-rich ferronickel. The use of a nickel magnesium silicate ore increases the nickel content of the product.
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机译:煅烧在500-800℃下进行,并且将煅烧的矿石在水中制浆。二氧化碳排放量气体通过浆料(CO2分压> = 1 atm),从而溶解了镁成分。过滤浆液;将滤液加热至ppte。 MgCO3,其随后分解为MgO和CO2。 -富含SiO2的残留物(续)。一些镍与含NiO的混合物混合在一起。富含铁的材料和混合料。在一氧化碳/二氧化碳中加热。大气(CO / CO + CO2 = 1-90%)来生产铁橄榄石和铁橄榄石-镁橄榄石固溶体。 -以这种方式获得的中间产物特别是。适合铁氧体的选择性还原,因为铁铝沸石对还原具有很高的抵抗力。因此,还原产生富Ni的镍铁。硅酸镍镁矿石的使用增加了产品的镍含量。
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