Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method for producing macrocrystalline fused magnesite and co-producing fused magnesite and light calcined magnesia by one-step method
The invention relates to the technical field of fused magnesite production, in particular to a preparation method for producing macrocrystalline fused magnesite and co-producing fused magnesite and light calcined magnesia through a one-step method. The preparation method comprises the following steps: selecting magnesite which has the magnesium oxide content of more than 45wt% and is ground to the granularity of 30-80mm as a raw material; smelting in an electric arc furnace: adding the magnesite raw material into a closed double-body electric smelting magnesium smelting furnace, and continuously electrifying and smelting for 7-10 hours at the temperature of 3000-3500 DEG C; and after smelting is finished, a hot air circulation temperature control system of the closed double-body fused magnesia smelting furnace is started, heat preservation cooling crystallization, graded crushing and screening are carried out, and large-crystal fused magnesia, fused magnesia and light calcined magnesia are obtained. According to the invention, the energy consumption and the operation cost are greatly saved, the magnesium oxide content of the obtained macrocrystalline fused magnesite is more than 98.5 wt%, and the lattice size is more than 5000 [mu] m; the content of fused magnesite is more than 98%, and the lattice size is more than 500 microns; the burning loss of the light calcined magnesia is below 20%, and different product specifications can be widely applied to different fields such as spaceflight, electronics, steel, metallurgy and the like.
本发明涉及电熔镁砂生产技术领域，具体是一种一步法生产大结晶电熔镁砂联产电熔镁砂、轻烧氧化镁的制备方法。选取氧化镁含量45wt％以上，磨碎至粒度30mm～80mm的菱镁矿石为原料；电弧炉熔炼：将上述菱镁矿石原料加入密闭式双体电熔镁熔炼炉中，在3000～3500℃持续通电熔炼7～10小时；在熔炼结束后，启动密闭式双体电熔镁熔炼炉的热风循环温控系统，进行保温冷却结晶，分级破碎、筛分，获得大结晶电熔镁砂、电熔镁砂、轻烧氧化镁。本发明大幅节约了能耗和运营成本，其得到大结晶电熔镁砂氧化镁含量98.5wt％以上，晶格尺寸5000μm以上；电熔镁砂98％以上，晶格尺寸500微米以上；轻烧氧化镁灼烧减量20％以下，不同产品规格可广泛应用于航天、电子、钢铁、冶金等不同领域。
Preparation method for producing macrocrystalline fused magnesite and co-producing fused magnesite and light calcined magnesia by one-step method
The invention relates to the technical field of fused magnesite production, in particular to a preparation method for producing macrocrystalline fused magnesite and co-producing fused magnesite and light calcined magnesia through a one-step method. The preparation method comprises the following steps: selecting magnesite which has the magnesium oxide content of more than 45wt% and is ground to the granularity of 30-80mm as a raw material; smelting in an electric arc furnace: adding the magnesite raw material into a closed double-body electric smelting magnesium smelting furnace, and continuously electrifying and smelting for 7-10 hours at the temperature of 3000-3500 DEG C; and after smelting is finished, a hot air circulation temperature control system of the closed double-body fused magnesia smelting furnace is started, heat preservation cooling crystallization, graded crushing and screening are carried out, and large-crystal fused magnesia, fused magnesia and light calcined magnesia are obtained. According to the invention, the energy consumption and the operation cost are greatly saved, the magnesium oxide content of the obtained macrocrystalline fused magnesite is more than 98.5 wt%, and the lattice size is more than 5000 [mu] m; the content of fused magnesite is more than 98%, and the lattice size is more than 500 microns; the burning loss of the light calcined magnesia is below 20%, and different product specifications can be widely applied to different fields such as spaceflight, electronics, steel, metallurgy and the like.
本发明涉及电熔镁砂生产技术领域，具体是一种一步法生产大结晶电熔镁砂联产电熔镁砂、轻烧氧化镁的制备方法。选取氧化镁含量45wt％以上，磨碎至粒度30mm～80mm的菱镁矿石为原料；电弧炉熔炼：将上述菱镁矿石原料加入密闭式双体电熔镁熔炼炉中，在3000～3500℃持续通电熔炼7～10小时；在熔炼结束后，启动密闭式双体电熔镁熔炼炉的热风循环温控系统，进行保温冷却结晶，分级破碎、筛分，获得大结晶电熔镁砂、电熔镁砂、轻烧氧化镁。本发明大幅节约了能耗和运营成本，其得到大结晶电熔镁砂氧化镁含量98.5wt％以上，晶格尺寸5000μm以上；电熔镁砂98％以上，晶格尺寸500微米以上；轻烧氧化镁灼烧减量20％以下，不同产品规格可广泛应用于航天、电子、钢铁、冶金等不同领域。
Preparation method for producing macrocrystalline fused magnesite and co-producing fused magnesite and light calcined magnesia by one-step method
一步法生产大结晶电熔镁砂联产电熔镁砂、轻烧氧化镁的制备方法
LUAN LUXIANG (Autor:in)
13.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Submerged arc furnace for producing macrocrystalline fused magnesite
| Europäisches Patentamt | 2021
Method and device for producing light calcined magnesia from magnesite
| Europäisches Patentamt | 2020