| The nickel plays a major role in the human material civilization, and has already been utilized as the alloy. But it has discovered only more than 200 years. The nickel smelting industry developed rapidly after human found nickel oxide ore with Ni content of 7~8% in New Caledonia in 1865, and found it could improve the property of steel. There are the main producing countries in Russia, Canada, Japan, Australia, and so on. In china the nickel industry flourishing development is at the end of 1950's after discovering Sichuan Huili Nickel Ore. Thereafter Jinchuan Nickel Ore, Panshi Nickel Ore(now Jilin Nickel Industry Group Co., Ltd) put into production. At present, nickel output has already reached above 6 ten thousand tons every year.Nickel is a silvery white solid at room temperature. It is tough and tensile, and can be magnetized. It is the fourth period and the eighth clan element in the element periodic table, which determined its physical and chemical characteristics. A lot of physical chemistry nature of nickel, cobalt iron is approximate. Its intimate oxygen and intimate sulphur are similar because of near copper. The nickel surface can form compact oxidized film, so it is dissolved very slowly in the thin acid, and passivated very easily in the powerful oxidized medium. It has a good resisting corrosiveness in the lye, salt water and substance. Because of great machinery intensity and mealleability, nickel is utilized to produce rusty alloy steel, special alloy and electroplating one etc, which is more than 80% of nickel consumption account. It can be used as chemical power, catalyst, dyestuffs, etc. In the nature, the nickel mainly exists by sulphide ore and oxide ore. The nickel sulphide ore can be riched through dressing, reduce the supplies quantity on later stage. The development and utilization of sulphide ore grow fast because it is relatively low smelting energy consumption and well synthetically resource utilization. Because nickel oxide ore raw materials grades is low, and relatively high smelting energy consumption, many even though many resources, but it develop slowly for a long time. It gets rapid development until recent years. Different resources, different energy conditions, different economic development and different market demand cause different nickel smelting process. The nickel sulphide ore and nickel oxide ore could be collected nickel through fire method smelting and wet method smelting. This text utilizes the fire method to smelt nickel-iron. The nickel-iron smelting technology receives people's attention more and more with the development of metallurgy industry and steel-making technology. In producing stainless steel and alloy steel that require nickel raw materials, nickel-iron has gradually replaced expensive electrolytic nickel because its production cost is cheap. It is exactly one of the development strategies of nickel industry in our country that develop the nickel-iron. At present, the ones that have been exploited at home are nickel sulphide ores. More technology route is nickel concentrate ——smelting and producing nickel matte——electrolytic nickel. Nickel sulphide ore often accompany gold, silver platinum tribe element, and it is unable to retrieve synthetically these metals that smelt the nickel-iron so that have limited the popularization and development of nickel-iron technology. The nickel sulphide ore of Jilin Nickel industry Group Co., Ltd is poor platinum tribe element resource. The grade of nickel is above 7% in nickel concentrate, so it Is ideal raw materials which smelt nickel-iron. This experimental study is directed against the nature and characteristic of nickel concentrate, have made the technology route, and has carried on comparatively detailed small experimental study. Experiment has chosen the technology route that is nickel concentrate——completely oxidizing and roasting——pre-reducing——smelting the nickel-iron——refining nickel-iron. The nickel concentrate has been completely oxidized... |
PDF Full Text Request