Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for producing ferronickel through fluidized preheating and prereduction-electric furnace smelting of limonite type laterite-nickel ore
A method for producing ferronickel through fluidized preheating and prereduction-electric furnace smelting of limonite type laterite-nickel ore belongs to the technical field of mineral processing and metallurgy and comprises the following steps that the limonite type laterite-nickel ore is finely crushed and then placed in a stock bin; the method comprises the following steps: feeding laterite-nickel ore into a multi-stage cyclone preheating dehydration system, preheating to remove adsorbed water, and dehydrating and roasting in a heating system, so that goethite in the laterite-nickel ore is decomposed to form a dehydrated material; carrying out gas-solid separation to form a primary solid material, and carrying out selective reduction roasting to form a reduced material; secondary solid materials are formed through gas-solid separation, the secondary solid materials enter an electric furnace smelting reduction reactor after the silicon-iron ratio is adjusted, and formed iron silicate and molten nickel iron flow out of a discharging opening; and cooling to obtain the iron silicate slag and the nickel-iron alloy. The method is high in gas-solid mass transfer and heat transfer efficiency, rapid in reaction and low in roasting energy consumption, the problem that tailings in the high-pressure acid leaching process are difficult to dispose is solved, and comprehensive utilization of the limonite type laterite-nickel ore is achieved.
一种褐铁型红土镍矿流态化预热预还原‑电炉熔炼生产镍铁的方法，属于矿物加工及冶金技术领域，步骤如下：褐铁型红土镍矿细碎后置于料仓；红土镍矿给入多级旋风预热脱水系统，经预热脱去吸附水后进入加热系统脱水焙烧，使红土镍矿中的针铁矿分解形成脱水物料；经气固分离后形成一次固体物料，进行选择性还原焙烧，形成还原物料；气固分离形成二次固体物料，调整硅铁比后进入电炉熔炼还原反应器，形成硅酸铁和镍铁水分别从出料口流出；冷却后得硅酸铁炉渣和镍铁合金。本方法气固传质传热效率高，反应迅速，焙烧能耗低，解决了高压酸浸工艺尾渣难以处置的问题，实现了褐铁型红土镍矿的综合利用。
Method for producing ferronickel through fluidized preheating and prereduction-electric furnace smelting of limonite type laterite-nickel ore
A method for producing ferronickel through fluidized preheating and prereduction-electric furnace smelting of limonite type laterite-nickel ore belongs to the technical field of mineral processing and metallurgy and comprises the following steps that the limonite type laterite-nickel ore is finely crushed and then placed in a stock bin; the method comprises the following steps: feeding laterite-nickel ore into a multi-stage cyclone preheating dehydration system, preheating to remove adsorbed water, and dehydrating and roasting in a heating system, so that goethite in the laterite-nickel ore is decomposed to form a dehydrated material; carrying out gas-solid separation to form a primary solid material, and carrying out selective reduction roasting to form a reduced material; secondary solid materials are formed through gas-solid separation, the secondary solid materials enter an electric furnace smelting reduction reactor after the silicon-iron ratio is adjusted, and formed iron silicate and molten nickel iron flow out of a discharging opening; and cooling to obtain the iron silicate slag and the nickel-iron alloy. The method is high in gas-solid mass transfer and heat transfer efficiency, rapid in reaction and low in roasting energy consumption, the problem that tailings in the high-pressure acid leaching process are difficult to dispose is solved, and comprehensive utilization of the limonite type laterite-nickel ore is achieved.
一种褐铁型红土镍矿流态化预热预还原‑电炉熔炼生产镍铁的方法，属于矿物加工及冶金技术领域，步骤如下：褐铁型红土镍矿细碎后置于料仓；红土镍矿给入多级旋风预热脱水系统，经预热脱去吸附水后进入加热系统脱水焙烧，使红土镍矿中的针铁矿分解形成脱水物料；经气固分离后形成一次固体物料，进行选择性还原焙烧，形成还原物料；气固分离形成二次固体物料，调整硅铁比后进入电炉熔炼还原反应器，形成硅酸铁和镍铁水分别从出料口流出；冷却后得硅酸铁炉渣和镍铁合金。本方法气固传质传热效率高，反应迅速，焙烧能耗低，解决了高压酸浸工艺尾渣难以处置的问题，实现了褐铁型红土镍矿的综合利用。
Method for producing ferronickel through fluidized preheating and prereduction-electric furnace smelting of limonite type laterite-nickel ore
一种褐铁型红土镍矿流态化预热预还原-电炉熔炼生产镍铁的方法
HAN YUEXIN (Autor:in) / YU JIANWEN (Autor:in) / LI PEIYU (Autor:in) / LI YANJUN (Autor:in) / GAO PENG (Autor:in) / JIN JIANPING (Autor:in) / SUN YONGSHENG (Autor:in)
01.03.2024
Patent
Elektronische Ressource
Chinesisch
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