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    • 2. 发明申请
    • METHOD AND APPARATUS FOR MANUFACTURING FERROCHROME
    • 用于制造铁磁体的方法和设备
    • WO2012067353A3
    • 2012-07-12
    • PCT/KR2011007801
    • 2011-10-19
    • POSCOLEE YOUNG-SEOKCHO MINYOUNGYOON YOUNG SIKKANG YONG SOO
    • LEE YOUNG-SEOKCHO MINYOUNGYOON YOUNG SIKKANG YONG SOO
    • C22C33/04
    • C22B1/00C22B34/32
    • Provided is a method and apparatus for manufacturing ferrochrome. According to the present invention, the method for manufacturing ferrochrome comprises the steps of: heating fine chromium ore; pre-reducing the heated fine chromium ore; mixing a flux into the fine chromium ore; preparing a compacted body after mixing the pre-reduced fine chromium ore and the flux; and loading the compacted body into a smelting-reduction furnace, and performing smelting-reduction through the combustion of carbonaceous material. According to the present invention, fine chromium ore can be compacted in a non-melted state and smelting-reduction can be carried out at a low temperature using a flux. Thus, ferrochrome can be stably manufactured in the smelting-reduction furnace utilizing a carbon-based heat source.
    • 提供了一种制造铬铁的方法和设备。 根据本发明,制造铬铁的方法包括以下步骤:加热细铬矿; 预还原加热的细铬矿石; 将助熔剂混入细铬矿石中; 在预还原的细铬矿石和助熔剂混合后制备压实体; 并将该压制体装入熔融还原炉中,并通过燃烧碳质材料进行熔融还原。 根据本发明,细铬矿石可以在非熔化状态下被压实,并且可以使用助熔剂在低温下进行熔融还原。 因此,可以在利用碳基热源的熔炼还原炉中稳定地制造铬铁。
    • 3. 发明申请
    • FINE DIRECT REDUCED IRONS CONTAINING IRON CARBIDE AND PREPARATION APPARATUS THEREOF
    • 含有碳化铁的细直接还原铁及其制备装置
    • WO2012047041A3
    • 2012-05-31
    • PCT/KR2011007412
    • 2011-10-06
    • POSCOKIM HYUN SOOYI SANG-HOCHO MINYOUNG
    • KIM HYUN SOOYI SANG-HOCHO MINYOUNG
    • C22B1/16
    • C21B13/00C21B13/0073C21B13/0086Y02P10/136
    • Disclosed are fine direct reduced irons containing iron carbide and a preparation apparatus thereof. The fine direct reduced irons containing iron carbide of the present invention contains 20-30 wt% of iron carbide by reducing poorly reducible ultrafine ore in a reduction furnace and forming iron carbide on the surface by carbonization in a carbonization furnace. The apparatus for preparing fine direct reduced irons containing iron carbide of the present invention can effectively reduce and carbonize fine iron ore by selectively using hydrogen sulfide contained in a reducing gas in a carbonization furnace and a reduction furnace. The carbon content in fine direct reduced irons is increased by applying fine direct reduced irons containing iron carbide of the present invention, thereby improving melting properties, and it is possible to reduce fuel costs due to the increase of reduction and melting velocities.
    • 公开了含有碳化铁的精细直接还原铁及其制备装置。 本发明的含有碳化铁的细直接还原铁在还原炉中还原难还原性超细矿石,并通过在碳化炉中碳化而在表面形成碳化铁,从而含有20〜30重量%的碳化铁。 本发明的用于制备含有碳化铁的细直接还原铁的设备能够通过选择性地使用还原气体中包含的硫化氢在碳化炉和还原炉中有效地还原和碳化细铁矿石。 通过使用含有本发明的碳化铁的细直接还原铁,可以提高精细直接还原铁中的碳含量,从而提高熔融性能,并且由于还原速度和熔化速度的增加,可以降低燃料成本。