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Device and method for producing nickel-cobalt alloy and molten iron through selective reduction and step-by-step smelting of limonite type laterite-nickel ore
The invention discloses a device and method for producing nickel-cobalt alloy and molten iron through selective reduction-step-by-step smelting of limonite type laterite-nickel ore, and belongs to the technical field of mineral processing and metallurgy. The device comprises a stock bin, a screw feeder, a multi-stage cyclone preheating and drying system, a flue gas dust removal system, a fluidized roasting main furnace heating system, a first cyclone separation barrel, a fluidized reduction reactor, a second cyclone separation barrel, a first electric furnace smelting reactor and a second electric furnace smelting reactor. The method comprises the following steps that the limonite type laterite-nickel ore is placed in a stock bin; feeding into a multi-stage cyclone preheating drying system, preheating, and then feeding into a roasting main furnace to heat, dehydrate and decompose to form a dry material; solid materials formed through gas-solid separation enter a reduction reactor, and high-temperature flue gas returns to a system to be preheated and dried; nitrogen and reducing gas are respectively introduced into an inlet of the reduction reactor to form a reduced material which flows out from a discharge hole; solid materials subjected to gas-solid separation enter a smelting reactor, and excess gas burns to supply heat; and smelting and reducing the iron-rich slag, and discharging after smelting.
一种褐铁型红土镍矿选择性还原‑分步熔炼生产镍钴合金与铁水的装置及方法，属于矿物加工及冶金技术领域。其装置包括料仓、螺旋给料机、多级旋风预热干燥系统、烟气除尘系统、流态化焙烧主炉加热系统、第一旋风分离筒、流态化还原反应器、第二旋风分离筒、第一电炉熔炼反应器和第二电炉熔炼反应器。方法步骤如下：褐铁型红土镍矿置于料仓；给入多级旋风预热干燥系统，预热后进入焙烧主炉加热脱水分解形成干燥物料；经气固分离形成固体物料进入还原反应器，高温烟气返回系统预热干燥；还原反应器入口分别通入氮气和还原气，形成还原物料从出料口流出；经气固分离的固体物料进入熔炼反应器，过剩气体燃烧供热；富铁炉渣熔融还原，熔炼后放出。
Device and method for producing nickel-cobalt alloy and molten iron through selective reduction and step-by-step smelting of limonite type laterite-nickel ore
The invention discloses a device and method for producing nickel-cobalt alloy and molten iron through selective reduction-step-by-step smelting of limonite type laterite-nickel ore, and belongs to the technical field of mineral processing and metallurgy. The device comprises a stock bin, a screw feeder, a multi-stage cyclone preheating and drying system, a flue gas dust removal system, a fluidized roasting main furnace heating system, a first cyclone separation barrel, a fluidized reduction reactor, a second cyclone separation barrel, a first electric furnace smelting reactor and a second electric furnace smelting reactor. The method comprises the following steps that the limonite type laterite-nickel ore is placed in a stock bin; feeding into a multi-stage cyclone preheating drying system, preheating, and then feeding into a roasting main furnace to heat, dehydrate and decompose to form a dry material; solid materials formed through gas-solid separation enter a reduction reactor, and high-temperature flue gas returns to a system to be preheated and dried; nitrogen and reducing gas are respectively introduced into an inlet of the reduction reactor to form a reduced material which flows out from a discharge hole; solid materials subjected to gas-solid separation enter a smelting reactor, and excess gas burns to supply heat; and smelting and reducing the iron-rich slag, and discharging after smelting.
一种褐铁型红土镍矿选择性还原‑分步熔炼生产镍钴合金与铁水的装置及方法，属于矿物加工及冶金技术领域。其装置包括料仓、螺旋给料机、多级旋风预热干燥系统、烟气除尘系统、流态化焙烧主炉加热系统、第一旋风分离筒、流态化还原反应器、第二旋风分离筒、第一电炉熔炼反应器和第二电炉熔炼反应器。方法步骤如下：褐铁型红土镍矿置于料仓；给入多级旋风预热干燥系统，预热后进入焙烧主炉加热脱水分解形成干燥物料；经气固分离形成固体物料进入还原反应器，高温烟气返回系统预热干燥；还原反应器入口分别通入氮气和还原气，形成还原物料从出料口流出；经气固分离的固体物料进入熔炼反应器，过剩气体燃烧供热；富铁炉渣熔融还原，熔炼后放出。
Device and method for producing nickel-cobalt alloy and molten iron through selective reduction and step-by-step smelting of limonite type laterite-nickel ore
一种褐铁型红土镍矿选择性还原-分步熔炼生产镍钴合金与铁水的装置及方法
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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| Europäisches Patentamt | 2024